QSC-EX800-pwr-sch维修电路原理图.pdf

POWER AMPLIFIER CIRCUITBAL INPUTOPTOCELL LIMITER GND REF +INPUT A GND DETECTOR CLI P CLIP PWR-ON THERMAL SENSOR SPKR THERM AMPLIFIER MUTING DC FAULT DETECTOR ON/OFF MUTING TO SPKR HOUSEKEEPING POWER SUPPLY +24 V +15 V -24 V -15V MUTE POWER AMPLIFIER CIRCUITBAL INPUTOPTOCELL LIMITER GND REF +INPUT A GND DETECTOR CLI P CLIP PWR-ON THERMAL SENSOR SPKR THERM AMPLIFIER MUTING DC FAULT DETECTOR ON/OFF MUTING TO SPKR +24 V +15 V -24 V -15V MUTE SPEAKER TERMINALS SPEAKER TERMINALS COOLING FAN 24 VDC LEVEL DISPLAY -30 -10 TEMP/PROT DISPLAY LIM/CLIP DISPLAY RED LED RED LED YEL LEDS THERMAL FLASHER DISPLAY DRIVER CH 1 GAIN BALANCED INPUT 11-POSITION POWER-ON DISPLAY GRN LED STEP DRIVER LEVEL DISPLAY -30 -10 TEMP/PROT DISPLAY LIM/CLIP DISPLAY RED LED RED LED YEL LEDS THERMAL FLASHER DISPLAY DRIVER CH 1 GAIN BALANCED INPUT 11-POSITION POWER-ON DISPLAY GRN LED STEP DRIVER CH 1 CH 2 FRONT DISPLAY PCB 14-PIN J 101 J 201 26 PIN J 1 IN/OUT BUS CONNECTOR IN/OUT BUS CONNECTOR CH 1 +INP CH 1 -INP CH 1 GND CH 1 SPKR MON CH 1 CLIP MON CH 1 THERM MON CH 1 PROT MON CH 1 PWR MON +24 VDC +15 VDC -15 VDC -24 VDC CH 2 SPKR MON CH 2 CLIP MON CH 2 THERM MON CH 2 PROT MON INPUT TERMINALS INPUT BOARD 14 PIN 26-PIN J 32 NO CONNECTION TO SECOND HOUSEKEEPING MASTER HOUSEKEEPING POWER COMMON HOUSEKEEPING SECONDARY. SPEAKER BOARD AC POWER TRANSFORMER AC FUSE AC VOLTAGE SELECTOR CH 2 SECS TO +50% POWER SUPPLY TO +50% POWER SUPPLY J 50_, 14-PIN J 60_, 14-PIN POWER AMPLIFIER CH 1 POWER AMPLIFIER CH 2 OUTPUT RELAY OUTPUT RELAY FAN -24 V 18 VAC CT 18 VAC PTC PTC TO EACH CH THERM SENSE J 5_, 5 PIN? FAN SPEED CONTROLJ 5_, 2 PIN, OR COMBINE WITH 5-PIN? POWER AMP BOARD, BOTH CH J 501, 6-PIN MATELOK CH 1 MAIN SECS 0.25-INCH TABS PIN 3 PIN 2 PIN 5 PIN 6 PIN 1 PIN 4 T 501 T 502 J 501, 6-PIN MATELOK 0.25-INCH TABS PIN 3 PIN 2 PIN 5 PIN 6 PIN 1 PIN 4 T 501 T 502 PC-004001-00 PC-004101-00 PC-004002-00 PC-004104-00 PC-004103-00 BLOCK DIAGRAM, EX-800 REV A, 3-18-91, QSC AUDIO PRODUCTS INC, DOC NO SH-004100-01, FILE SH4100A2.FCD PART NUMBERING SCHEDULE FOR PCBS USED IN EX-800 POS VOLTAGE NEG VOLTAGE RECT (1) FUSE (2) POS VOLTAGE NEG VOLTAGE RECT (1) FUSE (2) RadioFans.CN 收音机爱 好者资料库 2200 35V -15 V REG -24 V UNREG 100 +24 V UNREG +15 V REG78153 2 1 1N4746, 18V 1N4746, 18V 1002200 35V 7915 32 1 +24 V +15 V -15 V -24 V -24 V 24 V BRUSHLESS FAN 2.7K 2.7K 2.7K 2.7K 47K .01 U 52 D 53 D 52 U 51 C 54 C 53C 56 C 55 D 51RN 51 C 52 Q 52 2N2907 Q 53 2N4410 R 52 R 51 C 57 C 51 Q 51 2SC3298B 