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SERVICE MANUAL
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AMPLIFIER
PA-935A
ELECTRICAL ADJUSTMENT PROCEDURE
1. Connection
2. Adjustment - Adjust SVR104 so that the current through the R190 become 4~7mV. When that voltage across the Positive "TP1" to Negative "TP2" becomes 4~7mV, the current becomes 15~26mA.
SPECIFICATIONS
ELECTRICAL Rated Output Power (at THD : 5%) ............................................................. 5W(RMS) Frequency Response (±3dB) MIC 1,2,3 ................................................................................ 150Hz~12kHz AUX ......................................................................................... 80Hz~15kHz CD/SATELLITE ........................................................................... 80Hz~15kHz TELEPHONE .............................................................................. 330Hz~3kHz Total Harmonic Distortion (at Rated Output, 1kHz) ................................. Less Than 5% Signal to Noise Ratio MIC 1,2,3 ............................................................................. Better than 55dB AUX, CD/SATELLITE, TELEPHONE .......................................... Better than 65dB Input Sensitivity/Impedance MIC 1,2,3 .................................................................................. -50dB/600 AUX .......................................................................................... -15dB/10k CD/SATELLITE ............................................................................... 0dB/10K TELEPHONE .............................................................................. 0.775V/600 Output Voltage/Impedance ....................... 4/11.8V, 8/16.7V, 140/70V, 285/100V
GENERAL Power Source ................................................ 100-120VAC or 220-240VAC; 50/60Hz (Supplied AC mains transformer depends on country requirements) Power Consumption ........................................................................................ 40W Weight ................................................................................................. 4.4kg/9.7lb Dimensions .................................... 290(W)x76(H)x185(D)mm / 11.4(W)x3(H)x7.3(D)in
* Specifications and design subject to change without notice.
ELECTRICAL PARTLIST
Ref No. Part No. Description Value Ref No. R105-106 R137 R182 CNT1P A1024Y KTA1023Y C1027Y C3198Y D1302 C3198BL C5197 PBPC306 1N 4006 1N4148 18BM 2068DD 4558D 7915 7815 10 100 R200 R209-210 VR104-105 VR101-103 SVR102-103 SVR104 2008606998-T TR SG NPN KTD1302 TO 2008606999-T TR SG NPN KTC3198 TO 2028443879 2058100995 2058100996 2058304100 2058502180 2118010432 2118010590 2128610800 2128610900 3009100973 3009101973 TR PW NPN 2SC5197TO-3 DIODE BR PBPC-306 SB-3 DIODE RE 1N4006 DO-41 DIODE SW 1N4148M DODIODE ZN 500MW BM 18V DO-35 IC OP AMP NJM2068D DIP8 IC OP AMP NJM4558D DIP8 IC VOLT REG -15V 1A 7915 TO-22 