QSC 3200, 3350, 3500, 3800 Service manual

Series III

Power Amplifiers

TECHNICAL SERVICE MANUAL

3200



 3350

 3500

REV. B

 3800

*TD-300001-AX*

SERVICE MANUAL

Series Three

Power Amplifiers

QSC Audio Products Inc.

Technical Services Group

Toll Free: 800-772-2834 Local: 714-957-7150 Fax: 714-754-6173

QSC Audio Products, Inc.

1675 MacArthur Blvd.

Costa Mesa, CA 92626

www.qscaudio.com

tech_support@qscaudio.com

SERIES THREE POWER AMPLIFIERS

Product Specifications 5

Model 3200 5 Model 3350 6 Model 3500 7 Model 3800 8

Series Three Parts Lists 9

3200 PCB ASSEMBLY 9 3350 PCB ASSEMBLY 11 3500 PCB ASSEMBLY 13 3800 MAIN NPN PCB ASSEMBLY 15 3800 MAIN PNP PCB ASSEMBLY 16 3800 GAIN PCB ASSEMBLY 17

Series Three Power Amplifiers 18

Circuit Description 18

Block Diagram 18 Detailed Explanations 18

Troubleshooting Chart 23

Introduction 23

1. Current Draw Section 23

2. Protection Circuit Problems 24

3. Faults With Signal Present 25

Series Three Test Procedures: 29

Model 3200 29 Model 3350 31 Model 3500 33 Model 3800 35

Series Three Schematics 37

Model3200 37 Model 3350 38 Model 3500 Early Version 39 Model 3500 Late Version 40 Model 3800 41

Series Three PCB Drawings 43

Model 3200 PCB 43 Model 3350 PCB 44 Model 3800 46A PCB 45 Model 3800 47A PCB 46 Model 3800 48B PCB 47 Model 3800 Gain PCB 48

Product Specifications

OUTPUT POWER (per channel)

Continuous Average Output Power both channels driven:

8 ohms, 20 Hz-20 kHz 0.1% THD 110 W

4 ohms, 20 Hz-20 kHz 0.1% THD 140 W

1 kHz 1% THD 200 W

2 ohms, 1 kHz 1% THD NR

Bridged Mono operation:

16 ohms, 20 Hz-20 kHz 0.1% THD 220 W

8 ohms, 20 Hz-20 kHz 0.1% THD 280 W

1 kHz 1% THD 400 W

4 ohms, 1 kHz 1% THD NR

Distortion: THD – 20 Hz-20 kHz from 250 milliwatts to rated

power shall be less than 0.1%, 0.015% typical. SMPTE-IMD less than 0.020% 250 milliwatts to rated power.

Frequency Response: 20 Hz-10 kHz ± 0.1 dB

8 Hz-300 kHz +0/-3 dB

Damping Factor: Greater than 200

Dynamic Headroom: 3.0 dB at 8 Ω

Noise: -100 dB 20 Hz-20 kHz

Sensitivity: 1V RMS for rated power (8 Ω)

Input Impedance: 20 kΩ

Controls:

Indicators: Bi-color LED indicating DC power –

Connectors: XLR, ¼” (ring, tip, sleeve) and 3 terminal

1 kHz 1% THD 135 W

1 kHz 1% THD 270 W

Front – Flush detented gain control, recessed AC switch and AC circuit breaker for each channel. Rear – Mono-bridging and accessory module switches.

OK/Protect mode, LED clip indicator, -30 dB and -6 dB signal level indicators, flashing overtemp indicators.

barrier strip inputs wired in parallel, 2-terminal barrier strip and 5-way binding post outputs wired in parallel, octal input sockets provided for input transformers or active accessories, ground lift terminal block.

Model 3200

Cooling: Passive cooling combined with high efficiency

output stage for reduced operating temperatures. Unique circuit configuration allows direct metal mounting of output devices for reduced thermal stress from short-term peaks.

Amplifier Protection: Indefinite short circuit*, open circuit,

over-temp, ultrasonic and RF protection. Stable into reactive and mismatched loads. Inputs protected from overload. All protection completely independent on each channel.

*Output Averaging short circuit protection

(U.S. Pat. 4,321.554)

Load Protection: Individual channel Load Grounding

output relays provide DC Fault, 3 second delayed turn on (transient protection), and excessive low frequency protection, Instant turn-off, pop suppression and power interrupt protection is also provided.

Output Circuit Type: Full complementary two-level high

efficiency.

Output Devices (total): 8

Power Supply: Two completely separate power supplies

including AC switches and AC circuit breakers; only AC cord is common.

Power Requirements: 120 Volts, 60 Hz, 4.4 A

Dimensions: Faceplate 19” × 1.75” Depth (behind mtg,

with rear support) 16.5” Depth (chassis) 14.6”

Weight: Shipping (lbs.) 31 Net (lbs.) 26

Model 3350

OUTPUT POWER (per channel)

Continuous Average Output Power both channels driven:

8 ohms, 20 Hz-20 kHz 0.1% THD 200 W

4 ohms, 20 Hz-20 kHz 0.1% THD 300 W

1 kHz 1% THD 420 W

2 ohms, 1 kHz 1% THD 450 W

Bridged Mono operation:

16 ohms, 20 Hz-20 kHz 0.1% THD 400 W

8 ohms, 20 Hz-20 kHz 0.1% THD 600 W

1 kHz 1% THD 840 W

4 ohms, 1 kHz 1% THD 900 W

Distortion: THD – 20 Hz-20 kHz from 250 milliwatts to rated

power shall be less than 0.1%, 0.015% typical. SMPTE-IMD less than 0.020% 250 milliwatts to rated power.

