T
K
M
O
Q
S
L
N
P
R
KAC-PS520/X520
Q60
Q62
Q63
Q65
Q50
Q51
Q52
Q70
Q45
Q53
Q80
Q78
Q76
Q79
Q77
Q75
Q43
Q47
S3
Q46
Q49
Q48
Q69
Q68
Q67
Q64
Q61
Q72
Q71
Q73
Q74
Q66
D56
P1
D45
D55
Q44
S2
S4
D67
D54
D48
D47
D66
D57
D59
D58
D60
D53
D44
D43
D49
D50
D46
D65
D52
IC6(2/2)
IC7(2/2)
IC5(2/2)
INFRASONIC
FILTER
INVERTER
INPUT SIDE
VOLTAGE-DOWN
MOMENTARY
DETECTOR
SWITCHING
POWER STAGE
SWITCHING
DRIVER
SWITCHING
REGULATOR
CN3
J2
CN4
15 (FAN)
SP OUT
FAN
SWITCHING
INPUT SIDE
VOLTAGE-DOWN
OVER-
DETECTOR
SWITCHING
5V
5V
AVR
14.4V
SWITCHING
P. CON
DETECTOR
J3
AMP
CON
D51
COMMUNICATION
DETECTOR
u-COM
SWITCHING
LED
SP. DC
DETECTOR
OFFSET
MUTE
MUTE
RESET
IC
Q84
Q86
Q82
D64
D63
Q85
AVR
D62
D61
Q81
Q83
CN2
CN1
(F07-1751-05)
L6
X1
4.19MHz
22K
R53
22K
R51
22K
R255
10u16
C60
22K
R262
10K
R260
10K
R256
47P
C140
13K
R68
13K
R67
200K
R65
200K
R66
0.22
C54
0.22
C52
4.7K
R62
2.2
C50
4.7K
R61
2.2
C49
0.22
C51
0.22
C53
R63 13K
2.2
C55
5.1K
R258
1/2W
10
R179
1/2W
10
R267
0.047
C91
0.047
C92
10 1/2W
R268
10 1/2W
R180
33
R203
4.7K
R207
1.5K
R201
100u16
C109
10u16
C107
1.5K
R202
4.7K
R208
33
R204
10 1/2W
R223
1800P
C1
10
3900u16
C1
12
+
3900u16
C
111
120
R229
120
R228
120
R231
120
R230
20K
R232
10
R233
10
R234
10K
R224
4.7K
R225
10u16
C129
+
22K
R226
22K
R227
1u50
C130
47u25
C131
+
4.7K
R236
0.1
C143
13K
R238
10K
R237
C104
1/2W
18
R272
2.2K
R273
10K
R274
1500P
C118
1/2W
10
R214
1/2W
10
R213
1500P
C117
680u63
C120
680u63
C119
1/2W
10
R210
1500P
C114
1500P
C113
1/2W
10
R209
4700u56
C116
4700u56
C115
13K
R64
2.2
C56
R165
330
R166
22K
R167
33u10
C139
R168 270
1K
R151
47
R152
10K
R154
1u50
C99
1K
R153
5.6K
R155
5.6K
R156
20K
R159
100u10
C97
0.01
C98
100K
R162
100u6.3
C96
R171 5.6K
3.9K
R173
47K
R172
100K
R184
100K
R185
0.01
C145
0.01
C144
0.01
C148
10K
R157
10K
R158
R176
R177
R178
4.7K
R183
4.7K
R182
4.7K
R181
R186 47K
1u50
C42
R188
R189 5.6K
R190
0.01
0.01
R191 2.2K
R192
R193 2.2K
R196 100K
R197 100K
R194
R195 100K
2.2K
2.2K
2.2K
47K
R247
0.01
C134
22K
R246
22K
R245
47K
R244
3.3K
R242
3.3K
R240
750
R243
10u16
C133
+
0.01
C132
3.3K
R241
510
R271
3.3K
R248
0.022
C135
27K
R250
100K
R251
100K
R253
R175 100K
1K
R174
C95 0.1
0.1
C106
100u10
C105
L5
L4
L1
L2
L3
1
2
3
4
5
6
7
8
NI IN1
I IN1
FBACK
DTCONOUT
CT
RT
GND
C1
16
15
14
13
12
11
