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QSC PowerLight Series Technical & Service Manual

Summary of PowerLight Series

  • Page 1

    Powerlight™ series two-channel power amplifiers technical service manual *td-000083-00* td-000083-00 rev. Prelim. ▲ ▲ ▲ ▲ ▲ powerlight 6.0 ii ▲ ▲ ▲ ▲ ▲ powerlight 6.0 pfc ▲ ▲ ▲ ▲ ▲ powerlight 9.0 pfc on off p r o t e c t s ta n d b y p o w e r 1 c h a n n e l 2 9 0 0 0 w at t p o w e r f a c t o r c...

  • Page 3: Powerlight Series

    Technical service manual 1 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc qsc audio products, inc. Technical services group phone: 1-800 qsc audio (1-800-772-2834) usa only +1 (714) 957-7150 fax: +1 (714) 754-6173 postal: 1665 macarthur blvd. Costa mesa, california 92626 usa e-mail: ...

  • Page 4: Powerlight 9.0

    2 qsc audio products, inc. Td-000083-00 powerlight 9.0 pfc powerlight 6.0 pfc powerlight 9.0 ii.

  • Page 5: Table of Contents

    Technical service manual 3 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc table of contents performance specifications ........................................................................................................................................................................

  • Page 6: Performance Specifications

    4 qsc audio products, inc. Td-000083-00 powerlight 6.0 ii powerlight 6.0 pfc powerlight 9.0 pfc output power in watts ftc: 20 hz–20 khz, both channels driven 8 Ω per channel 1150 ( 1400 ( 1800 ( 4 Ω per channel 2050 ( 2500 ( 3200 ( 2 Ω per channel 3250 ( 3250 ( eia: 1 khz @ 1% thd, both channels dri...

  • Page 7: 1. Introduction

    Technical service manual 5 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc solder braid 1. Introduction 1.3 working with surface-mount components powerlight amplifiers, like many modern electronic products, use surface-mount technology (smt) components where appropriate in order to ma...

  • Page 8: 1.4 Series Description

    6 qsc audio products, inc. Td-000083-00 solder solder tweezers solder let the solder harden to tack the component in place. 4. Fully solder the other end of the component to its pad. Let the solder harden (figure 1.5). 5. Fully solder the tacked end of the component to its pad (figure 1.6). Three-te...

  • Page 9: Theory of Operation

    Technical service manual 7 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 1.5 technical descriptions and theory of operation power supplies qsc powerlight amplifiers feature high-frequency switch-mode power supplies that help reduce noise, increase electrical efficiency, and lower we...

  • Page 10: 2. Servicing The Amplifier

    8 qsc audio products, inc. Td-000083-00 2. Servicing the amplifier 2.1 mechanical disassembly and reassembly key qsc part description qty. 1 2 3 4 5 wp-000170-xx chassis assy., pl 9.0 1 ch-000079-00 top cover 1 sc-082051-pl screw, #8-32 × 5/16”, pan head 6 sc-080051-pu screw, #8-32 × 5/16”, flat hea...

  • Page 11

    Technical service manual 9 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc fan (4-pin header; 2 pins per fan) power supply (wires 0 through 4) housekeeping supply display board (via multi- conductor ribbon cable) from input board (detachable latching header) (2 bundles) preparing the ...

  • Page 12

    10 qsc audio products, inc. Td-000083-00 key qsc part description qty. 1 2 3 4 5 ch-000078-00 chassis, pl 9.0 1 wp-000172-00 rear chassis assembly 1 sc-082051-pl screw, #8 × 5/16”, pan head 4 sc-080051-pu screw, #8-32 × 5/16”, flat head 4 sc-082051-pl screw, #8 × 5/16”, pan head 2 20. Remove the cha...

  • Page 13: Reassembly

    Technical service manual 11 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc key qsc part description qty. 1 2 3 4 5 8 ch-000078-00 chassis, pl 9.0 1 pl-000107-00 heatsink insulator 2 ch-000080-00 chassis horiz. Partition 1 sc-080051-ps screw, #8-32 × 5/16”, sems 3 pl-000109-00 insulat...