Frequency Response: 20 Hz-10 kHz ± 0.1 dB

8 Hz-300 kHz +0/-3 dB

Damping Factor: Greater than 200

Dynamic Headroom: 3.0 dB at 4 ohms

Noise: -100 dB 20 Hz-20 kHz

Sensitivity: 1 V RMS for rated power (8 Ω)

Input Impedance: 20 kΩ balanced or unbalanced

Controls:

Indicators: Bi-color LED indicating DC power –

Connectors: XLR, ¼” (ring, tip, sleeve) and 3 terminal

1 kHz 1% THD 260 W

1 kHz 1% THD 520 W

Front – Flush detented gain control, recessed AC switch and AC circuit breaker for each channel. Rear – Mono-bridging and accessory module switches.

OK/Protect mode, LED clip indicator, -30 dB and -6 dB signal level indicators, flashing overtemp indicators.

Cooling: Passive cooling combined with high efficiency

output stage for reduced operating temperatures. Unique circuit configuration allows direct metal mounting of output devices for reduced thermal stress from short-term peaks.

Amplifier Protection: Indefinite short circuit*, open circuit,

over-temp, ultrasonic and RF protection. Stable into reactive and mismatched loads. Inputs protected from overload. All protection completely independent on each channel.

*Output Averaging short circuit protection

(U.S. Pat. 4,321.554)

Load Protection: Individual channel Load Grounding

Output Circuit Type: Full complementary two-level high

efficiency.

Output Devices (total): 16

Power Supply: Two completely separate power supplies

including AC switches and AC circuit breakers; only AC cord is common.

Power Requirements: 120, 220, or 240 Volts, 50 Hz-60 Hz,

8 A (each channel)

Dimensions: Faceplate 19” × 3.5” Depth (behind mtg,

with rear support) 17.9” Depth (chassis) 15.9”

Weight: Shipping (lbs.) 46 Net (lbs.) 41

Model 3500

OUTPUT POWER (per channel)

Continuous Average Output Power both channels driven:

8 ohms, 20 Hz-20 kHz 0.1% THD 300 W

4 ohms, 20 Hz-20 kHz 0.1% THD 450 W

1 kHz 1% THD 560 W

2 ohms, 1 kHz 1% THD 700 W

Bridged Mono operation:

16 ohms, 20 Hz-20 kHz 0.1% THD 600 W

8 ohms, 20 Hz-20 kHz 0.1% THD 900 W

1 kHz 1% THD 1120 W

4 ohms, 1 kHz 1% THD 1400 W

Distortion: THD – 20 Hz-20 kHz from 250 milliwatts to rated

power shall be less than 0.1%, 0.015% typical. SMPTE-IMD less than 0.020% 250 milliwatts to rated power.

Frequency Response: 20 Hz-10 kHz ± 0.1 dB

8 Hz-300 kHz +0/-3 dB

Damping Factor: Greater than 200

Dynamic Headroom: 3.0 dB at 4 Ω

Noise: -100 dB 20 Hz-20 kHz

Sensitivity: 1 V RMS for rated power (8 Ω)

Input Impedance: 20 kΩ balanced or unbalanced

Controls:

Indicators: Bi-color LED indicating DC power –

Connectors: XLR, ¼” (ring, tip, sleeve) and 3 terminal

1 kHz 1% THD 350 W

1 kHz 1% THD 700 W

Front – Flush detented gain control, recessed AC switch and AC circuit breaker for each channel. Rear – Mono-bridging and accessory module switches.

OK/Protect mode, LED clip indicator, -30 dB and -6 dB signal level indicators, flashing overtemp indicators.

Cooling: Passive cooling combined with high efficiency

output stage for reduced operating temperatures. Unique circuit configuration allows direct metal mounting of output devices for reduced thermal stress from short-term peaks.

Amplifier Protection: Indefinite short circuit*, open circuit,

over-temp, ultrasonic and RF protection. Stable into reactive and mismatched loads. Inputs protected from overload. All protection completely independent on each channel.

*Output Averaging short circuit protection

(U.S. Pat. 4,321.554)

Load Protection: Individual channel Load Grounding

Output Circuit Type: Full complementary two-level high

efficiency.

Output Devices (total): 24

Power Supply: Two completely separate power supplies

including AC switches and AC circuit breakers; only AC cord is common.

Power Requirements: 120 Volts, 60Hz, 12 A

Dimensions: Faceplate 19” × 3.5” Depth (behind mtg,

with rear support) 17.9” Depth (chassis) 15.9”

Weight: Shipping (lbs.) 55 Net (lbs.) 50

Model 3800

OUTPUT POWER (per channel)

Continuous Average Output Power both channels driven:

8 ohms, 20 Hz-20 kHz 0.1% THD 375 W

4 ohms, 20 Hz-20 kHz 0.1% THD 600 W

1 kHz 1% THD 750 W

2 ohms, 20 Hz-20 kHz 0.2% THD 850 W

1 kHz 1% THD 1100 W

Bridged Mono operation:

16 ohms, 20 Hz-20 kHz 0.1% THD 720 W

8 ohms, 20 Hz-20 kHz 0.1% THD 1200 W

1 kHz 1% THD 1500 W

4 ohms, 20 Hz-20 kHz 0.2% THD 1700 W

1 kHz 1% THD 2200 W

Distortion: THD – 20 Hz-20 kHz at rated power shall be less than

0.1%. SMPTE-IMD less than 0.025% at rated power.

