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QSC PowerLight Series Technical & Service Manual
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PowerLight™ Series
T
w
o-Channel P
ower Amplifier
s
TECHNICAL SER
VICE MANU
AL
*TD-000083-00*
TD-000083-00
Re
v
.
Prelim.
▲
▲
▲
▲
▲
P
o
werLight 6.0
II
▲
▲
▲
▲
▲
P
o
werLight 6.0
PFC
▲
▲
▲
▲
▲
P
o
werLight 9.0
PFC
ON
OFF
PROTECT
STANDBY
POWER
1
CHANNEL
2
9000
WATT
POWER F
ACTOR
CORRECTED
PROFESSIONAL
AMPLIFIER
22
22
32
32
24
24
26
26
28
28
30
30
-0
0
-0
0
20
20
18
18
14
14
88
dB
1
-CHANNEL-
2
dB
CLIP
-10dB
-20dB
SIGNAL
CLIP
LIMITER
POWERLIGHT
9
.0
PFC
HEAR THE
PO
WER
OF TECHNOLOGY
.
2
Table of Contents
Default Chapter
5
Default Chapter
5
Table of Contents
5
Performance Specifications
6
1 Introduction
7
Service Bulletins
7
The Well-Equipped Service Bench
7
Working with Surface-Mount Components
7
Two-Terminal Components (Resistors, Capacitors, Diodes, Etc.)
7
Multi-Pin Components (Ics, Etc.)
8
Three-Terminal Components (Transistors, Etc.)
8
Series Description
8
Technical Descriptions and Theory of Operation
9
Power Supplies
9
Audio Circuitry
9
2 Servicing the Amplifier
10
Mechanical Disassembly and Reassembly
10
Introduction
10
Tools and Materials Needed
10
Disassembly
10
Reassembly
13
The Display Board
15
AC Line Filter
15
Power Supply Servicing
17
Bench Testing Power Supply Modules
17
Replacing Switching Mosfets in PFC Models
17
Suggestions for Troubleshooting
19
Adjusting and Calibrating the Power Supply Module
20
AC Voltage Conversions
24
Bias Adjustments
24
3 Troubleshooting
25
Initial Check
25
Preliminary Troubleshooting
25
Further Troubleshooting
26
4 Parts
27
Semiconductor Package Descriptions and Pinouts
27
Parts Lists
35
Chassis Assembly (QSC Part #WP-000268-00)
35
Chassis Assembly (QSC Part # WP-000268-02)
36
Chassis Assembly (QSC Part # WP-000260-00)
37
Chassis Assembly (QSC Part # WP-000260-02)
38
Chassis Assembly (QSC Part # WP-000170-00)
39
Chassis Assembly (QSC Part # WP-000170-02)
40
Chassis Assembly, Rear (QSC Part # WP-000271-00)
41
Chassis Assembly, Rear (QSC Part # WP-000264-00)
41
Chassis Assembly, Rear (QSC Part # WP-000172-00)
42
Output PCB Assembly (QSC Part # WP-000179-00)
42
Input PCB Assembly (QSC Part # WP-000272-00)
42
Input PCB Assembly (QSC Part # WP-000265-00)
43
Input PCB Assembly (QSC Part # WP-000175-00)
43
Input Daughterboard Assembly (QSC Part # WP-000178-00)
44
Audio Channel Module Assembly (QSC Part Number WP-000276-00)
44
Audio Channel Module Assembly (QSC Part # WP-000182-00)
48
Power Supply Assembly (QSC Part # WP-000266-00)
52
Power Supply Assembly (QSC Part # WP-000266-02)
54
Power Supply Assembly (QSC Part # WP-000262-00)
57
Power Supply Assembly (QSC Part # WP-000262-02)
58
Power Supply Controller Assembly (QSC Part # WP-000263-00)
60
Power Supply Assembly (QSC Part # WP-000173-00)
62
Power Supply Assembly (QSC Part # WP-000180-00)
63
Power Supply Controller Assembly (QSC Part # WP-000174-00)
65
Display PCB Assembly (QSC Part Number WP-000176-00)
66
Line Filter Assembly (QSC Part Number WP-000177-00)
68
Line Filter Assembly (QSC Part Number WP-000181-00)
68
Matched Fets
69
5 Schematic Diagrams
70
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User Manual
36 pages
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QSC PowerLight Series Specifications
General
Channels
2
Input Impedance
20kΩ balanced, 10kΩ unbalanced
Cooling
Variable speed fan
Connectors
XLR, Speakon, binding posts
Protection
Thermal, short circuit
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