  • Page 14

    12 qsc audio products, inc. Td-000083-00 key qsc part description qty. 1 2 3 4 5 ch-000078-00 chassis, pl 9.0 1 wp-000173-00 power supply pcb assy. (120v) 2 wp-000180-00 sc-040155-00 screw, #4-40 shoulder hex head 2 sc-060042-pp screw, #6-32 × 1/4”, sems 4 nw-080500-kp keps nut, #8-32 4 power supply...

  • Page 15: 2.2 The Display Board

    Technical service manual 13 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc key qsc part description qty. 1 2 3 4 5 6 ch-000078-00 chassis, pl 9.0 1 hw-000079-00 hex standoff #6-32 x 9/16” 5 wp-000176-00 display pcb assy. 1 sc-060042-pp screw, #6-32 × 1/4”, sems 2 hw-060080-hw hex sta...

  • Page 16: 120V Version

    14 qsc audio products, inc. Td-000083-00 key qsc part description qty. 1 2 3 4 wp-000177-00 line filter pcb assy. 1 nw-000021-03 flat washer 1 wp-000042-00 ac power cord assy., 30a 125v 1 sw-000027-sw switch ac 1 key qsc part description qty. 1 2 3 4 5 wp-000181-00 line filter pcb assy. (230v) 1 c0-...

  • Page 17: 2.4 Power Supply Servicing

    Technical service manual 15 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 2.4 power supply servicing bench testing power supply modules the housekeeping supplies provide electrical power to certain control circuitry in their respective audio channel modules. The control circuitry in...

  • Page 18

    16 qsc audio products, inc. Td-000083-00 (from between the diodes and the heat sink); it is extremely fragile, so it is best to replace it during reassembly with a new one. Then remove the 16 screws that attach the mosfets to the printed circuit board (pcb); if the mosfets are blown, some of the mou...

  • Page 19

    Technical service manual 17 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc this, make sure the diodes are straight and evenly spaced, and reposition them if necessary. 8. Solder the four diodes to the circuit board. 9. Reattach the gate drive cable. 10. Check the fuse (see figure 2.1...

  • Page 20

    18 qsc audio products, inc. Td-000083-00 adjusting and calibrating the power supply module adjusting and calibrating the power supply card will help ensure the success of the repair; this portion of the service bulletin describes a series of five procedures for doing so. Because of the specialized n...

  • Page 21

    Technical service manual 19 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc output to the ap workstation and to the load resistors. • transformer flux sample. Connect the tip of an oscilloscope’s ×1 probe to the exposed conductor at the tip of this attach- ment, and connect the probe’...

  • Page 22

    20 qsc audio products, inc. Td-000083-00 9. Connect dmm #1 to one set of the parallel dc v out terminals on the back of the fixture. Connect dmm #2 to the controller card, with the ground or reference lead on the tab of u8, a +12v regulator, and the hot lead on the left leg of capacitor c34. On the ...

  • Page 23

    Technical service manual 21 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc procedure 3 of 5: adjusting transformer balance this is done in three stages. In the first two, watch the trans- former flux “bubble” waveform on the oscilloscope, and on the third, adjust the ac current to a ...

  • Page 24: 2.5 Ac Voltage Conversions

    22 qsc audio products, inc. Td-000083-00 4. Turn off the fixture’s ac switch. Turn down the variac to zero. Turning off the fixture’s ac switch will automatically bleed the capacitors down. Disconnect the module from the test fixture and set the ap workstation back to sine wave and 0 volt rms. 2.5 a...

  • Page 25: 3. Troubleshooting

    Technical service manual 23 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 3. Troubleshooting because of the high complexity of the circuitry used in the amplifiers covered by this manual, most, if not all, of your troubleshooting efforts will be at board level. Proper component- lev...

  • Page 26: 3.3 Further Troubleshooting

    24 qsc audio products, inc. Td-000083-00 3.3 further troubleshooting this procedure allows you to further isolate the problem and determine which board or module is defective. Start at zero volts 1. Turn the variable transformer to zero and turn the amplifier off. Open the amplifier 2. Remove the to...

  • Page 27: 4. Parts

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 25 parts lists 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-000047-30 comparator, dual, lm393; 8-pin smt 1 2 3 4 8 7 6...

  • Page 28

    26 qsc audio products, inc. Td-000083-00 ic-000053-30 timer, dual, lm556; 14-pin smt 1 2 3 4 5 6 7 14 13 12 11 10 9 8 output reset control voltage threshold discharge trigger ground flip-flop comp. Comp. Flip-flop comp. Comp. Output reset control voltage threshold discharge v cc trigger ic-000054-30...

