a) () ORDER NO. ADge03081¢8 Service Manual Tuner/Sound Processor Tuner DU eatsvsunnocuno PRO-LOGIC c * sB.ch770 . © sB-cH770 sB-PcI0 eae (10: Black ‘Areas * SB-PSIO : * sB-PSto | Sul for Area Colour Modal No © | Euope RS-CHT70 —SE-CH770 emote Control (€8)_[ tain Transmitter i (€6) | Germany anaitaly Bocauise of unique interconnecting cables, when a component requires service, send or bring in the entire system. ‘sia, Lain America, 2 sd = (60) | wiaste Eas. ica and Oceania Specifications 1 Pre-amplitier section System: SC-CH770 Input sensitivity/impedance PHONO 25mVis7ko ‘Stereo separation EXTERNAL, VCR, VOP 250 mViN5 kee tide 9548 Output eve! ‘Antenna terminals) 75 2 (unbalanced) EXTERNALVCR REC OUT 1somvitsko AM tuner section Frequency response Frequeney range PHONO. S0H2— 15 HzI+1 510-2068 Por (2) and (EB) areas} MW 522 164% kH2 (@kz stops) EXTERNAL, VOR, VDP 20H2—40 kez 530~ 1620 kz (10 KH? stops] SiN tw “144268 kets (8 KH stops) PHONO IN 79 48 (7 48, IHF) {For (€) and (GC) areas] AM 522” 1611 Kee (9 she steps EXTERNAL, VOR, VOP DIN 60 8,82 a8, IF) 530~ 1620 KHz (10 KHz stops) 1 EQISFP section Sensitivity (S20 48) Genter frequency 20 iti, 1 hei, 7 kee {For (EYand (EB) areas] MW 500m EQSPACE modo Lw S01 ‘Smodes HALL, CLEAR, HEAVY [For (€6) and (G0) areas] AM 500m V.BASS mode wm Timer section Genter frequency yoHz Glock Quartztock ype V.BASS 1 {3e3 Function 24-hour programmable V.BASS 2 3608 Play timer (1 time), REG timer (ttm), DOLBY PRO LOGIC section Sloop (120 min, 80 min intervals} PRO LOGIC mode SURROUND, 3STEREO Setting * minute-23 hours 50 minutes CENTER mode NORMAL, WIDE, PHANTON (min intervals) DELAY TIME 20s (Fixed) General FU tuner section Dimensions (WxHxD) 270 x89 x 282 mm Frequoney range 87.50~ 108.0MHz (0.05 MHz stops) Weight 17g Sensitivity 18 (HF usable} ‘N26 06 4S1N Note: Specifcaions are subjectto change wihout noice. SiN Woight and dimensions are approximate, MONO 70.48 (75.48, IHF) Tunerisound | Gompactdse Front Center | Surrouna Systom | processor | changer ‘Ampliior | Cassetedeck | speakers speaker speakers Seon [ston | s-cnr7o | secon | psourre | “secure | sect | seesio * For (E|(EB) and (EG) areas: Mado in PAES. For (GC) area : Mado in NABEL WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain watnings or cautions to advise non-technical Individuals of potential dangers in altempting to serviee a product Products powered by lecricily should be serviced or repaired only by experienced professional technicians. Any allompl lo service or Fepair the product or products dealt wth n this service information by anyone else could result in serious injury or death ‘© 1096 Matsushita Elects Industrial Co., La Technics Aire eres, Grated PyrosT-cH770__| m@ Contents ceoe Location of Contras. 2 Sehomale Diagram en Seting the Tine 2,3 Printed Grout Boerd biagram css 90 ~ 29 Enjoying ROS Broadcast (Por @) and (6) evess) 8.4 Wing Connection Diagram Be About the Sel- Diagnostic Mode 5 Block Dagram. , a ie ~ 40 Operation Check an Function ef 1G Terminals ssn eae Nain Component Feplacement Procedures & Repiacement Part ist ‘ew a0 To Supply Power Source 7 Cabinet Parts Location. 81 Measurements and Adjsiment (For and (EG) areas) 8 NOTE: Refer to the service manual for Model No. SE-CH770 (ORDER No. AD9603055C8) for information on “Accessories”, “Installation”, “Connections” and “Packaging”. @ Location of Controls @ Source input solect button (SELECTOR) @ Remote control signal sonsor (SENSOR) @ Karaoke modo select bution (KARAOKE) © Display © Tuningltimer select button (TUNING/TIMER) @ Set button (SET) © Record timer button (© REC) @ Play timer button (® PLAY) © Display mode select button (DISP MODE)...for (E) and (EG) areas @ PTY select button (PTY)...for (E) and (EG) areas © PTY search button (PTY SEARCH)...f0r (E) and (EG) arcas, ‘@ FWWFM mode select button (FM, -AUTO/MONO) @ Tuner indicator (TUNER) @ LWIMW select button...for (E) and (EB) areas ‘AM button...for (EG) and (GC) areas © Tuning modo select button (TUNING MODE) © Clocktimor button (CLOCK/TIMER) @ Echo button (ECHO)...for (GC) area @ Setting the Time This is a 24-hours deplay clock ‘These instructions explain how to set the imer for 16:25 (4:25 pm.) on Wednesday. I 2 Case ® S a @) ()1 Switen on the power. “The very fst ime you tum ON the power or whenever you tum {LON attor having Unplugged and plugged te stereo In agatn, you wil hea the sound ofthe tray mechanism. There is nothing \wrong with your CD changer. This happens because of inital ating. 