QSC PowerLight Series Technical & Service Manual
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QSC PowerLight Series Technical & Service Manual

Powerlight series two-channel power amplifiers
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Enlarged version
HEAR THE POWER OF TECHNOLOGY.
PowerLight 6.0 II
PowerLight 6.0
PowerLight 9.0
PowerLight™ Series
ON
PFC
OFF
PFC
Two-Channel Power Amplifiers
TECHNICAL SERVICE MANUAL
P R OT E C T
STA N D B Y
P O W E R
PFC
1 C H A N N E L 2
POWERLIGHT 9.0
9 0 0 0 W AT T P O W E R F A C T O R C O R R E C T E D P R O F E S S I O N A L A M P L I F I E R
1 - C H A N N E L - 2
22
22
20
24
20
24
C L I P
26
26
18
18
- 10 d B
14
28
14
28
- 2 0 d B
8
30
8
30
S I G N A L
-00
32
-00
32
dB
C L I P L I M I T E R
dB
*TD-000083-00*
TD-000083-00
Rev. Prelim.

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Summary of Contents for QSC PowerLight Series

  • Page 1 PowerLight™ Series HEAR THE POWER OF TECHNOLOGY. Two-Channel Power Amplifiers TECHNICAL SERVICE MANUAL PowerLight 6.0 II 1 - C H A N N E L - 2 C L I P P R OT E C T STA N D B Y - 10 d B PowerLight 6.0 P O W E R...
  • Page 3 PowerLight 9.0 IMPORTANT NOTICE: This document contains proprietary information that is the property of QSC Audio Products, Inc, and may not be disclosed, reproduced or used without express or written consent from QSC Audio Products. QSC Audio Products, Inc. Technical Services Group...
  • Page 4 PowerLight 9.0 PowerLight 6.0 PowerLight 9.0 II QSC Audio Products, Inc. TD-000083-00...

  • Page 5: Table Of Contents

    Input PCB Assembly (QSC part # WP-000175-00) .................................... 41 Input Daughterboard Assembly (QSC part # WP-000178-00) ................................42 Audio Channel Module Assembly (QSC part number WP-000276-00) ............................. 42 Audio Channel Module Assembly (QSC part # WP-000182-00) ............................... 46 Power Supply Assembly (QSC part # WP-000266-00) ..................................50 Power Supply Assembly (QSC part # WP-000266-02) ..................................

  • Page 6: Performance Specifications

    Pink noise at 1/8 of full power; analogous to typical program with occasional clipping. Pink noise at 1/3 of full power; analogous to typical program with heavy clipping. Continuous sine wave at threshold of clipping (1% THD). US patents pending SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE QSC Audio Products, Inc. TD-000083-00...

  • Page 7: Introduction

    1.1 Service bulletins 1.3 Working with surface-mount components Contact QSC Technical Services to make sure you have the most up-to-date service bulletins for PowerLight Series amplifiers. PowerLight amplifiers, like many modern electronic products, use Service bulletins may be distributed in hard copy, via fax, and...

  • Page 8: Multi-Pin Components (Ics, Etc.)

    This service manual covers the three most powerful models Insertion developed for the PowerLight Series: the PowerLight 6.0 II, the 1. With a soldering iron and 60/40 or 63/37 eutectic-type solder, PowerLight 6.0 , and the PowerLight 9.0 .

  • Page 9: Technical Descriptions And Theory Of Operation

    Power supplies the audio signal from driving the output section itself into QSC PowerLight amplifiers feature high-frequency switch-mode actual clipping. This maintains power supplies that help reduce noise, increase electrical damping on the channel output efficiency, and lower weight. Two models, the PowerLight 9.0 Figure 1.9.

  • Page 10: Servicing The Amplifier

    • Needle-nose pliers the line filter assembly and the input, output, and display board • Adhesive rubber foot (one per channel), QSC part # QQ- assemblies. QQQQQQ-QQ or equivalent Within the chassis, the power supply modules are on the bottom, •...
  • Page 11 12. There may be an adhesive rubber foot wedged in front of each module circuit board. Grasp it with the needle-nose pliers and pull it out. Removing the chassis rear panel 13. Remove the four screws on the rear panel (see Figure 2.4).
  • Page 12 28. Remove the side-facing screw from the front of the partition traces, especially around the switching MOSFETs; missing or on channel 1’s side. damaged ones can be repaired using a trace repair kit. If the QSC Audio Products, Inc. TD-000083-00...

  • Page 13: Reassembly

    Key QSC Part Description Qty. CH-000078-00 Chassis, PL 9.0 PL-000107-00 Heatsink insulator CH-000080-00 Chassis horiz. partition SC-080051-PS Screw, #8-32 × 5/16”, SEMS SC-082051-PU Screw, #8-32 × 5/16”, pan head SC-060042-PP Screw, #6-32 × 1/4”, SEMS PL-000109-00 Insulator, mega platform PL-000137-00 Insulator, amp rear bottom Figure 2.5.
  • Page 14 1, 2, 3, and 4. 19. Reconnect the power supply control interface. Make sure the latching wings of the board-mounted connector are up all the way. QSC Audio Products, Inc. TD-000083-00...