  • Page 29

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 27 parts lists ic-000067-30 differential amplifier, dual, ca3054; 14-pin smt 1 2 3 4 5 6 7 14 13 12 11 10 9 8 nc substrate q 1 q 2 q 3 q 4 q 5 q 6 ic-000072-op op amp, dual, tl072; 8-pin dip 1 2 3 4 8 7 6 5 a b output a inver...

  • Page 30

    28 qsc audio products, inc. Td-000083-00 ic-000134-00 driver, mosfet, ir2110; 14-pin dip 1 2 3 4 5 6 7 14 13 12 11 10 9 8 hin v dd sd lin v ss v s v b ho v cc com lo qd-000022-qd diode zener, 18v, 1w, 1n4746a, do-41 qd-000023-qd diode zener, 180v, , 1.5w, 1n5955a, do-41 qd-000047-00 diode zener, 200...

  • Page 31

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 29 parts lists qd-000062-10 transistor npn 40v, 0.2a, 1.5w, 2n3904, to-92 qd-000063-10 transistor pnp 40v, 0.2a, 1.5w, 2n3906, to-92 qd-000065-10 transistor pnp, 300v, 0.5a, 1.5w, mpsa92, to-92 qd-000123-10 transistor npn, 30...

  • Page 32

    30 qsc audio products, inc. Td-000083-00 qd-000114-30 diode zener, 150v, 600w peak, p6smb150at3, smb qd-000115-30 diode rectifier ultrafast, 600v, 1a, murs160t3, smb, 75 ns qd-000116-30 diode rectifier ultrafast, 200v, 1a, murs120, smb, 35 ns qd-000125-00 diode rectifier fast, 600v, 37a dsei30-06a, ...

  • Page 33

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 31 parts lists qd-000131-00 mosfet n-channel, 70v, 110a, 500w, ixfk110n07, to-264 qd-000132-00 mosfet n-channel, 200v, 74a, 416w, ixtk74n20, to-264 g s d d (back of case) qd-000157-10 diode, 1000v, 1.5a, 1n5399, do-15 a k qd-...

  • Page 34

    32 qsc audio products, inc. Td-000083-00 qd-000182-00 diode, 1200v, 60a, , 60eps12, to-247ad qd-000183-00 diode, 600v, 60a, 60eps08, to-247ad, pl9.0 qd-000228-00 diode, 600v, 60a, 60eps08, to-247ad, pl6.0 k a k (back of case) qd-001340-lr led red, t-1 3/4, voltage reference qd-000229-10 diode, 250v,...

  • Page 35: 4.2 Parts Lists

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 33 parts lists 4.2 parts lists because of the complexity of these amplifiers, many repairs will involve simply replacing defective modules with good ones. The table below lists the modules and major assemblies used in all thr...

  • Page 36

    34 qsc audio products, inc. Td-000083-00 pl-000107-00 insulator, power supply upper, pl9.0, fish paper, , 2 pl-000108-00 insulator, heat sink left, pl9.0, fish paper, , 2 pl-000109-00 insulator, heat sink center, pl9.0, fish paper, , 2 pl-000125-00 insulator, power supply lower rear, pl9.0, fish pap...

  • Page 37

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 35 parts lists chassis assembly wp-000268-02 (continued) qsc part # description qty comments chassis assembly (qsc part # wp-000260-00) where used: powerlight 6.0 pfc , 120 volts qsc part # description qty comments ch-000078-...

  • Page 38

    36 qsc audio products, inc. Td-000083-00 pl-000130-00 insulator, partition lower front left, pl9.0, fish paper, , 1 pl-000130-01 insulator, partition lower front right, pl9.0, fish paper, , 1 pl-000131-00 insulator, partition lower rear, pl9.0, fish paper, , 2 pl-000137-00 insulator, rear bottom, pl...

  • Page 39

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 37 parts lists pl-000137-00 insulator, rear bottom, pl9.0, fish paper, , 2 sc-040155-hc hex, cap, #4-40, 0.25" l, stainless steel, shoulder 2 sc-060042-pp sc, phillips, panhead sems internal tooth, #6-32, 0.25" l, blk, zinc, ...