2 @ Press CLOCKITIMER to show “CLOCK”. Within 8 seconds: © Pross SET. 3 @ Press TUNING/TIMER (v or 4) to select the day @ Press SET. 4. © Press TUNING/TIMER (v oF 4) to select the hour. @ Press SET. 5) @ Press TUNINGITIMER (v oF A) to select the min- utes. @ Press SET to finish setting the time. ‘The dloplay will return to the previous display affer about ‘3 seconds, ‘ST-CH770 When “SUN 0:00" flashes: Itflashes when you connect the AC power supply cord for the fst tina ori tere has been @ power fale. IMthis happens, reset the tine Ifthe minutes setting has gone wrong: 1. Press CLOCK/TIMER, 2. Press SET 3 times, 3, Press TUNING/TIMER (v or a) 10 set the minute, and then press SET. To display the clock again: Press CLOCK/TIMER, ‘The clock display wll appear for about 8 seconds. For your reference: When you tum OFF the power from the POWER button, the stereo ‘goes on standy and the STANDBY lamp lights up. @ Enjoying RDS Broadcast | For (E) and (EG) areas ] For extra turing convenience, the SC-CHT770 lel you take advantage (of the Radio Data System (ROS) In aroas whore RDS broadcast ‘services are received. This advanced system simples oporation land provides useful information util2ing a 57 kHz subcarier above ‘he aust range, in adition tothe main FM signal What is RDS (Radio Data System)? IDS {s multplex-broadcasting system which adds a varoty of ‘massage signals to the audio signals of FM broadcasts. This system can utiize the following signals among the various ADS, signals. RDS messages used by this system: PS (Program service name): Name ofthe broadcast station PTY (Program type): Identficaton signal for program types such ‘ae news and spon “PTY” may not be avaiable in some areas. (Future function) Oo 0 0 Functions of this system which use RDS To display the name of a broadcast station (PS display) ‘When this system recolves a PS signal in an ADS brosdcast, the name ofthe broadcast station is shown on the splay. To search for a program of a particular type, such as news or sport (PTY search): When you wish listen toa parva ype of program, progam of that type can be searched Furthermore, while the PTY signal is being received, the name of the type of program curenty beng broadcast can be shown on the display { Note] Even if an FM broadcast staon is transiting RDS signals, the functions of ths system may notbe able to ulze these signals ifthe signal qualtyis 10 poor. Example of PS playST-cH770_| To display the name of a broadcasting station (When the FU station is received) Press DISP MODE. tthe FM broadcast being received provides the RDS service (RDS" Indicator wil light), the name of the broadcast station and "PS" inaleator willbe shawn onthe dsplay ofthis system, Each te you press the buton, the display will change as folows. Frequency csplay-» PS csplay-+PTY cisplay —_—E—ee—eesss [Noto] the FM broadcast being received does not provide the RDS service, “NO ROS" wil be displayed when PS display made or PTY splay mode is selected. ‘eit PTY signal Is not being received, "NO PTY" will bo displayed when the PTY display mode is selected ‘eViten receiving a broadoast station, in PTY mode, which dogs not transmit PTY, tho display will not show "NO PTY" automatically The same also applies to "NO ROS" wien RDS isnot transmitted, ‘When the desired type of program Is located: ‘The type of rogram Is displayed for approximately § seconds and the program wil automaticaly change tothe broadcast station that has just boon located. “To search fra different broadcast station, press