Frequency Response: 20 Hz-10 kHz ± 0.1 dB

8 Hz-300 kHz +0/-3 dB

Damping Factor: Greater than 200

Dynamic Headroom: 2 dB at 4 Ω

Noise: -100 dB 20 Hz-20 kHz

Sensitivity: 1 V RMS for rated power (8 Ω)

Input Impedance: 20 kΩ balanced or 10 kΩ

Controls:

Indicators: Bi-color LED indicating DC power –

1 kHz 1% THD 440 W

1 kHz 1% THD 880 W

unbalanced

Front – Flush detented gain control, recessed AC switch and AC circuit breaker for each channel. Rear – Mono-bridging and accessory module switches.

OK/Protect mode, LED clip indicator, -30 dB and –6 dB signal level indicators, flashing over-temp indicators.

Cooling: Passive cooling combined with high efficiency

output stage for 50% reduction in dissipated heat. Unique circuit configuration provides direct-metal mounting of output devices to minimize short-term thermal excursions of power transistors. Fan-assisted cooling recommended for high duty cycles at 2 ohms.

Amplifier Protection: Indefinite short circuit*, open circuit,

over-temp, ultrasonic and RF protection. Stable into reactive and mismatched loads. Inputs protected from overload.

*Output Averaging short circuit protection

(U.S. Pat. 4,321.554)

Load Protection: Individual channel output relays

provide DC Fault, 3 second delayed turn-on (transient protection), and excessive lowfrequency protection. Instant turn-off, pop suppression and power interrupt protect is also provided..

Output Circuit Type: Full complementary two-level high

efficiency.

Output Devices (total): 40

Power Supply: A complete separate power supply for each

channel including AC switch/circuit breaker and AC cord.

Power Requirements: 120, 220, or 240 Volts, 50 Hz-60 Hz,

13 A (each channel)

Dimensions: Faceplate 19” × 5.25” Depth (behind mtg,

with rear support) 17.9” Depth (chassis) 15.9”

Weight: Shipping (lbs.) 75 Net (lbs.) 83

Series Three Parts Lists

3200 PCB ASSEMBLY

WP-320038-PO 3200 MAIN PCB ASSY WP-320038-PO 3200 MAIN PCB ASSY

Part Number Description Reference Part Number Description Reference

SC-062050-PP #6 X 5/16" P/P ZINC Q5, Q6, PL-903125-SP SPACER, ROUND, NYLON 0.047 R14

Q7, Q8 PL-000220-MI Q1, Q2, SW-000010-RY MX1500/3500 24V OUTPUT RELAY D19, D20 WC-0.6022-JW .6" JUMPER, WHITE J3, J6, PL-905385-SP SPACER RND, NYL #6 0.385"L B LD1, LD2,

J7, J10 LD3, LD4, WC-0.8022-JW .8" JUMPER, WHITE J2, J11 LD5 WC-001102-SQ INSUL.SLEEVE QSC 1102,.6" CL WC-1.1022-JW 1.1 JUMPER WHITE 22GA J4, J5 LD3, LD4, XF-200010-RL INDUCTOR 2UH W/10 OHM AXIL L1, L2 LD5 IC-005532-OP OP DUAL NE5532 PT-110000-AT TRIM 100 OHM TR1 LB-100003-SR ON SUBPANEL PT-210000-AT 1K OHM TRIMPOT TR2, TR3 LB-376002-MP ON SUBPANEL QD-000134-LR LED RED T-1 3/4 LD1, LD2 MS-320310-HS HEAT SINK QD-000134-LX LED R/G T-1 3/4 LD5 MS-320372-SP SUBPANEL QD-000134-LY LED YEL T-1 3/4 LD3, LD4, PL-090751-RV RIVET, FASTEX ON HEAT SINKS QD-0003.9-ZT ZENER 3.9V .25W DZ84073ID Z25 PT-350000-AT 50K DET GAIN POT QD-0004.7-ZT ZENER 4.7V .25W DZ840731E Z24 QD-050200-BX 5A 200V BRIDGE RECTIFIER B3, B4 QD-0007.5-ZT ZENER 7.5V .25W DZ840731F Z26 SC-061041-SP #6-32 X 1/4" SCREW SUBPANEL MTG. QD-000424-TX 2SD424 XSTOR NPN TO-3/TO-204 SC-062050-PP #6 X 5/16" P/P ZINC SUPBANEL MTG QD-000554-TX 2SB554 XSTOR PNP TO-3/TO-204 SC-062081-PO #6X1/2 B P/P OVAL BLACK HEAT SINKS MTG QD-000810-DX DIOD 100V 8A 35NS MUR810 D19, D20 CA-033100-CM 33PF, 100V, 5%, MICA C2 QD-001340-LR LED RED T-1 3/4 VREF LD6 CA-147100-BD 470PF, 100V, 10%, DISK C11, C12, QD-004004-DX DIODE RECT DO41 400V 1A D4, D7,