  • Page 40

    38 qsc audio products, inc. Td-000083-00 sc-080051-ps phillips, panhead sems internal tooth, #8-32, 0.313" l, black, 3 sc-080051-pu phillips, flathead undercut 100 degree, #8-32, 0.313" l, black, patch 10 sc-082051-pl phillips, panhead serated base, #8, 0.313" l, black, 21 sc-100062-sc phillips, pan...

  • Page 41

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 39 parts lists sc-082051-pl phillips, panhead serated base, #8, 0.313" l, black, 21 sc-083061-pu phillips, flathead undercut, #8, 0.375" l, black waxed, type b 2 sc-100062-sc phillips, panhead, #10-32, 0.375" l, nickel, 4 sw-...

  • Page 42

    40 qsc audio products, inc. Td-000083-00 chassis assembly, rear (qsc part # wp-000172-00) where used: pl9.0 pfc , 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...

  • Page 43

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 41 parts lists input pcb assembly (qsc part # wp-000175-00) where used: powerlight 6.0 pfc , 120 and 230 volts. This is a subassembly of the chassis assembly, rear (wp-000179-00); one per amplifier. Qsc part # description qty...

  • Page 44

    42 qsc audio products, inc. Td-000083-00 input daughterboard assembly (qsc part # wp-000178-00) where used: powerlight 6.0 pfc and powerlight 9.0 pfc , 120 and 230 volts. This is a subassembly of the input pcb assembly (wp-000265-00 or wp-000175-00); one per amplifier. Qsc part # description qty com...

  • Page 45

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 43 parts lists ch-000091-00 clamp, to-264, 5.1", pl9.0, 2 ch-000091-01 clamp, to-264, 4.5", pl9.0, 3 ch-000074-00 heat sink, audio, 8", pl9.0, 3 ch-000075-00 heat sink, audio, 14", pl9.0, 1 co-000074-00 header, 0.1" centers, ...

  • Page 46

    44 qsc audio products, inc. Td-000083-00 qd-000109-30 diode zener, 4.7v, , 0.3w, bzx84c4v7, sot-23, 1 d14 qd-000110-30 diode zener, 6.2v, , 0.3w, bzx84c6v2, sot-23, 6 d30, d31, d36, d43, d81, d83 qd-000111-30 diode zener, 12v, , 0.3w, bzx84c12, sot-23, 7 d3, d19, d40, d44, d46, d721, d722 qd-000114-...

  • Page 47

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 45 parts lists re-047502-30 475, 1 pcnt, 1/10w, thick film, 0805, 100v 16 r4, r21, r107, r118, r123, r129, r132, r145, r147, r153, r159, r171, r174, r177, r196, r410 re-047506-30 475, 1 pcnt, 1/4w, thick film, 1210, 200v 1 r2...

  • Page 48

    46 qsc audio products, inc. Td-000083-00 re-321002-10 210k, 0.1 pcnt, 1/4w, metal film, , 25ppm 23 r24, r28, r33, r36, r39, r44, r195, r204, r211, r225, r232, r234, r241, r253–r260, r331, r334 re-330902-30 309k, 1 pcnt, 1/10w, thick film, 0805, 100v 3 r60, r64, r81 re-339005-bc 390k, 5 pcnt, 1/4w, c...

  • Page 49

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 47 parts lists ca-647003-10 47uf, 10 pcnt, 10v, electrolytic, , non-polar low profile 10 c28, c88, c89, c98, c108, c114, c121, c127, c131, c742 ca-710001-10 100uf, 20 pcnt, 35v, electrolytic, , 1 c59 ca-922002-00 22000uf, 20 ...

  • Page 50

    48 qsc audio products, inc. Td-000083-00 qd-000105-30 transistor npn, 300v, 0.2a, 0.2w, mmbta42, sot-23, 6 q6, q18, q19, q21, q22, q30 qd-000106-30 transistor pnp, 300v, 0.2a, 0.2w, mmbta92, sot-23, 4 q9, q15, q32, q169 qd-000107-30 jfet n-channel, 35v, , , pmbfj112, sot-23, rds on 50 ohms 2 q29, q7...

  • Page 51

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 49 parts lists re-022100-30 221, 1 pcnt, 1/10w, thick film, 0805, 100v 8 r22, r92, r136, r148, r152, r173, r176, r178 re-030900-30 309, 1 pcnt, 1/10w, thick film, 0805, 100v 16 r31, r38, r124, r125, r127, r130, r133, r135, r1...