10
9
NI IN2
I IN2
REFOUT
CON
VCC
C2
E2
E1
5
4
VCC
OUT
1
2
3
NC
SUB
GND
ADIN 2
NC
20
36
4
GREEN
BLUE
AB CURRENT
AB VOLTAGE
D CURRENT
V DOWN
D VOLTAGE
NC
8
11
10
9
7
6
5
XIN
13
RED
12
RESET
TEST
15
14
18
VSS
XOUT
17
16
ADIN 1
V
AREF
19
FAN
NC
5V SW
3
2
1
T
ACT
SW
MUTE 2
MUTE 1
43
NC
44
41
42
ST
AND-BY
38
NC
VDD
39
40
NC
37
30
NC
ADIN 4
ADIN 3
22
21
BASS 12dB
BASS OFF
BASS REMO
D POWER
NC
NC
POWER
26
23
24
25
27
28
29
BASS CON B
OFFSET CON
BASS CON A
COM HU
NC
34
35
31
32
33
2
3
1
2
3
1
3
2
1
+
R205 100
R206 100
1.1K
R199
C108 1000P
10K
R198
Q75-80
Q71-74
16K
R200
1
2
F2(30A)
BATT
P-CON
Rch+
Rch-
Lch-
Lch+
GND
R235
47K
0.1
R239 22K
Q62-64
Q68,69
2
1
R254 100
R249 4.7K
Q70
10K
R252
0.01
R187 100K
R169 560
R170 220
8.2K
R160
R161
47K
Q50-52
10K
10K
10K
100K
Q48,49
Q3
Q4
22K
15K
47K
47K
+
+
+
+
R222
R220
430
R216
27
10
R218
10K
R219
R221
10u16
10u16
C128
C127
47u25
C126
C125
47u25
10
430
C124
47u25
C122
47u25
C123
47u25
C121
47u25
R215
27
Q81-86
R217
10K
+
+
+
+
+
+
+
+
+
1
3
32
33
34
1
3
2
1
3
4
3
1
2
4
4
3
2
4
3
2
+
Q45
Q47
Q43
6
6
33K
R211
33K
R212
+14.4V
+14.4V
+14.4V
SW5V
SW5V
SW5V
SW5V
SW5V
SW5V
SW5V
SW5V
SW5V
SW5V
+5V
+5V
+
+
+5V
+
+
+
B
B
+B
+B
B
+B
+5V
+B
B
+B
B
B
+B
+B
+
+5V
+
+B
+B
+B
+B
+B
+B
+B
+B
B
+5V
+B
B
+B
B
B
+B
+B
B
+B
+B
+B
B
+B
+5V
B
+B
+B
+
+B
B
+
+B
B
+B
+B
B
+B
+B
+B
+B
SW5V
Q43,46,47
TH3
TH2
TH1
C103
C102
C101
(F52-0015-05)
F1(30A)
(F52-0015-05)
+B
22K
22K
0V
3.3V
0V
12V
5.0V
0.5V
4.0V
13.6V
5.0V
13.6V
5.0V
5V
0V
0V
5V
5.0V
5V
0V
0V
5V
0V
5V
5V
0V
5V
0V
0V
5V
5.0V
0V
5V
5V
0V
0V
5V
5V
0V
0V
5V
5.0V
0V
5V
0V
5V
-47.0V
47.0V
-46.7V
46.7V
-18.8V
18.8V
5.0V
15.4V
-15.4V
IC12
IC10
IC11
(X09- ) (B/2)
KAC-PS520/X520 (E/K,M,J)
CAUTION:
For continued safety, replace safety critical com-
ponents only with manufacturer's recommended parts (refer
to parts list).
indicates safety critical components. For
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
carried out (exposed parts are acceptably insulated from the
supply circuit) before the appliance is returned to the cus-
tomer.
2SA1123
2SA1534A
2SA733(A)
2SA965
2SA992
2SC1845
2SC2235
2SC2631
2SC3940A
2SC945(A)
DTA124ES
DTA124EK
DTC124EK
2SC2412K
2SC4137
2SB1548
2SA1037K
TC4052BF
NJM4565M
NJM5532MD
UPC494GS
PST9130NR
TC4W66F