CA-210100-BP .001UF, 100V, 10%, MYLAR C1, C9, D9, D18

CA-222100-BP .0022UF,100V,10%,MYLAR C3 Q14 CA-347050-BP .047UF, 50V, 10%, MYLAR C7, C8 QD-004744-ZA ZENER 15V, 1W, 5%, 1N4744A Z21, Z22 CA-410100-BP .1UF, 100V, 10%, MYLAR C5 QD-004934-DX DIODE100V 1A 200NS VP 1N493 D1, D2, CA-422100-CP .22UF, 100V, 5%, MYLAR C4 D3, D5, CA-610035-BE 10UF, 35V, ELEC., RADIAL E7 D6, D10, CA-647010-BN 47UF, 10V, 10% RADIAL,CAPLYT CA-647035-BE E5 D14. D16, CA-722010-BN 220UF 10V CAPACITOR E6 D17 CA-722025-BE 220UF, 25V, ELECT., RADIA E1, E2 QD-008599-TX BJTP 60V .5A .625W MPS8599 Q10 Q11, CA-747010-BE 470UF, 16V, ELEC., RADIA E3 Q12, Q15 CA-822080-BE 2200UF 80V ELEC. CAPACITOR E8, E9, QD-015030-TM Q1, Q3

CA-833050-BE 3300UF 50V CAPACITOR E13, E14 QD-1.5200-BX DIODE BRIDGE RECT 200V, 1.5A B1, B2 CO-000008-IC SOCKET 100 8-PIN DIP RE-.27005-EM 2.7 2W 5% MOFP R32, R33 CO-520258-MJ 6 COND. MOD JACK RE-.33005-DM 3.3 1W 5% MOFP R12, R13 CO-641119-AH HDR 156 8-PIN RAMP LOCK PREF RE-.56005-BC 5.6 1/4W 5% CF R10 HW-060080-PS #6-32 X 8 PEM STUD RE-000000-PT 90 C PTC RESISTOR PTC MS-000006-TG IN ALL LOCATIONS SHOWN AS GREASE RE-000050-NR NTC THERMISTOR, 50 OHM R14 MS-320311-HT RE-002205-DM 22 1W 5% MOFP R27, R28, NW-000220-RW TO-220 RECT. WASHER Q1, Q2, R29, R30

NW-060010-SL #6 SPLIT TOOTH LOCK WASHER Q1, Q2, R24, R47

NW-060400-HN #6-32 BY 1/4" HEX NUT Q1, Q2, RE-068005-EM 680 OHM,2 W,MET OX,5%,RES R34

NW-060410-ST LCKWSH ON HEAT XFER BRKT PEMS NEAR POT RE-125005-HW 2.5K OHM, 5W, WIREWOUND 10% R37, R38 PC-000038-EM RE-127005-BC 2.7K 1/4 W 5%WW R41, R42

PTC PL-909235-SP HOLDER, LED, 90 DEGREES, NY LD1, LD2,

Q6, Q8 Q5, Q7

C13, C14 D8,

C10, C15 QD-004410-TX BJTN 80V .25A 1.5W 2N4410 Q9, Q13,

E4 D11, D13,

E10, E11 QD-015031-TM Q2, Q4

D19, D20 RE-010005-BC 100 1/4W 5% CF R11, R23,

Q5, Q6, RE-015005-BC 150 1/4W 5% CF R43, R44

Q7, D19, RE-033201-BM 332 1/4W 1% MF R8

D20, PTC RE-030005-NW R36

Q5, Q6, RE-082005-BC 820 1/4W 5% CF R21, R22

Q7, D19, RE-110005-BC 1K 1/4W 5% CF R5, R16

D20, PTC, RE-115005-BC 1.5K 1/4 W 5% CF R25, R26

PEM STD(2) RE-115005-EM 1.5K 2W 5% MOFP R35

3200 PCB ASSEMBLY, Cont'd

WP-320038-PO 3200 MAIN PCB ASSY

Part Number Description Reference

RE-139005-CC R31 RE-147005-DM 4.7K 1W 5% MOFP R15 RE-151005-BC 5.1K 1/4W 5% CF R6 RE-210001-BM RESISTOR, MF 10. OK 1% 1/4 R1, R2,

R3, R4 RE-212101-CM 12.1K 1/2W 1% MF R7 RE-210005-BC 10K OHM, 1/4W, CARBON 5% R45 RE-230005-BC 30K 1/4W 5% CF R46 RE-242201-BM RESISTOR,42.2K,1/4W,MET FM 1 RE-239005-BC 39K,1/4W,CARBON 5% R20 RE-310005-BC 100K 1/4W 5% CF R48 RE-315005-BC 150K 1/4W 5% CF R17 RE-333005-BC 330K 1/4W 5% CF R18, R19

3350 PCB ASSEMBLY

WP-335040-TC 3350 MAIN PCB ASSY WP-335040-TC 3350 MAIN PCB ASSY

Part Number Description Reference Part Number Description Reference

RE-230005-BC 30K 1/4W 5% CF R59 MS-000066-HS HEATSINK, TO-66 Q1, Q2 RE-260401-BM 60.4K 1/4W 1% MF R31 MS-000220-HS HEATSINK, TO-220 AAVID#5943B Q3, Q4 RE-310005-BC 100K 1/4W 5% CF R30, R62 MS-350411-HT HEAT TRANSFER BRKT. RE-333005-BC 330K 1/4W 5% CF R28, R29 NW-000220-RW TO-220 RECT. WASHER D21, D22 SC-060060-PP #6-32 X 3/8" P/P ZINC Q1, Q2 NW-060010-SL #6 SPLIT TOOTH LOCK WASHER Q1, Q2, SC-062050-PP #6 X 5/16" P/P ZINC Q5, Q6, D21, D22,