the PTY SEARCH, ‘once more while the type af program is displayed. About the PTY display ‘There ag a total of 15 PTY alsplays on this unit. The display changes In order each time the PTY SEL is pressed. Tho table shows the ‘tderin which the display changes, and also gles an explanation of cach display. To listen to a program of a particular type, such as news or sport (PTY search) & (©The PTY search is catied out with respect to FM broadcast stations {hat have been preset into the memory. Make sure tat "Memory Preselting’ have beon completed befor carrying out PTY soarch, ‘© Carty ou this operation while tuning in an FM broadcast. "PTY" may not be avaliable in some areas. (Future function) Press PTY SEL to select the desired program type. ache you pres ts bro, te PY dpa wllesangeln sequence. 2 We PT cisply esting (approx. 8 seconds) Press PTY SEARCH. ‘The PTY eeatch wilbegin, CPT" wi fash onthe pay) If the desired type of program is not found: "NO PTY" wil be displayed for approximately 5 seconds, and the program wil return to the previous broadcast station. Most-recent memory: “The most-recent memory system "remembers" the program ype last selocted when the unt was switched OFF. For example, "SPORT Js selocted and the system is tumed OFF, when the PTY SEL is pressed again, “SPORT willbe displayed. [ dispiay | Explanation Display Explanation NEWS | Shor accounis af fact, ovents and pubidy POP M Commercial musi whien would generally be | expressed views, eporage and actualy. ‘onsidred 0 be of current popula appeal, often faturing in current or reson record | AFB AIRS | Tonia pogram expanding or enlarging ‘upon the news, ganoraly i dierent sles cars, presentation sy or cance. neuding ROCK M | Contemporary mado muse, uavaly writen ocumentary debate, or analysis. 7 land performed by young musicians INFO Program whose purpose isto impart advice TOR. M | (cle of te Road Music). Common term to into widast sons Inouclag matoroiogca deserbo music considered taba reports and forecasts, consumer airs, “easysistening’, as opposed to Pop, Rock or medical hel, oo. Casta. Musici Bis category is often, but [SPORT | Program concemed wit any aspect oFepor._| always, vocal and usualy of short EDUCATE _| Program intended primarly to educate, LIGHT M | Classica! Musical for general, rather han DRAMA | Alvadioplaye and saa special, appreciation. Eramplos of musle A Perseniseres_| inthis category ar instrumental muse and CULTURE | Programs concemod with ay aspect of vocal or choral works, palo ore oe, neta Casi rotors ol at ocaaerl wen religious afar, philosophy, social eience, ee symphonies, chamber music et, and lee EE | including Grend Opera, SCIENCE | Programe cue naralecenes an FoTHERM | stuciea! tyes not ting ino any ofthe : - above categories. Parculrty used for VARIED | Used for mainly spoech-based programs, specialist music, of which Jaze, Aytim & usualy ofa lght-rtenainment nature not ies, Fok, County, and Reggae are covered by above categories. Examples ae anion Guzzas, pane! games, personaly | ores, comedy est, | ‘Ater“OTHER Mis splayed, the dplay retums to NEWS. q)Ci About the Self-Diagnostic Mode |__st-cH770 ‘This unit is equipped with a selt-diagnostic function which, in the event of a matfunction, automatically displays a code indicating the nature of the malfunction. Use this self-diagnostic function when servicing the unit Display method Display location To display the malfunction code U-70 0D: U-70 DECK:... Automatically displays on the tuner/sound processor when a malfunction occurs. .. Automatically displays on the tuner/sound processor when'a malfunction occurs. et FTo roturn to the normal display 1. For U-70 CDIU-70 DECK: Press an any operation button on the tuner/sound processor. ‘*To re-display the code, switch the power off (POWER, STANDBY button), and then switch power back on again. 