ORDER NO. VRDSTOSMIZS Service Manual Video Cassette Recorder Panasonic |\VHS|HQ NV-J2785 SPECIFICATIONS ITEM SPECIFICATION | rem SPECIFICATION SOURCE: 110~240 50/6012 OUTPUT: AUDIO OUT Connector (Phono typel POWER --—___" | aup1o =6dBV (500m¥), Less than 1k0 CONSUMPTION: 34 watts po SEER EP Onere TRACK: 1 track (Normalmono only) 2 rotary heads, helial scanning system ee Sy Ne ee [rAPE FORMAT | VHS Gassete tape (Tape width 12.7) SYSTEM PALINTSC ~ Lo : ‘SP; 23.39mm/s VHP I: CHCI~CHCS (PAL D/SECAM D0. LP: 11.605mm/s ‘Te TUNER VHP I: CHOS~CHC12 (PAL, D/SECAM DK) Revord/Playbsck Time: ayer UBF: CiHB21~CHiB69 (PAL USBCAM D.X) | TAPE SPEED ‘SP: 4 hours with 240min. type tape CHICL8~C#HC57 (PAL Dy LP: 8 hours with 240min. type tape “758 unbalanced, PRIREW Time: 2.5min, with 160min, type tape ‘UH: CHBS8:3 PAL USECAM D.K) = = RP OUT SYSTEM CHc2s-f Pat Dy 73=8aBy. DIMENSIONS | son) 860 <26a(Dimm 7a unbalanced : VIDEO INPUT: VIDEO IN Connector (Phono type) 1 pe AC Cord Adaptsr Ta Say a re nl AUDIO | ‘More than —10dBV (16m), | st MICROPHONE JACK ~704BV ‘Weight and dimensions shown are approximate, ‘Specifications ae subject to change without notice. PanasonicINTRODUCTION This service manual contains technical information which will allow service personnels to understand and service this model Section I presents you with some general information of features and controls, enabling you to become familiar with each function. Section 2 contributes to your mechanical and electrical adjustment as well disassembly and replacement Procedures. In the case of very common information relating to other models like mechanical adjustments, please refer to each service manual. Section 3 contains block diagrams which offers you information for checking and understanding each circuit, Schematic diagrams which give you detailed information such as waveforms, voltage data, function ete. Section 4 contains exploded views and parts list. Please place orders using the parts list and not the drawing reference numbers. If the circuit is changed or modified, this information will be followed by supplementary service manual to be filed with original service manual CONTENTS TECHNICAL INFORMATION SERVICE INFORMATION SECTION 1 GENERAL DESCRIPTIONS 11. G-ll MECHANISM .. 12, CONTROLS AND COMPONENTS 13. INFRA-RED REMOTE CONTROLLER & DIGITAL SCANNER SECTION 2 ADJUSTMENT PROCEDURES 24. DISASSEMBLY METHOD 22. MECHANICAL ADJUSTMENT PROCEDURES .. 23. ASSEMBLY AND ADJUSTMENT PROCEDURES OF MECHANISM 24, ELECTRICAL ADJUSTMENT PROCEDURES SECTION 3 BLOCK DIAGRAMS & SCHEMATIC DIAGRAMS 31, SYSTEM CONTROL & SERVO BLOCK DIAGRAM .. 32. LUMINANCE & CHROMINANCE BLOCK DIAGRAM 33, KARAOKE BLOCK DIAGRAM 34. TV DEMODULATOR & MULTI DECODER BLOCK DIAGRAM 35. POWER BLOCK DIAGRAM ..3:30, 331. 3:32, 333, ). SYSTEM CONTROL & SERVO SCHEMATIC DIAGRAM ...... . LUMINANCE & CHROMINANCE SCHEMATIC DIAGRAM . . LUMINANCE & CHROMINANCE PACK CBA. . INPUT/OUTPUT PACK C.B.A. .. 3. AUDIO SCHEMATIC DIAGRAM... . MULTI DECODER PACK C.B.A. .... |. TV DEMODULATOR PACK SCHEMATIC DIAGRAM . |. TV DEMODULATOR PACK C.B.A. . TIMER & OPERATION SCHEMATIC DIAGRAM |. TIMER C.B.A. & OPERATION CB.A. . RF CONVERTER SCHEMATIC DIAGRAM . RF CONVERTER SCHEMATIC DIAGRAM. |. MAIN CBA. POWER CB. ot POWER SCHEMATIC DIAGRAM SUB SYSTEM CONTROL PACK CBA. LUMINANCE & CHROMINANCE PACK SCHEMATIC DIAGRAM. INPUT/OUTPUT PACK SCHEMATIC DIAGRAM HEAD AMP SCHEMATIC DIAGRAM HEAD AMP CBA. KARAOKE PACK SCHEMATIC DIAGRAM KARAOKE PACK CB.A. ae MULTI DECODER PACK SCHEMATIC DIAGRAM. REMOTE CONTROLLER SCHEMATIC DIAGRAM REMOTE CONTROLLER CBA. ... INTERCONNECTION SCHEMATIC DIAGRAM ICs & TRs INFORMATION SECTION 4 EXPLODED VIEWS & PARTS LIST .. 4, 43. EXPLODED VIEW nnn CHASSIS PARTS SECTION (1) CHASSIS PARTS SECTION (2) CASSETTE UP MECHANISM SECTION... CASING PARTS SECTION PACKING PARTS SECTION . REMOTE CONTROLLER UNIT MECHANICAL REPLACEMENT PARTS LIST ELECTRICAL REPLACEMENT PARTS LIST .., See eNe REMARKS: When receiving a SECAM broadcast, this VIR will record the programme in the MESECAM system. If a video cassette recorded in the SECAM system on SECAM VHS video recorder is played back in the MESECAM eystem or iff a video cassette recorded on this VTR in the MESECAM system is played back on another VTTR in the SECAM system, the playback picture will be in black and white,Technical Information Please pay attention when you Method (Contacting jumper replace the memory IC 1CT502 Timer C.B.A.) (MN12C261D) on Timer C.B.A. Since the any data for new memory 1.Contact the wire on lead wires between IC has been initialized at pin 54 and pin 35 on the Timer factory,the bugzer"on"data should ICT501 twice by using jumper wire be always set on the memory IC as shown below. when your repairing 2.Confirm that "Beep-Beep” sound The following steps must be from the VIR warm you when performed after installing the new memory IC to Timer C.B.A. setting any programmes. JUMPER WIRE \t* ee JUMPER WIRE 4 leg yas 9 P7501 al] J [ ito rsa | 17501 ; aSERVICE INFORMATION 1-1. HOW TO CHECK THE CRACKED CHIP PART (1) Apply heat to tha soldered portions of chip Bart using a soldering iron for about 2-3 seconds, (2) If the chip part is faulty,it will be broken or cracked. Caution:Do not leave soldering iron on the PCB too long as damage may occur to the PCB or the chip parts. SOLDERED PORTIONS SOLDERING em IRON xl) CHIP PART Fig. $1 Note: Regarding intermittent faults Tha main causes of these faults are poor soldering and cracked chip parts. 1-2, HOW TO REPLACE THE CHIP PART 1) REMOVAL (RESISTOR, CAPACITOR, etc...) (1) Presolder the one side of soldering portion for chip part and grasp the chip part by tweezers, (2) Melt the presoldered portion. And then remove the chip part with @ twisting motion whil melting the soldering portion of another si 2) REMOVAL (transistor, diode, ete...) (1) Grasp the chip part with tweezers and melt the solder of one lead. TWEEZERS CHIP PART—~ ‘SOLDERING IRON Fig. $3 (2) Lift the side of that lead upward. TWEEZERS: CHIP PART- SOLDERING IRON Fig. $4 Caution:Do not lift the chip part too high as damage may occur to the PCB or the leads that are still soldered on the PCB. (3) Simultaneously heat the solder of the two remaining leads and lift part to remove, SOLDERING CHIP PART IRON quickly. TWEEZERS ae CHIP PART! 3) INSTALLATION PRESOLDER’ (1) Presolder the one side of contact point on the SOLDERING IRON Fig. $2 Circuit board. SOLDERING IRON PRESOLDER Fig. $6(2) To install the chip parthold in position using tweezers, apply heat to the pre-soldered portions using ‘a fine tip soldering iron (3) Solder the other side of ‘the chip part. (4) Check your soldering ‘SOLDERING IRON ‘SOLDER, (WITH SOLDERING IRON) (1) Using solder, braid remove the solder from all pins of the Fiat-IC, When you use the solder flux which is applied to all pins of the Flat-iC,you can remove it easily. DE-SOLDER BRAIDS SOLDERING IRON Fig. 87 1-3 HOW TO REMOVE THE FLAT-IC (WITH HOT-AIR FLAT-IC DESOLDERING MACHINE) (FOR EXAMPL Fig. $8 (1) Prepare the HOT-AIR FLAT-IC DESOLDERING MACHINE. And then apply hot air to FLAT-IC about 5 ~ 8 seconds, (2) Remove the FLAT-IC with tweezers while applying the hot air. Caution:Do not supply the hot, air to the chip parts around the Flat-IC for long time ac as damage _may occur around the Flat Ic to the chip parts }—-HOT-AIR FLAT-IC DESOLDERING MACHINE 2 ae 2 FLAT~IC ‘TWEEZERS Fig. $9 Fig. S10 (2) Lift each lead of the Flat-IC upward one by one using @ sharp pin or non solder wire(iron wire),while heating ‘the pins using a fine tip soldering iron or a hot air blower. SOLDERING IRON (WITH IRON WIRE) (1) Affix the wire to workbench or solid mounting point as shown in Fig.