Q8, Q9, PTC

Q12, Q13, NW-060400-HN #6-32 BY 1/4" HEX NUT D21, D22,

Q15, Q16 PTC, PEM SW-000010-RY MX1500/3500 24V OUTPUT RELAY NW-060410-ST LCKWSHR-PEM STUD-HEAT XFER BRKT MTG. XF-200016-CR IND 2UH 16GA AIR L1, L2 PC-000040-FM MAIN PCB WC-001102-SQ INSUL.SLV QSC 1102,.6", CLR PTC PL-000220-MI D21, D22 WC-003018-TQ BLUE, FROM HOLE POS. #1&2 TO B4 PL-903125-SP SPACER, ROUND, NYLON 0.047 L1, L2, WC-003019-TQ BRN., FROM HOLE POS. #3&4 TO B3 R14 WC-003020-TQ RED, FROM HOLE POS. 'P HI' TO B4 'P HI' PL-905385-SP SPACER RND, NYL #6 0.385"L B LD1, LD2, WC-003021-TQ GRN, FROM HOLE POS. 'N HI' TO B4 'N HI' LD3, LD4, WC-003022-TQ ORG, FROM HOLE POS. 'P LO' TO B3 'P LO' LD5 WC-003023-TQ YEL, FROM HOLE POS. 'N LO' TO B3 'N LO' PL-909235-SP HOLDER, LED, 90 DEGREES, NY LD1, LD2, WC-003024-TQ BLK, FROM HOLE POS #5 TO #5 NEXT 50K POT LD3, LD4, PL-003109-SP OBS-NYLON SPACER D21, D22 LD5 NW-060010-SL #6 SPLIT TOOTH LOCK WSHR 25A BRIDGE RECT. PT-110000-AT TRIM 100 TR1 IC-005532-OP OP DUAL NE5532 PT-220000-AT TRIM 2K TR2, TR3 LB-100003-SR ON SUBPANEL QD-001340-LR LED RED T-1 3/4 VREF LD6 LB-376002-MP ON SUBPANEL QD-000134-LR LED RED T-1 3/4 LD1, LD2 MS-350410-HS HEAT SINK QD-000134-LX LED R/G T-1 3/4 LD5 MS-350472-SP SUBPANEL QD-000134-LY LED YEL T-1 3/4 LD3, LD4 SC-062120-PP #6 X 3/4" "B" P/P ZINC - 25A BRIDGE RECT QD-0003.9-ZT ZENER 3.9V .25W DZ84073ID Z15 PL-003.65-TW TIE WRAP, 4" BLACK ( SMALL) QD-0004.7-ZT ZENER 4.7V .25W DZ840731E Z16 PL-000011-TW TIE WRAP, 11" WHITE (LONG) QD-0007.5-ZT ZENER 7.5V .25W DZ840731F Z17 PL-090751-RV RIVET, FASTEX ON HEAT SINK QD-000424-TX 2SD424 NPN TO-3/TO-204AA Q12, Q13, PT-350000-AT 50K DET GAIN POT Q15, Q16 QD-250400-BX 25A 400V BRIDGE RECTIFIER B3, B4 QD-000554-TX 2SB554 PNP TO-3/TO-204AA Q5, Q6, SC-061041-SP #6-32 X 1/4" SCREW-SUBPANEL(3) 413 A/B(3) Q8, Q9 SC-062050-PP #6 X 5/16" P/P ZINC FOR SUBPANEL MTG. QD-000810-DX DIOD 100V 8A 35NS MUR810 D21, D22 SC-062081-PO #6X1/2 B P/P OVAL BLACK HEAT SINK MTG. QD-001847-TH SJ1847 PNP TO-66/TO-213AA Q2 CA-027100-BM OBS-27PF 10% 100V SM C2 QD-001848-TH SJ1848 NPN TO-66/TO-213AA Q1 CA-147100-BD 470PF, 100V, 10%, DISK C6, C8, QD-004004-DX DIODE RECT DO41 400V 1A D4, D7,

C12 D10, D17, CA-210100-BP .001UF, 100V, 10%, MYLAR C1 D18 CA-215200-BP .0015UF, 200V, 10%, MYLAR C3, C7, QD-004410-TX BJTN 80V .25A 1.5W 2N4410 Q17, Q20,

C11 Q23 CA-322100-BP .022UF, 100V, 10%, MYLAR C13 QD-004744-ZA ZENER 15V, 1W, 5%, 1N4744A Z13, Z14 CA-368100-BP .068UF, 100V, 10%, MYLAR C5 QD-004934-DX DIODE100V 1A 200NS VP 1N493 D1, D2, CA-410100-BP .1UF, 100V, 10%, MYLAR C9, C10 D3, D5, CA-415100-CP .15UF, 100V, 5%, MYLAR C4 D6, D8, CA-610035-BE 10UF, 35V, ELEC., RADIAL E7 D9, D11, CA-647010-BN 47UF, 10V, 10% RAD,CAP LYTIC E4 D12, D14, CA-647050-BE 47UF, 50V, ELECT., RADIAL E5 D15 CA-722010-BN 220UF 10V CAPACITOR E6 QD-008599-TX BJTP 60V .5A .625W MPS8599 Q18, Q19, CA-722025-BE 220UF, 25V, ELECT., RADIA E1, E2 Q21, Q22 CA-747010-BE 470UF, 16V, ELEC., RADIA E3 QD-015030-TM Q3 CA-822100-BE 2200UF 100V CAPACITOR E8, E9, QD-015031-TM Q4