18 Vac1 18 Vac2 CT3 PTC-60C THERMALLY CONNECTED XF PTC XF PTC TO Q 607 J 51 R 698 1N4004BR 51 100-35V 47-10NP 35 V 35 V SCHEMATIC, 2-CH POWER AMPLIFIER, EX 800SCHEMATIC, 2-CH POWER AMPLIFIER, EX 800 SHEET 1, HOUSEKEEPING POWER AND FAN SPEED CONTROLSHEET 1, HOUSEKEEPING POWER AND FAN SPEED CONTROL +23V ON/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROL J 52-1 J 52-4 TO SHEET 2 NOTES. 1. ALL RESISTORS 1/4-WATT, 5% UNLESS NOTED. 2. ALL CAPACITORS 100V UNLESS NOTED. TOLERANCE 20% FOR ELECTROLYTIC TYPES, 10% ON OTHER TYPES. PC-004001-00 PC-004002-00 DISPLAY PCB INPUT PCB SPKR PCB 101-199201-2991-29 301-399401-49931-49 501-599601-69951-69 701-799801-89971-99 901-UP (SAME BOARD FOR CH 1, CH2) PCB NUMBER DESCRIPTION CH 1 PARTS CH 2 PARTS PARTS IN COMMON 125 W, 60 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX. SCHEDULE OF TEST POINTSETCJ 502-1 CH-1CH 2 J 502-1 J 602-1 NEGATIVE LIMITING VOLTAGE J 502-2 J 602-2 POSITIVE LIMITING VOLTAGE J 502-4 J 602-4 AMPLIFIER LOOP OPAMP OUTPUT PART NUMBERING SCHEDULE FOR PCBS USED IN EX-1600: PC-004104-00 PC-004101-00AMP PCB PC-004103-00AC PCB 3. BRIDGE RECTIFIER BR 51, 1.5A, 100V. 4. R 598, 698 IS POSITIVE TEMPERATURE COEFFICIENT RESISTOR MOUNTED TO HEAT SINK. 6. ZENERS D 503, 504, 603, 604 MARKED 7.5 V TESTED FOR LOW LEAKAGE, QSC P/N QD-0007.5-ZT. 7. ZENERS D 509, 513, 609, 613, 6.2V-500mW, TESTED FOR LOW LEAKAGE, QSC P/N QD-000024-QD. J 502-3 J 602-3 NOT USED J 502-6 J 602-6 POS AMPLIFIER RAIL-HIGH VOLTAGE J 502-8 J 602-8 NEG AMPLIFIER RAIL-HIGH VOLTAGE 5. PARTS MARKED WITH TRIANGLE MUST BE REPLACED WITH EXACT TYPE ONLY. 8. PARTS ENCLOSED WITHIN DOTTED OUTLINE HAVE VOLTAGES GREATER THAN 42V. +23V ON/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROLTO SHEET 3 5 4 A B C D AUDIO PRODUCTS PHQ 5-15-91 1 3 SCHEMATIC EX 800 DRAWING B PROD RELEASE PER ECO 1107 GLF CREVISED PER ECO 1158 LG. 7-9-91 SA/SGM5-29-91 SGM SGM5-29-91 W.R. / DREVISED PER ECO 1128RDS A 3.3-1W R 53 HEAT SINK GROUND AUDIO AND POWER GROUNDS E LG REVISED PER ECO 1262 7-26-91SGM RE-000006-PT RESISTANCE 100 OHM COLD, RISING AT 55 C. QSC P/N RE-000006-PT SGM11-6-91 6-10-92FREVISED PER ECO 1508 SGM APPLICATION USED ONNEXT ASSY WP-004101-20EX800 SGM GREVISED PER ECO 1602 WR10-22-92 REV D, 10-22-92, FOR PC-004101-00 DOC NO SH-004101-02 FILE NO SCH800G*.FCD 1 3 4 2 LAST USED REF. DESIGN. D51 - 53, D513, 613 F504, 604 J51, 52, J503, 603 K501, 601 L501, 601 Q51 - 53, Q510, 610 R51 - 53, R544, 644, R598, 698, R599, 699 RN51, RN502, 602 U51, 