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QSC PowerLight Series Technical & Service Manual - 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 make high-density circuitry that is reliable and economical
to manufacture.
SMT components in the PowerLight amps are used in the small-
signal and control circuits, so they do not handle significant
amounts of power; therefore, they are subject to very little stress
and should seldom fail. Sometimes they do fail, or they require
replacement for a performance upgrade or modification. Thus, it is
important to know how to work with SMT components.
Specialized tools and equipment exist for soldering, unsoldering,
and removing SMT components quickly and efficiently, but they are
often expensive. Most SMT repairs, though, can be handled reason-
ably well with common tools and equipment, such as tweezers,
solder braid, and fine-tip soldering irons.
Two-terminal components (resistors, capacitors,
diodes, etc.)
Removal
1. Use two soldering irons, prefer-
ably about 25 to 40 watts, with
fine tips.
2. With a soldering iron in each
hand, hold one tip on the solder at
one end of the component and the
other tip on the other end (Figure
1.1).
3. Once the solder melts on both
ends, grip the component
between the two tips and lift it
from the circuit board.
4. Use solder braid and a soldering
iron to remove the solder from the
two pads (Figure 1.2).
Insertion
1. With a soldering iron and 60/40 or 63/37 eutectic-type solder,
melt just enough solder onto one pad to create a small mound
(Figure 1.3).
2. Grasp the component in the middle with tweezers. Melt the
small mound of solder with the iron and place the component
across the two pads (in the correct orientation, if the compo-
nent is sensitive to direction) and press it flat against the circuit
board, with one end of the component immersed in the melted
solder (Figure 1.4).
3. Hold the component in place and take the soldering iron away.
1.1 Service bulletins
Contact QSC Technical Services to make sure you have the most
up-to-date service bulletins for PowerLight Series amplifiers.
Service bulletins may be distributed in hard copy, via fax, and
electronically (Adobe Acrobat PDF) via CD-ROMs, FTP from the QSC
web site (www.qscaudio.com), and e-mail.
These service bulletins had been issued at the time this manual
was printed: PFC0001, “PFC MOSFET Replacement” (PowerLight
6.0
PFC
and PowerLight 9.0
PFC
only); PFC0002, “PFC Power Supply
Replacement Guidelines” (PowerLight 6.0
PFC
and PowerLight 9.0
PFC
only); and PFC0003, “Amplifier Goes Into Protect When Turned On”
(all three models).
1.2 The well-equipped service
bench
To properly service QSC amplifiers, a technician needs the right
tools. The technician’s service bench should have the following
equipment:
• Digital multimeter with RMS AC voltage and current
• Digital clamp-on ammeter
• Dual-trace oscilloscope
• Audio distortion analyzer
• Non-inductive load resistors, configurable as 8 ohms (min. 1800
watts capacity), as 4 ohms (min. 3200 watts capacity), and as
2 ohms (min. 4500 watts capacity)
• Variable AC voltage source, such as a Variac or Powerstat
variable transformer, with a rated current capacity of up to 50A
(for 120V models) or 25A (for 230V models)
• Low-distortion audio sine wave generator
• Philips and flat screwdrivers
• Soldering iron with a fine tip (25–60W recommended)
• Rosin-core solder (60/40 or 63/37)
• Long-nose pliers
• Diagonal cutters
• Wire strippers
Automated test equipment, such as an Audio Precision worksta-
tion, is very useful for servicing PowerLight amplifiers. Contact
QSC Technical Services to obtain applicable AP test files.
Servicing power supply modules will require some additional
special-built equipment:
• Power supply remote controller
• PFC power supply fixture (for PFC modules only)
• CMP box
Becauseof the complexity of the PFC power supplies, QSC
recommends they be serviced only by QSC.
Figure 1.1.
Figure 1.2.
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...
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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,...
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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...
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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.
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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.
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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.
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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.
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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...
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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...
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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...
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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...
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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 = ...
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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...
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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 ...
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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 _...
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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...
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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...
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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 +...
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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...
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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...
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86 qsc audio products, inc. Td-000083-00 powerlight 6.0 pfc powerlight 6.0 ii powerlight 9.0 pfc line filter, 120 volts.
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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...
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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 ...
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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 ...
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“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.