Kenwood kac-PS520 Service Manual page 8

K L
SW5V
R63 13K
B
+B
C55
2
C49 C51 C53
1 2.2
2.2 0.22 0.22 3
IC6(2/2)
INFRASONIC
FILTER
C54 IC7(2/2)
C56
0.22 3
1 2.2
2
C50 C52 R64
2.2 0.22 13K
R260
10K
S2
C140
47P
R256
C60
10K
2
10u16
1
3
+
IC5(2/2)
INVERTER
+B
B
+B +B
+B +B
+B
B B
+B +B
B B
B B
+5V
Q43,46,47
C95 0.1
MUTE
R175 100K
R158
R153 R155
Q46 10K
Q43
1K 5.6K
Q47
5V
1
0V
1 5V SW
2
5V
NC
0V 3 5V
3 FAN
0V
MUTE
R167
4
22K 22K R184
NC
Q44
100K 5.0V 5
D VOLTAGE
C139 5V
22K 6
33u10 6 V DOWN 0V
R185 5.0V 7
+
D44 D CURRENT
100K
8
Q49
AB VOLTAGE
IC11
5V
Q48,49
0V
SP. DC u-COM
OFFSET
Q48 DETECTOR
R161
Q45
22K 9
+B AB CURRENT
5V
0V
R159
Q45
20K
R181
R170 220
2 4.7K 10
BLUE 5V
Q52 0V
R182
R169 560
Q50 4.7K
3 11
GREEN
Q50-52
LED
SWITCHING
5V
R183
0V
R168 270
4
Q51 4.7K
5V
R186 47K
5.0V 0V
+5V
IC10
X1
4.19MHz
RESET
IC
SW5V
M N
C117 R213 R214 C118
1500P 10 10 1500P
1/2W 1/2W
D60
S3
C119 C120
680u63 680u63
+ +
46.7V -46.7V
B
D62 R218
D61 10K
R217
10K
C121 C122
Q83 Q84
47u25 47u25
Q82
+ +
Q81-86
Q81
C123 C124
AVR
47u25 47u25
18.8V -18.8V
+ +
D64
D63
Q86
-15.4V
Q85
15.4V
C125 C126
47u25 47u25
C127 C128
+ +
10u16 10u16
+ + +
SW5V
+5V
5V
0V R239 22K
C104
34
0.1
D66
5V
0V
6
Q66
R273 Q53
2.2K
3
5V FAN INPUT SIDE
0V
SWITCHING MOMENTARY
33
BASS CON A 33 VOLTAGE-DOWN
DETECTOR
32
OFFSET CON 32 1
5V
31 0V
COM HU
5V 30
POWER
0V
29
NC SW5V
28
S4
NC
27
D POWER
26
BASS OFF
25
BASS REMO
24
5V BASS 12dB
23
0V
NC
C103 C102 C101
0.01 0.01 0.01
TH3 TH2 TH1
4
2.2K 2.2K 2.2K
3
2
SW5V SW5V
O P
L6
R203
Q79 Q77 Q75
+B 33
R205 100
B
+B
R206 100
R209 C113 C114 R210
R204
10 1500P 1500P 10
33
1/2W 1/2W
Q80 Q78 Q76
Q75-80 Q71-74
D56
D55
SWITCHING SWITCHING
POWER STAGE DRIVER
47.0V
-47.0V
SWITCHING
R211 R212 REGULATOR
IC12
33K 33K
C115 C116
1
C107
4700u56 4700u56 NI IN1
10u16
5.0V 2 NI IN2
+ + I IN1
+
3
FBACK REFOUT
0.5V 4
DTCONOUT
C108 1000P 5
CT
12V
3.3V
0V
0V
R200
16K
4.0V 6
RT
7
GND
13.6V 8
C1
C109
100u16
+B
+
R179
B
10
1/2W
L5
+B
D48
5V 14.4V
R229 R228
SWITCHING SWITCHING
Q62
L1
120 120
+5V +B
L2
Q63
R231 R230
Q65
R235
L3
120 120 Q60
47K
Q62-64
Q64
5V
C129
AVR
10u16
Q61
+
INPUT SIDE
Q69
R245
OVER-
22K
VOLTAGE-DOWN
DETECTOR
Q68
Q67
D49
Q68,69
P. CON
DETECTOR
Q70
D51
COMMUNICATION
DETECTOR
Q70 R250
R254 100
27K R249 4.7K R271
R180 R268 C92
10 1/2W 10 1/2W 0.047
L4
(X09- ) (B/2) KAC-PS520/X520 (E/K,M,J)
CN2
D45
4 4
3 3
2 2
1 1
CN1
Q R
CAUTION: For continued safety, replace safety critical com-
ponents only with manufacturer's recommended parts (refer
to parts list). indicates safety critical components. For
D53
Q71
continued protection against risk of fire, replace only with
same type and rating fuse(s). To reduce the risk of electric
shock, leakage-current or resistance measurements shall be
Q73
carried out (exposed parts are acceptably insulated from the
supply circuit) before the appliance is returned to the cus-
tomer.
D54
Q74
Q72
2SA1123 2SC2631
2SA1534A 2SC3940A
2SA733(A) 2SC945(A)
2SA965
2SA992
16
2SC1845
15 5.0V
2SC2235
I IN2
14
13
CON
12 13.6V
VCC
11
C2
10
E2
9 DTA124EK
E1
DTC124EK
2SC2412K
+14.4V
2SB1548
15 (FAN)
CN3
2
+B 1
(F07-1751-05)
CN4
+B
F2(30A)
(F52-0015-05)
J2
F1(30A)
(F52-0015-05)
+B
+B BATT
GND
P-CON
Lch+
UPC494GS
Lch-
SP OUT
Rch-
Rch+
P1
J3
1 AMP
510
CON
2
KAC-PS520/X520
S T
DTA124ES
2SC4137
2SA1037K
TC4052BF NJM4565M
NJM5532MD
PST9130NR
TC4W66F