  • Page 52

    50 qsc audio products, inc. Td-000083-00 re-229402-30 29.4k, 1 pcnt, 1/10w, thick film, 0805, 100v 5 r12, r106, r263, r706, r707 re-239202-30 39.2k, 1 pcnt, 1/10w, thick film, 0805, 100v 23 r3, r5, r15, r20, r46, r56, r72, r76, r95, r98, r105, r202, r203, r226, r233, r248, r261, r268, r281, r287, r2...

  • Page 53

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 51 parts lists ca-822200-ae 2200uf, 20 pcnt, 200v, electrolytic, , 6 c132, c133, c136, c137, c140, c141 ch-000103-00 clamp, to-3pl, 22 ga, plx3002, 3 ch-000262-00 heat sink, pfc, 11", evictor, 1 ch-000263-00 heat sink, main s...

  • Page 54

    52 qsc audio products, inc. Td-000083-00 re-068001-10 680, 5 pcnt, 2w, metal oxide fp, mini, 1 r175 re-090901-30 909, 1 pcnt, 1/10w, thick film, 0805, 100v 1 r26 re-093101-30 931, 1 pcnt, 1/10w, thick film, 0805, 100v 1 r380 re-113302-30 1.33k, 1 pcnt, 1/10w, thick film, 0805, 100v 1 r22 re-120002-3...

  • Page 55

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 53 parts lists ca-347002-30 0.047uf, 20 pcnt, 50v, ceramic z5u, 0805, 9 c3, c4, c11–c13, c15, c28, c64, c81 ca-410011-00 0.1uf, 10 pcnt, 400v, film, dipped, 3 c14, c107, c123 ca-410012-30 0.1uf, 10 pcnt, 25v, ceramic x7r, 080...

  • Page 56

    54 qsc audio products, inc. Td-000083-00 re-.49900-30 4.99, 1 pcnt, 1/8w, thick film, 1206, 200v 2 r359, r360 re-000002-30 0, , , thick film, 0805, jumper 1 r61 re-000210-nr ntc, 10 ohms, 15 amps, , , inrush limit 1 r324 re-000230-nr ntc, 10k, , 15 pcnt, , -4.4 pcnt per c 1 r28 re-001003-30 10, 1 pc...

  • Page 57

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 55 parts lists power supply assembly (qsc part # wp-000262-00) where used: powerlight 6.0 pfc , 120 volts this is a subassembly of the chassis assembly, wp-000260-00; two per amplifier. Part number description qty comments re...

  • Page 58

    56 qsc audio products, inc. Td-000083-00 re-224902-10 24.9k, 1 pcnt, 1/4w, metal film, , 1 r28 re-230103-10 30.1k, 1 pcnt, 1/4w, metal film, , 2 r39, r40 re-247003-00 47k, 5 pcnt, 2w, metal oxide fp, , 1 (two diff. Prep) prep at vertical position /use .050 spacer r31 re-247003-00 47k, 5 pcnt, 2w, me...

  • Page 59

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 57 parts lists hw-080006-so spacer, 0.312" round, #8, 0.470" l, aluminum, swage 2 apply the swage tool, install on top side hw-080080-ps stud, pem style, #8-32, 0.500" l, tin plated bronze, 2 e2,3 ic-000064-00 driver, mosfet,...

  • Page 60

    58 qsc audio products, inc. Td-000083-00 wc-000133-00 jumper, teflon insulation, 16 awg solid, 1 conductor, , 1.75" l, 2 t2,3 wc-000137-00 jumper, pvc insulation, 14 awg, 1 conductor, , 1.3" l, 3 w12–w13 wc-2.5218-jw jumper, teflon insulation, 18 awg, 1 conductor, , 2.5" l, 0.250" lead length 1 w8 w...

  • Page 61

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 59 parts lists qd-000102-30 diode, 75v, 0.075a, , imbd4148, sot-23, 4ns 5 d1, d6, d11, d13, d15 qd-000103-30 transistor npn, 40v, 0.2a, 0.2w, mmst3904, sot-23, 7 q3–q5, q7–q10 qd-000104-30 transistor pnp, 40v, 0.2a, 0.2w, mms...