  • Page 15: The Display Board

    Key QSC Part Description Qty. CH-000078-00 Chassis, PL 9.0 HW-000079-00 Hex standoff #6-32 x 9/16” WP-000176-00 Display PCB assy. SC-060042-PP Screw, #6-32 × 1/4”, SEMS HW-060080-HW Hex standoff #6-32 x 1/2” PL-000054-00 Knob fab. Figure 5.7. Removing or installing the display board.
  • Page 16 Line filter PCB assy. (230V) C0-000099-00 Connector line side flange SC-083061-PU Screw, #8-18 × 3/8”, flat head SW-000027-SW Switch AC WC-000022-00 Cord set 3 cond. 16A 250 VAC Figure 2.8. Assembly details of the AC line filter. QSC Audio Products, Inc. TD-000083-00...

  • Page 17: Power Supply Servicing

    REMOTE CONTROLLER is blown, you will also need a 1A 250V 5×20 mm slow-blow fuse (QSC part # MS-000113-00) to replace it with. Also, the alumina insulator between the diodes and the heat sink is very fragile and often breaks when the diodes are removed; replace it with QSC part # PL-000085-00.
  • Page 18 Remove the MOSFETs from the heat sink. Thoroughly clean the old thermal grease off the heat sink. Apply fresh thermal grease to the new MOSFETs (QSC part # QD-000188-00) and attach them to the heat sink. Make sure the new MOSFETs are correctly oriented. One end of each MOSFET has a mounting hole, while the other has an open-ended slot (see Figure 2.9).

  • Page 19: Suggestions For Troubleshooting

    AC power switch. Each channel has two fast-blow ceramic AC fuses, for a total of four (120V models: 125V 25A, QSC part # MS-000112-00; 230V models: 250V 15A, QSC part # MS-150250-FU). Check them and replace any that are blown.

  • Page 20: Adjusting And Calibrating The Power Supply Module

    The fixture is custom built by QSC. procedures, it can only be performed at the QSC factory by trained personnel. Follow these procedures exactly and in order. Front panel switches and indicators There are four trimpots, VR1–VR4 (see Figure 2.14), on the...
  • Page 21 • Upper barrier strip. Connect the DC rail wires to the upper barrier Transformer flux sample Connect to external DC Power switch for DC high rail outputs: 191.3 V for balancing procedure. supply. Watch polarity: housekeeping PL 9.0 ; 166.5 V for PL 6.0 strip for the other procedures.
  • Page 22 Adjust VR4 to obtain the a reading of 191.3 volts DC (for the PL 9.0) or 166.5 volts DC (for the PL 9.0) on DMM #1. QSC Audio Products, Inc. TD-000083-00...
  • Page 23 Procedure 3 of 5: Adjusting transformer balance Set the Variac to 130 volts (for 120V modules) or 260 volts (for 230V modules). This is done in three stages. In the first two, watch the trans- Run the AP test file (Pfcpwr2k.tst) for a 2-ohm power sweep former flux “bubble”...

  • Page 24: Ac Voltage Conversions

    120 volts to any other voltage be done only by QSC’s factory service. Any other operating voltage conversions may be done only by a QSC-authorized service center or international distributor. The power supply modules and line filter modules in the PowerLight 6.0 II, PowerLight 6.0...

  • Page 25: Troubleshooting

    3. Troubleshooting Because of the high complexity of the circuitry used in the If all is well, you can safely increase the AC voltage to the amplifiers covered by this manual, most, if not all, of your amplifier’s normal operating level and test its audio perfor- troubleshooting efforts will be at board level.

  • Page 26: Further Troubleshooting

    The LED on the remote controller should glow green. 12. Increase the AC voltage to 65 volts (120-volt model) or 130 volts (230-volt model). 13. Measure the voltages on the supply wires 1 through 4, using wire 0 as a reference. QSC Audio Products, Inc. TD-000083-00...

