Over Heat Protection:
It shuts down the unit
when the temperature on
the heatsink is over 90C
degrees.
It also shuts down the unit
when the unit enters the
standby mode.
ISC Circuit:
It switch the power
supply to lower voltage
when the load
impedance is low, or the
temperature on the
heatsink is over 80C
degree
C219
22n 10% 63V
RCA35D
MAIN-IN R-CH
R156
470K
R11
470
C11
10u/16V
R15
22K
R14
100
C15
220uF/63V
C16
220uF/63V
Q110
KSA1220
Q111
KSC2690
R124
3.
3/
0.
5W
F
P
R125 3.3/
0.
5W
R128
330/0.5W FP
R129
330/0.5W
C110
47u/25V
C111
47u/25V
R126
3K3/2W FP
R127
3K3/2W FP
R130
82/1W FS
R131
82/1W FS
R142
22,MF,5%
R143
22,MF,5%
R136
10
R137
10
Q112
KSC2690
Q
115 2S
C5200
Q114
2SA1943
Q113
KSA1220
R144
0.068/3W CE
R145
0.068/3W CE
R139
412
L11
0.5uH
R150
1/1W FP
R151
10/1W FS
C118
0.1u 10% 63V
C115
0.1u
C114
0.1u
R21
470
R12
220K
R22
220K
C112
470p,100V,20%
C113
470p,100V,20%
R147
1K
Q11
C1815
Q12/1
A1015
R152
22K
R12/1
6K8
R148
15K
C120
22n 10%
D17
1N4148
RCA35C
MAIN-IN L-CH
R146
1K8,1W,1%,MF
Q116
KSC2690
R138
430
Q47
A1015
Q45
A1015
Q46
C1815
R417
100
R419
100
R418
100
R416
100
C415
10u/25V
C416
10u/25V
R422
1.3K
R423
1.3K
R424
1.3K
R425
1.3K
R420
36K
R421
36K
D411
20V
D410
20V
1
2
3
S41A
4
5
6
S41B
ON
OFF
TP4
TP3
FS
FS
POWER AMP CIR. R
+46V
-46V
+46V
-46V
D11
4.7V
D12
4.7V
R108
39,MF,5%
R107
39,MF,5%
Q48
C1815
C17
0.1uF/63V
C12/1
47uF/25V
VR12
200
C119
22n 10% 63V
C21
10u/16V
R25
22K
R24
100
C25
220uF/63V
C26
220uF/63V
Q210
KSA1220
Q
211
K
S
C
2690
R224
3.
3/
0.
5W
F
P
R225
3.
3/
0.
5W
R228
330/
0.
5W
F
P
R229
330/
0.
5W
C210
47u/25V
C211
47u/25V
R226
3K3/2W
R227
3K3/2W
R230
82/1W FS
R231
82/1W FS
R242
22,MF,5%
R243
22,MF,5%
R236
10
R237
10
Q212
KSC2690
Q
215
2S
C5200
Q214
2SA1943
Q213
KSA1220
R244
0.068/3W CE
R245
0.068/3W CE
R239
412
L21
0.5uH
R250
1/1W FP
R251
10/1W FS
C218
0.1u 10% 63v
C215
0.1u
C214
0.1u 10% 63V
TP1
C212
470p,100V,20%
C213
470p,100V,20%
R247
1K
R248
15K
R252
22K
Q21
C1815
C220
22n 10%
D27
1N4148
R246
1K8,1W,1%,MF
Q216
KSC2690
R238
430
TP2
FP
FS
FS
63V
+46V
-46V
D21
4.7V
D22
4.7V
R207
39,MF,5%
R208
39,MF,5%
C27
0.1uF/63V
R256
470K
R257
470K
C222
1uF,63V,5%
C221
1uF,63V,5%
R258
2.2k
-18V
+18V
VR22
200
POWER AMP CIR. L
SUPPLY CIR.
R12/2
22K
O/P RELAY
L OUT
R OUT
D412
1N4148
BINDING POSTS
R446
56K
R445
56K
C422
330u/16V
C421
4u7/50V
C432
0.22u
R443
150 1/2W FS
R441
4.7K
R442
56K
C420
100u/16V
PROTECTION CIR.
0V
0V
+3.25V
+2.16V
0V
0V
+2.0V
+18V
+46V
R478
100K
1
2
3
IC43A
TL082D
R480
3K9
R482
4K7
R479
100K
C428
10u/25V
C425
10u/25V
R470
10K
R471
10K
D418
1N4148
D417
1N4148
R477
47K
R483
270K
R473
43K
R472
470K
C426
10u/25V
C429
10u/25V
R488
18K
R487
18K
D420
1N4148
D419
1N4148
R474 1K
C430
10u/25V
R476
1K
C431
10u/25V
R490
100K
R491
100K
4
5
6
7
8
IC43B
TL082D
+18V
-18V
1
2
3
4
5
6
7
CB47
7PIN
-37V
+37V
1
2
3
4
5
CB45
R453
220/2W FP
R452
220/2W FP
R438
22K
R439
T0=90 degree C
Q412
C1815
POSISTOR
+18V
1
2
3
4
5
6
7
8
IC44
UPC1237HA
1
2
3
4
5
6
RL12/1
F1AA012V
1
2
3
4
SPKOUT
D42
1N4148
D43
1N4148
R437
47K
STANDBY
R440
2K2
+18V
ISC CIRCUIT
+12V
Protection
Soft Cliping
+5V
+18V
-18V
+5V
+18V
-18V
+12V
Standby
STANDBY
R45
33/0.5W FS
R41
680
R43
680
*
R47
680
C43
220u/63V
C413
220u/35V
Q41
2SC2690
C45
22p
R49
680
R411
680
R413
680
D49
18V
C47
47u/25V
C49 47u/
25V
R414
2K2
R46
33 / 0.5W FS
R42
680
R44
680
R48
680
C44
220u/63V
C414
220u/35V
Q43
C1815
C46
22p
R410
680
C48
10u/25V
C410 47u/
25V
R412
2K
Q42
2SA1220
Q44
A1015
C411
0.1uF
C412
0.1u
R428
2K2
R429
5K1
MF
MF
+18V
-18V
R401
4K7
D403
1N4148
STANDBY
C443
0.1uF
C41
0.1uF
I-V
AC DET.