E11, E12 QD-1.5200-BX DIODE BRIDGE RECT 200V, 1.5A B1, B2 CA-847050-BE 4700UF 50V CAPACITOR E14, E15 RE-.01505-FW .15 OHM 3W 10% RESISTOR R35, R36, CO-000008-IC SOCKET 100 8-PIN DIP R38, R39, CO-520258-MJ 6 COND. MOD JACK R42, R43, CO-641119-AH HDR 156 8-PIN RAMP LOCK PREF R45, R46 HW-060080-PS #6-32 X 8 PEM STUD RE-082005-BC 820 1/4W 5% CF R19, R22 MS-000006-TG IN ALL LOC SHOWN AS 'GREASE' RE-.27005-EM 2.7 2W 5% MOFP R49, R50

3350 PCB ASSEMBLY, Cont'd

WP-335040-TC 3350 MAIN PCB ASSY

Part Number Description Reference

RE-.33005-DM 3.3 1W 5% MOFP R25, R26 RE-.56005-BC 5.6 1/4W 5% CF R10 RE-.56005-EM 5.6 2W 5% MOFP R55 RE-000000-PT 90 C PTC RESISTOR PTC RE-000050-NR NTC THERMISTOR, 50 OHM R14 RE-001005-EM 10 2W 5% MOFP R56 RE-002205-DM 22 1W 5% MOFP R15, R16,

R17, R18 RE-010005-BC 100 1/4W 5% CF R11, R20,

R21, R61 RE-010005-CC 100 1/2W 5% CF R32 RE-033201-BM 332 1/4W 1% MF R8 RE-033005-HW 330 OHM 5 WATT WW 10% R52 RE-015005-BC 150 1/4W 5% CF R57, R58 RE-110005-BC 1K 1/4W 5% CF R5 RE-110005-EM 1K 2W 5% MOFP R47 RE-115005-BC 1.5K 1/4 W 5% CF R13, R23,

R24 RE-120005-EM 2K 2W 5% MOFP R48 RE-127005-HW 2.7K 5W 5% WW R33. R34 RE-151005-BC 5.1K 1/4W 5% CF R6 RE-147005-CC 4.7K,1/2W CARBON 5% RES R12 RE-168005-DM 6.8 OHM, 1W, MET. OXIDE 5% R27 RE-210001-BM RESISTOR, MF 10. OK 1% 1/4 R1, R2,

R3, R4 RE-210005-BC 10K OHM, 1/4W, CARBON 5% R60 RE-216901-CM 16.9K, 1/2W MET FM 1% RES R7

3500 PCB ASSEMBLY

WP-350040-PC 3500 MAIN PCB ASSY REV Q WP-350040-PC 3500 MAIN PCB ASSY REV Q

Part Number Description Reference Part Number Description Reference

RE-230005-BC 30K 1/4W 5% CF R59 CA-847050-BE 4700UF 50V CAPACITOR E14, E15 RE-275001-BM 75.0K 1/4W 1% MF R9 CA-122100-BD CAP 220PF 10% 100V DISK C7 RE-247005-BC 47K 1/4 W 5% CF R31 CA-310100-BP .01UF, 100V, 10%, MYLAR C9 RE-310005-BC 100K 1/4W 5% CF R30, R62 CO-000008-IC SOCKET 100 8-PIN DIP RE-333005-BC 330K 1/4W 5% CF R28, R29 CO-520258-MJ 6 COND. MOD JACK SC-060060-PP #6-32 X 3/8" P/P ZINC Q1, Q2 CO-641119-AH HDR 156 8-PIN RAMP LOCK PREF SC-062050-PP #6 X 5/16" P/P ZINC Q5, Q6, HW-060100-PS #6-32 X 20 PEM STUD P2, P3,

Q7, Q8, P4, P5

Q9, Q10, HW-060200-SP OBS-SPCR RND ALUM .25"ODX.1

Q11, Q12, HW-060080-PS #6-32 X 8 PEM STUD P1

Q13, Q14, MS-000006-TG IN ALL LOC SHOWN AS 'GREASE'