  • Page 62

    60 qsc audio products, inc. Td-000083-00 power supply assembly (qsc part # wp-000173-00) where used: powerlight 9.0 pfc , 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, cerami...

  • Page 63

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 61 parts lists re-210001-bm 10.0k, 1 pcnt, 1/4w, metal film, , 4 r9–r12 re-224902-10 24.9k, 1 pcnt, 1/4w, metal film, , 1 r28 re-230103-10 30.1k, 1 pcnt, 1/4w, metal film, , 2 r39, r40 re-247003-00 47k, 5 pcnt, 2w, metal oxid...

  • Page 64

    62 qsc audio products, inc. Td-000083-00 hw-080006-so spacer, 0.312" round, #8, 0.470" l, aluminum, swage 2 hw-080080-ps stud, pem style, #8-32, 0.500" l, tin plated bronze, 2 e2,3 ic-000064-00 driver, mosfet, 4452bn, , 2 u1, u3 ms-000113-00 fuse, 1a, 250v, 5mm x 20mm, slo-blo 1 f1 nw-060000-pi pres...

  • Page 65

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 63 parts lists wc-000133-00 jumper, teflon insulation, 16 awg solid, 1 conductor, , 1.75" l, 2 t2,3 wc-000137-00 jumper, pvc insulation, 14 awg, 1 conductor, , 1.3" l, 3 w11–w13 wc-2.5218-jw jumper, teflon insulation, 18 awg,...

  • Page 66

    64 qsc audio products, inc. Td-000083-00 qd-000103-30 transistor npn, 40v, 0.2a, 0.2w, mmst3904, sot-23, 7 q10, q4, q5, q7, q8, q9, q3 qd-000104-30 transistor pnp, 40v, 0.2a, 0.2w, mmst3906, sot-23, 3 q12, q2, q14 qd-000114-30 diode zener, 150v, , 600w peak, p6smb150at3, smb, 1 d3 qd-000115-30 diode...

  • Page 67

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 65 parts lists pt-310000-cr gain, 10k, 20 pcnt, 0.2w, 11 detent, 2 r509, r609 qd-000052-00 led green, , , , , t-1, diffused 4 ld503, ld603, ld507, ld607 qd-000053-00 led yellow, , , , , t-1, 6 ld502, ld505, ld506, ld602, ld60...

  • Page 68

    66 qsc audio products, inc. Td-000083-00 line filter assembly (qsc part number wp-000181-00) where used: all models, 230 volts this is a subassembly of the chassis assembly; one per amplifier. Qsc part # description qty comments reference ca-215001-00 0.0015uf, 20 pcnt, 125vac, ceramic, disc, ycap 4...

  • Page 69: Matched Fets

    Powerlight 9.0 pfc , powerlight 6.0 pfc , powerlight 6.0 ii service manual 67 parts lists matched fets where used: pl 6.0 pfc , pl 9.0 pfc 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 ...

  • Page 70: 5. Schematic Diagrams

    68 qsc audio products, inc. Td-000083-00 5. Schematic diagrams.

  • Page 71

    Technical service manual 69 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 220p c1 powerlight 6.0 pfc powerlight 6.0 ii powerlight 9.0 pfc input daughterboard.

  • Page 72

    70 qsc audio products, inc. Td-000083-00 sw1:3 sw1:4 sw1:1 sw1:2 u400:2 tl072 u400:1 tl072 220p c400 220p c402 220p c300 220p c302 u300:2 tl072 u300:1 tl072 e3 e2 powerlight 6.0 pfc powerlight 6.0 ii input board.

  • Page 73

    Technical service manual 71 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc = signal path = signal path (opp. Polarity) sw1:3 sw1:4 sw1:1 sw1:2 u400:2 tl072 u400:1 tl072 220p c400 220p c402 220p c300 220p c302 u300:2 tl072 u300:1 tl072 e3 e2 powerlight 9.0 pfc input board.

  • Page 74

    72 qsc audio products, inc. Td-000083-00 15 v node n289 “ana gnd” pp. 5a7 & 7d4 15 v node n289 “ana gnd” pp. 5a7 & 7d4 9 10 11 12 13 14 15 16 22u-25v c68 22u-25v c63 pre_lim pre_lim -15v_ -15v_ +15v_ +15v_ smps_v smps_v post_pot_p post_pot_p post_pot_n post_pot_n ch_in_p ch_in_p b1_n b1_p reref -pol...