2. For F-61 ‘*11F-81" le dloplayod, the power will automatically be switched off and the standby indicator wil ight up. ‘©°F-61" willbe displayed for 8 seconds, and then the clock willbe displayed, '*o ro-display the code, switch the power on. “F-81" wll be re- displayed, and then after 3 seconds the clock wil be displayed, and the power will automaticaly switch of foe Tuner/sound changer processor (SLCH770) (ST-CT770) Cassetio deck (88-cH770) Ampllier (SE-CH770) Problem or onan coneeton prosraure A buena communicllons enor hee sentra SS tee atts bung iered Inco. ths preventing ne Stom tom ope. 1.1070" splayed onthe tuneeound procomor ape asek or D Changer | Pateae Beret be operat onc con 1. Tocosk or comet sein o he teats uroso, Settee esa Ces inet teat casa be back of ho wns ho for niet Mak exe owns anneal on your tahoe 2. pieakage of lat cable. (Check and fopace rent a. In eon tt conectd by toms trjatl et tbe Ws nts = falc Sor: (200 serooucoser) Scere (Gio cssoenaco0) eon 1701 (M37471M4850F) Grok hes I end oe as neces ‘Wn power Such &onehed on. | #Fauly anlar SECHTTO spat (ORD ror |amoratadiyouicues beso mosrgh | "(mena be vkape oped ote cpestrominls) inpenbicswtch powerst-cH770_ | 1 Operation Check and Main Component Replacement Procedures 1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. 2. For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required. 3. Illustrated screws are equivalent to actual size. 1, Checking for the tuner P.C.B., dolby pro logic Check the tuner P.C.B., dolby pro logic P.C.B. P.C.B., operation P.C.B. and video jack P.C.B. operation P.C.B. and video jack P.C. Sevens 20GB Tuner PCB. c : Ox4 iemove the top cabinet s ay Ca oa Video PCB. Dolby profogie P.C.B. 'as shown below. @> 0 cae {(RHD30007-K1} © @eiacky © (lect) =... | OD Om P.C.B. support. (XTB3+8JFZ) ‘(XTBS3+8JFZ1) 2. Checking for the ms + Check the main P.C.B. as shown below. GND plato Remove the top cabinet. ep Connect the lead wire, Raise the main P.C.B, @> oc» Om o caw (RHD30007-K1) (xTe3+aJFZ) Qa 0 exe QuD o wax (xTB3+16JFZ) (xTBS3+8JFZ1) Release thé 2 claws, then remove the main P. and 4g. lw ()ST-CH770 @ To Supply Power Source This unit ST-CH770 is designed to operate on power supplied from the Amplifier SE-CH770. When operating the unit ST-CH770 alone for testing and servicing, without having power supplied from the Amplifier SE-CH770, use the following method. Power Supply to Main Circuit 1. Short the section between the test points MEXEN and ‘and as well as the section between the test points (A.GND] (et) anc 2. Connect the 3V AC power to pin 1 ofthe incieator module FLSO1 and the GND terminal opin 87 ofthe same FLOO1 module. 3. Apply 11 VAC power to the Section between the point igeNHH AC)) and the point MESH ({CT)) as well as the section be- tween the point ([AG]) and the point BEY (CT). This unit comes to stand-by mode, 4. Short the section between the jumper 4318 EES and the point [D.GND] ofthe jumper J608 EEXEY for a moment. The main circuit comes to power ON mode. (Whenever this operation is performed, power, ON/OFF mode is repeated.) Power Supply to Tuner Circuit 1. Apply power couree to the main circu 2. Connect the DC +12 V terminal othe jumper J610 FERRE, and the GND terminal to both the point [GND] of the jumper «1609 and tho point [D.GND)o¥ the jumpor J608 AST using the DC power supply too Note: I the GND terminal ofthe OC power supply tool is connected tothe pont [D.GNDJof the jumper J608 an error aceure in measurement values for voltage and waveform. ‘To Check Signals Connect the oscilloscope or the speaker with the builtin amplifier to the EXTERNAL (OUT) terminals and check ifthe signals are ‘outputting from this unit EXTERNAL (OUT) torminals [LINE OUT (UR eh Oo o oh a | I it 8 ce a ole #0 ofp- tmac),_} —_J | ime bi BE co areas L_ —+— 4608 EEESEI|D.GND] Power ON mado | >> Yooo RE GN TOS BPr torch ‘oe a frie and &) [L_+- snvoe = Lo | (ero im _ Fig.1st-cH770 _| ™@ Measurements and Adjustments | For (E) and (EG) areas ] Measuring Instruments and Special Tools ‘© FM signal generator (FM-S@) ‘© RDS modulator AC electronic voltmeter (AC EVM) # (Min, 0.3 mV measurable) #75 0 coaxial cable ADS (Radio Data System) BPF Adjustment 1. Test euiment conection shown nF, 2 2. Sotthe ul oF mode 8: Sal he radio equery lay and signal generator to 100-10 He 4: pgjut VRSSO so that ho HEEL ouput maiz, How to make simple adjustment without using a RDS modulator 1. Tuner into @ FM broadcast with a ADS signal ransmited from a FM station whose electe fel intensity Is moro than 80 48. 