SERVICE MANUAL AS 3300CONTENTS SPECIFICATIONS ALIGNMENT PROCEDURES ....... 2.4 Test Equipment 22 Power Meter Alignment BLOCK DIAGRAM : cone ELECTRICAL PARTS LOCATION (P.C Boards) . EXPLODED VIEW SCHEMATIC DIAGRAM PARTS LIST CAREFULLY. CAUTION BEFORE OPERATING THIS UNIT PLEASE CHECK VOLTAGE INCORRECT VOLTAGE SETTING MAY SERIOUSLY DAMAGE THE UNIT, WHEN CHANGING VOLTAGE SETTING, ALWAYS REMOVE THE POWER CORD PLUG FROM AC OUTLET. PAGE1. SPECIFICATIONS POWER OUTPUT : coe = 85 watts per channel at 8 ohms (AMS, 2 channels driven at 20 ~ 20,000 Hz, 0.1 56 T.H.D) TOTAL HARMONIC DISTORTION INTERMODULATION DISTORTION FREQUENCY RESPONSE POWER BANDWIDTH (-348) HUM AND NOISE (IHF, short-cireuted A network, rated power) | INPUT SENSITIVITY (for rated output) DAMPING FACTOR MAXIMUM. INPUT VOLTAGE TONE CONTROL RANGE BASS eee ries MIDRANGE TREBLE TONE CONTROL SWITCH LOUDNESS swiTCH : (Volume control set at ~30 48 position] HIGH FREQUENCY FILTER TAPE OUTPUT LEVEL GENERAL SEMICONDUCTORS POWER REQUIREMENT... 00... 00.04 POWER CONSUMPTION DIMENSIONS NET WEIGHT + 0.1% at rated output, 0.1% at rated ourput 20 ~ 20,000 He +0.5 48 5 — 40,000 Hz AUX 9048 TAPE PLAY: 9048 MAG PHONO: — 6548 (High sensitivity) » 7048 {Low sensitivity) MAG PHONO: = 3.5mV (Hi) Smv {Lo} AUX 150 mv TAPE PLAY &: 150mV TAPE PLAY B: 150mV TAPE 8: 150 mY (DIN connector) mic: BmV/10k ohms «95 (1 kHz, 8 ohms} - MAG PHONO: — 180 mV (Hip 200 mV (Lo} 210.48 (82 H2/125 Hz) Turnover frequency 250 H2/500 Hz 2608 (1kH2) #10 dB (10 kH2/20 kHz) Turnover frequency 2.5 kH2/5 kHz Switchable flat and variable 50 He: +1208 1 KH2. 43.508 10 kHz: ~100B TAPE REC A: 150mV TAPE REC B: 150mV TAPE REC B: 30 mV (DIN connector) HEADPHONES: — Low impedance les 5 Dual transistors 4 Transistors 8 110V/130v/220V/240V (Switchable) ‘360 watts (MAX. 4 ohms) 150 watts (UL) 240 watts {CSA} S00{W) x 184(H) x 295(D) mm without legs and knobs 14ka 18kg without package: with package:2. ALIGNMENT PROCEDURES TEST EQUIPMENT ‘The Test equipment listed below ate required to test and align the AS-3300 HI-FI Stereo Amplifier. a, Audio Signal Generator: Frequency; 20 Hz to 20 kHz variable Output level; 0.5 mV to 1 V variable b. Power Meter: Capable of measuring 0 ~ 100 watts, © Dummy Load: 8 ohm 200 watts. POWER METER ALIGNMENT 12) Connect the output af an Audio Signal Generator to the left "AUX-1" input jacks on the amplifier rear panel 2 DUMMY LOAD + 5 2 8a 3 PONER METER Re Figure 1. Test Set-Up AUDIO SIGNAL ‘AUX b) Rotate the Selector Switch in the AUX 1 position. ©) Place the Mode Switch in the STEREO position. 