  • Page 27: Parts

    4. Parts 4.1 Semiconductor package descriptions and pinouts Legend: A = anode; B = base; C = collector; D = drain; G = gate; K = cathode; S = source IC-000024-00 IC-000047-30 Controller, PWM, SG3525AN; 16-pin DIP Comparator, dual, LM393; 8-pin SMT INV.
  • Page 28 OUT 4 INV. 1 INV. 4 IC-000056-30 NON-INV. 1 NON-INV. 4 Driver, MOSFET, TC4427; 8-pin SMT NON-INV. 2 NON-INV. 3 IN A OUT A INV. 2 INV. 3 IN B OUT B OUT 2 OUT 3 QSC Audio Products, Inc. TD-000083-00...
  • Page 29 IC-000064-00 IC-000072-OP Driver, MOSFET, 4452BN; 8-pin DIP Op amp, dual, TL072; 8-pin DIP OUTPUT A INVERTING OUTPUT B INPUT A NON-INVERTING INVERTING INPUT A INPUT B NON-INVERTING INPUT B IC-000073-30 Transconductance op amp, DUAL, LM13600M; 16-pin SMT IC-000067-30 Differential amplifier, dual, CA3054; 14-pin SMT AMP BIAS INPUT A AMP BIAS INPUT B DIODE BIAS A...
  • Page 30 Driver, MOSFET, IR2110; 14-pin DIP Diode Zener, 6.2V, , 0.25W, DZ901116G, DO-35 PD-000036-30 Power supply signal management, GAL16V8, PL9.0 and PL6.0 This device must be programmed by QSC before installation. QD-000042-00 I/CLK I/O/Q Diode rectifier ultrafast, 400V, 3A, MUR440, DO-201AD, 50 ns...
  • Page 31 QD-000062-10 QD-000102-30 Transistor NPN 40V, 0.2A, 1.5W, 2N3904, TO-92 Diode, 75V, 0.075A, IMBD4148, SOT-23, 4 ns QD-000063-10 QD-000108-30 Transistor PNP 40V, 0.2A, 1.5W, 2N3906, TO-92 Diode, 200V, 0.2A, BAS21, SOT-23, 50 ns QD-000065-10 QD-000137-30 Transistor PNP, 300V, 0.5A, 1.5W, MPSA92, TO-92 Diode Schottky, 15V, 0.01A, , MMBD301LT1, SOT-23, VF MAX 0.6V QD-000123-10 QD-000168-30...
  • Page 32 QD-000117-00 Diode rectifier fast, 600V, 60A, , DSEI60-06A, TO-247AD, 35NS QD-000160-00 Diode rectifier ultrafast, 200V, 60A, APT60D20B, TO-247AD, 85 ns QD-000129-00 K (back of case) Transistor PNP, 100V, 5A, 28W, MJF127, TO-220 B C E QSC Audio Products, Inc. TD-000083-00...
  • Page 33 QD-000131-00 QD-000170-00 MOSFET N-channel, 70V, 110A, 500W, IXFK110N07, TO-264 Bridge rectifier, 600V, 50A, in-line QD-000132-00 MOSFET N-channel, 200V, 74A, 416W, IXTK74N20, TO-264 D (back of case) +OUT AC IN AC IN -OUT QD-000176-00 MOSFET N-channel, 55V, 81A, 170W, IRFP054N, TO-264 D (back of case) QD-000157-10 Diode, 1000V, 1.5A, 1N5399, DO-15...
  • Page 34 IGBT, 600V, 32A, 140W, IXGR32N60C, TO-247 QD-000188-00 MOSFET N-CHANNEL, 500V, 55A, 600W, IXFN55N50, SOT-227B QD-001340-LR LED red, T-1 3/4, voltage reference QD-000229-10 Diode, 250V, 0.25A, , BAV21, DO-35, 50NS QD-004148-DX Diode, 75V, 0.075A, 1N4148, DO-35, 4ns QSC Audio Products, Inc. TD-000083-00...

  • Page 35: Parts Lists

    WP-000042-00 WP-000022-00 WP-000042-00 WP-000135-00 WP-000042-00 WP-000135-00 For individual replacement parts, the lists on this and the following pages are organized by module or major assembly. Chassis Assembly (QSC part #WP-000268-00) Where used: PowerLight 6.0 II, 120 volts QSC Part #...

  • Page 36: Chassis Assembly (Qsc Part # Wp-000268-02)

    PCB ASSY, POWER SUPPLY, EVICTOR, 120V, WP-000271-00 CHASSIS ASSY, REAR, PL6.0II, , WP-000276-00 PCB ASSY, , PL 6.0 (NEW), , Chassis Assembly (QSC part # WP-000268-02) Where used: PowerLight 6.0 II, 230 volts QSC Part # Description Qty Comments CH-000078-00 CHASSIS, MAIN, , PL9.0,...

  • Page 37: Chassis Assembly (Qsc Part # Wp-000260-00)

    WP-000266-02 PCB ASSY, POWER SUPPLY, EVICTOR, 230V, WP-000271-00 CHASSIS ASSY, REAR, PL6.0II, , WP-000276-00 PCB ASSY, , PL 6.0 (NEW), , Chassis Assembly (QSC part # WP-000260-00) Where used: PowerLight 6.0 , 120 volts QSC Part # Description Comments CH-000078-00 CHASSIS, MAIN, , PL9.0,...

  • Page 38: Chassis Assembly (Qsc Part # Wp-000260-02)

    WP-000262-00 PCB ASSY, POWER SUPPLY, PL6.0, 120V, WP-000264-00 CHASSIS ASSY, REAR, PL6.0, , WP-000276-00 PCB ASSY, , PL 6.0 (NEW), , Chassis Assembly (QSC part # WP-000260-02) Where used: PowerLight 6.0 , 230 volts QSC Part # Description Qty Comments CH-000078-00 CHASSIS, MAIN, , PL9.0,...