52, U506, 606 VR503, 603 BR 51, BR 502, 602 SGM HREVISED PER ECO 2009 LG. /RAB 180K JREVISED PER ECO 2371 MP (EFF. 7-28-94) 5-11-94SGM FAN BLK FAN RED SH-004101-02 1 K SGM KREVISED PER ECO 2393 MP (EFF. X-28-94) 7-20-94 SH-004101-02 K SCH800J1.FCDSH0800K1.FCD C51 - 57, C526, 626 RadioFans.CN 收音机爱 好者资料库 A SPKR SIG GND GND GND A 470-1W CLIP 10K-2W 470-10V 470-10V 10K-2W TO +15V TO +15 V TO -15 V 5K 5K SPEAKER BUS 1N400410-25V TO -24 V 470-1W PTC-60C THERMALLY CONNECTED T 6 +15 V T15 -15 V T16 PROCESSING BUFFER 50C +O.5V 90C +8V THERM ADJUST, 0.5-8.5V THERMAL SENSING T 1 T 3 GROUND MUTING INPUT CAP. TIMING CAP. T 2 RELAY DRIVER T 4 ON-OFF MUTING DELAY RELAY MUTE -24V RUN +15V MUTING BUS RUN 0V MUTE +8V SHUTDOWN MUTING IC-000010-00 MUTE BUS T 5 T 7 THERMAL SENSE, 0-8V T 8 THERMAL BUS, 0-8V T 9 OP-AMP OUT - HF PROTECTSHUTDOWN DETECTORS TO MUTING DC PROTECT SENSE T10 THERMAL LIMITING T11 IDLE -1.2V CLIP +3V PEAKS0-3Vac NORMAL AUDIO 4.5-6.5Vac CLIPPING PEAKSMUTE +4.5V LIMITING THRESHOLD +4.5V CLIP RECTIFIER-BUFFER HIGH FREQ DC RECTIFIER THERMAL T12 T13 T14 CLIP BUS OP-AMP OUT OPTOCELL T25 POSITIVE DRIVER, +0.6V IDLE T24 NEGATIVE DRIVER, -0.6V IDLE T23 POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHORT POSITIVE BIAS CONTROLLER T22 POSITIVE CURRENT FEEDBACK +3V PEAK T21 POS CURRENT TRIMMER T20 OUTPUT VOLTAGE FEEDBACK LOAD IMPEDANCE SENSING T19 NEGATIVE TRIMMER BIAS ENABLE NEGATIVE BIAS CONTROLLER T18 NEGATIVE CURRENT FEEDBACK, -3V PEAK T17 NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT J 502-1 J 502-4 J 502-2 + CURR LIM+ CURR LIM - CURR LIM- CURR LIM- CURR LIM R 598 TO Q 508 R 530 R 528 C 513 VR 503 VR 502 R 529 C 518 U 503 R 527 C 515 C 514 C 516R 531 47-50V 47-50V D 512 .0033 100 BIAS 1N4004 1N4004 25 C .01 50 OHM BIAS NETWORK BIAS J 502-3 VR 501 R 599 C 504 D 505 D 506 C 512 22-1W 2SA1302 .22-3W 2SC3281 IN5402 22-1W 4.7-1W 4.7-1W 2SA1306B 2SC3298B .10 3.9-2W 1N5402 2uH .10 HEATSINK GROUND AUDIO OUTPUT STAGE .22-3W 3 PL 3 PL 3 PL 3 PL SPEAKER COMMON 10A-250V 10A-250V TRANSFORMER CENTER TAP SPEAKER OUTPUT NC NO QSC PART SW-000029-SW TO -24 V 5.6-2W J 502-6 J 502-8 J 501 6-PIN MATE-LOK 3 4 6 1 2 5 C 511 BR 501 F 501 F 503 K 501 Q 502 R 504 R 502 Q 501 R 519 R 518 R 520R 521R 522 Q 508Q 509Q 510 D 508 Q 505Q 506Q 507 R 516R 515R 517 D 507 L 501 R 525 C 506 R 524 C 507 5.6-2W R 523 D 501 JUMPER +70 V -70 V TO -70 V RAIL D 502 JUMPER TO RECT BR 501 47K-1W R 542 TO -15V C 510 R 508 R 507 N.C.8200-80V 8200-80V N.C. N.C. 4.7K-1W SCHEMATIC, EX-800, SHEET 