4) Rotate the Speaker Mode Switch in the A position fe} Connect the 8 ohm resistive dummy load to the left A SPEAKERS output terminals f) Connect 8 Power Meter across the 8 ohm resistive dummy load, 4) Temporarily, set the Audio Signal Generator output to zero, h) Rotate the Volume Control to full clockwise position. i) Set the Signal Generator to 1 kHz and increase the signal generator output until Power Meter brings on the 5 watts of meter scale. i) Next, adjust RVI on P.C Board PSPWO23COX to bring the meter position on the 60 watts of Left ‘channel output power meter on the front panel. k) For the right channel power meter alignment, connect the & ohm resistive dummy load to the right A SPEAKERS output terminals and Power Meter paralleled with it. Then, adjust RV2 in the seme manner as step "i"3. BLOCK DIAGRAM TAPE Bq SUPE rape 5 HIGH FLTER LOUDNESS PLAY RECON PLAY. REC AUX? AUXGL TUNER PHONO-2 PHONO-1 SPEAKERA © © @ © © © SPEAKER TREMe [=] ween ose E ee : 3 song SPY me Stenson B 25. | EP me B J SL ia. + seven 7 Figure 2.4. ELECTRICAL PARTS LOCATION, PRINTED CIRCUIT BOARDS “Te! psmaczecoxFigure 6. MIC AMPLIFIER (PSAZ007COX) PSPw023C0X le so] ie eose” "| Figure 7. LAMP SWITCH (PSAZ009COX)Figure 10. PRE AMPLIFIER (PSPA029COX) Figure 9. TONE CONTROL (PsPTousLUA?5. EXPLODED VIEW6. SCHEMATIC DIAGRAM MODEL AS-3300 { 2} 390k R23, 1004] 2g 300k PRE AAS a 28y Paoncz @ Tuner O ax axe 0 PSPAO29COX PSAZOO7COX 93.4 Quz 2SAa47(F,6) 28C1708(F,6) PSPTOO8COX Qu2 28A738(6) 934 28C1685(9,R) 956 28C1685(,R) TREBLE Aes. PSMAOZ6COX ais VAI 22) 2k2 %. VRI.2,3 SOkB seb DUAL GANG 34 956 ) 280356(0,.8 28c1708.6) 912,14,15,16,17 '28C1685(0,R) gunis 2SA5644Q,R) 4 L A SPEAKERS: * TW BL, ew t ‘SEMICONDUCTOR TERMINAL CONNECTION BOTTOM VIEW UNLESS OTHERWISE NOTED E-EMITTER :COLLECTOR B: BASE Bce Boece 200 e009 eee 0000 eee Bee 2sciazs «2A 798 zscisas —-25A 847 -2SD 358 25a 564 25C1708-25A 758 oa 25c 828 / e7es tesa cassa, a0 PSPWO23COX —<——— - ———- —__- ——__- —__- —$__69@— bs © SPEAKERS. R Joos ‘SPEAKER MODE A e c AB ac PHONES me os oun on 1-4 2SC1685(Q,R) 28C826(0,Y) 25¢1685(9,R) 42.R) a5 4a Ra HE, 5B yet 00 Toe coi Be sie ou ou ou POWER METER MLW) AL Pls {ou tie PSAZOO9COX — 21 )ascazal POWER METER M2(R) s —> Oh 2SASO4A(QR) _2SA768(QY)__ 2SAS64A(Q,R) | Pszz017cox NOTE: ALL VOLTAGES MEASURED FROM COMMON NEGATIVE CHASSIS GROUND WITH A VTVM AT NO SIGNAL CAPACITORS VALUES ARE IN uF UNLESS OTHERWISE 1. 2. 3. NOTED. p = PICO FARADS RESISTORS VALUES ARE IN OHM. KILO OHM‘SYMBOL NO. DESCRIPTION 7. PARTS LIST FOR AS-3300 SYMBOL NO. DESCRIPTION | Fuse 2.5AT (spare) Bracket, heat sink mtg. Front Panel Heat Sink PW Board at'y (MIC) 01.2 Integrated Cireut S.60W "GONE AMP) PW Board ais'y (MAIN AMP) Bushing, function sw. shaft Frame, met Rear Panel m2 Meter, power PW Board att'y (PRE AMP) un scr one Coupler fnetion PLi— Lamp, 6.3V 35mA SECURITY, POWER Shaft, Bracket, security lamp. ‘Spacer, MAG SENS sw. "lamp board brkt | Jack, 5P DIN "lamp board Fuscholdae