  • Page 39: Chassis Assembly (Qsc Part # Wp-000170-00)

    WP-000262-02 PCB ASSY, POWER SUPPLY, PL6.0, 230V, WP-000264-00 CHASSIS ASSY, REAR, PL6.0, , WP-000276-00 PCB ASSY, , PL 6.0 (NEW), , Chassis Assembly (QSC part # WP-000170-00) Where used: PowerLight 9.0 , 120 volts QSC Part # Description Qty Comments CH-000078-00 CHASSIS, MAIN, , PL9.0,...

  • Page 40: Chassis Assembly (Qsc Part # Wp-000170-02)

    WP-000176-00 PCB ASSY, DISPLAY, PL9.0, , WP-000177-00 PCB ASSY, LINE FILTER, PL9.0, 120V, WP-000182-00 PCB ASSY, , PL 9.0 (NEW), , Chassis Assembly (QSC part # WP-000170-02) Where used: PowerLight 9.0 , 230 volts QSC Part # Description Qty Comments CH-000078-00 CHASSIS, MAIN, , PL9.0,...

  • Page 41: Chassis Assembly, Rear (Qsc Part # Wp-000271-00)

    PCB ASSY, LINE FILTER, PL9.0, 230V, WP-000182-00 PCB ASSY, , PL 9.0 (NEW), , Chassis Assembly, Rear (QSC part # WP-000271-00) Where used: PowerLight 6.0 II, 120 and 230 volts This is a subassembly of Chassis Assembly WP-000268-00 or WP-000268-02; one per amplifier.

  • Page 42: Chassis Assembly, Rear (Qsc Part # Wp-000172-00)

    Chassis Assembly, Rear (QSC Part # WP-000172-00) Where used: PL9.0 , 120 and 230 volts. This is a subassembly of Chassis Assembly WP-000170-00 or WP-000170-02; one per amplifier. QSC Part # Description Qty Comments CO-000146-00 BINDING POST, SINGLE, 1 POS, FEMALE, 60A BLACK...

  • Page 43: Input Pcb Assembly (Qsc Part # Wp-000265-00)

    Input PCB Assembly (QSC part # WP-000265-00) Where used: PowerLight 6.0 , 120 and 230 volts. This is a subassembly of the Chassis Assembly, Rear (WP-000264-00); one per amplifier. QSC Part # Description Qty Comments Reference CA-122001-10 220PF, 10 PCNT, 100V, CERAMIC NPO, DISC,...

  • Page 44: Input Daughterboard Assembly (Qsc Part # Wp-000178-00)

    DIODE, 75V, 0.075A, , 1N4148, DO-35, 4NS SC-040041-PP PHILLIPS, PANHEAD, #4-40, 0.25" L, BLACK, Audio Channel Module Assembly (QSC part number WP-000276-00) Where used: PowerLight 6.0 II and PowerLight 6.0 , both 120 and 230 volts. This is a subassembly of the chassis assembly; two per amplifier.
  • Page 45 Audio Channel Module Assembly WP-000276-00 (continued) QSC Part # Description Qty Comments Ref erence CH-000091-00 CLAMP, TO-264, 5.1", PL9.0, CH-000091-01 CLAMP, TO-264, 4.5", PL9.0, CH-000074-00 HEAT SINK, AUDIO, 8", PL9.0, CH-000075-00 HEAT SINK, AUDIO, 14", PL9.0, CO-000074-00 HEADER, 0.1" CENTERS, 8 POS (1X8), MALE, RAMP LOCK CO-000033-CO HEADER, 0.1"...
  • Page 46 309, 1 PCNT, 1/10W, THICK FILM, 0805, 100V R31, R38, R127, R135, R124, R125, R130, R133, R155, R141, R162, R167, R168, R169, R180, R181 RE-033203-30 332, 1 PCNT, 1/4W, THICK FILM, 1210, 200V R206, R347, R358, R365 QSC Audio Products, Inc. TD-000083-00...
  • Page 47 Audio Channel Module Assembly WP-000276-00 (continued) QSC Part # Description Qty Comments Ref erence RE-047502-30 475, 1 PCNT, 1/10W, THICK FILM, 0805, 100V R4, R21, R107, R118, R123, R129, R132, R145, R147, R153, R159, R171, R174, R177, R196, R410 RE-047506-30...