IC VOLT REG 15V 1A 7815 TO-220 RES MF 10 1/5W 5% AX N RES MF 100 1/5W 5% AX N SVR101 C172-173 C103-104 C106 C118-119 C122 C125-126 C128 C131 C161 C159 C107 C110-111 C121 C129 C138 C142 C147 C153 C156-157 C164-166 C160 C167 C170-171 C108 C114 C137 3409210971-T CAP E SM SG 85C 1UF 50V M 5P T C144 C146 C143 C158 3009102973 3009103973 RES MF 1K 1/5W 5% AX N RES MF 10K 1/5W 5% AX N 1K 10K C115 C130 C134-135 C112 C154 C113 C155 C101-102 C116-117 3009104973 3009122973 RES MF 100K 1/5W 5% AX N RES MF 1.2K 1/5W 5% AX N RES MF 12K 1/5W 5% AX N RES MF 120K 1/5W 5% AX N RES MF 1.3K 1/5W 5% AX N RES MF 15 1/5W 5% AX N RES MF 15K 1/5W 5% AX N RES MF 1.8K 1/5W 5% AX N RES MF 20K 1/5W 5% AX N RES MF 220 1/5W 5% AX N RES CF 22K 1/5W J N RES CF 220K 1/5W J N RES MF 2.2M 1/5W 5% AX N RES MF 2.7K 1/5W 5% AX N RES MF 270K 1/5W 5% AX N RES MF 30K 1/5W 5% AX N RES MF 33 1/5W 5% AX N RES MF 330 1/5W 5% AX N RES MF 3.3K 1/5W 5% AX N RES MF 330K 1/5W 5% AX N RES MF 3.9K 1/5W 5% AX N RES MF 39K 1/5W 5% AX N RES MF 390K 1/5W 5% AX N RES MF 430 1/5W 5% AX N RES MF 470 1/5W 5% AX N RES MF 4.7K 1/5W 5% AX N RES MF 47K 1/5W 5% AX N RES MF 560 1/5W 5% AX N 100K 1.2K 12K 120K 1.3K 15 15K 1.8K 20K 220 22K 220K 2.2M 2.7K 270K 30K 33 330 3.3K 330K 3.9K 39K 390K 430 470 4.7K 47K 560 C123-124 C136 C174 C105 C120 C127 3009124973 3009132973 3009150973 3009153973 3009182973 3009203973 3009221973 3009224973 3009272973 3009274973 3009303973 3009330973 3009331973 3009332973 3009334973 3009392973 3009394973 3009431973 3009471973 3009472973 3009473973 3009561973 C162 C109 C151 C132-133 SP_CAP C140 C168-169 C152 C148 C150 C145 C163 C139 C141 AN102 AN201 AN101 CN1 CN9 SW101-102 SW R190 R192 JK1-4 JK5 3509121130-T CAP CE TEMP SL 120PF 50V J RA 3509150130-T CAP CE TEMP SL 15PF 50V J RA T 3509330130-T CAP CE TEMP SL 33PF 50V J RA T 3509470130-T CAP CE TEMP SL 47PF 50V J RA T 3509472530-T CAP CE HI-DI Y5V 4700PF 50V Z 3549472407 CAP CE AC Y2/X1 4700PF 250VAC 3609103120-T CAP FILM POLYESTR 0.01UF 100V 3609104120-T CAP FILM POLYESTR 0.1UF 100V J 3609122120-T CAP FILM POLYESTR 0.0012UF 100 3609123120-T CAP FILM POLYESTR 0.012UF 100V 3609182120-T CAP FILM POLYESTR 0.0018UF 100 3609563120-T CAP FILM POLYESTR 0.056UF 100V 3609683120-T CAP FILM POLYESTR 0.068UF 100V 4355709101 4355709203 4355709309 4428596603 4618001110 4648098510 CON ASS'Y 2P 80MM CON ASS'Y 3P 100MM CON ASS'Y 3P 190MM CON WAFER LOCK(M) 3P ST SW SLIDE HOR DPDT NS L7.5 SW PUSH HOR SPST NS 1U BKT L18 120P 15P 33P 47P 0.0047 4700P 0.01(M) 0.1(M) 0.0012(M) 0.012(M) 0.0018(M) 0.056(M) 0.068(M) ASS'Y 2P_80 ASS'Y 3P_100 ASS'Y 3P_190 LW1143-03 SLIDE SW POWER SW 0.27 5W JY-6313 RJ-1060 3409247971-T CAP E SM SG 85C 4.7UF 50V M 5P 3509101130-T CAP CE TEMP SL 100PF 50V J RA 3509102530-T CAP CE HI-DI Y5P 1000PF 50V J 4.7/50 100P 0.001 3409222971-T CAP E SM SG 85C 2.2UF 50V M 5P 3409233071-T CAP E SM SG 85C 33UF 50V M 6P 3409233871-T CAP E SM SG 85C 0.33UF 50V M 6 3409247871-T CAP E SM SG 85C 0.47UF 50V M 5 1/50 2.2/50 33/50 0.33/50 0.47/50 3409210171-T CAP E SM SG 85C 100UF 50V M 8P 100/50 3409210071-T CAP E SM SG 85C 10UF 50V M 5P 3409210141-T CAP E SM SG 85C 100UF 25V M 6P 10/50 100/25 Part No. 3009752973 3009821973 Description RES MF 7.5K 1/5W 5% AX N TA RES MF 820 1/5W 5% AX N TA 7.5K 820 10 2W 220 2W 100KW 10KA 10K 200 5K 2200/35 10/50 Value