2, Adjust VRSBO so thatthe ‘output is maximized. ant #Acey fa hassle Fig. 3 ‘© What is RDS (Radio Data System)? FM Signal Generator Condition Woduston 00% Modulate rnc 1 WH OS moduaton ame Supt ve soe srcem use vot | — rn ode) ewan t, ‘75a 2oaxil cable Fig. 2 Note: » Use the voltmeter measurable up to 0.3 mV at the minimum. ROS is a muitiplex braadeasting system which add a valey of message signal tothe audi signals of FM broadcasts, ‘This unit can uilize the folowing signals among the various RDS signal. RDS messages used by this unit '® PS (Program sorvice name) Name ofthe broadcast station © PTY (Program type) Identiication signal for program types such as news and sport "PTY" may not be avaliable in some ar )ST-CH770 mSchematic Diagram Page EQ TUNER CIRCUIT For (& area... 10-12 TUNER CIRCUIT For (E6) ara . on 13~15 EQ TUNER CIRCUIT For (e6) area 16,17 EQ TUNER CIRCUIT For (cc) area. 18,19 Ey OPERATION CIRCUIT... + 20,21 ain circurr . E 22-28 BD potsy protoaic CIRCUIT For ) and (EG) areas... 27-29 ‘© This schematic diagram may be modified al any time with the development of new technology. Notes: ‘© 8901: FM switch (FM) $902: LIM solect switch (LWIMW)...for(E) and (EB) areas ‘AM switch (AN)...f0r (EG) and (@C) areas #8909: Tuning mode seloct switch (TUNING MODE) #8908; Timer/lack switch (TIMERICLOCK) # $905; Sot switch (SET) ‘8 8806: Tuningtimer select switch (TUNING/TIMER V) '© 8907: Tuninglimer select switch (TUNING/ TIMER A) (©8911: PTY search swiich (PTY SEARC...or () and (EG) areas 8912: PTY selector switch (PTY SEL..1or(E) and (EG) areas. #5913: Display mode selector swich (DISP MODE}...or(E) and (EG) areas. #8914: Echo such (ECHO) ...or (GC) area #5915: Karaoke mode select switch (KARAOKE) ©8916: Play tar switch ( PLAY) '8917: Record timer switch ( REC) #8918: Sourco input solect switch (SELECTOR) «indicated voltage values are the standard values forthe unit measured by the DC electronic circuit tester (high-mpodance) with the chassis, {taken as standard. Therefore, there may exist some errors inthe voltage values, depending on the internal impedance of the DC ciruit tester. ® Votage values and wavelorms are measured as Indeated Inthe schematic cegram when test points betwoon TREE ene IRE. an between ISEB an A.GND are sored, No mark: FM mode (AM (MW) mode <> SAM (LW) mode ‘ lmportant satty notice: Components idenfies by 2\ mark have special characterstics important for safoty Furthermore, special parts which have purposes of fire-retardant (esisors), high-qually sound (eapacttos), low-noise (resistors), et. are used. When replacing any of components, be sure to use only manufacturer's specified patts shown in tho pats list © caution! IC and LSI aro sensitvo to stale cloctriety. ‘Secondary trouble can be prevented by taking caro during ropat. Cover the parts boxes made of plastics with aluminum fll Ground the soldering ion. Puta conductive mat on the work table. Do not touch the legs of IC or LSI withthe fingers directly #Voitage and signal tine ===: Postve votage tno eer Fr signal ine cioae> + FMOSC signaline AMC(LWAW signal ne CCCE> + AM (WIN) OSC signal ne RECOUT signaling ezzzzz> + MIC signal ine Canter speaker ive signal ne Nogative voltage tine ‘Surround speaker drive signal ineST-CH770 FQ TUNER CIRCUIT For (E) area. P.c. Board: on page 30) Tr: = ite ~ oe = = me, 2 - = —10-Oo ST-CH770 —— : Positive voltage line =>: FMsignal ine _coek>: FM OSC signal ine => AM (LIM signal line CEE : AM (LWIMW) OSC signal tine ict 108 anes [asses _ ieee me Seem Te sc amamanc | eg. ae et i = & Bh . ee Ven | 78 mae nal ae Sy i iain CIRCUTT(CN102A) GIRCUT(CNt01A) CIRCUIT(ENSO1A) on page 25 (on page 25 ‘on page 25 aeST-CH770 EXtuNER CIRCUIT For (E )area. (P.