  • Page 48: Audio Channel Module Assembly (Qsc Part # Wp-000182-00)

    NO POLARITY XF-000068-00 INDUCTOR, ZOBEL, , 1UH, , , Audio Channel Module Assembly (QSC part # WP-000182-00) Where used: PL 9.0 , 120 and 230 volts. This is a subassembly of the Chassis Assembly, WP-000170-00 or WP-000170-02; two per amplifier.
  • Page 49 Audio Channel Module Assembly WP-000182-00 (continued) QSC Part # Description Qty Comments Ref erence CA-647003-10 47UF, 10 PCNT, 10V, ELECTROLYTIC, , NON-POLAR LOW PROFILE C28, C88, C89, C98, C108, C114, C121, C127, C131, C742 CA-710001-10 100UF, 20 PCNT, 35V, ELECTROLYTIC, ,...
  • Page 50 R725, R726 RE-015006-30 150, 1 PCNT, 1/8W, THICK FILM, 1206, 200V R144 RE-020002-30 200, 1 PCNT, 1/10W, THICK FILM, 0805, 100V R30, R150, R189, R191, R240, R244, R250, R252, R302, R326, R348, R352, R742, R746 QSC Audio Products, Inc. TD-000083-00...
  • Page 51 Audio Channel Module Assembly WP-000182-00 (continued) QSC Part # Description Qty Comments Ref erence RE-022100-30 221, 1 PCNT, 1/10W, THICK FILM, 0805, 100V R22, R92, R136, R148, R152, R173, R176, R178 RE-030900-30 309, 1 PCNT, 1/10W, THICK FILM, 0805, 100V...

  • Page 52: Power Supply Assembly (Qsc Part # Wp-000266-00)

    INDUCTOR, COMMON MODE, , 120UH, , , NO POLARITY XF-000068-00 INDUCTOR, ZOBEL, , 1UH, , , Power Supply Assembly (QSC part # WP-000266-00) Where used: PowerLight 6.0 II, 120 volts This is a subassembly of the Chassis Assembly, WP-000268-00; two per amplifier. QSC Part #...
  • Page 53 Power Supply Assembly WP-000266-00 (continued) QSC Part # Description Qty Comments Ref erence CA-822200-AE 2200UF, 20 PCNT, 200V, ELECTROLYTIC, , C132, C133, C136, C137, C140, C141 CH-000103-00 CLAMP, TO-3PL, 22 GA, PLX3002, CH-000262-00 HEAT SINK, PFC, 11", EVICTOR, CH-000263-00 HEAT SINK, MAIN SUPPLY, 13.5", EVICTOR, CO-000074-00 HEADER, 0.1"...

  • Page 54: Power Supply Assembly (Qsc Part # Wp-000266-02)

    INDUCTOR, COMMON MODE, TOROID, 81UH, EVICTOR, , XF-000208-00 INDUCTOR, SERIES RESONANT, TOROID, 1.0UH, , , Power Supply Assembly (QSC part # WP-000266-02) Where used: PowerLight 6.0 II, 230 volts. This is a subassembly of the Chassis Assembly, WP-000268-02; two per amplifier.
  • Page 55 Power Supply Assembly WP-000266-02 (continued) QSC Part # Description Qty Comments Ref erence CA-347002-30 0.047UF, 20 PCNT, 50V, CERAMIC Z5U, 0805, C3, C4, C11–C13, C15, C28, C64, C81 CA-410011-00 0.1UF, 10 PCNT, 400V, FILM, DIPPED, C14, C107, C123 CA-410012-30 0.1UF, 10 PCNT, 25V, CERAMIC X7R, 0805,...
  • Page 56 BEAD, 100MHZ, 271 OHM, L7–L13 XF-000194-00 TRANSFORMER, SWITCHING, , , , NEW PL6.0, , XF-000204-00 HOUSEKEEPING, FLYBACK, , , , EVICTOR, , XF-000206-00 INDUCTOR, COMMON MODE, TOROID, 81UH, EVICTOR, , XF-000208-00 INDUCTOR, SERIES RESONANT, TOROID, 1.0UH, , , QSC Audio Products, Inc. TD-000083-00...

  • Page 57: Power Supply Assembly (Qsc Part # Wp-000262-00)

    Power Supply Assembly (QSC part # WP-000262-00) Where used: PowerLight 6.0 , 120 volts This is a subassembly of the Chassis Assembly, WP-000260-00; two per amplifier. Part Number Description Qty Comments Ref Des CA-147100-BD 470PF, 10 PCNT, 100V, CERAMIC Y5F, DISC, C1–C4...

  • Page 58: Power Supply Assembly (Qsc Part # Wp-000262-02)

    INDUCTOR, CURRENT SENSE, TOROID, 100TURN, PL9.0, , CUT AND REMOVE GRAY WIRES T2, T3 Power Supply Assembly (QSC part # WP-000262-02) Where used: PowerLight 6.0 , 230 volts This is a subassembly of the Chassis Assembly, WP-000260-02; two per amplifier.
  • Page 59 Power Supply Assembly WP-000262-02 (continued) QSC Part # Description Qty Comments Ref erence HW-080006-SO SPACER, 0.312" ROUND, #8, 0.470" L, ALUMINUM, SWAGE APPLY THE SWAGE TOOL, INSTALL ON TOP SIDE HW-080080-PS STUD, PEM STYLE, #8-32, 0.500" L, TIN PLATED BRONZE,...