2, AMPLIFIER CHANNEL ASCHEMATIC, EX-800, SHEET 2, AMPLIFIER CHANNEL A +23V ON/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROLTO SHEET 1 J 52-5 J 52-6 2 OF 3 390 390 R 532, 47K +INPUT GND REF PWR-ON AUDIO INPUT STAGE HEAVY LINE SHOWS MAIN SIGNAL PATH SPEAKER BUS 47K-1W R 533 VTL 5C4 U 504 68 p A 5532 10K-4 75K 47 BA 3 5 6 8 4 7 +15 V -15 V DC 2 1 A .0022 47-10NP C 525 U 506-B R 541 RN 501 U 506-A C 520 C 521 R 538R 536R 537 C 524 R 540 C 522 R 539 A 7 9 14 590 R 544 27K 4.7 K464 27p 12.1K-.5W .10 220-10NP C 517 R 543 THERMAL MUTE 14-PIN RIBBON J 503 10 8 11 6 5 12 13 330K TO +70 V RAIL 1N4735 6.2 V D 513 27pC 526 SH-004101-02 2 K SH-004101-02 K SH0800K2.FCD 1N4735 6.2 V D 511 D 509 1N 4148 D 510 1N 4148 RadioFans.CN 收音机爱 好者资料库 A SPKR SIG GND GND GND A 470-1W 10K-2W 470-10V 470-10V 10K-2W TO +15V +24 V +15 V -15 V -24 V 10-25V TO +15 V TO -15 V 5K 5K N.C. N.C. N.C. N.C. 14-PIN RIBBON T 6 +15 V T15 -15 V T16 PROCESSING BUFFER 50C +O.5V 90C +8V THERM ADJUST, 0.5-8.5V THERMAL SENSING T 1 T 3 GROUND MUTING INPUT CAP. TIMING CAP. T 2 RELAY DRIVER T 4 ON-OFF MUTING DELAY RELAY MUTE -24V RUN +15V MUTING BUS RUN 0V MUTE +8V SHUTDOWN MUTING IC-000010-00 MUTE BUS T 5 T 7 THERMAL SENSE, 0-8V T 8 THERMAL BUS, 0-8V T 9 OP-AMP OUT - HF PROTECTSHUTDOWN DETECTORS TO MUTING DC PROTECT SENSE T10 THERMAL LIMITING T11 IDLE -1.2V CLIP +3V PEAKS0-3Vac NORMAL AUDIO 4.5-6.5Vac CLIPPING PEAKSMUTE +4.5V LIMITING THRESHOLD +4.5V CLIP RECTIFIER-BUFFER HIGH FREQ DC RECTIFIER THERMAL T12 T13 T14 CLIP BUS OP-AMP OUT OPTOCELL T25 POSITIVE DRIVER, +0.6V IDLE T24 NEGATIVE DRIVER, -0.6V IDLE T23 POSITIVE BYPASS, +7.5V NORMAL, +2.5V SHORT POSITIVE BIAS CONTROLLER T22 POSITIVE CURRENT FEEDBACK +3V PEAK T21 POS CURRENT TRIMMER T20 OUTPUT VOLTAGE FEEDBACK LOAD IMPEDANCE SENSING T19 NEGATIVE TRIMMER BIAS ENABLE NEGATIVE BIAS CONTROLLER T18 NEGATIVE CURRENT FEEDBACK, -3V PEAK T17 NEGATIVE BYPASS, -7.5V NORMAL, -2.5V SHORT J 602-1 J 602-2 + CURR LIM+ CURR LIM - CURR LIM- CURR LIM J 602-4 470-1W 1N4004 R 628 R 630 CLIP C 618 R 629 VR 602 VR 603 C 613 R 627 47-50V 47-50V C 615 C 614 U 603 C 616 R 631 J 603 D 612 1N4004 .0033 1N4004 100 BIAS 25 C .01 50 OHM BIAS NETWORK BIAS J 602-3 VR 601 R 699 C 604 D 605 D 606 C 612 22-1W 2SA1302 .22-3W 2SC3281 IN5402 22-1W 4.7-1W 4.7-1W 2SA1306B 2SC3298B .10 3.9-2W 1N5402 2uH .10 HEATSINK GROUND SPEAKER BUS AUDIO OUTPUT STAGE .22-3W 3 PL 3 PL 3 PL 3 PL SPEAKER COMMON 10A-250V 10A-250V TRANSFORMER CENTER TAP SPEAKER OUTPUT NC NO TO -24 V 5.6-2W J 