Q15, Q16 MS-000066-HS HEATSINK, TO-66 Q1, Q2 SW-000010-RY MX1500/3500 24V OUTPUT RELAY MS-000220-HS HEATSINK, TO-220 AAVID#5943B Q3, Q4 XF-200016-CR IND 2UH 16GA AIR L1, L2 CH-350208-GX HEAT TRANSFER BRKT. WC-001102-SQ INSUL. SLV QSC 1102,.6", CLR PTC NW-000220-RW TO-220 RECT. WASHER D21, D22 WC-003018-TQ BLUE, FROM HOLE POS. #1&2 TO B4 NW-060010-SL #6 SPLIT TOOTH LOCK WASHER Q1, Q2, WC-003019-TQ BRN., FROM HOLE POS. #3&4 TO B3 D21, D22, WC-003020-TQ RED, FROM HOLE POS. 'P HI' TO B4 'P HI' PTC WC-003021-TQ GRN, FROM HOLE POS. 'N HI' TO B4 'N HI' NW-060400-HN #6-32 BY 1/4" HEX NUT D21, D22, WC-003022-TQ ORG, FROM HOLE POS. 'P LO' TO B3 'P LO' PTC, PEM WC-003023-TQ YEL, FROM HOLE POS. 'N LO' TO B3 'N LO' NW-060410-ST LCKWSHR-PEM STUD-HEAT XFER BRKT MTG. WC-003024-TQ BLK, FOM HOLE POS #5 TI #5 NEXT 50K POT NW-060410-ET #6 EXTERNAL TOOTH LOCKWASHER PL-003109-SP OBS-NYLON SPACER D21, D22 PC-350040 MAIN PCB NW-060010-SL #6 SPLIT TOOTH LOCK WSHR BRIDGE RECT. PL-000025-PL 9222-PH140 AMATOM SPACER IC-005532-OP OP DUAL NE5532 PL-000026-PL TO-220 TEK-SIL INSULATOR D21, D22 LB-100003-SR ON SUBPANEL PL-903125-SP SPACER, ROUND, NYLON 0.047 L1, L2, LB-376002-MP ON SUBPANEL R14 MS-350410-HS HEAT SINK PL-905385-SP SPACER RND, NYL #6 0.385"L B LD1, LD2, MS-350472-SP SUBPANEL LD3, LD4, SC-062120-PP #6 X 3/4" "B" P/P ZINC-25A BRIDGE RECT. LD5 PL-003.65-TW TIE WRAP, 4" BLACK ( SMALL) PL-909235-SP HOLDER, LED, 90 DEGREES, NY LD1, LD2, PL-000011-TW TIE WRAP, 11" WHITE (LONG) LD3, LD4, PL-090751-RV RIVET, FASTEX ON HEAT SINK LD5 PT-350000-AT 50K DET GAIN POT PT-110000-AT TRIM 100 TR1 QD-250400-BX 25A 400V BRIDGE RECTIFIER B3, B4 PT-250000-AT TRIM 2K TR2, TR3 SC-061041-SP #6-32 X 1/4" SCREW-SUBPANEL(3) 413 A/B(3) QD-001340-LR LED RED T-1 3/4 VREF LD6 SC-062050-PP #6 X 5/16" P/P ZINC FOR SUBPANEL MTG. QD-000134-LR LED RED T-1 3/4 LD1, LD2 SC-062081-PO #6X1/2 B P/P OVAL BLACK HEAT SINK MTG. QD-000134-LX LED R/G T-1 3/4 LD5 CA-018100-CM CAP 18PF 100V 5% MICA C2 QD-000134-LY LED YEL T-1 3/4 LD3, LD4 CA-147100-BD 470PF, 100V, 10%, DISK C6, C8, QD-0003.9-ZT ZENER 3.9V .25W DZ84073ID Z15

C12 QD-0004.7-ZT ZENER 4.7V .25W DZ840731E Z16 CA-168100-BD 680PF, 100V, 10%, DISK C14, C15 QD-0007.5-ZT ZENER 7.5V .25W DZ840731F Z17 CA-210100-BP .001UF, 100V, 10%, MYLAR C1 QD-000424-TX 2SD424 NPN TO-3/TO-204AA Q11, Q12, CA-215200-BP .0015UF, 200V, 10%, MYLAR C3, C11 Q13, Q14, CA-322100-BP .022UF, 100V, 10%, MYLAR C13, C16 Q15, Q16 CA-368100-BP .068UF, 100V, 10%, MYLAR C5 QD-000554-TX 2SB554 PNP TO-3/TO-204AA Q5, Q6, CA-268100-CP OBS-.0068UF 100V 5% MYL C10 Q7, Q8, CA-412100-CP .12UF, 100V, 5%, MYLAR C4 Q9, Q10 CA-610035-BE 10UF, 35V, ELEC., RADIAL E7 QD-000810-DX DIOD 100V 8A 35NS MUR810 D21, D22 CA-647010-BN 47UF, 10V, 10% RAD,CAP LYTIC E4 QD-002763-TM 170-220V, 2A, TO-220, PNP Q2, Q4 CA-647050-BE 47UF, 50V, ELECT., RADIAL E5 QD-002762-TM 170V -200V, 2A TO-220, NPN Q1, Q3 CA-722010-BN 220UF 10V CAPACITOR E6 QD-004004-DX DIODE RECT DO41 400V 1A D4, D7, CA-722025-BE 220UF, 25V, ELECT., RADIA E1, E2 D10, D17, CA-747010-BE 470UF, 16V, ELEC., RADIA E3 D18 CA-822100-BE 2200UF 100V CAPACITOR E8, E9, QD-004410-TX BJTN 80V .25A 1.5W 2N4410 Q17, Q20,

E10, E11, Q23

E12, E13 QD-004744-ZA DIODE 15V, 1W, 5%, 1N4744A Z13, Z14

3500 PCB ASSEMBLY, Cont'd

WP-350040-PC 3500 MAIN PCB ASSY REV Q

Part Number Description Reference

QD-004934-DX DIODE100V 1A 200NS VP 1N493 D1, D2,

D3, D5,

D6, D8,

D9, D11,

D12, D14,

D15 QD-008599-TX BJTP 60V .5A .625W MPS8599 Q18, Q19,

Q21, Q22 QD-1.5200-BX DIODE BRIDGE RECT 200V, 1.5A B1, B2 RE-.01505-FW .15 OHM 3W 10% RESISTOR R35, R36,

R37, R38,

R39, R40,

R41, R42,

R43, R44,

R45, R46 RE-.39005-EM 3.9 2W 5% MOFP R49 RE-.33005-DM 3.3 1W 5% MOFP R25, R26 RE-.56005-BC 5.6 1/4W 5% CF R10 RE-.56005-EM 5.6 2W 5% MOFP R55, R50 RE-000000-PT 90 C PTC RESISTOR PTC RE-000050-NR NTC THERMISTOR, 50 OHM R14 RE-001005-EM 10 2W 5% MOFP R56 RE-002205-DM 22 1W 5% MOFP R15, R16,