  • Page 60: Power Supply Controller Assembly (Qsc Part # Wp-000263-00)

    T2, T3 XF-000095-00 TRANSFORMER, SWITCHING, 100KHZ, , 3000W, PL6.0, , Power Supply Controller Assembly (QSC part # WP-000263-00) Where used: PowerLight 6.0 , 120 and 230 volts This is a subassembly of the Power Supply Assembly, WP-000262-00 or WP-000262-02; two per amplifier.
  • Page 61 Power Supply Controller Assembly WP-000263-00 (continued) QSC Part # Description Qty Comments Ref erence QD-000102-30 DIODE, 75V, 0.075A, , IMBD4148, SOT-23, 4NS D1, D6, D11, D13, D15 QD-000103-30 TRANSISTOR NPN, 40V, 0.2A, 0.2W, MMST3904, SOT-23, Q3–Q5, Q7–Q10 QD-000104-30 TRANSISTOR PNP, 40V, 0.2A, 0.2W, MMST3906, SOT-23,...

  • Page 62: Power Supply Assembly (Qsc Part # Wp-000173-00)

    Power Supply Assembly (QSC part # WP-000173-00) Where used: PowerLight 9.0 , 120 volts. This is a subassembly of the Chassis Assembly, WP-000170-00; two per amplifier. QSC Part # Description Qty Comments Reference CA-147100-BD 470PF, 10 PCNT, 100V, CERAMIC Y5F, DISC, C1–C4...

  • Page 63: Power Supply Assembly (Qsc Part # Wp-000180-00)

    INDUCTOR, CURRENT SENSE, TOROID, 100TURN, PL9.0, , CUT AND REMOVE GRAY WIRES T2, T3 Power Supply Assembly (QSC part # WP-000180-00) Where used: PowerLight 9.0 , 230 volts. This is a subassembly of the Chassis Assembly, WP-000170-02; two per amplifier.
  • Page 64 E5-9(0-E9,1-E8,2-E7,3-E6,4-E5) FOLK TERMINAL FACE-UP WC-000127-00 JUMPER, PVC INSULATION, 14 AWG SOLID, 1 CONDUCTOR, , 1.75" L, WC-000130-00 CABLE ASSY, POWER SUPPLY/AMP, 24 AWG, 8 CONDUCTOR, PL9.0, 9.5" L, FROM CONTROL PCB J100 TO AMP PCB QSC Audio Products, Inc. TD-000083-00...

  • Page 65: Power Supply Controller Assembly (Qsc Part # Wp-000174-00)

    INDUCTOR, CURRENT SENSE, TOROID, 100TURN, PL9.0, , CUT AND REMOVE GRAY WIRES T2, T3 Power Supply Controller Assembly (QSC part # WP-000174-00) Where used: PowerLight 9.0 , 120 and 230 volts. This is a subassembly of the Power Supply Assembly, WP-000173-00 or WP-000180-00; two per amplifier.

  • Page 66: Display Pcb Assembly (Qsc Part Number Wp-000176-00)

    750K, 1 PCNT, 1/10W, THICK FILM, 0805, 100V XF-000037-00 TRANSFORMER, HOUSEKEEPING, , , , PL9.0, , POWER SUPPLY Display PCB Assembly (QSC part number WP-000176-00) Where used: All models, all voltages This is a subassembly of each model’s respective chassis assembly; one per amplifier.
  • Page 67 Display PCB Assembly WP-000176-00 (continued) QSC Part # Description Qty Comments Ref erence PT-310000-CR GAIN, 10K, 20 PCNT, 0.2W, 11 DETENT, R509, R609 QD-000052-00 LED GREEN, , , , , T-1, DIFFUSED LD503, LD603, LD507, LD607 QD-000053-00 LED YELLOW, , , , , T-1,...

  • Page 68: Line Filter Assembly (Qsc Part Number Wp-000177-00)

    Line Filter Assembly (QSC part number WP-000177-00) Where used: All models, 120 volts This is a subassembly of the chassis assembly; one per amplifier. QSC Part # Description Qty Comments Ref erence CA-222001-00 0.0022UF, 20 PCNT, 125VAC, CERAMIC Y5U, DISC, YCAP...

  • Page 69: Matched Fets

    , PL 9.0 Please note that these FETs should always be replaced as a matched group. After any FET replacement, the power supply module must be recalibrated and aligned as instructed in this manual. QSC Part Number: WP-000056-00 Part Number Description...