  • Page 75

    Technical service manual 73 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 15 v node n289 “ana gnd” pp. 5a7 & 7d4 15 v node n289 “ana gnd” pp. 5a7 & 7d4 9 10 11 12 13 14 15 16 22u-25v c68 22u-25v c63 pre_lim pre_lim -15v_ -15v_ +15v_ +15v_ smps_v smps_v post_pot_p post_pot_p post_pot...

  • Page 76

    74 qsc audio products, inc. Td-000083-00 = signal path a_vn a_+15v a_v_mon a_protect a_clip pwr_gnd pwr_gnd a_clip_feed j501:16 j501:9 j501:10 j501:11 j501:12 j501:13 j501:14 j501:15 +pol+ a_pot_top a_post_pot_n a_post_pot_p sig_gnd a_standby_led sig_gnd a_vp a_reref j501:2 j501:3 j501:4 j501:5 j501...

  • Page 77

    Technical service manual 75 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc = signal path b_standby_led sig_gnd b_+15v b_v_mon b_protect pwr_gnd pwr_gnd b_clip_feed b_clip j601:16 j601:13 j601:14 j601:15 j601:9 j601:10 j601:11 j601:12 j601:6 j601:7 j601:8 b_vp b_vn j601:2 j601:3 j601:...

  • Page 78

    76 qsc audio products, inc. Td-000083-00 limiter is shown in "fast clip-tracking"mode. To convert to a slow attack/release limiter, open the 3 places shown shorted with lines, and make the connection shown by the arrow line. Vp vn gain_retard gain = 1.67 5 + 6 - 7 reref -pol- pre_lim +15v_ vp 11 6 3...

  • Page 79

    Technical service manual 77 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc limiter is shown in "fast clip-tracking"mode. To convert to a slow attack/release limiter, open the 3 places shown shorted with lines, and make the connection shown by the arrow line. Vp vn gain_retard gain = ...

  • Page 80

    78 qsc audio products, inc. Td-000083-00 27 v 3 + 2 - 1 3 volts here signifies 50 amps output, so load is likely 2 ohms. Vn 3 + 2 - 1 i_mon shed_v _n_step _v50 vn protect 3 + 2 - 1 vn vn vn 5 + 6 - 7 vn g d s v_mon loss_of_feedback clamp_sig 3 + 2 - 1 _n_step 5 + 6 - 7 note: this opamp must not clam...

  • Page 81

    Technical service manual 79 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 27 v 3 + 2 - 1 3 volts here signifies 50 amps output, so load is likely 2 ohms. Vn 3 + 2 - 1 i_mon shed_v _n_step _v50 vn protect 3 + 2 - 1 vn vn vn 5 + 6 - 7 vn g d s v_mon loss_of_feedback clamp_sig _n_step ...

  • Page 82

    80 qsc audio products, inc. Td-000083-00 12.4 v 40 v node n182 “b3_p” (through 150 resistor) Ω p. 1c1 c126 22u-25v b3_n _vbot 22u-25v c125 cw ccw w 5 u21:3 ca3054m96 14 13 4 3 2 1 ca3054m96 u21:1 dn_drv hot 22u-25v c129 _bop pm_ref ix3 dr3 dr1 ix1 _bgnd _vbot _vt o p _bgnd _bop _vt o p _vbot _bgnd _...

  • Page 83

    Technical service manual 81 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 12.4 v 40 v node n182 “b3_p” (through 150 resistor) Ω p. 1c1 c126 22u-25v b3_n _vbot 22u-25v c125 cw ccw w 5 u21:3 ca3054m96 14 13 4 3 2 1 ca3054m96 u21:1 dn_drv hot 22u-25v c129 _bop pm_ref ix3 dr3 dr1 ix1 _b...

  • Page 84

    82 qsc audio products, inc. Td-000083-00 20 v 30 v 40 v node n105 “b3_n” pp. 2a7 & 7b5 dr3 ix3 11 4 el2257c u14:3 b3_p 1 + 14 - 13 3 2 c e u14:1 el2257c 7 + 8 - 9 5 6 c e u14:2 el2257c d s g d s g _vbot pm_ref dr2 ix2 11 4 el2257c u11:3 b2_n b2_p 1 + 14 - 13 3 2 c e u11:1 el2257c 7 + 8 - 9 5 6 c e u...