602-8 J 602-6 J 601 6-PIN MATE-LOK 3 4 6 1 2 5 BR 601 F 601 F 603 K 601 C 611 Q 602 R 604 R 602 Q 601 R 619 R 620R 621R 622 Q 608Q 609Q 610 D 608 Q 605Q 606Q 607 R 616R 615R 617 D 607 R 618 L 601 R 625 5.6-2W R 623 C 606 R 624 C 607 D 601 D 602 JUMPER 8200-80V +70 V -70 V TO -70 V RAIL JUMPER C 610 TO RECT BR 601 47K-1W TO -15V R 642 8200-80V R 608 R 607 N. C. N.C. N.C. 4.7K-1W TO -24 V SCHEMATIC, EX-800, SHEET 3, AMPLIFIER CHANNEL BSCHEMATIC, EX-800, SHEET 3, AMPLIFIER CHANNEL B +23V ON/OFF ENABLETRANSFORMER THERMAL SENSORTHERMAL BUS TO FAN SPEED CONTROLTO SHEET 1 J 52-2 J 52-3 3 OF 3 390 390 R 632, 47K J 602-4 +INPUT GND REF PWR-ON AUDIO INPUT STAGE HEAVY LINE SHOWS MAIN SIGNAL PATH SPEAKER BUS 47K-1W J 602-4 R 633 14 9 7 A 75K 47 3 2 1 .0022 C 622 R 640 R 638 C 621 C 620 R 639 R 637 U 606-A R 641 590 A 8 4 7 +15 V -15 V C 68 p A 47-10NP C 624 R 636 C 625 5532 10K-4 B 5 6 D RN 601 U 606-B VTL 5C4 A U 604 27K R 643 R 644 27p 12.1K-.5W .10 4.7K464 13 12 5 6 11 1 3 4 2 220-10NP C 617 THERMAL MUTE 8 10 TO +70 V RAIL 330K 1N4735 6.2 V D 613 27pC 626 SH-004101-02 3 K SH-004101-02 K SH0800K3.FCD 1N4735 6.2 V1N 4148 1N 4148 D 609 D 610 D 611 RadioFans.CN 收音机爱 好者资料库 SIG. GND + INPUT - INPUT 1K THERM BUS, 0-8V PWR-ON, 0-15V 10uF + 2N4410 PWR GND SPKR SIGNAL, 5V PK CLIP-LIM BUS, 0-4V MUTE BUS, 0-8V 5532 10K 100p 100p 1.5K REG. -15V SIG. GND SIG. GND + INPUT - INPUT THERM BUS, 0-8V PWR-ON, 0-15V SPKR SIGNAL, 5V PK CLIP-LIM BUS, 0-4V MUTE BUS, 0-8V SIG. GND PWR GND C101 RN101 10K D(C) 10K B 10K C(D) 10K A C102 R102 U101 B 4 8 5 6 7 1 2 3 5 VR101 11 23 19 15 21 17 Q103 R112 C108 4 6 7 8 24 19 16 18 14 GAIN CH 2 PINS NOTES 1. ALL RESISTORS 1/4 WATT UNLESS SPECIFIED. 2. ALL CAPACITORS 25V UNLESS SPECIFIED. 3. CH 2 RESISTOR NETWORK SECTIONS ( ) WHEN DIFFERENT. 4. CH 1 COMPONENTS NUMBERED 101-199 5. CH 2 COMPONENTS NUMBERED 201-299. 6. PARTS IN COMMON TO BOTH CHANNELS NUMBERED 1-99. 7. U102, 202 ROHM BA6124 OR SAMSUNG KA2284/85 13 GRN 1K-D RN103 LD105 PWR ON BA6124 100 YELYEL 10uF 330K R105 LD103 U102 C105 R107 536 R108 LEVEL -30 -10 LD104 10K R106 10uF C106 3.9K R109 RN 104 1K-C -24V +24V AC RELAY 2 AC RELAY 1 REG. +15V 25 26 10 9 12 J 1 26-PINS SCHEMATIC, EX-SERIES DISPLAY BOARD. 