$12. (2) Pull up wire as the solder melts so as to lift the IC lead from the PCB contact pad.while heating the pins using @ fine tip soldering iron or hot air blower. IRON WIRE OR SOLDERING iRON Fig. S12, Note:When using @ soldering iron care must be taken to ensure that the Flat IC is not being held. by glue before it is the PCB may be damaged if force is used.1-4. HOW TO EJECT MANUALLY if the electrical circuit is defective and the action of unlosding and front unloading do not Work properly, it is possible to eject manually as follows 1, Take out the main AC. 2, Rolease the Change Lever by pushing it to arrow mark direction as shown in Fig. 81. 3. Turn the Capstan Motor to counter clockwise slowly until the Clutch Disk is locked, (Clutch Disk is locked once in one rotation.) 4. Release the Change Lever again when the Clutch Disk is locked, 8. Reoeat the itom 2 and the item 3 until cassette is ejectes CENTRE PULLEY TIMING BELT 1-5. HOW TO SEE THE MOVEMENT OF MECHANISM WITHOUT CASSETTE COMPARTMENT Since capstan motor works as loading motor and front loading motor, phase relationship between cassette compartment ‘and mechanism is important, 80 playback and FF/REW can not be performed even just only taking out the cassette compartment, however if you want to see the mechanical movernent without cassette compartment, it is possible as follows. 1. Take out the main AC, 2. Take out the flexible (or flat) cable from connector on the cassette compartment and remove the cassette compartment from chassis. Set the mechanism to STOP 1 mode as following items 3,4.5,6, 3. Rolease ‘the Change Lever by pushing it to arrow mark direction as shown in Fig.S13. 4. Turn the Capstan Motor to clockwise until the Clutch Disk is locked. {Clutch Disk is locked once in ona rotation.) Roloase the Change Lever again winen Clutch Disk is locke Ropeat item 4 and 5 until mechanism come to STOP 1 position as shown in Fig.St4. * To confirm the STOP 1 mode, Press the Sub Cam Follower to arrow mark direction as indicated in Fig.G5 and turn the capstan motor to both of forward and reverse direction. If takeup reel table is rotated when capstan is rotated forward and if supply reel table is rotated when capstan is rotated reverse, that is STOP 1 position. 7. Turn the power on, 8. Now, any operation can be performed without cassette compartment, CAPSTAN ROTOR TIMING BELT © Hee IO ® oats Fig. $13 How to Eject Manually SUB LOADING ARM pS Fig. 814 STOP 1 Condition * Note.t Do not add the large torque to any gears not broak it. * Note.2 When reinstalling the cassette compartment, refer to item 2-38-13 Reinstallation of Cassette Compartment, = Note.3 Even’ though cassette switch is not connected to microprocessor,unit can work correctly,1-4. G-ll MECHANISM SECTION 1 GENERAL DESCRIPTIONS GIl_ mechanism has been developed to improve its Performance based on conventional G _ mechanism, which is featuring JOG & SHUTTLE Search, High accurate editing and Reverse fine siow. {Quik Operation In order to helps reverse achieve above features quickly, Gil ‘mechanism employs an additional REVIEW MOTOR which tape” transference during Reverse Playback, Review, Unloading, Reverse slow and Reverse frame advance. (Also loading) The REVIEW MOTOR releases the Tension post and rotates the Supply reel table quickly despite that ‘the G mechanism can not do so fast. And_it_also works just before mechanism is moved to FF/REW mode, that is to release the Sub-Lever, eventually mechanical movernent to FF/REW become very quick. BEARING UNIT. MoTOR Because in the case of conventional G mechanism, Capstan motor oy i falecee eee ae wea th Gi, fale nel Supply or Take-up reel table respectively that {fester response time with the Dual-mede Loading top] To improve mechanical response time, Gl mechanism employs the Dual-mode Loading Stop system which stops mechanism at either half loading or full loating condition depends on function before anit i, After cassette tape with safety tab is inserted, mechanism goes to Full Loading position and stopped automatically At the same time DD Cylinder is rotated. This is initial. stop condition “of Gil_mechanism (called STOP 2) to obtain the playback picture quickly. When "stop button is pressed during _ playback (including Special playback) and recording, unit is also stopped at "STOP 2° condition’ (Full loading condition) for waiting playback or recording command. (In this time OD Cylinder is rotated.) If eny” button is not pressed for more than 10 minutes, DD Cylinder is stopped automatically, however, Full loading condition is still remained, This gives us high accurate editing even when unit goes to recording via stop mode. In the case of G ‘mechanism, there is possibility to be erased the Previous recorded signal if STOP end REC PAUSE is Fepeated Because, during unloading, tape may excessively be wound” by | Supply reel” table depend on tape diameter. Gl “mechanism solve this problem by adopting "STOP 2° position. If stop button is pressed during FF/REW, unit goes xo Half Loading condition (éalled STOP. 1) “and stopped G Mechanism ‘G-REV. Mechanism GU Mechanism Stop Supe (Hatt Loacing Stop System) | (FulLoading Stop System) stop MODE "| OQ | COD | OF | OS HaifLoading Stop System | HallLoacing Stop System Dual Loading Stop System SEARCH 7 x79 SPEED (Decided by Miccoprocessor) 2 1 MOTOR 4.MOTOR Buti MOTOR (CAPSTANMOTOR) (CAPSTAN MOT « 1OTOR) (CAPSTAN MOTOR) (REVEN MOTOR Lap Time Counter FEATURES Lap Time Counter Lep Time Counter Jog & Shute Search Reverse Fine Slow Fig. G2 Comparison Chart of G/G-REV/Gll 1-1‘As described, Gil mechanism is employed REVIEW MOTOR and new Capstan motor. Figure G3. shows response time of G mechanism and GIl mechanism, New Capstan stator makes high speed mechanism. 6 soils on the Capstan stator aro changed for obtain the voltage supplied than conventional one. Review Motor improve the response of mode switch time. Moreover Gli mechanism employs Dual-mode loading system.(Already described) Therefore response of Gil mechanism is improved. higher speed rotation even the same drive Scenes Access = | _— 10.0 sec (G)-+5.7 sec (Gil) STOP 2 (full loading) | 5.7 sec (G)-+2.0 sec (GI) | STOP 1 (half loading)—> ; 5.7 sec (G)-+3.6 sec (GI) - Mode Switch Time STOP 1—>FF/REW 27 sec (G)+0.6 sec (GI) PLAY—CUEIREV. - 0.5/2.5 sec (G)-+0.6 sec (GI) | High Speed Tape Time FFIREW - 4 min, 50 sec (G)—-2 min, 30 sec (GI) (TAPE: NV-E180) Fig. G3 Response Time of G and Gll Mechanism[Additional machanism sequence] GI mechanism _is added on some now parts are Additional sequence of GI mechanism as mentioned driven by REVIEW MOTOR, below. REVIEW MOTOR] [WORM WAEEL BEARING UN] crac 86.7 (Gaon REV. GLUTGH UNTTIC» [TENSION RELEASE CLUTCH UNTT|O> [TENSION RELEASLEvEA|C’> [TENSION POST] OPERATION : : 2 B . COMPLETION) REV. ARMUNT] > [SUPPLY REEL TABLE] (Review ODE) “StPoy el tebe ioe ater else a the Tension post. [SuBLEVER Gan] [sus caFoULoweR|e> [SuBLEVER] (sTO1-FriREW MODE) MODE Dirscton of REVIEW MOTOR "AFTER LOADING OPERATION+STOP 2 COMPLETION COUNTER CLOCKWISE i REVIEW MODE - COUNTER CLOCKWISE STOP 1>FFIREW MODE 7 CLOCKWISE: Fig. G4 Flowchart of Gll Mechanism Additional Sequence ~~ REV. MOTOR ROTATES COUNTER CLOCKWISE MOnareel REV. MOTOR TIMING BELT TENSION PULLEY BASE (UNIT TENSION RELEASE LEVER | fo | Tt SUB LEVER REV. CLUTCH UNIT REVIEW CONTROL LEVER \ CAM REV. ARM UNIT TENSION RELEASE CLUTCH UNIT| | SUB CAM FOLLOWER Fig. G8 Bottom View of Gil Mechanism 1-31-2. CONTROLS AND COMPONENTS. FRONT eo 96 6690 0 ® Oo oo or om 00 Gan oo oo Cit} 5 Ol} ® ® © x Squat (a | a eee arr 1 O [+ [="]} l | ia b> Pe om ea mm ] a J J T ® ® © ieee ene © Microphone 1 Input Socket @ Karaoke Switch See dreetneyancrev @ VA On/OH Switch wih nciator OFF: Forordnaty use ne VTE. (Bass sounds are emphasized.) © Microphone 2 Input Socket 2: Use this positon, if the “1” position causes vibration © Picture Shapness Conte! © Noise Filter/Edit Selector EDITON: For editing operations such as dubbing, OFF: For ordinary use of the VTR, NOISE FILTER ON’ For playback of tapes with inferior picture quality caused, for example, by repeated dubbing. often the Nalse Filter/Edit Selector Is set to “EDIT the picture sharpness cannot be adjusted with pebiaue ‘Sharpness Control. © Cassette Compartment of the speaker ofthe TV se. (Bass sounds are de-emphasized} © TWsystem Selector Select the TV station of the TV station which s desired to be tuned. PALD: China PALL: Hong Kong SECAMD.K: Eastern Europe, Vietnam VHF UHE 1 m u PALD 1-5 | e-12 | 13-57 PALI NOTAVAILABLE | 21-69 SECAMD.K 1-8 | 6-12 | 21-69© VIR system Selector When dubbing an NTSC system tape, set the VTR System Selectors on both the recording and playback VTRs to 4.43" oF "3.58", When dubbing an NTSC 4.43 system tape: Set the VTR System Selector to “443° When dubbing an NTSC 3.58 system tape: Set the VTR System Selector to 3.58 ‘¢When the VTR System Selector is set to "4.43" or “3.58", PAL signals cannot be recorded correctly ‘When dubbing a PAL system tape, sat the VTR System Selectors on both the recording and playback VTRs to “PALIMESECAM’. ® intr-red Remote Control Reveiver ® Insert Easting Inccator ® Mut.Function Dispiay Multi-Function Display 0} de ® Con Panel Open Button ® Digital Tracking nciator When playback is started after inserting a cassette, and the VTR is tured on, the Digital Tracking function will be activated automatically, the Digital Tracking Indicator will flash for several seconds, and the tracking will be adjusted automatically (after the adjustment, the Digital Tracking Indicator will remain it). ‘*During playback, the Digital Tracking function will be activated whenever the playback changes over from an unrecorded part to a recorded part, provided the recorded partis longer than 4 seconds. the Tracking "++" or "=" Button to select manual tracking and adjust with these two buttons, The Digital Tracking Indicator goes out To change back to Digital Tracking, press the | Tracking "+" and-"Buttons simultaneous. | — ) ‘¢When the picture is distorted by noise bars, press su]f makers MOTUWE) THER SA} Cassette-in Indicator Tape Running Display Date Display Timer Programme Number Wiite indicator OTR Indicator Timer Recording Indicator @®2OPOOGOO Recording Indicator ONT D RS) booe ON ‘When dew forms: Dew indicator Tape Speed indicator Channel Display Position indicator Counter Mode indicator Repeat Indicator Search Indicator Memory indicator @G@S88 0880 Clock/Counter Display© Microphone Level Control ® Pray Buton >) © Echo Conte @ Fast Fonvard P/Cue ES Button ® CockButton @ Eject Buon (a) © Preset Fne/Normal Button @® Channel Selection Up and Down Buttons ® Timer contois ® oTAonButons @ Bandar Button © oTAoHButons @® CiearButton @ inser iting Button @ Tepe Speed Button @ Pausoisei Button (ay @® Timer Record Buton ® Stop Buton (a) @ Rewind ) © Rewind 5. TIMER CBA. & 7. CASSETTE OPERATION C.B.A, COMPARTMENT Fig. Dt 2-1-2. DETAIL OF DISASSEMBLY METHOD 1, REMOVAL OF THE TOP PANEL 2, REMOVAL OF THE BOTTOM PLATE * Remove. Screws (A) * Remove... Screws (B) ] TOP PANEL BOTTOM PLATE Bonennview) rT = mm r BLACK Screws (A) \ 0 XO Fig. D2 screws (8) Bone Fig. D33. REMOVAL OF THE FRONT PANEL UNIT WITH KEY BOARD PANEL UNIT + Romove....Ssraw (C) r [remm f [12mm i 8mm * Unlock...8 Tabs (0) * Disconnect... Connector (E) Re Baer —— Oo Ow TOP VIEW E Joo Seraw tH) oy EAR FRONT PANEL UNIT seo serous () / SARI serous (F) Connector (E) Tabs (D) it Fa. 4 POWER SUPPLY ee ae MAIN CBA. TOP View Seraws (6) 4. REMOVAL OF THE MAIN C.B.A. AND. POWER SUPPLY UNIT (1) REMOVAL OF THE MAIN C.B.A. ‘t Remove.....3 Screws (F) and 4 Screws (G) * Remove.....Earth Spring (2) REMOVAL OF THE POWER SUPPLY UNIT * Remo * Remove. Fig. 08 5. REMOVAL OF THE OPERATION C.8.A, AND TIMER C.B.A. (1) REMOVAL OF THE OPERATION C.B.A. Remove.....2 Scraws (J) * Unlock....2 Tabs (K) (2) REMOVAL OF THE TIMER C.B.A. + Remove. * Unlock, ‘LI Ren OPERATION C.B.A, TIMER C.8.A. Sorews (L) Screws (J) Tab (M) 2 Screws (L) Tab (M) [Fron View] Tabs (KK) Fig. 066. SERVICING Fig. D7 7. REMOVAL OF THE CASSETTE COMPARTMENT Remove 2 screws (N) and slide the cassette holder until appearing 2 screws (0) by turning (clockwise) the ‘capstan rotor, unit (located in the bottom side) end then remove 2 screws (0), Remove the flexible wire from connector P160 mounted on Take-up photo Tr. C.B.A., then carefully pull out the cassette compartment, Screws (N) P1508 (N) (0) (s) a aco _| Capstan Motor Change Lever Center pulley Fig. D98. REMOVAL OF CLEANER ARM UNIT 1. Hook the Spring Arm Hook (Q). 2. Unlock the locking portion (R) and then remove the Cleaner Arm Unit. (P) to lower side of NoTE: (1) Perform. the steps in the reverse order when Assembling. (2) When replacing Upoer Cylinder, replace Cleaner Arm at the same time. 2-2: MECHANICAL ADJUSTMENT PROCEDURES 22:1, TENSION ADJUSTMENT OF TIMING BELT FOR CAPSTAN MOTOR (Equipment Required) Fan Type Tension Gauge (VFK62) (Specification) 40 + 6g HEAD AMP UNIT z When installing Cleaner Arm Unit, Spring Arms should be fixed ae follows. <> 1. Loosen a screwdriver. 2, Set the Fan Type Tension Gauge to the direction indicated by the arrow (B) as shown in Fig.Mi 3. Tighten screw (A) when the raading of the Fen Type Tension Gauge becomes within 40 +— 5g. serew (A) slightly by using the Fig. Mt 222. TENSION ADJUSTMENT FOR REV MOTOR, TIMING BELT tuipment Required) Fan Type Tension Gauge (VFK62) (Specification) 228 +- 289 1. Loosen @ screw (C)_by using the screwdriver. 2. Set the Fan Type Tension Gauge to the direction indicated by arrow (D) as shown in Fig. M2 3. Tighten a screw (C) when the reading of the Fan Type Tension Gauge becomes within 225 +- 25g,TIMING BELT PULLEY TENSION BELT PULLEY (a) UNIT Screw (C) REV CLUTCH Fig. M2 223, POSITION ADJUSTMENT OF TENSION POST (Equipment Required) Tension Post Adjustment Plate (VFK0387) Hex. Wrench : 2mm (Hex Wrench Set : VFK0326) 1. Disconnect the AC plug 2 Remove the cassette compartment and disconnect the flexible (Flat) cable from P1508 3. Turn the Capstan Motor to the clockwise. while tha change lever is being pushed until” tho loading is completed as shown in Fig. M3 CHANGE LEVER CENTRE PULLEY 4. Place the Adjustment Plate and insert the hex wrench into the hole of Tension Band Fastener fs shown in Fig. Md. 5. Adjust the hole of Tension Band Fastener by using the hex wrench so that the Tension Post just touches the fixture of Adjustment Plate. 6. After the Adjustment, turn the Capstan Motor until the unloading is completed Tension Post just touches the Fiture TENSION POST HOLE OF TENSION BAND. FASTENER, Fig. Ma Note: hen you assemble cassette compartment,refer to item "23-13 Reinstallation of | ‘Cassette Compartment, 224, MEASUREMENT AND ADJUSTMENT OF BACK TENSION {Eaulement Required) Back Tension Meter (Tentelometer or VFKO132) VHS Cassette Tape (180 minutes tape) (Specification) _-22.8-27.5g 1. Playback the cassette tape from the beginning ‘and wait until the tape movement get the stabilization, (for approx. 10~20_ seconds) 2, Insert the Back Tension Meter into the path of 8 tape, and measure the back tension to be within specification as shown in Fig, MB. Probes of Gauge r Fig. M3 Fig. M5. Measurement of Back TensionNote: 1. While 3. If it is measuring, make sure that the three probes of the meter are all in good contact with the tape, 2. As the tension meter is very sensitive, we recommend taking 3 separate readings. out of specification, change the spring notch as shown in Fig, M6. 