  • Page 70: Schematic Diagrams

    5. Schematic diagrams QSC Audio Products, Inc. TD-000083-00...
  • Page 71 PowerLight 6.0 PowerLight 6.0 II PowerLight 9.0 Input Daughterboard 220p Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 72 PowerLight 6.0 PowerLight 6.0 II Input Board TL072 220p U300:1 C300 TL072 220p U300:2 C302 TL072 U400:2 220p C400 TL072 U400:1 220p C402 SW1:4 SW1:1 SW1:3 SW1:2 QSC Audio Products, Inc. TD-000083-00...
  • Page 73 PowerLight 9.0 Input Board TL072 220p U300:1 C300 TL072 220p U300:2 C302 TL072 U400:2 220p C400 TL072 U400:1 220p C402 SW1:4 SW1:1 SW1:3 SW1:2 = Signal path = Signal path (opp. polarity) Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 74 Node N289 PROTECT J6:11 “Ana gnd” 15 V V_MON V_MON pp. 5A7 & 7D4 LOSS_OF_FEEDBACK CLIP J6:12 PROTECT Node N289 J6:13 PWR_GND “Ana gnd” pp. 5A7 & 7D4 J6:14 CLIP_FEED CLIP_FEED J6:15 CLIP CLIP J6:16 PWR_GND QSC Audio Products, Inc. TD-000083-00...
  • Page 75 SHED_V SHED_V PWR_GND +15V PSENABLE_A PSENABLE_A STANDBY STANDBY I_SET I_SET MSP_VMON MSP_VMON MSP_VMON PWR_GND D_GND PSENABLE_K PSENABLE_K MSP_IMON MSP_IMON MSP_IMON 280 KHz LPF MODE_FLAG PowerLight 9.0 CLIP_ Routing -POL- SIG_GND SIG_GND +POL+ CH_IN_N CH_IN_N +POL+ 47-10NP-10% +POL+ J6:1 CH_IN_P CH_IN_P POT_TOP -POL- J6:2...
  • Page 76 A_POST_POT_N +POL+ U501:2 J501:4 A_POST_POT_P TL072 J501:5 SIG_GND J501:6 A_STANDBY_LED TL072 J501:7 SIG_GND U501:1 J501:8 A_VP J501:9 A_VN J501:10 A_+15V J501:11 A_V_MON J501:12 A_PROTECT J501:13 PWR_GND J501:14 A_CLIP_FEED J501:15 A_CLIP J501:16 PWR_GND = Signal path QSC Audio Products, Inc. TD-000083-00...
  • Page 77 PowerLight 6.0 PowerLight 6.0 II PowerLight 9.0 Display board, Channel B J601:1 +POL+ B_POT_TOP J601:2 B_REREF J601:3 -POL- B_POST_POT_N +POL+ U601:2 J601:4 B_POST_POT_P TL072 J601:5 SIG_GND J601:6 B_STANDBY_LED TL072 J601:7 SIG_GND U601:1 J601:8 B_VP J601:9 B_VN J601:10 B_+15V J601:11 B_V_MON J601:12 B_PROTECT J601:13...
  • Page 78 Limiter is shown in "fast clip-tracking"mode. PowerLight 6.0 II To convert to a slow attack/release limiter, open the 3 places shown shorted with lines, and make the connection shown by the Signal Processing arrow line. GAIN_RETARD QSC Audio Products, Inc. TD-000083-00...
  • Page 79 I_MON DIFF_AMP_BIAS Gain = 1/37.5 650mV pk excursion _V200 P_ISENSE _BOP MUTE N_ISENSE 5V=187V -POL- _N_STEP _SPK_GND Positive = Clip _BOP -POL- Values shown preclip a fixed +POL+ 5 volts below the rails up to 15 amps of output current. After that, preclip advances 120 mV per ampere output, for 12v preclip at 70 amps.
  • Page 80 TL072 or EQIV!!! CLAMP_SIG V_MON _V100 _V100 LOSS_OF_FEEDBACK _N_STEP PROTECT _V50 _V50 _N_STEP B4_P SHED_V 3 volts here signifies _VTOP 50 amps output, so 27 V load is likely 2 ohms. B4_N _VBOT I_MON 22u-25V _N_STEP QSC Audio Products, Inc. TD-000083-00...
  • Page 81 Clamps caps to 48-54V _V200 _V150 PowerLight 9.0 Class H Step Drivers _V150 _N_STEP NOTE: This opamp must not clamp its input terminals together. TL072 or EQIV!!! CLAMP_SIG V_MON _V100 _V100 LOSS_OF_FEEDBACK _N_STEP PROTECT _V50 _V50 _N_STEP B4_P SHED_V 3 volts here signifies _VTOP 50 amps output, so 27 V...
  • Page 82 12.4 V _BOP _BGND U21:1 U21:2 CA3054M96 CA3054M96 U21:3 CA3054M96 PowerLight 6.0 DN_DRV UP_DRV _VBOT PowerLight 6.0 II Node N182 C126 Puppetmaster (Class B “B3_P” (through 150 resistor) 22u-25V p. 1C1 Current Steering) 40 V B3_N QSC Audio Products, Inc. TD-000083-00...