¢.Boardion page 30) toss2 Leetiatranes Ghearsarra. =12-—2— : Positive voltage lina <=>: FM signal ine gn0¢>: FM OSC signal line I ST-CH770 AN sional ne Sect 1AM OSC signal ine EQ tuner ciRCUIT For (EG) area. (P.C. Board: on page 20) -13-ST-CH770 | EXTUNER CIRCUIT For (EG) area. (.c.Boaxtion page 30) Sa z Sa, fa ty 9301-108 raat toro Fas AM Et occur uex 210708, eee i Sie ‘9 ‘ToRAMAIN ToRIMAIN CIRCUTTICN102A) CIRCUITICNYO1A) Coeds con page 25 a 14- CCIRCUTT(CNSO1A) on page 25 q@) @= : Postive votage tine => AM signal ine tessa UGesr2sranos ‘ST-CH770 >: FM signaling goug>: FM OSC signal ine sr ECO: AM OSC signal line =15-ST-CH770 | Ey TUNER CIRCUIT For (EB) area. (P.c. Boar: on page 31) oor f Ck seu’ - ~ ——— - ~ Beret ~te~Positive votage tine FI signal fine ==> 1AM (LWIMW) signalling coce> ‘2g0¢>: FM OSC signal tine ‘AM (LWIMW) OSC signal ine ST-CH770 06 SATA HAASE SSL oseauru nex SP SScanARSTA ‘ToRMAIN ToRRHAIN CIRCUTCNTO2A) ——-_-CIRCUTTICNO1A) on page 25 on page 25 -17-ST-CH770 | EEA TUNER CIRCUIT For (GC) area. (Pc. Board: on page 31) G—o—@ Pigeg?s te102 (SrA omre-1 oO oO q@_ST-CH770 t=: Positive voltage ine = =: FM signalling oat>: FM OSC signal line ==>: AM signal ine co52+1AM OSC signal ine (ateaoun Tet ng te CIRCUTT(CN024) CIRCUTT(CNr01A) ‘on page 25 on page 25 oesT-cH770 | EEIoPERATION CIRCUITE coat: on page 22) dH i wf ey L ANA |—— Positive votage line x05 et Seetera SSF on = Negative votage line L ST-CH770 ToRIMAIN cireur (ens01A) on page 28 ToRIMAIN cireurr (CNo02A), on page 35ST-CH770 | MAIN CIRCUIT (P.c.Boarcion page 83) ~22-| ST-CH770 Positive voltage ine ewecronee: Nogativo voltage no <=}: FM signal ine Tap FAM signal ine SEED TRECOUT signaling camp MIC signal ne | Bs ~23-sr-ch770_| MAIN CIRCUIT (P.c.Board:on page 39) aPa ——:— : Positive votage tne >: AM signal ine =: Negative e votage tne ‘eaE=)> : REC OUT signal ine ST-CH770 >: FM signal tine zz : MIC signal line 9305,305 315.316 sBossridasia. ons leases Beaaseets So Pena Q300.310.317 mean aanaane 397 208 ae Co ge] Bhat GY geen poe = ” oceans og ones ae i we le i oo it ing ft :FM elgnal ne =>: AM signal ine =D: REC OUT signal line zap : MIC eignal ine ST-CH770 == : Conter speaker dive signal ine S8G% : Surround speaker drive signal line DOLBY PRO LOGIC CIRCUIT (P.CBoardon page $2) TofMAIN ciRcurr (CNa01) (on page 22] ToRIMAIN ciRcurT (en701) ‘on page 22 e702 Metiossarne Aer StarARsTA Py eae a Sua OE8tasaneta ig rose TB video CIRCUIT (coercion page 31) =27-ST-CH770__| BDoisy PRO LOGIC CIRCUIT (P.c.Board:on page 32) === | Positive voltage ine =ee=f-e=o= Negative voltage tine oOST-CH770 > FM signal ino =>: AM signal tine === 5: Conter speaker ctve signal ine GEEE> * Surround speaker dive signal line —29-ST-CH770 @ Printed Circuit Board Diagram ‘© This circuit board diagram may be modified at any time with the development of new technology. TUNER P.C.B. (REP2151D-1) PY TUNER P.C.B. (REP2151C-1 For eG] area, 00m (em hes ‘ oh A Et -30-L__st-cxi7zo TUNER P.C.B, (REP1930F-T) a TUNER P.C.B. (REP1930E-T) For 5} are. For {GC} area sonen) 8008 ~31-ST-CH770 REpasesD-S DoLsy PRO Loci es Poe olorrrarone.ce, /REPESEES Patan nerswg mis ch -33-TS SATE ae) wevToecoer | — BAReeerDeT | LvioroN INSBTOFPTA —|-BPIMEDBEGr>ET —eaPt IMct40668FEL | TaPIN|LoesT2aFAH05 |S0PIN 2 IRoweorenr~ [+a RnwUrsraRuT2 [SOP - i iweoeoseP=t [esp | % t lmszazorPer laze i |g | Taree wepiarava | sSBmeIAR | ascoowoaasTa | aswaoTa | z80aiaiS | 2802137PQTA | PSDSBOAASTA | | Bosse ZeROGKR UNS | RL DOEROS S500 pocarssre —UNIIT9 e wares 2sc27a7L. uNazit ces aK cao MAZSWWA 28C3311A-0 UN4213AITA, "| MATOOTA BeosstiaNsTa UNAENETA |< a es0tssonTA EU Guersera co uNett Kaew ie | meio | aso ae ere weaesoo eo naost = waeostMiTA Pa x el 4 ern | oe maaee-H | cans re Maworsira . a | tamara | *—@p@—* | ia kan ia tnosamra | ae | @ Wiring Connection Diagram Bhnecs aoe Inve! VIDEO Ei PCB. Blorenanion p.c.. qo| st-cH770 @ Block Diagram‘ST-CH770 micro