MAIN B'D (C4005407500)
TP1-2 Q110 Q117 Q113 Q111 Q101-103 Q105-106 Q104 Q107 Q115-116 Q108-109 Q112 Q114 BD D104 D101-102 D105-112 D103 U101-102 U103-104 U106 U105 R189 R191 R107 R112-113 R123 R132 R151 R174 R176 R186 R188 R201 R153 R178 R101-102 R108 R115 R117-118 R126-127 R145-146 R152 R172 R175 R177 R124 R133 R147-148 R154 R202 R111 R144 R187 R168 R171 R135-136 R138-139 R165 R142 R181 R199 R166 R170 R173 R204 R116 R114 R159 R143 R207 R203 R140 R206 R149-150 R155 R184-185 R156 R103-104 R119-120 R128-129 R161 R110 R160 R205 3009562973 R162 R167 R169 3009563973 R121-122 R130-131 3009682973 RES MF 5.6K 1/5W 5% AX N RES MF 56K 1/5W 5% AX N RES MF 6.8K 1/5W 5% AX N 5.6K 56K 6.8K 4678699410 CNT PLUG 1P 2008206997-T TR SG PNP KTA1024 TO 2008206998-T TR SG PNP KTA1023 T 2008407970-T TR SG NPN KTC1027 T 2008606104-T TR SG NPN KTC3198 TO
3039100572-F RES MF 10 2W 5% AX P 3039221572-F RES MF 220 2W 5% AX P 3228089410 3228089510 VR ROT HOR 1U BUSH L20 100K W VR ROT HOR 1U BUSH L20 10K A
3228090110-S VR SEMI CE TOP 5MM 10K 3248520120-T RES SEMI FT-63 TP(200) 3248550220-T RES SEMI FT-63 TP(5K) 3408222261 CAP E SM SG 85C 2200UF 35V M 1 3409210071-T CAP E SM SG 85C 10UF 50V M 5P
R109 R125 R134 3009123973
R179 R183 R208 3009223973 R141 R157 R163 3009225973
C3059228776 RES CE 0.27 5W RA T C4438097210 JACK PHONE 1U 4P AN C4438189120 JACK RCA 1U 2P AN
R158 R164 R180 3009393973
Ref No.
Part No.
Description
Value
MAS VR/PW LED B'D (C4005407510)
CN102 CN101 VR106 LD1 4428595002 4428595003 3228089510 2300030006 CON WAFER BOX(M) 2P ST CON WAFER BOX(M) 3P ST VR ROT HOR 1U BUSH L20 10K A LED RND 3.1MM RED CLR 1U ST2.5 LW5267-02 LW5267-03 10KA RED
TEL IN B'D (C4005407520)
TER1 CN201 C4465995803 TERMINAL SCREW 3P 4428595003 CON WAFER BOX(M) 3P ST TERMINAL 3P LW5267-03
OUTPUT B'D (C4005407530)
TER2 CN301 C4465995805 TERMINAL SCREW 5P 4428596505 CON WAFER LOCK(M) 5P ST TERMINAL 5P LA1143-05
ASS'Y
4308989810 4308990110 4308998610 4308000430 4308995510 4308995410 4448200210 4355705907 4458000110 F1 OPT PT 5508412239 ASS'Y AC CORD 2P 3A 250VAC K ASS'Y AC CORD 3P 16A 250VAC V AC CORD 2P 3A 250VAC K AC CORD 2P 2.5A 250VAC V AC CORD KKP-660 BSI AC CORD KKP-560A SAA CLLOSE & CONNECTOR CEC2SQ CON ASS'Y 1P 150MM BLK FUSE HOLDER (EDK20MM) FH-033 FUSE 20MM T 1A 250V K/U/CS/J T1AL/250V O.P.T 100V 120V 220V 230V 240V
C2818085200 TRANS OPT 70/100V 35W PA-935A C2828054600 TRANS POWER 100V PA-935A C2828054610 TRANS POWER 120V PA-935A C2828054620 TRANS PW EI 220V 29.4V 1.04A C2828054630 TRANS PW EI 230V 29.4V 1.04A C2828054640 TRANS PW EI 240V 29.4V 1.04A
WIRING DIAGRAM
BLOCK DIAGRAM
SCHEMATIC DIAGRAM