Pw Board, (LAMP) Terminal, GNO earch, rear panel pis? Lamp, 8V 0.38 blue 82 Socket, Voltage Select Socket, lamp Support, voltage selector Bracket, turnover sw. Cover, " PW Bosrd ass'y (TURNOVER) ‘eek, AC Terminal, speaker jack $3 | Rotary Switch, SPEAKER MODE Escutcheon 3 Jack, 3P HEADPHONE Handle, escutcheon st Switch, lever POWER Knob, MIC VR Cover, power lamp "SELECTOR, SP MODE Chassis "over Bracket, chassis reinforcing, loft "BALANCE cote fixing Button, push sw, chassis reinforcing right Spring, push button c1,2 Elyt. Capacitor 10000uF 60V Lock Ring, push button a Metal Oxide Film Resistor 88 ohm 2W Knob, TURNOVER 2, " 1.5K ohm 2 Butr, power sw Connecting Plate, Eiyt. capacitor Knob, POWER Terminel, GND earth, chassis Cate, top Pr Power Transformer “bottom | Bracket, power pw board mtg Foot PW Board as’y (POWER) ‘ie point 16mm Label Pua Fuse SAT ‘Screw, tapping, rear panel etc, — M3x8_ 4 “ 28AT "pan tapping, pin jack M3x8 Bracket, bottom case fixing "" semus, power sw. tone board ete, Max L_SYMBOL NO. DESCRIPTION SYMBOL NO. DESCRIPTION Screw, flat heed, exutcheon — ax8 | | 3-6 Transistor 2861685 (.f) “pan head slide sw. 2.638) | VA Contro! 200KMN/200KB “flathead, handie maxio | | va2—4 B0KE “tapping, chassis, front panel ete Terminal. 3° Max ° “Inside tote, main boarder ev ea hs tapping, meter cover 3x6 ae toot axe panes binjock wane | FE? flys. Capacitor = «3.3 uF 25V “flat head, AC jack m3x8 | | CPato0 Ceramic Capacitor 12 pF 50V pan head, voltage selector M3x16 | | os. g ” 33 oF Sov Hoxa Nut, AC jack, voltae selector oe ” a0 oF gov Masher nie rote, Aik vine | | cri, 12 Myer Capecitor 01 nF SOV Seraw, bind head cose moxio | |S. 14 . 8200pF Sov Washes tot, toot 21,22 Eivt.Copad 22 uF BV ee 23, 24 * 47 nF BV Earth Log, eon type 025,26 ” 47 uF 10V Instruction Book - Eng. French version | | ©27-28 . 47 uF a8v Gen Sundin arson | | 033.34 Coramie Capacitor 120 pF OV Pw Board 038,36 Myler Capacitor 068 nF OV on Trix asass7 ie) | | Alylee Carbon Resor 82K ohm 14 03,4 ” 28C1708 (F.6) n Jack, MIC Ror2b. 30 . tse vat onto}, 10K 5,6 . oon Short jumper, 12.6mm BS — 48 228 on? Elyt Capacitor — 3urur — 25v | | A7.8 . zk ca4 Ceramic Capacitor 82 pF — sov | | R9.10 . 2am" 5.6 Elyt. Capacitor 10 uF tev | | 1.12 . sek c7-10 * 47 af — asy | | R13,14 " KO" cia ” vue sov | | ni8. 8 " ex cis CxramieCapestor 47000 gov | |g . ax 015, 16 ” 10 oF — sov | | P39" 40 ate Carbon Resistor 1.6K ohm aw] | 23-26 amon 3, 4 ” wok " "| | 31,32 » on 5, 6 ” ce 10K A7.8 ” 680 «| | Rs7.38 ” aK 9, 10 ” 270K «| | Rai, a2 ” 43K . ati, 12 “ 22K 49,50 39K ” 13,14 ” 12k + | | rs1,52 ” wo" PW Board PW Board a1,2 Transistor 2SA798 (6) Push Switch 10‘SYMBOL NO. cia 5,6 7-10 1,12 RIL2 ct 1-4 °9,13 05,0 10,14 au a1 ont viz p12 ois RV1,2 €1,2,9, 10 3,4 05,6 