  • Page 83 PM_REF 12.4 V _BOP _BGND U21:1 U21:2 CA3054M96 CA3054M96 U21:3 CA3054M96 DN_DRV UP_DRV _VBOT PowerLight 9.0 Node N182 C126 Puppetmaster (Class B “B3_P” (through 150 resistor) 22u-25V p. 1C1 Current Steering) 40 V B3_N Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 84 EL2257C EL2257C U14:1 U14:2 U13:2 U13:1 40 V Node N105 U14:3 U13:3 “B3_N” EL2257C EL2257C pp. 2A7 & 7B5 _VBOT PM_REF ITEM NO. PART NO. DESCRIPTION VENDOR PowerLight 6.0 PowerLight 6.0 II Output Power Section QSC Audio Products, Inc. TD-000083-00...
  • Page 85 _VTOP EL2257C EL2257C EL2257C EL2257C U12:1 U12:2 U11:1 U11:2 B2_P B1_P U12:3 U11:3 EL2257C EL2257C 20 V 30 V B2_N B1_N This connects to chassis gnd at the rear panel. _SPK _BOP _BGND _SPK_GND B3_P B3_P EL2257C EL2257C EL2257C EL2257C U14:1 U14:2 U13:2...
  • Page 86 11 V @ 80 deg C. I_MON 11 V MSP_IMON Node N273 The "HOT" threshold is 80°C 15 V 2.5V-1% Cutback begins at 100°C and “+15V_” full shutdown happens at 110°C. (±3 degrees) p. 4B7 QSC Audio Products, Inc. TD-000083-00...
  • Page 87 Current gain: 22,460. 3.6 mA total set curent results in 81A peak output. Minumum at full cut-back is 250 uA or 5.6A output. PROTECT DIFF_AMP_BIAS SMPS_ON MUTE STANDBY_LED PowerLight 9.0 PSENABLE_A I_SET _BOP Management/Protection PSENABLE_K Nominal I_SET = 3ma to 5ma. Amp is fully on at I_SET>1ma.
  • Page 88 PowerLight 6.0 PowerLight 6.0 II PowerLight 9.0 Line Filter, 120 volts QSC Audio Products, Inc. TD-000083-00...
  • Page 89 PowerLight 6.0 PowerLight 6.0 II PowerLight 9.0 Line Filter, 230 volts Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 90 PowerLight 6.0 PowerLight 6.0 II PowerLight 9.0 Output Board QSC Audio Products, Inc. TD-000083-00...
  • Page 91 B1_P +15V 22u-25V B1_N B2_P B2_N PowerLight 6.0 PowerLight 6.0 II Housekeeping Supply B3_P (Audio Module) B3_N B4_P B4_N DRAIN SOURCE CONTROL Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 92 11 V 30 V 11 V B1_N B2_P 20 V B2_N PowerLight 9.0 Node N182 Housekeeping Supply “B3_P” (through 150 resistor) B3_P p. 1C1 (Audio Module) 40 V B3_N B4_P 27 V B4_N DRAIN SOURCE CONTROL QSC Audio Products, Inc. TD-000083-00...
  • Page 93 PowerLight 6.0 Power Supply Controller Board Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 94 PowerLight 6.0 Power Supply QSC Audio Products, Inc. TD-000083-00...
  • Page 95 PowerLight 9.0 Power Supply Controller Board Technical Service Manual PowerLight 6.0 II, PowerLight 6.0 , and PowerLight 9.0...
  • Page 96 PowerLight 9.0 Power Supply QSC Audio Products, Inc. TD-000083-00...
  • Page 97 V+17.2 V+17.2 PRI_HI V+17.2 PRI_LO V+17.2 OUTB SYNC PRICAPCT SWITCHEDHV PRI_LO OUTA SOFTSTART PRI_LO RELAY/AMP_DRIVE NEUTRAL PRI_LO V+17.2 PRI_LO PRI_LO PRI_LO PRI_LO SWITCH_INHIBIT_DRIVE PRI_LO PRI_LO PRI_LO PowerLight 6.0 II PRI_LO PRI_LO PRI_LO Power Supply V+17.2 PRI_LO XFM_NTC+ PFC_NTC+ COR_NTC+ 200V 150V PRI_LO PRI_LO...
  • Page 98 Hard Limit at 395V-400V RELAY/AMP_DRIVE Scale Factor 1V = 150V 375v to 385V cut board out, Reg Range under body 2.5v (Unused) PRICAPCT PRI_LO PRI_LO PRI_LO PUMP_NEG PRI_LO V+17.2 Stop Threshold PRI_LO PRI_LO PRI_LO PRI_LO QSC Audio Products, Inc. TD-000083-00...
  • Page 100 “QSC” and the QSC logo are registered trademarks of QSC Audio Products, Inc. 1675 MacArthur Blvd. Costa Mesa, CA 92626 USA PHONE: +1 (714) 957-7150 TOLL-FREE IN USA: 1-800 772-2834 FAX: +1 (714) 754-6173 www.qscaudio.com...

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