45
TD-000487-00
K Series Service Manual
SH4: B3 & C4
SH4: C4 &
SH3: B4
SH4: B2 & C2
T106-26B 79T 18AWG
ON ABOUT 24VAC
OC = 26.1A = 0.75V
+85V
-85V
OFF IN 30MS
+7V
TOTAL OPERATING CURRENT = 32MA
GATE DRIVE CURRENT:
(102NC + 40NC) * 200K = 29MA
UCC2893 RUN CURRENT = 3MA MAX
AC DETECTOR
0.5*960UF*375V^2 = 67.5J
22AWG AUX
100X40AWG LITZ SEC
100X40AWG LITZ PRI
EE42 3C90
LINEUV = 1.27V
UNIVERSAL INPUT POWER SUPPLY
MMST3904
MMST3904
IMBD4148
20 PCNT
1.0UF
1 PCNT
1.13K
1 PCNT
1/10W
BAS21
1/10W
10
10 PCNT
25V
20 PCNT
125VAC
STW26NM60
500V
1 PCNT
2.21K
7.87K
IMBD4148
11K
1 PCNT
1/8W
82.5K
20 PCNT
1.0UF
20 PCNT
MOC205R2V-M
1800UF
5 PCNT
100
25V
16V
1000UF
1.0A
24V
1 PCNT
2W
100
ZR431
100V
5 PCNT
1800UF
100
MMBTA42
1W
11K
1/10W
1 PCNT 5 PCNT
120PF
5 PCNT
200V
ES1D
2SC2655
BAT54S
100V
0.68UF
5 PCNT
BAS21
FFP08S60S
100V
1 PCNT
2.87
220PF
50V
5 PCNT
1.00K
1 PCNT
IMBD4148
1/10W
BAS21
20 PCNT
16V
1.0UF
UCC2893
16V
5 PCNT
5 PCNT
1W
1W
1W
1 PCNT
82.5K
1 PCNT
5 PCNT
1 PCNT
1/10W
20 PCNT
1/10W
1 PCNT
1/10W
1/8W
0.022UF
1 PCNT
10 PCNT
25V
0.1UF
1/10W
1 PCNT
1/10W
1 PCNT
1/10W
1 PCNT
100K
1/10W
63.4K
1 PCNT
4MH
1/8W
1/8W
1 PCNT
243K
100K
6.34K
1.5
5 PCNT
1W
0.047UF
10 PCNT
250V
250V
0.047UF
10 PCNT
1W
1.5
56K
1W
0.68UF
1/10W
3.65K
3.65K
1 PCNT
1/10W
5 PCNT
MBR230
20 PCNT
2W
100
500V
5 PCNT
100PF
500V
2W
5 PCNT
FFP08S60S
1/10W
1 PCNT
6.34K
100UF
20 PCNT
100UF
150K
1 PCNT
0.68UF
10 PCNT
250VAC
0.1UF
1/10W
17.8K
1 PCNT
1/8W
1/8W
150K
1 PCNT
500V
10 PCNT
0.022UF
500V
10 PCNT
KBU1005
20 PCNT
82.5K
100UF
100
250VAC
1 PCNT
1 PCNT
200V
10 PCNT
25V
25V
10UF
20 PCNT
1/10W
63.4K
MOC205R2V-M
1 PCNT
1 PCNT
1/10W
0.1UF
25V
10 PCNT
MBR230
0.1UF
1 PCNT
1/8W
10
1/8W
10
1 PCNT
MBR230
1 PCNT
21
1/10W
16V
1.0UF
20 PCNT
16V
ES1D
10 PCNT
0.1UF
25V
LM78L12A
20 PCNT
1000UF
16V
IMBD4148
5 PCNT
200V
120PF
1/10W
1 PCNT
100
16V
20 PCNT
1.0UF
1 PCNT
1/10W
ES1D
1/10W
1/8W
1/8W
20 PCNT
5 PCNT
10 PCNT
0.68UF
4MH
125VAC
NTC
10A
1 PCNT
243K
1 PCNT
243
1.0A
120PF
ES1D
5 PCNT
250V
0.68UF
200V
120PF
MBR230
24V
25V
ES1D
100
1/10W
25V
24V
1.0A
STP11NM60FD
250V
0.0022UF
100
2.5 OHMS
125VAC
20 PCNT
0.0022UF
243
400V
20 PCNT
470UF
400V
20 PCNT
470UF
1/10W
250VAC
0.1UF
100
20 PCNT
1/10W
1/10W
5 PCNT
100PF
11K
82.5K
10 PCNT
5 PCNT
20 PCNT
11K
1W
5 PCNT
5 PCNT
250V
5 PCNT
1.13K
1 PCNT
BAS21
UCC2893
0.1UF
10 PCNT
25V
1/10W
1 PCNT
768
220PF
10 PCNT
250VAC
0.0022UF
29.4K
11K
1 PCNT
0.022UF
1/10W
10 PCNT
500V
0.022UF
774UH
SH-003311-00
AR-003311-00.ZIP
NONE
D33
D34
D43
D40
D27
D25
D28
D31
D32
D29
D24
D23
BR1
Q13
Q14
T1
T1
T3
T3
D35
C115
C118
C148
C128
C137