4. Measure the meter indication of top surface of reel ‘table as shown in Fig. M8. And. then perform the same measurement and confirmation Tor the other reel table. [ — vFKo190 VFKO191 _| Fig. M8 Adjustment of Reel Table Height-(2) N Reel Table 5. If the difference is more than 0.2mm higher or (Equipment Required) Post Adjustment Plate Reel Table Height Gauge (VFKO190) (Specification) (VFKOI91) 0~0.2mm 1 2 3 Romove the cassette compartment. Place the Post Adjustment Plate tables Place the Reel Tablo Height Gauge on the plate so that tho scraper of the gauge touches” the cut-out portion of the plate, then set the gauge to zero “0” as shown in Fig, M7. on the real CLL, eso iy, VEKO191 Fig. M7 Adjustment of Reel Table Height-(1) lower, “replace the poly~slider washer located under’ the “reel table with ‘one of the appropriate thickness.Reel washers” are available in thickness of 0.2mm, 0.8mm and 0.5mm. CHANGE THE SPRING NOTCH ji Washer Part No. Fig. MB 02mm vMx1738 03mm vxt299 5mm vMxti74 225, HEIGHT ADJUSTMENT OF THE REEL TABLES Fig. Mo 228, ADJUSTMENT OF THE CAPSTAN THRUST. GAP ———————__ (Equipment Required) Reel Table Height Gauge (VFKO190) Haight Adjustment Jig | (VFK0344) (Specification) 0.5 ~ 0.85mm 1. Turn @ Thrust Adjust Screw slightly until the capstan rotor unit just touches the coil of the capstan stator unit, THRUST ADJUST2. Set_the height adjustment Jig on the capstan Rotor unit, 3. Place the ‘height gauge on the bottom case unit and set the height gauge to zro "0". HEIGHT GAUGE HEIGHT ADJ. JIG Fig. M11 4, Adjust a Thrust Adjust Screw so that the thrust gap becomes 0.5 ~ 0.65mm, HEIGHT GAUGE HEIGHT ADJ. JIG ROTOR 05+006mm C&) tHRusr anuust screw Fig. M12 221. HEIGHT ADJUSTMENT OF TAPE GUIDE POST (P2 AND P3) (Equipment Required) Post Adjustment Plate (VFKO191) Reel Table Height Gauge (VFK0190) Post Adjustment Screwdriver (VFK0328) Remove the cassette compartment, 2 Place ‘the Post Adjustment Plate over the ral tables, Confirm that the Post Adjustment Plate is firmly seated as shown in Fig. M13, VFKO191 Fig. M13, 3. Lower, 2 tape guide posts (P2 and P3) by turning the Post Adjustment screwdriver so thet the condition of height becomes as shown in Fig. M14. That is, the lower edge of Tape guide shouid be lower than surface of Adjustment Plate. vFKo329 > Height Gauge Scraper vEKo191 \ Thishox screws = fortilt adjustment of post. Therefore, don't adjust for height adjustment. Fig. M144. Place the sorsper of Reel Table Height Gauge as shown in Fig. M15 Set the gauge to zero, then slowly until the lower tape guide just touches the bottom of the scraper, Use the gauge to determine the exact point at which the Tower tape guide touches the scraper Ul, AA raise the post Post Scraper [No Good} (Good) Fig. M15, Note After the adjustment, install the cassette compartment — referring the item 23-13 Rinstallation of cassette compartment 224, HEIGHT ADJUSTMENT OF THE PULLOUT POST (P5 POST) (Equipment Required) Post Adjustment Plate (VFKO191) Feel Table Height Gauge (VFK0190) Nut Driver (Purchase locally) (Specification) 0.06 +~ 0.01mm Note: Unless the replacement or adjustment of this post is required, the adjustment nut should ot be turned. 1. Remove the cassette compartment 2. Place the Post Adjustment Plate over the reel tebles 3. Turn” the Capstan Motor to counterclockwise (loading " direction) until the. mechanical condition becomes as shown in Fig. M16 4. Place the Reel Table Height Gauge on the Post Adjustment Plate and set the gauge to zero "0" 8 shown in Fig, M17. Height Gauge ‘Set Height Gauge to zer0 "0" vEKo191 Fig. M17 5. Place the Reel Table Height Gauge as shown in Fig. M18 and turn the nut slowly until the gauge reads —0,06 +~ 0.01mm. a Height Gauge Pull Out Post ° Nut | 4 VFKO1e1 Fig. Mig 6. After the adjustment, install the cassette compartment. (Refer to'2-3-13 Ri Cassette Compartment). 7. Play back a normal cassette tape and make sure ‘that the edges of the tape are not curling at the bottom or top end of the posts PI P4 and pull out post as shown in Fig, stallation ofPostP1 Post P2,P3_—Post Pa font AaB Tape Pull Out Post [-Tave L—tape | fe —tape G C (Ne Good} (G00) _ ig. M20 8. If curling appears, readjusts each post(except Tilt Adjustment of A/C Head Height Adjustment of A/C Head. Azimuth Adjustment of A/C Head Horizontal Position of A/C Head, pomp Perfect, repeat the above procedures from A to E (Equipment. Required) Alignment Tape (VFJ8125H3F) Post Adjustment Screwdriver (VFK0329) (by pressing the tracking (+) and (~) butt simultaneously) | ‘And, connect’ the oscilloscope to the output the Head Amp as shown in Fig.M22. Note: switching pulse as a triggering signal shown in Fig.M22. Head Amp HEAD fame Head nae po Cutt Piet Ea [xec|,_fnean- ee Confirmation end Adjustment of P2 and P3 Posts. If the Tape Interchangeability Adjustment is_ not ‘A. Confirmation and Adjustment of P2 and P3 Posts 1. Sat the tracking control into. the fix position. con of To got a stable waveform of the Head Amp output on the oscilloscope, use the head as a Video Pubs) ft Heed | wy 229, TAPE INTERCHANGEABILITY ADJUSTMENT | EAC Jame: Video CAUTIONS J] Fhe Mako @ Adjustment Mods as shown in Fig.M21 * (Connect a Cut Jumper. Wire.) SW Fulecrea0on ——— Sie “Connect a Cut Jumper Wire” { Foil Side Main C.B.A.—*] Oblong Hole. Cut Jumper Wire 1cB00t Fig. M21 Adjustment Mods Note: Proceed the following _ procedures nterchangeability Adjustment Correctly and Smoothly. to | Head SW Pulse | / (5 6 leds oil 77 cHoPwoae\ | | | Siggertoche } Head Amp Output | | AF signa | (73001) Head SW Pulse 25H ‘T2000 Fig. M22 Connection of Oscitloscope for Tape do it3. If the RE envelope appears like example “A” or 'B* in Fig.M23° then adjustment of the taps guide post (P2:Entrance) is necessary. 4. Adjust the tape guide post (P2) with the post adjustment screwdriver so that the RF envelope waveform at_the entrance portion becomes. flat, es shown in Fig.M23~"C". Fig. M23, 5 If the RE envelope appoars like example “D" or “E* in Fig.M24° then adjustment of the tape guide post (P3:Exit) is necessary 8. Adjust the "tape, guide “post. (P3) in tho came manner as the P2 post so that the oxit portion becomes flat as shown in Fig.M24—"F" 1 Exit Portion TM T Fe | mon IM Fig. M24 7. Turn the Tracking VR fully clockwise and counter clockwise. (Keop pressing + button or ~ button) The output envelope should vary. nearly Parallel with other condition as shown in Fig.M25, 8. Set" the tracking control into centre _ fix position and adjust for maximum RF envelope. If the RF envelope does. not mest these specifications, VI/V>=9.7, "V2/V>=0.8 (Refer to Fig.M27) ‘then repeat’ stops 18 again, ‘Output envelope Mini | > I Best Output envelope Max. (Fix position) mh ood | Good Fig. M25 Fig. M26 Loading of Posts viveor vavE0s Fig. M27. Spec. of Envelope Figure 8. TILT ADJUSTMENT OF A/C HEAD Note. This procedure should be performed after replacing the A/C HEAD and pressure roller. Playback the beginning portion of bienk case tape and confirm that the tape runs between lower and upper limiter of P4 post. If there is waving or in the lower edge or top edge of the tape, correct the tilt of the A/C head by turning ‘the screw (8) located behind the A/C head. Serew (8) :D. AZIMUTH ADJUSTMENT OF A/C HEAD Condition of tape Condition of | Turing Direction | Note Running (4) A/GHead for Correction ‘This procedure should be performed only when the A/C. Head is replaced and posts height are readjusted Equipment Required CO Alignment Tape (VFJ8125H3F) 1. Connact the oscilloscope to the audio output on Screw (@) the rear pane) 2. Play beck the 2nd portion (Normal Audio 6KH2) Of the alignment tape (PAL:VFB125H3F) 3. Adjust the 'serew (B) so. that. the output level becomes ‘maximum | AUDIO OUTPUT TT 1 Fig. M29 Nyy yy | 1 Vi\]| () |p Meseur \} Note UAL ‘After Tilt adjustment of A/C head, height, eee adjustment of A/C head is required ©, HEIGHT