comPuTER| ST-CH770‘ST-CH770 6 a 6 Oo we Oo —38- Saas. LeST-CH770‘ST-CH770 | ‘SYSTEM CONTROL) Plone —40-| _ST-CH770 @ Function of IC Terminals © 1C901 (M38198MCO66F) Bh | Ferns | yo Funetion in | Terminal [| Funetion 2 [revorien| 1 [omer opuain owt aga nou a4 | smc | 1 [AS poner souco nputominal 3 | xevse | 1 [5€.cH770 operation smth signal input 6 | reser | 1 [reset sgnalinna + | wev-co | 1 [st-ct770 operation switch signal input a8 | so __| 1 [sp sgnalinputorunerorcut 5, BELESTORY «| 51-ct1770 power conto signal ouput 37 | STEREO | | | STEREO signal input for tuner exeut Data output for NJU7S19, M62422, M62425, Pe eee | 7 DATA | © |Lcrate, Laz7es and Lviot4 % ui ! 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PY SE ese 7 aes oo = eves foes es —— mies ooo Taman | 1ST WE pow —— miss oor (eo iraies |. [p94 joaes [Done {cee) fevoet405R [SR PLAY TIMER | I fevaai405R |S%, RECORD TIMER [naar [ss Siero fase Joona t foomcron a) arma ammo) | ean — ROT owen fi coat Jowrarer common —— | ato anasto factory fie tnae-Tonover a arin fowaea —aroseor- ose) fa fuaors — rer faces — aaron loaner) fi aamnaeT oor commana |e fasoia — sro omen sari ore sce Fieoe fice —oomerrencr ~ | fear — ort faerie) —— aca Freni—aosrioz omer ar [ar jase —oo, usu —[amecroa enn aco emf sas —lnvecro ca) fuio4 [evexrinnkaa coi a |rsSiA6820 —_[oONNECTOR(onP) fa 306 fm foot. | jnsiin —fomerer (ust [sucasio#-1n loot r |RJUUSTWOL2 — |CONKECTOR(IZP) lui —_evesmaen oot. serra —frwecron zr ~ sa ronan fis feuexrionaa loo | oa (ug01 JELESNIDIKA [COTL. ~ fesui, 602 |Swei0o4-2|GND PLATE. {L901 |RLOALOOJT-Y [COIL a iar ary jaar ——fsaornra ar {crao1 IL [CERAMIC FILTER oT (orate i. |CeRAWIC FILTER [JaCK(S) 1 | fet — an ora cso fem — fee oot fa ass asco aD bese — fsa er na —— px |ALFDGTOSDD — |OSCILLATOR(1O. 65 Miz) = jokoOn [RITOGSKIS [SYSTEM CONNECTOR (ISP) (x03 [RSAC THADSOST |OSCILLATOR(?. 2 Mlic) fot [RITOSKI9 [SYSTEM CONNECTOR(29F) = fist issn oc aos fine jamoseon [nev erwecron fis iors occa wi) bra freos-rv—ien at fen ——Jeroccmona_oscrtaone wi — [kr —fsrs-s rok Ae fsar —— isons oscar 0 win fires [sao-a ir Waco wR OT [DISPLAY TUBE — [sar esa — say Te 1 : q@Oo ST-CH770 Notes : + Capacity values are in alcrofarads (uf) unless specified othereise, P-Pico-farads (of) F-Farads (F) ‘ fevistancy value re in ohn; rless specified othervise, 1-1, 000(B) C1, 0K(0) veto | arti | vatues ations ff mete | nortan | tates a ments |] tte | mart te | as ets jase | 20 fae aap [ak esis a, 08 lessen | 7m oss. xian fz, 210 |enoserseaT | 1/7 ook fsr—_femserscst [er [rao lemszrsio1 | 1/aW 100 jaani,2i2 [ennsetsi2a | 1am 12K |R3S8 [ennsorsez2 | 1/8 2K jnioe——emszrsios [ivan 10K fs, 214 feosornear | far 88 sss soo femeorsars [uve am jos rmsersers_[1/A" #70 zis, 216 _lerosersemet_ | 1/er_2 1K fot ameorsice [erik face —— jose 1A er fev. 2e jams | vena. fee Jin 2 fu ——fssaes [1a — 20 xe, ma est | in sa tesserae fie ——emiervre [xa feat a eoseract | et 7. 5k fs —_— emerge — 1 (R103 [ERDS2TU331_ | 1/4W 330 jrazs,204 fenmserasea | 1/5 aK jaavi, 372 |ennsetsioo | 1/a# 10 (rai jemnszTsi02 [AW IK (nazs,226 [enosetva7e | 1/W 4.7K jaa, 374 1 220K fie eowerare | 18 io fern lessee | vera. brs vali a ies ant erie | ver —2 2 = tak (ria jennsz1se2 [| 1/AW 5.8K (nasa, 234 |enoseTsee3 | 1/an 22K jesva, 370 femmeoenia | ion 10 fs et — 50] pfs a | jas a 1A" 1k 208 eosin aq fer frases [a ea jan? lemserseerr | van eo zs, zao_lemosersice | 1 jee Jemeensost [iv un fs ——~fmsceasr [en 5 st, 252 ewer | rh ak fs ——femservae [wa fans ——fmserios | 110 fess ——emserses | ier — at ost, emo [v2 ak (Rizo fenoszivars | 1/aW 47K (R54 jenosets2ze | 1/8 2.2K jaass, 304 [emnseTi00 | 1/a¥ 10 jut ——jrmsoraez [3m a fo a fern [ven 2 2k fee —— mse [vk jefe [van 2.1 a heer jmerist_[aar 6 fe fz [an — ero as 208 fsriea [ne fs fwsernm [war —L.0 fase imsarse [ve ko? Jose [ra x ren eset er — m0 faz ose [xan 10 rs eos wer ak fs sori [1 ak zs screen [xan — a2 fiw —— eos | var ak fase ——eersazt 1c rics femecrvars [aa ak fang. a16_fenosornae [17a 1K Jaass femoris | aw 12K fso—jemsernios [aw 104 fv. 18 femsorae [ret a0 fsa [meena [ax jams [a8 — in ise eset | —s0k foe arson [ar juni fsa aK rea. eos [ear —I0k fs ——fosorn [xr x0 jae —— fms xk im ies seuss er. ak sna 9 emsrsers [vam afoot [12 Ee su siemens fuss fuser [xr res 00 less vera ps0 esis [Sa jnias, 1a [enosenieee [ifaw 22K jRaai, 332 |enoszTazze | 1/4R 2. 