  • Page 85

    Technical service manual 83 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 20 v 30 v 40 v node n105 “b3_n” pp. 2a7 & 7b5 dr3 ix3 11 4 el2257c u14:3 b3_p 1 + 14 - 13 3 2 c e u14:1 el2257c d s g 7 + 8 - 9 5 6 c e u14:2 el2257c d s g _vbot pm_ref dr2 ix2 11 4 el2257c u11:3 b2_n b2_p 1 +...

  • Page 86

    84 qsc audio products, inc. Td-000083-00 15 v node n273 “+15v_” p. 4b7 15 v node n284 “-15v_” p. 4b7 11 v 11 v hot=250ua @ 80 deg c. The "hot" threshold is 80°c cutback begins at 100°c and full shutdown happens at 110°c. (±3 degrees) 3 + 2 - 1 u1 2.5v-1% vp hot 5v = 100 deg c. C55 22u-25v 4 3 fan id...

  • Page 87

    Technical service manual 85 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 15 v node n273 “+15v_” p. 4b7 15 v node n284 “-15v_” p. 4b7 11 v 11 v hot=250ua @ 80 deg c. The "hot" threshold is 80c cutback begins at 100c and full shutdown happens at 110c. (+/- 3 degrees) 3 + 2 - 1 u1 2.5...

  • Page 88

    86 qsc audio products, inc. Td-000083-00 powerlight 6.0 pfc powerlight 6.0 ii powerlight 9.0 pfc line filter, 120 volts.

  • Page 89

    Technical service manual 87 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc powerlight 6.0 pfc powerlight 6.0 ii powerlight 9.0 pfc line filter, 230 volts.

  • Page 90

    88 qsc audio products, inc. Td-000083-00 powerlight 6.0 pfc powerlight 6.0 ii powerlight 9.0 pfc output board.

  • Page 91

    Technical service manual 89 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc 2 1 2 1 d drain s source c control 2 6 3 7 10 9 14 13 b4_n b4_p b3_n b3_p 2 1 6 4 1 2 8 7 22u-25v c1 1 1 22u-25v c107 12 11 b2_p b2_n vn b1_n 22u-25v c62 vp b1_p +15v 8 4 8 4 8 4 8 4 8 4 8 4 vn vp 8 4 c7 22u-2...

  • Page 92

    90 qsc audio products, inc. Td-000083-00 40 v node n182 “b3_p” (through 150 resistor) Ω p. 1c1 27 v 11 v 11 v 20 v 30 v 2 1 2 1 d drain s source c control 2 6 3 7 10 9 14 13 b4_n b4_p b3_n b3_p 2 1 6 4 1 2 8 7 22u-25v c1 1 1 22u-25v c107 12 11 b2_p b2_n vn b1_n 22u-25v c62 vp b1_p +15v 8 4 8 4 8 4 8...

  • Page 93

    Technical service manual 91 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc powerlight 6.0 pfc power supply controller board.

  • Page 94

    92 qsc audio products, inc. Td-000083-00 powerlight 6.0 pfc power supply.

  • Page 95

    Technical service manual 93 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc powerlight 9.0 pfc power supply controller board.

  • Page 96

    94 qsc audio products, inc. Td-000083-00 powerlight 9.0 pfc power supply.

  • Page 97

    Technical service manual 95 powerlight 6.0 ii, powerlight 6.0 pfc , and powerlight 9.0 pfc pri_lo v+17.2 relay/amp_drive xfm_ntc+ xfm_ntc- pfc_ntc+ pfc_ntc- cor_ntc+ cor_ntc- pri_lo v+17.2 pri_lo pri_lo shutdown_not v+17.2 pri_lo pri_lo pri_lo relay/amp_drive neutral pri_lo v+17.2 pri_lo hot pri_hi ...

  • Page 98

    96 qsc audio products, inc. Td-000083-00 pri_lo cut board out, under body v+5 pri_lo relay/amp_drive v+5 3 + 2 - 1 pri_lo 2.5v scale factor 1v = 150v 375v to 385v reg range 5 + 6 - 7 pri_lo v+5 pri_lo stop threshold pri_lo ac_line_lo neutral pri_hi hot ac_line d15 >> d18 pump_pos pri_hi 2 watts max ...

  • 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.