ADJUSTMENT OF A/C HEAD Note. This procedure should be performed only when the A/C Head is replaced. Equipment Required Check Light (VFK0343) Nut Driver (Purchase locally) With the tape running, look et the lower edge of the control head by. using the check light’ and check if the lower edge of tape runs along the Tower edge of the control head. . If it doesn’t, slightly turn’ the mut (C) behind the A/C Head (Fig.M30) to either lower or raise the A/C Head so that the tape runs along the lower edge of the control head, Turn the nut (C) clockwise to lower the head, and counterclockwise to raise it. Fig, M3t HORIZONTAL PO TION ADJUSTMENT OF A/C HEAD Note: This procedure should be performed only when the A/C head is replaced, and after performing the tape interchangeability adjustment. Equipment Required: H-Position Adjustment Screwdriver (VFK0328) Alignment Tape (VFJ8125H3F) 1. Set the tracking control to cantre fix position, 2. Connect! the oscilloscope to the output of Head Amp. (Refer to Fig.M22) Horizontal Position Screw Fig. M30 Fig. 32as levers, gears, rollers and so on 4. Play beck the alignment tape (PAL: VFJ8125H3F), 4 Adee tas Mubrsontt Bosiclon Sven of ac = 28 ASSEMBLY AND head so thar the FF signal becomes” maximum ADJUSTMENT PROCEDURES Ie OF MECHANISM Meta OupaRF Sane) The mechanism is mostly engaged 0 _ tho ii mM 7 Systemcontrol Circuit, through the mode select Hi switen ATT cc i a ee | | il — switch andthe cam gear decides all further pil | | city Truckanical” movement of ‘the. mechanical parts. such itl aac nan M33 If these’ parts are not fixed properly, the unit will be unloaded or compulsorily stopped. And it will result being damaged at any mechanical or electrical parts. (ADJUSTMENT MODE) STOP MODE DETENT ARM, SUB CAM GEAR, PINCH SPEED DOWN GEAR, MAIN CAM GEAR THROUGH HOLES THROUGH HOLES RING GEAR SECTOR GEAR LOADING GEAR (1) LOADING CAM GEAR a LOADING GEAR (S) Fig. Al Bottom View of Overall Mechanical Condition 2-12The overall mechanical condition (alignment) of bottom and top view are shown in Fig. Al and Fig, 42. This mechanical adjustment is Performed in STOP’ mode. The detail of described later mechanical condition willbe MODE SELECT ‘SWITCH PINCH SPEED DOWN GEAR Fig. A2 Top View of Overall Mechanical Condition 2341. ASSEMBLY PROCEDURES OF RING GEAR, SUB CAM GEAR AND DETENT ARM 1. Install the Ring Gear so that the hole of Ring Gear is exactly in line with the hole of chassis as shown Fig. A3. Install the Sub Cam Gear so that the hole of Sub Cam Gear is exactly in line with the hole Of chassis, at the same time, the small hole 282, ASSEMBLY PROCEDURES OF MAIN CAM GEAR AND PINCH SPEED DOWN GEAR. 1. Install, the Pinch Speed Down Gear from top side of chassis. 2. Install the Main Cam Gear on to the Sub Cam Gear so that the small hole of Main Cam Gear is exactly inline with the smell hole of Pinch Speed Down Gear, And the large hole of Main Cam Gear is exactly in line with the large hole of Sub Cam Gear as shown in Fig. Ad PINCH SPEED DOWN. GEAR. SMALL MAIN CAM GEAR }-— THROUGH HOLE | zmnjam-—MAINCAM GEAR | mama! maz+—SUB CAM GEAR TTTTRITT-~—~cHnssis — Fig. Ad 238, ASSEMBLY PROCEDURES OF LOADING CAM GEAR AND RETAINER GEAR 41, Install the Loading cam Gear so that the end of Sub Loading Arm comes. t rift. (A) of {located just outside of large hola) "of Sub Loading Cam Gear as shown ‘in fig. AB Cam Goer is exactly. in. tine ‘with. the hole of Rotate tho Installed Loading Cam” Gear so. that Ring Gear. small hele on Loading Cam Gear comes to erourd 3, Install the Detent Arm. contre of Ring Gear as shown in Fig AG ~ CAPSTAN LOADING CAM GEAR MOTOR \ wort / | mrovan rirT (ay HOLE | SMALL AOLE (LARGE HOLE) sue Loapi Ws ~ HoLe DING ARM | THROUGH | HOLE j [RING GEAR ARM GEAR Fig. Ag bag Fig, AS —_— [ CAPSTAN MOTOR, WF Lo HOLE ~Lopons Foi MAIN cAM— ~ GEAR GEAR RING GEAR,2. Install the Retainer Gear on to the Ring Gear 0 that the hola of Retainer Gear is exactly in line “with the hole of Main Cam Gear,at ‘this, time,this hole of Retainer Gear also is exactly in fine with the hole of Ring Gear(underneath) At the same time,another hole of Retainer Gear is exactly in line with the hole of Loading Cam. Gear as shown in Fig, A7 % Moron ~~" THROUGH HOLE SS LOADING CAM GEAR RETAINER, THROUGH | on HOLE senjam-—— RETAINER GEAR "ma \azm~— RING GEAR — chassis MAIN CAM GEAR Fig. A7 2.34. ASSEMBLY PROCEDURES OF CENTRE GEAR 1. Install the Centre Gear on to the Retait Gear so that the hols of Center Gear is exactly in line with ‘the hole of ‘Retainer Geer, at this. time, “another hole of Center Gear Is exactly in fine with the small hole of Clutsh’ Disk. then insert the cut washer. CENTRE CAPSTAN GEAR MOTOR CUT WASHER THROUGH HOLE HOLE (COENTRE PULLEY centre cuyren Gat Frmouan RETAINER zal adfOCE RETANER ‘emt — GEAR ones Fig, AS 2-4 235, ASSEMBLY PROCEDURES OF MAIN LEVER () UNIT AND CAM FOLLOWER ARM UNIT 1. Install the Main Lever (1) Unit and then insert the cut washers and hitches the spring as shown in Fig, AQ. MAIN CAM CUT WASHERS GEAR MAIN LEVER (1) UNIT Fig. Ag install the Cam Follower Arm Unit so that the pin of Cam Follower Arm insert to the groove of Main Cam Gear then insert a retaining ring CAM FOLLOWER ARM Fig. A10286, ASSEMBLY PROCEDURES OF LOADING - GEAR (1), LOADING GEAR (S), SECTOR GEAR, TENSION ROLLER UNIT AND OS aaa SS BRAKE ARM UNIT TENSION 1, Set. the P2 and P3_ posts to unloading RELEASE position, then install the Loading Gear (T) | CLUTCH and (S} so that the hole of Loading Gear (T) UNIT ig exagty inline with the hole of “Loading ear (8). 2. Install” the Sector Gear so thet the hole of TENSION Sector Gear is exactly in line with the RELEASE projection mark of Loading Geer (T). Then LEVER insert the retaining rings. REV 3. Install the Tension Roller Unit and SS Brake MOTOR Unit, then tighten the screws TIMING SE BELT PETA) REV ARM UNIT SSBRAKEUNIT RING LOADING GEAR (7) Fig. A12 24-8. ASSEMBLY PROCEDURES OF SUB LEVER CAM, SUB CAM FOLLOWER AND REV CONTROL LEVER 1. Install the SUB LEVER CAM RUBBER STOPPER, SUB CAM FOLLOWER and washar as shown below. S-—wasier ‘SUB CAM FOLLOWER TENSION ROLLER UNIT PROJECTION MARK Fig. Att 23-7. ASSEMBLY PROCEDURES OF REV ARM UNIT, REV CLUTCH UNIT, TENSION RELEASE LEVER AND TENSION RELEASE CLUTCH UNIT 1. Install the Rev arm unit and Rev clutch unit. 2. Hitch the Rev motor timing belt to Rev clutch unit. 3. Install the Tension Release Lover unit and Tension Release clutch unit2. Install the Review Control Lever 9 shown below REVIEW | CONTROL. | LEVER Fig. Ata 23.9, ASSEMBLY PROCEDURES OF TENSION PULLEY BASE (A) UNIT 1, Install the Tension Pulley Base (A) unit as shown below, 2. Hitch the Rev Motor Timing belt. (Refer to 2-2-2. Tension Adjustment For Rev Motor Timing Beit) q TENSION PULLEY BASE (A) UNIT -16 23:10, ASSEMBLY PROCEDURES OF CONNECTION GEAR Note: Before this assembling, Sub Cam Gear position (and positions of bottom sida gears) must be in correct positions as described before. Install ‘the connection gear so that the smell hole of connection gear is exactly in line with ‘the small hole of Sub Cam Gear as shown in Fig. Ale,23-11, ASSEMBLY PROCEDURES OF MODE SELECT SWITCH AND P5 PULL OUT SECTOR GEAR 1. Install the Mode Select Switch and tighten a serew, then solder the 5 soldering portions. Install the P5 Pull Out Sector Gear so that the hole of PS Pull Out. Sector Guar is exactly in line with the tip of edge at PS gear as shown in Fig. A17. 