QSC EX 800 Schematics
This is the 6 pages manual for QSC EX 800 Schematics.
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Extracted text from QSC EX 800 Schematics (Ocr-read)
Page 1
2200 35V -15 V REG -24 V UNREG 100 +24 V UNREG +15 V REG 7815 3 21 1N4746, 18V 1N4746, 18V 100 2200 35V 7915 32 1 +24 V +15 V -15 V -24 V -24 V 24 V BRUSHLESS FAN 2.7K 2.7K2.7K 2.7K47K .01 U 52 D 53 D 52 U 51C 54 C 53 C 56 C 55D 51RN 51C 52 Q 52 2N2907 Q 53 2N4410 R 52R 51 C 57C 51 Q 51 2SC3298B 18 Vac 1 18 Vac 2 CT 3 PTC-60C THERMALLY CONNECTED XF PTC XF PTC TO Q 607 J 51 R 698 1N4004 BR 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 ENABLE TRANSFORMER THERMAL SENSOR THERMAL 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-004002-00DISPLAY PCB INPUT PCB SPKR PCB101-199 201-299 1-29 301-399 401-499 31-49 501-599 601-699 51-69 701-799 801-899 71-99 901-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 POINTS ETCJ 502-1 CH-1 CH 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-004101-00 AMP PCB PC-004103-00 AC PCB3. 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 ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL TO SHEET 3 5 4 AB C D AUDIO PRODUCTS PHQ 5-15-91 1 3 SCHEMATIC EX 800 DRAWING B PROD RELEASE PER ECO 1107 GLF C REVISED PER ECO 1158L G. 7-9-91 SA/SGM 5-29-91SGM SGM 5-29-91 W.R. / D REVISED PER ECO 1128 RDS A 3.3-1WR 53 HEAT SINK GROUND AUDIO AND POWER GROUNDS EL G REVISED PER ECO 12627-26-91 SGM RE-000006-PT RESISTANCE 100 OHM COLD, RISING AT 55 C. QSC P/N RE-000006-PT SGM 11-6-91 6-10-92 F REVISED PER ECO 1508 SGM APPLICATION USED ON NEXT ASSY WP-004101-20 EX800SGM G REVISED PER ECO 1602 WR 10-22-92 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 H REVISED PER ECO 2009L G. /RAB 180K J REVISED PER ECO 2371 MP (EFF. 7-28-94)5-11-94 SGM FAN BLK FAN RED SH-004101-02 1 K SGM K REVISED PER ECO 2393 MP (EFF. X-28-94)7-20-94 SH-004101-02 K SCH800J1.FCD SH0800K1.FCD C51 - 57, C526, 626
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A SPKR SIGGND GND GND A470-1W CLIP 10K-2W 470-10V 470-10V 10K-2W TO +15V TO +15 V TO -15 V 5K 5K SPEAKER BUS 1N4004 10-25V TO -24 V 470-1W PTC-60CTHERMALLY CONNECTED T 6 +15 V T15 -15 V T16 PROCESSING BUFFER50C +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 +15VMUTING 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 PROTECT SHUTDOWN DETECTORS TO MUTING DC PROTECT SENSE T10 THERMAL LIMITING T11 IDLE -1.2V CLIP +3V PEAKS 0-3Vac NORMAL AUDIO 4.5-6.5Vac CLIPPING PEAKS MUTE +4.5V LIMITING THRESHOLD +4.5VCLIP 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 503VR 502R 529 C 518U 503 R 527C 515 C 514 C 516 R 531 47-50V 47-50VD 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 22-1W4.7-1W 4.7-1W 2SA1306B 2SC3298B .103.9-2W 1N5402 2uH .10 HEATSINK GROUND AUDIO OUTPUT STAGE .22-3W 3 PL3 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 502-8J 501 6-PIN MATE-LOK 3 4 6 1 2 5 C 511BR 501 F 501 F 503 K 501 Q 502 R 504 R 502 Q 501 R 519 R 518R 520 R 521 R 522 Q 508 Q 509 Q 510D 508 Q 505 Q 506 Q 507 R 516 R 515 R 517D 507L 501 R 525 C 506 R 524 C 5075.6-2W R 523 D 501 JUMPER +70 V -70 VTO -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 ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL TO SHEET 1 J 52-5 J 52-6 2 OF 3 390 390 R 532, 47K +INPUT GND REF PWR-ON AUDIO INPUT STAGEHEAVY LINE SHOWS MAIN SIGNAL PATHSPEAKER BUS 47K-1WR 533VTL 5C4 U 504 68 p A 5532 10K-4 75K 47 BA 3 5 68 47 +15 V -15 V DC2 1 A .0022 47-10NP C 525 U 506-B R 541 RN 501 U 506-AC 520C 521 R 538 R 536 R 537 C 524 R 540 C 522 R 539 A 7 9 14 590 R 544 27K 4.7 K 46427p 12.1K-.5W .10 220-10NPC 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 VD 513 27p C 526 SH-004101-02 2 K SH-004101-02 K SH0800K2.FCD 1N4735 6.2 VD 511 D 509 1N 4148 D 510 1N 4148