8. LD 101, 102, HIGH-EFFICIENCY RED LED. 9. LD 103, 104, HIGH-EFFICIENCY YELLOW LED. 10. LD 105, HIGH-EFFICIENCY GREEN LED. 22 PC-004001-00, REV A. EX-SERIES DISPLAY BOARD SCHEMATIC DIAGRAM 1 OF 1 PAT QUILTER 6-19-90 A PROD REL PER ECO 756 1K-D R113 634 B REVISED PER ECO 1603 WR 6-19-90 SH-004001-00 1 B SH-004001-00 B FCAD: 004001SHSH4001B1.FDC 9-29-92 10uf 10uf + + 4.7uf NP 5532 1K536 A R110 R103R104 C2 C1 C107 U101 A 1 2 3 PWR GND PWR GND SPKR SIGNAL, 5V PK CLIP-LIM BUS, 0-4V RED 100 MPS2907 .0033 1N4004 2N 4410 14 12 9 RN102 10K-D(A) 10K-C(B) 10K-B(C) 10K-A(D) Q102 Q101 D101 R101 LD101 RN103 1K-C 1K-B 1K-A 5 6 MUTE BUS, 0-8V C103 + 470 10V C104 RED LD102 LIM-CLIP 1.5K R111 1K-B 1K-A C 109 10uF Q 104 2N 4410 4.7K THERM BUS 0-8V TO AMP +INPUT TO AMP -INPUT Vcc SENSE R SIG. GND 13 10 11 3 7 8 -15V REG +24V UNREG -24V UNREG 2 1 4 J101, 201 14-PINS +15V REG TEMP-PROT RadioFans.CN 收音机爱 好者资料库 CH 1 +IN J 31 CH 1 -IN GND CH 2 -IN CH 2 +IN J 32 GND GND CH 1 SPKR SIG GND GND -24 V +24 V -15 V REG +15 V REG GND GND CH 1 MUTE CH 2 MUTE CH 1 PWR-ON CH 2 PWR-ON CH 1 CLIP-LIM CH 2 CLIP-LIM 1. ALL RESISTORS 1/4W, 5%. 2. ALL CAPACITORS 100V 3. J 32, 26-PIN CONNECTOR, TO J 1 ON FRONT DISPLAY BOARD PC-004001-00. 4. PARTS FOR CH 1 NUMBERED 301-399. 5. PARTS FOR CH 2 NUMBERED 401-499. 6. PARTS IN COMMON TO BOTH CHANNELS NUMBERED 31-49. 8. PARTS WITHIN DOTTED OUTLINE FOR USER MODIFICATION. SEE MANUAL. SCHEMATIC, EX-SERIES STANDARD INPUT BOARD. 7. BOARD SHIPPED WITH W 301-304, W 401-404 MOUNTED AS SHOWN. 470 p470 p W 303 W 304 SHIPPED XLR PIN 2 HI MOVE W 303, 304 TO ALT POSITION FOR PIN 3 HI 470 p470 pSHIPPED XLR PIN 2 HI MOVE W 303, 304 TO ALT POSITION FOR PIN 3 HI C 402C 401 W 403 W 404 SW 31 INPUTS PARALLEL MONO-BRIDGE W 401 PIN 1 V+A PIN 2 SP-A PIN 3 GND PIN 8 GND PIN 4 +1N A PIN 5 +OUT A PIN 6 -IN A PIN 7 -OUT A PIN 9 CLIP KEY PIN 10 V-A PIN 11 V- B PIN 12 CLIP B PIN 13 GND PIN 14 -0UT B PIN 15 -IN B PIN 16 +OUT B PIN 17 +IN B PIN 18 GND PIN 19 SP-B PIN 20 V+B PIN 21 SPARE PIN 22 SPARE W 301 T 301 3 (4) 1 (1)4 (5) 6 (8) T 401 1 (1) 3 (4)6 (8) 4 (5) W 402 A NC R 301 C 303 C 403 R 401 NC A CH 1 THERMAL CH 2 THERMAL CH 1 AC RELAY CH 2 AC RELAY CH 2 SPKR SIG PADS FOR LEVEL 1-A OR 2-A ACCESSORY PCB W 305 W 306 W 406 W 405 A 3-POS XLR 2 3 1 A J 301 A XLR 2 3 1 A J 401 J 33 A (6, 7) A (6, 7) W 302 R 31 R 32 24K 220p C 31 -INPUT CH 1 +INPUT CH 1 -INPUT CH 2 +INPUT CH 2 4. NO CHANGE IN PINOUT OF J32, PINS 1-26 20.0 K CENTER STEREO NOTES, ALL REV LEVELS NOTES, REV LEVELS A-B 1. THE FIRST YEAR OF PRODUCTION EX AMPLIFIERS SHIPPED WITH PC-004002-00 REV A OR B C 302C 301 2. FOR PC-004005-00 REV A, ADDED PADS 1-20 FOR LEVEL 1-A, 2-A INPUT ACCESSORY PCB 5. SW-31 WAS REVISED ON PC-004005-00 REV A, BUT WILL NOT AFFECT FUNCTION OF UPPER SLOT PCB. 3. ADDED J33, 5-PIN I