2 PS PULL OUT ‘SECTOR GEAR MODE SELECT switch / SOLDERING PORTIONS Fig. AIT 23:12, ASSEMBLY PROCEDURES OF PINCH CAM AND PRESSURE ROLLER UNIT Instali_the Pinch Cam so that the edge of PS Arm comes into the Rift of Pinch Cam and Projection of Pinch Cam is exactly in line with the hole of Pinch Speed Down Gear, at this time, the hole of Mode Select Switch is exactly. in_line with the hole of Pinch Cam as shown in Fig. At8, Install the Pressure the Pinch Cam Cap. Roller Unit, then install 29:13, REINSTALLATION OF CASSETTE COMPARTMENT FROM STOP 1 POSITION (HALFLOADING) When reinstall the cassette _compartment,the position adjustment (alignment) of mechanism is necessary for correct working as follows: 1. Set the mechanism condition to STOP 1 position by means of turning capstan motor as follows. capstan motor as follows: (1) Release the Change Lever by pushing it to arrow mark direction as shown in Fig.A20. (2) Turn the capstan motor to clockwise until the Clutch Disk is locked. (Clutch Disk is locked’ onece in its one rotation) (3) 4) Release the Chenge Lever again when Clutch Disk has been locked Repeat item (1) or (3) until mechanism comes to STOP 1 position as shown in Fig.A19, To confirm the Stop! position(Gll m: Press the Sub Cam Follower, ianism) to arrow. mark direction as shown in Fig.A20 and turn the capstan motor to both of forward and reverse direction, If takeup reel table is rotated when capstan is rotated to clockwise and if supply reel table is rotated when capstan is rotated to counter clockwise,that is Stop! position, PINCH CAM PRESSURE ROLLER UNIT ‘SELECT ‘SWITCH SUB LOADING Fig. A19 STOP 1 ConditionLOCKWISE REV, MOTOR TIMING BELT Worm weeeL A BEARINGUNIT © TENSION PULLEY BASE (aun TIMING BELT yp KS Z| 9 ©)j), 3 ie: ) Hay ef cenTRE PULLEY = Pt susteven PREVIEW CONTROL LEVER a TENSION RELEASE CLUTCH UT | | SUB CAM FOLLOWER, Fig. A20 Bottom Viow of GIl Mechanism ke the cassette Holder unit out es shown in 2. Remove the 2 screws (A) as shown in Fig.A2t 4, Tal Fig.A22, 3. Take the top plate out, | Cassette Holder unit TOP PLATE SCREWS (A) Fig. A22 Removal of Cassette Holder Unit5. Prass the sub wipor arm (R) to direction indicated by arrow so that the sub wiper arm comes to_cassette down position completely as shown in Fig.A23 and keep It ‘Sub Wiper Arm (R) Fig. A23 6. Reinstall the cassette compart: (without Cassette Holder) to chassis so that the first ip of Rack Gear A (1) comes to Marking Slot of Connection Gear es shown in Fig.A24 RACK GEAR A (1) MARKING FIRST TIP MARKING POSITION IS IN LINE WITH FIRST TIP OF RACK GEAR A (1) 7. Tighton the 4 screws (D) as shown in Fig.A25, Servicing Fixtures & Tools VPJSI25H3F PAL VHS Alignment Tape | VFKOI9L ‘Tension Post Adj. Plate Post Adjustment Plate | yrKogs7 | VPKOII2 Back Tension Meter ‘VPFK0335 (Tentelometer, Made in U.S.A) Fig, A25 & Repeat pressing the change lever and turn the capstan motor to counter clockwise until mechanism is placed to Eject position 9. Reinstall the cassette holder unit as just the reverse way of item 4,Fig.A22 10.Reinstall the top plate es just the reverse way of item 3,Fig.AZt <= Retaining Ring Remover Gnm4mm) /VFK0328 H-Position Adj. Screwdriver Reel Table Height Gauge VPKO383 Check Light | VFK0326 Hex. Wrench Set | VFK0190 07,09,12,15, | (te e.24. Sam VPK0329 Post Adjustment | VFKO344 Height Adjustment Jig | VFK62 Fan Type Tension Gauge Screwdriver VFKOM1 Upper Cylinder Remover Jig | VFK2T MOR265 Morlytone Grease Head Cleaning StickLOCATION OF TEST POINTS & CONTROLS MAINC BA AW VR2O1T VF vRo019k & A A VR2018 eateaar e se °. TP2026 T2015, P2002 TP. e P80 1 A ree racos vRapi3 P2031 [PG SHIFTER] yRaooe a °¢ A vra012 TP GNO P2001 P4002 # Ppa e1P4003, DDR SECAM PACK C.B.A. LUMINANCE & CHROMINANCE PACK C.B.A. NTSC RECORDING PACK C.B.A. vrso10 NTSC p.Bc|* Y, BALANCE VOT a HEAD AMP C.B.A. TIMER C.B.A. Tat a see VR502_ VR501_~——«TP507 REC C] [REC Y] TP7501 . 7501 TIMER CLOCK 1P7501 e INPUT/OUTPUT PACK C BA OPERATION C B.A R209 & aVR2010 V-Lock] [¥-LOCK PAL NTSC ‘vR3004 & PICTURE CIRCUIT BOARD LAYOUT MAIN C.B.A- TV DEMODULATOR PACK 6.B.A. MULTI DECODER PACK C.B.A. KARAOKE PACK C.B.A—— SUB SYSTEM CONTROL—4 PACK C.B.A. INPUTIOUTPUT PACK C.B.A. NTSC RECORDING PACK C.B.A. LUMINANCE & CHROMINANCE- PACK C.B.A. POWER C.B.A. DDR SECAM PACK C.B.A- HEAD AMP C.B.A. MIC JACK C.B.A- OPERATION C.B.A-2-4, ELECTRICAL ADJUSTMENT PROCEDURES This section provides completo _ electrical adjustment procedures which may be required for electronic circuits of + VHS Video Cassette Recorder. 2-4-1. TEST EQUIPMENTS To perform the electrical adjustments completely, following equipments are required. 1. VTVM (Vacuum Tube Volt Meter) and DVM. (Digital Voit Meter) Voltage Range: 0.001~50V 2. Dual=Trace Oscilloscope Voltage range: 0.005~50V/div, Frequency Range: DC~30MHz Probes: 10:1 Frequency counter Frequency Range: 0~10MHz Signal Generator (Sinewave) Frequency Range: 0~S00KH2 Video Sweep Generator Frequency Range: 0~10MH2 Colour Monitor TV Plastic Tip Driver VHS Alignment Tape (VFJ8125H3F) Pattern Generator 2-4-2. HOW TO READ THE ADJUSTMENT PROCEDURES DELAY MODE TP2010 kT P2002 (CONNECTION TP2010 (TRIGGER POINT OF Ak“ 7(TRIGGER) AFC FREE RUN 1. Adjust 7851. so. that the portion “A” becomes maximum waveform 7 ADI. Mooe | INPUT —_____ e ; SINEWAVE Icot-e | vraos | stop | SINEWavE TAPE wE0. SPEC. |FREQUENC’ ICOUNTER/ BIGNAL, 15736+~100H2 eENERA- [rorNORMAL AUDIO Section 2-414. AUDIO BIAS CURRENT ADJUSTMENT To ean [aera | 7b4e03 [3] vrdooz [RECORDING TAPE MEQ. SPEC. Drees V.T.V.M. 2.44-0.1. (mVrms) 1. Connect the V.T.V.M. to TP4002 (+) and TP4003 (). (Do not use long cable for Connection) 2. Make a short circuit between terminal of audio input and GND. 3. Place the Unit in Recording Mode. 4. Adjust VR4002_ so that “reading of V.T.V.M. becomes 2.40.1 (mVrms} TIMER Section 2-418. TIMER REFERENCE CLOCK ADJUSTMENT i ‘ADJ. move | __ INPUT P7501 7501 STOP TAPE MEQ. SPEC. FREQUEN ” CoO TENCY| | 7812.54-0.016 (usec) 1. Connect the frequency counter to TP7601 2. Adjust C7501 so that the reading "of the frequency counter is 7812,5+-0.015 usec,SECTION 3 BLOCK DIAGRAMS & SCHEMATIC DIAGRAMS 3-1 SYSTEM CONTROL & SERVO BLOCK DIAGRAM 255 CAPSTAN SERVO SPEED LOOP © <—ICAPSTAN SERVO PHASE LOOP 4852 CYLINDER SERVO SPEED ]ASE LOOP 484 CYLINDER SERVO SPEED LOOP oow wr tetule fev gu [12345678 ves ome 7 COMPARTOR a fo wy ve |L_ to WER e]ia UBSe05sre0 <5 MAIN SIGNAL PATH IN <=MAIN SIGNAL PATH IN G5 MAIN SIGNAL PATH IN <0 MAIN SIGNAL PATH IN #0 5.06MHz PHASE ROTA emer LeveL (NJM4558D) (NJM4558D) 1C4352 (F AUDIO SIGNAL 1S_NOT SUPPLIED TO PINS,\ 100msec i 29 " ctor (easr7) a ! z PEE ANETOT | +o wager" | : egos HIS PULSE 1S USED FOR E4382, cxes (es She Sommaonon) (Pane [PKA202 ‘2KHE OF HIGH (NJM4558D) : y Bele nose agree rue A) NONO-MULTT ean ' ' 1 104354 (MN3102) te4305-3 ® we @ aera (oar) \eeane namciio 104857 “on ‘s0QHz MP 2 viss. . LPF a GENERATOR (uPD40118G) — lE KARAOKE MUTING SEARCH SYSTEM We eee ee : - ‘50~200Hz FREQUENCY BAND ON xz PLAYBAGK MODE, I ‘SERVO [viss) + mean Pe ele aah 3-12 KARAOKE Section Next Page: ‘TV DEMODU. & MULTI Section3-4 TV DEMODULATOR & MULTI DECODER BLOCK DIAGRAM @@3 VIDEO SIGNAL PATH 6B AUDIO SIGNAL PATH PICTURE SIG. SOUND SIG. 1c ten on si V 3.52 (Ree RF CONVERTER = ~\ 10701 (H513665P) b ‘ 6. 