2K [R551 jenos2T4223 | 1/8 22K fans, 146 fenmscraeen [iW a2 [mas jempszrsio4 | 1/4 100K [Ras jenosetsi03 | 1/4 10K jw. esaert [1A tom so ve | fas ——Jesersna [va — 1k jaws |mmcacor [anos ns vari sess | 1 ion fr remem [va — ik ise vik 2 se ferro. fare limeoraer: [xa 0 ran. 308ewsersi | a 300 Sess ar jars lesa [var — 1 rs learn | v1.2 se esas var fre lesenasar [120 ow 32ers [17100 sto ewserse [ve far ——femseraer [18 47 foo fewest [vin [se msec [re just leisexnoa Pak tron fare [re sso emer 1a jetse. fenosersize | 14¥ 1.2K [raas, 246 [EmDszTviON | 1/4¥ 100K [a jenosersiss | 1/1. aM jes feosensae [ier i. an_c foe en freee —[ ek | seer | 12.2 jie femeenaien | ied 1.28 tl] _—_frereioa [18 Ta sean ius | 0 fs ——emserne [2 ok) | fro rosoost_[ aw mh a finesse [aie fest ——erosore [vrata fisre Jamar [ar ik [zc 204 lerosorvars [vane [eso |erosonnee [v/v 1.08 srs sre emusorsice [van 1K ~45~ST-CH770 oO q) wee | rat | tance mons |] mess | rats | tates a mats |] meme | recta | tate mie fsa ——_seon | ae io fc TCT | wa fae [aoa [vee | fase Jessie [sr 1k fest —— meer va fissr frre |e. 9 jason, so2ds [eRDORCWIaRrT | 1/aR 47 [rez femps2rsiss | 1/an 15K [Rs38 jenosorsioz | i/ K aa cox serait ec isos —Jeetion [1a — io fxs —— eset [ar 0 fis, fmarrees [yer 2 ax facets | 18 0 fe 7 —ecersors | ira |] 08 forme [vera joe —eosriser 1a ma — emerson | x47 er. ewer a0 js esses [sr — 2 a ro, x2 —lenosersion | iver aon ——_—_|frota——_|resznsera | 1/8 a fstz faerie [vat re or. 0 lomsenaia | v2.2 fists 8 freee [1 1k axa sia —eserieet [ti ak foes ——femariiea [vera ow iron x0 jis louse [van 1K hes ams [ar — 300 jefe [a es — enero [ wae 47 how —emserue [7 ik eso emer —[vt—a fo ewer [yar 150 fons emserset | va 30 st ——jemserion [xe io cx fest bare aso ——emsenaest | ve — wor merece [1 aK fice osetia Paver ik |e [rosea | ree a a a fi os fensernct [1a a asa, 51 ems | v7 — ek ross soir | 1a (R637 |enosernoo | 1/10 jess, 856 |ERDSTUIO2 | 1/H IK [Rass jerosznsion | 1/100 jc lenaseroa [an tok |r 56 —[emseeniai | vat a0 fs? fermen | uA 1K fea series xen a0 est ——lemerae vara 0 ass emeaari [1 a0 js omer [at ok a asss ——emszsioo— |e — io fn ——femeerszn | 8 — tx fea —jemsrast | van ae iso farsa [17am jassi-054 lemsztener | 1aW 22 [nes jenosena72 | aH 47K [R961 jenoszrsi03 | 1/aH 10K a cs sas emer [yer — ae fisse Jizan ve — a ase ——famserant [ia — esac eset yar — ak assy ——fmsorare [1k am fen ——faseri [ae oa fist famsrtnee [ura ra oes | et 0k er a — Emenee | a7 fess ——Jeusersre [1776 es, roa feuservee | at 8.24 perk ars eset | joss meena ver — 12k sos eerste | ara. 34 fies remeron [yar 8 fissr —fszrere [van a.m evr, row femsersira [iver 47K —__—|fs.__esoserzi_| ao emo ‘(rong aco [omrniso | 1/41. jev0g, rao fenoserauos | 1/a¥ 10K [rsaz [eRoszTsi0z | 1/48 1K (Rai jeRos2Ty104. | 1/aH 100K erie essen — wa —& 2k fim —— janes iae js ower] va fe oiserveo @ sm ersernse | ver 1 ak fists —fmszrisi—| vn —i0 ns. loser — fis —— fsa [ar fiom a—fomczuera | vn — an fat ese a ea oe rT fears a oa jer? —esrrne Tr 1K free sera ine roses [ian 2a ise femseton [an Tx resales soe rosea azar 10 fies 5 —Jamerie [wank (R01, 802 |ERDS2TIOS2T | 1/4H 3.9K fRsi0 “[enosenseet [yar aa0 [R996 jenoszrsion | 1/4" 100 or: eseriee | 1a" 2.28 jewseree [ae 1k fee —Jamserce [var aw 08 easeioe [ik iment 2k | : ne 10 asernia [aK iment - fens font eset [ar 0 mse |e fess ——frservre [1a om ewsera | eek our —— oS | ToT a wea eerie [ara ak oe ios —Jreriss-[e7_«. 00 fe —— eerie [1a — 2k jose [ve — ak fine io ~eerimcaas [soso fie ——emseraest [1a ak a ios Jxeicroass |i. a ava 20 estate ar aK iste [ae 1k fa rerio | sw ams nna | an a fosenent [vez |e formar | sw 10? 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