7,8 crt, 12 15,16 17,18 19 20,21 22-25 R1,2 3,4 R5,6 87,8 Ro~ 12 R13,14 DESCRIPTION PW board joint wire, 11P Mylar Capacitor 022 uF 50V ” o047uF SOV ” 033 uF SOV ” coveuF —50V Carbon Resistor 1.8K ohm 1/4W PW Board Integrated Circuit NJM4558D Transistor 2801685 (0.R}) 28c1708 (F.G) 2SAS64A (Q.R}) 281826 (0.Y} ” 2SA768 (2.Y) Diode 181855 Diode zener mz314 ” S86 ” SS5R Resistor semi-fixed 100K Fuscholder Heat Sink Short jumper 12.6mm Terminal, 6P 7.5mm. naps Screw, tapping M3x8 Lead Wire, solid type 40mm Elyt Capacitor = 1 gw OV. " 47 uF tov " 47 uF 2v Ceramic Capacitor 150 pF SOV Elyt. Capacitor 68 FSV " 100 uF 8 22 uF 38V ” 47 uF tev ” 100 uF a5 Ceramic Capacitor 01 uF S00V Carbon Resistor 4.7K ohm 1/4W 0" 10K 2 0" " 470K" ” sek” ‘SYMBOL NO. R15, 16 R17, 18 R19, 20 21,22 R23, 24 25 - 28 31,34 R92, 38, 39 R33 R35 R96, 37 a0, 41 1,2 03, 4 05,6 011,13 a2, 14-17 pi-8 po 10-12 Ps U2 B 1,2 3,4 5,6 7,8 9, 10 11,12 13,14, 19 15, 16,21 22) 33, 34 17, 18 31,92 37 38 40 DESCRIPTION Carbon Resixor 18K ohm 1/4 " moe . aak . cee z0K «* : ee 85K 19K aK " woo om Metal Oxide Film Re. 10" 1/0 PW Board Teaser 2sa7%0 (0) . 2s0358 (0. ascr7a (FG) 2SABEAA (0.8) " 28¢1086 (0.8) Diode 151559 " vose ” 151655 Positor(Tharmistr of pouive character) riiaeya0sBesuzTS Choke ci 25 uM | Retay | Terria, 6° 7m oes Short jumper 12.5 fivt.Capector 47 uF 28 | Ceramic Capscitor 220 pF SOV ” 4 pF 50v ” pF SOV Elyt. Capacitor uF 35V Mylar Capacitor uF 5OV Elyt. Copacitor = 1g SOV Ceramic Capacitor 4700 pF 50V Elyt-Capacitor = 47, uF 10V ” 33 uF ev Mylar Capacitor 3900 pF SV |eivt.copacier «2.2 uF 50V “ 33 uF BV‘SYMBOL NO. DESCRIPTION SYMBOL NO. DESCRIPTION ca Elyt.Copacitor 100 uF 16 ‘Short jumper R12 Carbon Resistor 47K ohm aw] | 1,2 Tantalum Capacitor 2.2 uF 16V R34 ” wk "| foae Ceramic Capacitor 47 pF SOV R78 amon" | 1056 . 10 pF 50V F9, 10 * sa” | fore | MylarCapacitor 1200 pF—SOV 11,12 . ax” "| e910 3900 pF — 50¥ R13, 14 Metal Oxide Film Re. 56K" vvaw| | c11,12 Elyt. Capacitor «22 uF T0V 715, 16 ” zx | fers.14 * 47 uF 25V R17, 18 ” ss” ow | |crs.16 1 nF 50v 19,20 . ro 0" ow | | er,18 Ceramic Capacitor 4700 0F — 50V 21,22 vo 270 aw FY alas 78 Carbon Resistor 100K ohm V4 R31— 34 Carbon Resistor 10K" aw] | 19. : fe Rana " wx "TV pe to ” ox" 97,38 . sok oo | | rta.a2 ” 750K" 75,6 ” sox "| | R13 16 ” 2aK 39, 40 . zak" 17, 18 . on R41, 42. “ 82K" "25, 26 22K R43, 44 22K 21,22 “ 300K” ° 96, 72 * aK —___________} R57 ” Ko R58 ” Bk R59 ” 180K" Reo 20K" Rot ” 470K ” Rez . 10 " Roa “ mK 55, 64 Motal Oxide Film Re, 330" W 65, 66 Carbon Resistor 18K" 1/4 oer "mon eB Metal Oxide Film Re. 470" 2W Roa ” KO” PW Board 01,2 Ioteprated Circuit TA7136 st Slide Rotary Switen PHONOT-AUX2 82 Slide Switch nes Pin Jack, 4P 4 ”e 2 Terminal, 3P mm PW board joint wire, 11 |