C125
C129
D38
D39
C133
C134
R165
R157
R161
R162
F2
F3
C126
C127
C135
C136
C116
C112
C113
C114
R144
R145
R146
R147
L13
L12
L11
C108
C102
C101
C104
C105
C124
R140
F1
J14
J15
R142
R143
R141
R150
R149
R151
R158
R155
C145
R153
C117
Q11
Q12
D22
C110
C107
C106
R137
R136
R135
R138
R148
R170
R175
Q15
C149
R171
U15
U15
R164
R133
R134
C111
R139
T2
T2
SG1
R152
R172
C38
W1
T2
T2
R76
C52
R166
U6
F4
R8
D36
D37
Q16
C46
C89
U3
D7
C90
U16
U3
R57
R59
R58
R64
C1
C19
C20
R65
C33
R66
C22 R187
R168
C21
R184
R174
C25
D14
MTG5 MTG7
MTG6 MTG8
MTG9
R185
R186
C130
C132
R188
R189
QCL-DR
QM-DR
+VCC
+12VLOW
PRI_LO
PRI_LO
PRI_HI
-VCC
PSU-VSW
PSU-BIAS
PSU-BIAS
QCL-DR
PSU-VSW
-VCC
QM-DR
PRI_LO
1
2
3
4
1
3
4
2
6
5
6
12
7
9
15
13
8
1
3
2
10
5
16
4
6
11
14
1
3
5
6
11
8
9
10
12
7
2
1
3
1
2
2
3
6
7
8
1
6
7
5
1
-15V
+15V
B2
B1
P1
A1
A2
P1
A1
VOUT
VIN
P1
S10
S12
S7
S9
S11
S8
-
AC2
AC1
+
P1
OUT
P1
B6
B5
P3
P1
GND
PGND
VDD
FB
VREF
AUX
OUT
CS
SYNC
SS_SD
RSLOPE
RTOFF
RTON
RTDEL
LINEUV
VIN
OUT
VDD1
C2
B1
B2
A2
A1
B1
B2
A2
A1
P1
OUT
INFORMATION WHICH IS THE PROPERTY
WITHOUT EXPRESS WRITTEN CONSENT FROM
C
SIZE
SCALE
CAGE CODE
DWG NO.
REV
4
3
2
4
3
2
1
1
00PW4
CAD FILE NO.
BE DISCLOSED, REPRODUCED OR USED
OF QSC AUDIO PRODUCTS, THAT MAY NOT
THIS DOCUMENT CONTAINS PROPRIETARY
REGULATED, FIXED FREQUENCY 200K HZ,
ACTIVE CLAMP FLY-BACK POWER SUPPLY
regulated
regulated
T2: XF-000362-00
U16: IC-000431-30
U15: IC-000412-30
Q15: QD-000105-30
U6: IC-000157-30
C25: CA-810009-01
OLD REV: 100 UF, 16V
Q16: QD-000394-10
D14&D29: QD-000108-30
F2, F3, F4: MS-000115-30
T1: XF-000360-30
T2: XF-000362-00
T3: XF-000361-30
OLD REVISIONS
R141: 3.65K; R143: 75K
R141: RE-178701-30
R143: RE-263401-30
U15: IC-000412-30
F1: MS-10.250-FU
BR1: QD-000372-00
Q13: QD-000376-00
Q14: QD-000284-00
STATIC CHECK MOSFETS Q13 & Q14 IN CIRCUIT:
- Q13: GS = 1.3K (0.48V);
GD = 1M/33K (OL/0.9V); DS = 1M (0.5V/OL)
- Q14: GS = 1K/12K (0.124V/2V);
GD = >2OK (>2V); DS = >1M (0.5V/OL)
RAB
DD
DD
RAB
C1
5
C
C
D
B
A
B
D
QSC AUDIO PRODUCTS.
REV
A
APPROVED/DATE
SHEET 1 OF
C1
2 OF 5
C
D
B
A
B
C
SHEET
A
D
QSC AUDIO PRODUCTS.
C1
3 OF 5
C
D
B
A
B
C
SHEET
A
D
QSC AUDIO PRODUCTS.
C1
4 OF 5
C
D
B
A
B
C
SHEET
A
D
QSC AUDIO PRODUCTS.
C1
5 OF 5
C
D
B
A
B
C
SHEET
A
D
QSC AUDIO PRODUCTS.
TESTING MOSFET IN CIRCUIT
*
With DIODE-CHECK
**
With RESISTANCE-CHECK
Reference
G --> S
G --> D
D --> S
S --> D
Q13
Q14
0.45V
OL
0.42V
OL
> 2V
0.50V
> 2V
0.125V
Reference
G --> S
G --> D
D --> S
S --> D
Q13
Q14
1.13k
> 1M
> 1M
> 1M
> 1M
> 1M
> 1M
> 900
Summary of Contents for K8
Page 2: ...2 QSC Audio Products LLC...