0MHz xm10 SAY, RF IN Se FILTER F our c7es2~c7664 fren RIGA wne 107652 LPF. 6. SMHz (AN5043) . ee PM VIDEO SIGNAL LIMITER LH eT AUDIO SIGNAL ; DAC om BUFFER = From TIMER BAND VL Po BAND U >—- TV SYSTEM > ee >—t FROM OPERATION ea C702 (wPC1167C2) R717 x72 m2, BP 1a | MATCHING vR753 6.0 TRANSFORMER 8 10703 MULTI DECODER PACK C.B.A. (uPD40668C) 3-4 3-1556 AUDIO SIGNAL PATH TV DEMODULATOR PACK C.8.A. TUNER ve XT 741 aa 1C701(451366SP) xno i ‘SAW *" 703 oe 1st asp EY zn ane FILTER FAK 0 Fi SFFER ie Min Lomtnance CHROMINANCE 1703 SIF DET veo xe ve 6,5 1704 Tae a > ~ vei i Siee teed am BUFFER = a 1P706 TT FAK 22 702 (uPC1167C2) 3 ; f wo{ vom noI >> [oro (wPD40668C) @ sb 3-163-5 POWER BLOCK DIAGRAM C1102 (STK5391) (MULTI VOLTAGE REGULATOR) put > usREG 14 T1101 Ac PLUS Fi101 Litor.Ltto2 1102 1108 Lol pas TY LINE FULL WAVE mm HU unnes soy oa FILTER RECTIFIER Rig R125 BLEED, ane RESISTOR oe arto2 neta Dt RES. et 2 now sv sav 101101 c1109 [+ (STRD6008x) cinta ® STARTER TRI (SWITCHING TR) Ar ONO [x orone m |e - a Q) (CONSTANT. VOLTAGE (anrneg vorse) geci21 out bt FLD es sy cree 1106 R1108 Ay onnte a PLOY vearerss i artoe | PITT (aeager yD NOt exten cn. TR) (oyeorgase cr. TR o1107 7 SMOOTHING AND aT (— RECTIFICATION 7 NON S¥ 5.3¥ B 1C1103 i (SE013E) t L PHOUY es 12.9v RINI0 C1115 — art03 3-17 3—183-6. POWER CB A (VEP01420M) ‘arson =a are | es aro | a3 ano | 83 Tetograted Cll venir aa tone | ks ices | ea Prior ra A FN01 . # P1102 A aa AC INCET 1 ® — A RII01 1106 Lino2 AN ae Ri102 F D1109 i 1 Ft Back Page: POWER Section 3-19 3-263-7 POWER SCHEMATIC DIAGRAM 4 mio 4 Wabtee ° 8, gs 32 of By 38 35 53 ia a4 4 fcriesTaul ie nce weeks ath a ste Zt 5 ens 1 By ax S “siwerco Reker aT0P: a8 38 3 1 1M "AUTO VOLTAGE pore q reek Sees | eer t > 7 | ey yes cul 25itn0 . x08 ae 1200 : a wean use A ~ etMeozste on s ‘STRDGOO9E J a7oP a Tf A ™ caize sovee ye cin ae ‘ever A Staae j ous | | 1 me | | oor 7 oo T B e135] ci30 2 act = Guat = Sze T EF? aaa z oun & WAVEFORMS OF 1CHOE e , eg tt 8 a a a — Be fave ah h 4 f r C2 JS | | [Ue 97 \r J Peale tae el | eusee. t0vpo] muses avo | inte. soo ruse. 0.6vpa co a ~e ” 19 ore: NOTE 1. WHEN MEASU! THE MEASURENENT MODE OF THE 0¢ VOLTAGE ON TAS DIAGRAM 1S STOP CDE. HE VOLTAGE OR WAVEFORM ON THE POWER TRANSFORMER CIRGUIT, SET THE GND TERMINAL OF PRIMARY SIDE Ionarts) MEASURING POINT AS FOLLOWS. NOTE: D0 NOT USE ANY PART NUMBER SHORN ON THIS SCHEMATIC O¥AGRAM FOR (ORDERING, WHEN YOU ORDER A PART, PLEASE REFER TO PARTS IST, IMPORTANT SAFETY NOTICE: SECONDARY SIDE... TP GND OF MAIN CB. NOTE 2. THE OG VOLTAGE INDICATED IN PRIMARY SIDE iS SHOWN THE VOLTAGE WHEN INPUT AC IS 240 ‘courowe Toaran om FET AEN REPADNG ANY OF THES THe SPECFED PATS, 1p BY Tae Sion AN HAVE SPECIN, CHARACTERISTICS IFORENTS, USE ORLYPOWER Section ier102 STK5291 <4 mod Wiveee 8 g Ss ef ES Ey 52 £8 aeons cae ss_ossoe, 4 crio9 «0a Tt f pt x, ara 002 chia? By “sino ‘age es sort BBie || i AITO WOOGE T 7 (Gelscron™**)] | let 4 ane 2] { 8) | ino (ro srsremert 8) | lpdoss | puto a sem} + |—|——sfi] ms SY fra | eters fpome2 | 3] POWER oFF-@)Tpenes + - Late tay ]oo08 + sige 00 s] nes 12.37 [e006 ei. EL ROTOR GRO Jpetne 6 guoe A TI - 7] WON SW 5.37 | pe002- 7 Sabeoone { oR SY [peoez 8 an ie | s[_ a ——]rewna eae 01107 cue | ol “0 ——Tpsooa 0 (outage crt) s0veee | f fs “Ieee 257 —reana 31 * lal vearea co) [peoea-tz 5 — fi]_feareR c=) [e002-19 A | oes Siu Sooek cual cus] | 7 __—§ oot 7 ot cui35] caso ‘24 8 tie 3 aso1330 FORMS OF lemon ifee : rears AN aa case HARTA rr PYWUAY - Ui u sec. Loven t2ySes.1svo0 | 1480s, soove9 “ANT SAFETY NOTICE: IIs eT y Te ion A wave SPci. CHARACTERISTICS SAFETY WE PLACING AY OF THESE COMPONENTS, USE GHLY Next Page: 3—22 3—23 SUB SYSTEM CONTROL Section,38 SUB SYSTEM CONTROL PACK SCHEMATIC DIAGRAM 604 '8 ee yee 22 2198 ors BS = 8 % B68 4 2093 sta 22a 25 Saad IN Bt z 3 a osha Mise 33 @ ao ageg Sem aor 8888 Tamme, 2525 —— |e soe% —==—|o ged Sou =n 2223 Ta foeneo. SEES Bea's, e338 owe 8588 S232 Tews —]e0 gege Teeows je | SESE sais zee oe # @_ L015 TH ]os0 nt a |eo Samy |e» Tue |2+ lose S| 0) aes |er =. - 7] © 3 —|tsno 23 | fe moore sz 22 fears 2 Se se] 05 ge ORE a2 t$— 0 — TB Wiss ob Bs a] cose id se Bo fe sa | | ) 4 sl, | 32 aoa gost ge ie a BE L 23 SE Ores we se S@Q2m0 Qe g 108 z = one, wor Be . oa co) 3 o a | (iorom9 Seg _—? = -—— =) ise 1as@) q 2007 98 om & sate = 7 SL@®esa vas) > 3k © oso ge tsa 1s) — UL f—___J 2 OH! 7 —@ssn oan) | # 3 ase PO eise omar 3—243-9. SUB SYSTEM CONTROL PACK C.B.A. (VEP06648C) ‘Sun SYSTEM CONTROL PACK CBA. Trnaaor a wa ene a Trantor & Resistor consoa [2 Inept Gout Tem ry tose Be ADDRESS INFORMATIONSYSTEM CONTROL & SERVO ICs DC VOLTAGE CHART (SP MODE) REFN, Tei Move Va [3 [ets Teqr{e stop [sa [ee [es | 0 | 50 [50 [aa [va pay [sa [se [se [0 | 50] so [so [tt Fe [sa [sa [ss] oso} so [sa [ta REF. icant wove V1 Ta Ts Ts Teves [s[elol[u[elaluyelely[e[e ls srop_[ea {-0s| es [a4 [ar [a0 [20 | 20 | eo | a [eo [or] aa fas pes fortes] o [actor payee fos {er [ia Tarfarfer[er[erlarfo |e [ae] se [ee [oa] ao fos [acl or Fra fer fez [sa] 20} aofer[er}2olaoto| oso }as [ae tee} aa tor [oelar REF. i Move a Ta | ae stor_[-oi[ os | 69 [as pay [0 [os | 24] a9 re [0 bes Les [aa moos 7a Ta [ats [eee Tle peqeye pepe te stop [2s [es [25 |-o | as fas [es [aa ertas}o [oo so] 0 | so par [ea [es [25 [0 | as tes [ae [aa es [ast oo [oso] o [so re [eetes [25] 0] 2s tas [ea tso zs testo fo tetsolo so REFN Tease Move [a Ts Te Ts Teq7ye stom |-24 [ae fas] oo ]o oso pay [esas eso] «| o [oes Fe [es [es }es|o|o}o [oso a Tease moe ia tatays[e]7[slstolule[e[ulele[ole STOP of oro fee [ar [aa [as Pu as | 40 [ao far [ae [ios faae | 0 PAY ai fea [0 [ae [as [es [eels [estas [oe testis [as os Tar FE efor fo Pes Par [es [eeu [as [oo [ao"bar [as faa pe 0 REFN e001 moos Ve [atsTste[s[slslol[u[ele[ulelele[ ele la stop_[-o | 0 [aa |solso}so [20 | 0] ofso[eotaelo fart olostartast oto par | o |e [os |so|so}sofao]o}ofaatsoto]o|o|o]estarfar [arto fe [0 fos tos as [sol sofeo] o |e |sofsole}ofofeles}ats torts BEF HO moe \"i [a Tala [ste [a talale late elu~e[=[7lelale ‘srop_['so_ [eo [ar[ee [is as tes [es | otasfeatzetaa]o | o|ofasfes|o | ae pay [so [so [ee [ea | o [aa loe [eal o | aspen | zeae las as] of es fee] o |e re [sa [eo [ee | aa [as] ae le [eat o fospeeteetaeto [oo festes| «| as Moe Va Tetelals[e[a[elelu|s|=]a|u[s[s[s [alae ‘sror_[es [sofia [ss] ofsoto [sot o}ofe{o] oto o|solso[so{so]ar pay [ea fas [ra [sa|o [soto [soto farfeoto oto] o | 4a] so [soso] aa fe [ea fsotes to |otsoto [est o}atotoloto[osolsotestsolo BEF NO ot moe [a [alale ts elele[nin[e[p[ulelel[a[e [ele stor [60 [ee fee tasto [oto fo, oo }ofer|o}so[so}ss} soto [soar play soo [as [as [soso }so|so|as}o | o[satsolo [sa] ae] so] [sof or fe —psofo fester] ofa fo}ofo}a}ofeatso}so[satas}soto [solar moos \a_ [| |e stor_[-o[— | — [as may |e [ =| = fee ee fo f= [= 80 REFNO, = noe \ 2 a stor as [soo Pay [4a [so | 0 a co EF HO, z moos Te Ts Tits tel7 epee n[elelule le ‘stores [so[so | 30 | os | so [ao] 0 [oa soos tea o [as] oso pay [os [so_[-so|-so [os [so [so] o[os] solos {sa | oso] oso rr. [os | o [so] so [os }so [solo los |so{or|as jos [ar | so] so REF HO a0 moe a2 Ts tats ~e[rye stop_| or [es [aa |-o [ast ae [ar [ae pay ar [ea [ae [0 [aa] 29 [or [an er [or [as [as] 0 [ast ao lor ae EF eas moe VT? Tata ptetel7[atetuin[a[e[ulele ‘stor_[ar [ra [vapas [as tas o[as ra} va tra | o [ae | soso [ao may Tas [es [estos tse [er{o [eater far [ar| era [soso] so re [as [ss [se tos tse tar|oleatertertar}o]rapso {so | soSYSTEM CONTROL & SERVO TRs DC VOLTAGE CHART (SP MODE) FEE_NG | afoeo 008 ase “ats 008 “aos juooe Ne To Te letcofstetc{sletce[alejelelelele stor [as [ar sa [iss tas [ae {oa [radon [0 [woe] 0 [eas [ee ua oe per peo] wun [a0 [ar [so Tra {94 [aa [03 [ras [es [ofa o [ae [aa] oe [se [os Tae] ee [aa [so [so fas tras [ae [oo |rasfor a [es|e [isefuefury se pert so FEF NO | Oscor “aos ‘25008 ‘018 ‘e017 26018 woe Ve Tc [steve Tatetctsletolslelcleleleye stor_[72 [vas | 77 [so [30 far tsr [ar] es [es [ oe tis poeta port = To may [ar faster [50 [50] srr fst [ sates los [is [oe tort = [so Fe. [ar [wastes {soso} sr [si ler [satestostistect ates Teepe FEF. NO | e20 ‘oat woos eT ¢ Te Tete [es srop_[o fo far} oturlo = pay [o fo far |e fas]o Fe [0 [oar] [ual o i i" REF. NO. ‘onasoe ‘onaate eo oon ‘onaei MODE Ble[cfstetctslelclsletelslelcls stop [so [ar Tos [ea fos {so [0 [aol [oo ao tao par psoas [oo eo pay [so [a2 fos {so tos [so] of aoto too ]solsrpartset ee} ao [eo ee [so [az [os {so [oa [solo [solo [0 [o]solsoparlsolaaten oo Per. NO | —onania soo ‘obeooe ‘Sao ‘oReobe ‘oneeos | move Veo [steve Tstefetslteiclatelclalelels [stor {as {ro | soo [0 fo Po [0 feo} astos tas [asporteotaet open pay Tas To [soto [solo fo [0 [soso tos aa [eo [oalas [ac] oes re [eo To [so [0 [solo [o |o [so [sotas]o [so] ores tect o [ea EF. WO,| hero ‘neo? ‘mec ‘neal ‘anio ‘oneait moe ee [a teteTstetctstetelstelelsjeye le stor {eo fost o fasfert [aol o [eo farl sfartart [estar] pay To tact o fo fusfer to [o [soto partite lasy oy oes par BEF. [~ —ofeava ‘onsore ‘oan ‘nena aco | Moor ec [a [ete letetepe eleTaleleps sror_[as [ao |o [0 tact oo [arto oboe faa 0 fo fas may [aa to [so] 0 [orto to] 0 [es ofa [ as |-o [0 faa Fe tas Taso |o tect o fo jaelo fos paste fo fo EF_NO [aoa ‘neon ‘onan ~ - woe \e [ec Taletelsteyce fstos_[o fo Pas [ooo [ao op ae Sj par [9 [o fss to | so} oso] 3 [aa ee To Tero te [solo ts0 [0 pas I3-10. SYSTEM CONTROL & SERVO SCHEMATIC DIAGRAM am CAPSTAN ] SERVO SPEED LOOP <= CAPSTAN SERVO PHASE LOOP <8 CYLINDER SERVO SPEED LOOP « a F e ° i anon | =e = 8 pose] Snimen oar eset A ee | Pineda 7 T z T 3 T + T 5 T 6 T 7 e T g T 0 T 7 T @ T 7 3—29 3—30LOOP 1 | 7 (ao ot —}vaddeeh— ae 1 | Oar neo | Se ee it | ; = | > : = ae a i | 35 f Sere iS = = f | =e 5 5 foe om zs at gues 4 6.0. c ae | cs on | eee au ame | af : arenes 7 ary it ~T"@ a aes i {= eos {4 B Soo Egy oe esene s — eeeeeeeneeee| —~ t | a ay Ea 6: wll Jaw tee "8 coe ole hovers Ly — $253 VIDEO MAIN SIGNAL PATH IN REC MODE ,,,,] a ee ees ls a 2™ AUDIO MAIN SIGNAL PATH IN REC MODE 1 aa: r ale sam nan ), <3 VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE fg al gr i a <0 AUDIO MAIN SIGNAL PATH IN PLAYBACK MODE. 7 NOTE: THE MEASUREVENT MODE OF THE OC VOLTAGE INTHE BRACKETS) ON THIS DIAGRAM IS RECORD MODE ” WTH PAL COLOUR SIGNAL. (SP MODE) THE MEASUREMENT MOD OFT OC VOLTAGE QUT OFTHE SRACKETS ON THIS OAGRAM 1 PLAYBACK MODE NOTE: 00 NOT us 1 HPAL COLOUR len, (SP MODE) RoERNG WHE OU EER AAR MEASE T T 2 T 3 T a T 5 T 6 T 3 T 70 3—343-12 LUMINANCE & CHROMINANCE PACK CBA (VEP03857Q) DDR SECAM PACK C.B.A, (VEP03452G) Se (aw) 3" aves TE Lee D BETIS TY gute cose tei NTSC RECORDING PACK C.B.A. (VI ATumnaNce cconawnanee PACK CBA Transistor car me 02 cs 03 6s cass or ss o sce cr ees be cso | be coo | ce cons |e aso | ce ams | ce ams | az oxo | Ar Tanase & Revisor ‘arr | ea oro | ba ores | es ore | ce corer | oc NTSC RECORDING PACK C-B.A. (VEP03858B) oraz | cz ones | ce = forene | Ga once | ke conics | 4 foneoor | ko fonwcce | ke itograted veut ro ee sco Bs east or teo0t Br teone a veest ba tooo |e ica | 6 ajsinent Test ba var | ke vans | Be vaso | co Gonna Peo [aa prem | ks pon | ka room| A? ADORESS INFORMATIONWAVEFORM OF LUMINANCE 1€302 (VEFH14D) & CHROMINANCE PACK PINS (SP MODE: PAL/NTSC) (SP MODE: PAL/NTSC) [ER] wave romw [PR] wave ronw [ER] wave ronu [EN] waveronw Pe pd eae | a = ite = ° of Ye a) OPP wpe. | | some | ee Be oo) OB, YY «| tot || tet an tn ze aa «(jl 7 1 [POE Ya fs] ot | | petra el a18Ve9: Pa fetes, eae as om ee aa oy te = tl i, a mt od ato Z an Imes] | sty = Le T a e = [88 \e z WAVEFORM OF NTSC RECORDING PACK PINS = ¥ "(ge || age | SEMODELEALTEG fe]85 MAIN SIGNAL PATH IN REC MODE (3 823 MAIN SIGNAL PATH IN REC MODE (PAL/4.43 NTSC) <50 MAIN SIGNAL PATH IN PLAYBACK M ——e- pa00i6 | NDB Pano 7 | REC CHROMA 7 |e paooi-6 | RF CROW [EL Fa0o18| Aa SH TE Poot 4 | RF tee P2003 | ENV, SELECT [3 ro0o1-2 | ¥E80 sv [2 >—— poor | ex. © i 281 (10 AUDIO) PaOOE 7 piace? | RCT o> —] 005 A Hoge paeee 8 2 1606648 31 48 28 25 St P4002 6 SO £ )y (0.3) (0.4) (0.3) (0) {0} (0) os oe % TPSO7 REC. ] B csi7| | cous | eo ly | ’ | 022Vp-9 | a ¢ t “tS =. soa (10 OfLINDER ORWE) | = Pao] id Tas 2901-14 — ti) 6 | mee — secs Eee) Hi 1200 1200 oo pasar 8 | =f reset 7 | peeot6 | TP ke A ie CC — - i aa ES - feats | se fh peste | ao} Low - pasoi-1 [sets fife a NOT: THe MEASUREMENT MOOE OFTHE VOLTAGE THE BRAOKETS (ON THIS IARAM 1 RECORD MODE NOTE: 00 NOT USE ANY PART NUMBER SHOWN ON THIS ‘SCHEMATIC DIAGRAM FOR ORDERING. WHEN YOU OROEA A PART, PLEASE REFER TO PARTS LIST. \WITH PAL COLOUR SIGNAL. (SP MODE) THE MEASUREMENT MODE OF THE 0C VOLTAGE OUT OF THE BRACKETS ON THIS DIAGRAM IS PLAYBACK MODE WITH PAL COLOUR SIGNAL. (SP MODE}3:17 HEAD AMP CBA (VEP05150C) HEAD AMP Section IC BLOCK HEAD AMP CRA, 1501 (BA72748) Teale re ¢ ‘oot ei Integrated Geo cso 2 Test Poi wesor | ca rem | ca ‘aucimant vasor | a vase | 2 onncter P01 or ste re Psst os ‘Next Page: 3-81 AUDIO Section3-18. AUDIO SCHEMATIC DIAGRAM : 2G MAIN SIGNAL PATH IN REC MODE = BALE oun rE ————_—_— verre) ay ¢ | A — ——— - IMPORTANT SAFETY Nome anne ‘ice Ae ae NOTE: D9 WoT USE ANY FAST AMEE Gunna aore wr ne wax A sox cusses xe, (526 ais pd trilinttr _| eh ea A eC, BE YT SE Pao acest noch Aa MEAG PR 1 T 2 3 T a T 5 6 T 7 T 8 T a T 3—52 3—53PATH IN REC MODE C0. 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ADDRESS INFORMATION SYSTEU COUTROL & SERVE Stow Fenster asa] Go az | Go me | ce omcor | Cte cue | Ete oss | ce ero |r coos, |r omer | ce ome | Gas asm | a oo | cr aor | ce aro | as so | Ge ana | ete Traitor Revo ‘orcas | e@ ras | 9 fora | eo fora | eo ones | exo ono} exo ono | eo arscot | io cao foros | cz onsiat | Ese corens | cH fonsans | Er ‘oreoo | iets ‘ones | oe es nso | oe ono |e ono | ca onsoe | 00 onsns |e ones | ce roaee | at commas | Oa conics | 8 omen | ee ons | e8 Tetgited Grou reise Tae vote | ke reso | a7 ‘ADDRESS INFORIATIONo 3-30 REMOTE CONTROLLER SCHEMATIC DIAGRAM — UNIT NO.: VEQ1309 — | eo E] saa a9 E98: | } | tH Py HH by py Hy Pe Py | L 1 1 ge J Le | fon for = = ——= t = —— = = (nar. no. sens) ee TE: 90 USE ANY PAT NUMBER SHOWN oH oAEUAT RN oR nace WHEN YOU OMEN A PAT EAE REFER TO PATS LT 7 ee leeeee T 3 ~T a Tt 5 T 6 T 7 —T 8 3—80 3-813-31 REMOTE CONTROLLER C.B A (VEP66197A)332 INTERCONNECTION SCHEMATIC DIAGRAM tc ake 6.8.4. rove c.0.4. Sansran «vePo0Raea ‘vEP014208) ovoR’ HEAD ARP C.8.A. = cyLinper ‘veP0si80c) DRIVE 28.8. uclieid) crexorT) FE HEAD puro TRACT? cy PHOTO Ta. C3) G3. fvevaszay A Ty penooutaror Twiti veces, Pack | Pheu! cB: kt vEP07614A) L iniwance « caRoNiNANce PROK haa: (¥eP03@5700 AMATH ¢.8.4. WePosé8aa) a = fe 1 cos =n] FG ANP C.B.A. vente wit") 5 TENG OEE EAE) WeROinGeR 7 é le wack 8 ena jee OPERATION C.B.A, veras7728) Je oxo wecwanten wn CONNECTION Boe oer fikidie) > TIMER ¢.0.A. iveronséia) luportanr SAFETY Nore: nents DTeCD WN THE Mane A av THe SECAL chueTEASis Fn HET ‘WHEN EAC At O THESE COMPONENT, USE ONLY THE SAKE TF INTERFACE 0.8.4. DOOR PANEL (vePooP 74a) uit NOTE: 00 Aor USE ay PRT NUMBER SHOW ON aS SCHEMATIC RAM FOR (ORDERING WHEN YOU Cea ART, PERSE REFER TO PARTS UST T T 2 T 3 T a 5 6 T 7 8 9 10 13-33 ICs & TRs INFORMATION A 2 tea : ' o 16 hs wo Mt2e0L Mwr280R Mwi260s is ni2ces10 ‘aNS043 pctte702 s -STROEOOE 7 4 mvaort6 vunao13B asap Lege ‘MSMe96s-3RS NM22330§A gwen c> So ge 238709 M8700 2s0i308 wsc22es 280601 MSD6Ot & wPc7eLoss Bu2asirs Mo1451950° gnt4g60 sus206as? wwPo4o668¢ eca asoiera 258790 280608, 28019924 2sD1906 2019922501047 fs wcssaa2 5 BAz25 Basro7r ansi02 ns207 c e c g 10K e 20k e ak é é 3 3 a t c 10% aw2a0n unatit Drant4eK 10k antag vuneett preiiaek Back Page: INTERCONNECTION Section 2k aw2403 unani2 Drat2aeK > ; f ; ; 22K Man s405 2212 orotz4ex. 3—85 & De fe & vsi36asP STKS991 Port Mnig7:25vFY " a i fl 1s , dl , 2 1 74 8 16 isseesse sarzens score Losses aren Meas sors % sara. ae 7 ‘ e 2 2 A 21 5 5 ? &O wt 2 usr were ? asa 2sc331t oc pt ‘ er bi 1s 5 : K & ak 5 : sagt ae 5 pe | 3 was mi) ae ic c c QS ; ; : : ; ATK 6.8K f : : 8 47K 47K : ; ; aK 47K f a 3—86 ees Baseass ‘A3815K ey ‘0 250899 BATEOAN 250592 scf 1 oN 4g 3c 2 fa xa509 aNs407 neat rortavkSECTION 4 EXPLODED VIEWS & PARTS LIST 4.1, EXPLODED VIEW © CHASSIS PARTS SECTION (1) —© CHASSIS PARTS SECTION (2)© CASSETTE UP MECHANISM SECTION@ CASING PARTS SECTION© PACKING PARTS SECTION© REMOTE CONTROLLER UNIT ‘CONTROLLER CBA4-2. 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