R17, R18 RE-010005-BC 100 1/4W 5% CF R11, R20,

R21, R61 RE-018005-CC 180 1/2W 5% CF R32 RE-033201-BM 332 1/4W 1% MF R8 RE-045005-HW 450 OHM, 5 W, WIREWOUND 10% R52 RE-015005-BC 150 1/4W 5% CF R57, R58 RE-082005-BC 820 1/4W 5% CF R19, R22 RE-110005-BC 1K 1/4W 5% CF R5 RE-113005-EM 1.3K 2W 5% MOFP R47 RE-115005-BC 1.5K 1/4 W 5% CF R13, R23,

R24 RE-124005-EM 2.4K 2W 5% MOFP R48 RE-133005-HW 3.3K 5W 10% WW R33. R34 RE-151005-BC 5.1K 1/4W 5% CF R6 RE-156005-CC 5.6K 1/2W 5% RESISTOR R12 RE-168005-DM 6.8 OHM, 1W, MET. OXIDE 5% R27 RE-210001-BM RESISTOR, MF 10. OK 1% 1/4 R1, R2,

R3, R4 RE-210005-BC 10K OHM, 1/4W, CARBON 5% R60 RE-221501-CM 21.5K 1/2 WATT 1% MF R7

3800 MAIN NPN PCB ASSEMBLY

WP-380046-NP 3800 QSC46A MAIN PCB ASSY WP-380046-NP 3800 QSC46A MAIN PCB ASSY

Part Number Description Reference Part Number Description Reference

CA-147100-BD 470PF, 100V, 10%, DISK C4 WC-0.6022-JW .6" JUMPER, WHITE J1, J2, CA-210100-BP .001UF, 100V, 10%, MYLAR C3 J8 CA-368100-BP .068UF, 100V, 10%, MYLAR C2 WC-0.9022-JW JMPR INS 0.9" 22AWG SLD WHT J3, J4 CA-410160-BP CAP 0.1UF 160V 10% MYLAR C1 PL-003109-SP SLEEVE D5, D6 CA-822100-BE 2200UF 100V CAPACITOR E3, E4, WC-2.5018-JW JMPR INS 2.5" 18AWG SLD WHT J5, J6,

E5, E6 J7 CA-833080-BE 3300UF 80V 20% LYTIC E1, E2 XF-200014-CR INDUCTOR,ZOBEL 14 AWG,2UH L1, L2 HW-060080-PS #6-32 X 8 PEM STUD "P", D5,

D6 MS-000066-HS HEATSINK, TO-66 Q1, Q2 MS-350411-HT HEAT TRANSFER BRKT. NW-000220-RW TO-220 RECT. WASHER D5, D6 NW-060010-SL #6 SPLIT TOOTH LOCK WASHER Q1, Q2,

D5, D6 NW-060410-ST A-4 SPRING TOOTH LOCKWASHER "P" NW-060400-HN #6-32 BY 1/4" HEX NUT "P", D5,

D6 PC-000046-AM MAIN NPN BOARD PL-000220-MI D5, D6 PL-905100-SP SPACER, ROUND, NYLON, #6,0 L1, L2 PT-250000-AT RES VAR IT 5K 20% 0.15W CARB TR1 QD-0004.7-ZT ZENER 4.7V .25W DZ840731E Z1 QD-000424-TX 2SD424 NPN TO-3/TO-204AA Q3, Q4,

Q5, Q6,

Q7, Q8,

Q9, Q10,

Q11, Q12 QD-001847-TH SJ1847 PNP TO-66/TO-213AA Q1, Q2 QD-004934-DX DIODE100V 1A 200NS VP 1N493 D1, D2,

D3 QD-005402-DX DIODE RECT. 200V, 1N5402 D4 QD-008599-TX BJTP 60V .5A .625W MPS8599 Q13 QD-000810-DX DIOD 100V 8A 35NS MUR810 D5, D6 RE-.02205-FW 0.22, 3W, 10%, RES WW R23, R24,

R25, R26,

R27, R28,

R29, R30,

R31, R32 RE-.33005-DM 3.3 1W 5% MOFP R1 RE-001005-EM 10 2W 5% MOFP R12, R13,

R14, R15,

R16, R17,

R18, R19 RE-001505-DM 15 1W 5% MOFP R2, R3 RE-010005-BC 100 1/4W 5% CF R8 RE-015005-BC 150 1/4W 5% CF R6 RE-082005-BC 820 1/4W 5% CF R5 RE-115005-BC 1.5K 1/4 W 5% CF R7 RE-130005-HW 3K OHM, 5WATT, WIREWOUND R20 SC-060060-PP #6-32 X 3/8" P/P ZINC Q1, Q2 SC-062050-PP #6 X 5/16" P/P ZINC Q3, Q4,

Q5, Q6,

Q7, Q8,

Q9, Q10,

Q11, Q12

+ 33 hidden pages

QSC 3200, 3350, 3500, 3800 Service manual

Table of Contents

Product Specifications

Model 3200

Model 3350

Model 3500

Model 3800

Series Three Parts Lists