ISC TRIG
-46V
-46V
Q421
C1815
R469
10K
R468
22K
R467
T0=80 degree C
D428
1N4148
+18V
SOFT CLIPING CIR.
7
6
5
4
8
IC42B
TL082D
-46V
+46V
P3-R
P4-R
P5-GND
R493
180k
VR3
10K
+18V
R133
3K3/2W
R132
3K3/2W FP
R232
3K3/2W FP
R233
3K3/2W FP
R260
1K,5%
R261
1K,5%
-46V
+46V
P1-L
P2-L
R157
470K
C122
1uF,63V,5%
C121
1uF,63V,5%
R158
2.2k
-18V
+18V
1
2
3
4
8
IC41A
TL082D
R160
1K,5%
R161
1K,5%
D430
DB104
C444
4700uF/16V
C445
100uF
3
1
2
IC45
AMS1117-5.0
+5V
R427
22/1W FP
Q413
KSC2690
Q414
C1815
+37V
+12V
C419
10uF
Q422
D667
Q423
C2240
R494
12
12V TRIG
C446
10uF
R495
510
1
2
3
4
5
6
7
8
CZ11
CON8
1
2
3
4
5
6
7
8
CZ21
CON8
+18V
+18V
-18V
-18V
D101
1N4148
D102
1N4148
D103
1N4148
C123
0.1uF
R162
1K
R163
1K
R164
10K
R165
10K
R167
1K
R166
5K6
R168
1K
D201
1N4148
D202
1N4148
D203
1N4148
C223
0.1uF
R262
1K
R263
1K
R264
10K
R265
10K
R267
1K
R266
5K6
R268
1K
Q217
2SA970
Q117
2SA970
Q118
2SC2240
Q218
2SC2240
IC11
AZ431
IC21
AZ431
JK41
1
2
3
4
5
CZ45
PHONES SOCKET
C325BEE HEADPHONE BOARD Vm1.2
N8C320D03
R455
100,2W
R454
100,2W
R169
1M2
R269
1M2
C227
N.I.
C127
N.I.
TP10
TP11
Q2
2
A
1312-
G
R
Q2
3
C3324-
G
R
C22
1nF
R29
39k,MF,5%
R211
100,MF,5%
R212
100,
M
F,
5%
R210
39k,MF,5%
C24
10u/35V
C23
10u/35V
Q24
C3324-GR
Q25
A1312-GR
R215
15
R216
15
R203 82,
M
F,
5%
Q26
A1015
Q27
C1815
R219
82,MF,5%
R220
82,MF,5%
C28
39p
C29
39p
L22 100uF
R259 100,5%
1
2
3
4
5
6
7
8
CZ21
CON9
Q
202
A
1312-
G
R
R223
47K
R249
68,1/4 1% MF
Q2
9
2S
D667
Q
201
C3324-
G
R
Q2
8
2S
B
647
D23
1N4148
D25
1N4148
D24
1N4148
D26
1N4148
R204 220k
,M
F,
5%
R202
220k
,M
F,
5%
-18V
+18V
R254
10
R255
10
Q203
C3324-GR
R222
100K
,M
F,
5%
C203
22uF/16V
R201
39K,MF,5%
R221
100K,MF
R206 82,
M
F,
5%
R205
39k,MF,5%
Q
204
A
1312-
G
R
C204
22uF/16V
R269 330
C224 1nF
Q1
2
A
1312-
G
R
Q1
3
C3324-
G
R
C12
1nF
R19
39k,MF,5%
R111
100,MF,5%
R112
100,
M
F,
5%
R110
39k,MF,5%
C14
10u/35V
C13
10u/35V
Q14
C3324-GR
Q15
A1312-GR
R115
15
R116
15
R103 82,
M
F,
5%
Q16
A1015
Q17
C1815
R119
82,MF,5%
R120
82,MF,5%
C18
39p
C19
39p
L12 100uF
R159 100,5%
1
2
3
4
5
6
7
8
CZ11
CON9
Q
102
A
1312-
G
R
R123
47K
R149
68,1/4 1% MF
Q1
9
2S
D667
Q
101
C3324-
G
R
Q1
8
2S
B
647
D13
1N4148
D15
1N4148
D14
1N4148
D16
1N4148
R104 220k
,M
F,
5%
R102
220k
,M
F,
5%
-18V
+18V
R154
10
R155
10
Q103
C3324-GR
R122
100K
,M
F,
5%
C103
22uF/16V
R101
39K,MF,5%
R121
100K,MF
R106 82,
M
F,
5%
R105
39k,MF,5%
Q
104
A
1312-
G
R
C104
22uF/16V
R169
330
C124 1nF
AMP-SMD MODULE L CHANNEL Vm1.4
D431
3.6V
PCB-10:HEADPHONE Vm1.0
SCHEMATICS DIAGRAM(1/4)
AMP CIRCUIT Vm1.4
PCB-1:MAIN BAORD Vm2.0
PCB-4:AMP-SMD-L Vm1.0
AMP-SMD MODULE
R
CHANNEL Vm1.4
PCB-5:AMP-SMD-R Vm1.0
17
P/N: 01-32520-02
P/N: 01-32520-01
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