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CM
CN
The DC voltage is an actual reading measured with a high impedance type volt-
meter with no signal input. The measurement value may vary depending on the
measuring instruments used or on the product.
(X11-3822-71) (A/7)
+17V
17V
IC42
2
, 27
3
,
26
4
,
25
6
,
23
SW1
SW2
SW3
SW4
STREO & Fch LARGE
2ch
LOW BOOST OFF
ANALOG INPUT
LOW BOOST ON
LOW BOOST OFF
DIGITAL
LOW BOOST ON
STEREO
TONE ON
STEREO EXCEPT
TONE OFF
6
SPEAKER B ON
SPEAKER B OFF
5
6ch
ANALOG INPUT
BASS PEAK LEVEL SWch
TEST
BASS PEAK
LEVEL NON SWch
TONE ON
NORMAL
STAND BY:0V
POWER ON:16.3V
CN1
+17V
+17V
1
IC3
(1/2)
C25
8
3
47u25
1
2
+
+
R27
100
REC OUT
17V
2
BUFF
3
R28
100
C26
6
4
4
47u25
7
5
5
5
+
IC3
4
6
6
+
STAND BY:0V
(2/2)
7
7
POWER ON:-16.5V
17V
17V
8
9
10
11
12
13
14
15
CO
CP
+B
B
C117
10u50
+
R125
470K
D2
R127
470K
C119
100P
C118
(
:SW ON)
10u50
8
,
21
10 19
,
11 18
,
+
SW6
SW7
SW8
12
(
)
+17V
-17V
GND
VIDEO2 REC Lch
VIDEO2 REC Rch
VIDEO1 REC Rch
VIDEO1 REC Lch
ROOM B SEL Lch
ROOM B SEL Rch
ROOM A SEL Rch
5
(
)
ROOM A SEL Lch
TAPE2 MONITOR Rch
TAPE2 MONITOR Lch
AUX Lch
AUX Rch
CQ
CR
CAUTION: For continued safety, replace safety critical components only with manufacturer's rec-
ommended parts (refer to parts list).
indicates safety critical components. For continued protec-
tion 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 accept-
ably insulated from the supply circuit) before the appliance is returned to the customer.
SIGNAL LINE
GND LINE
B LINE
B LINE
+17V
+17V
17V
17V
STAND BY:0V
POWER ON:-16.5V
IC21
IC51
Lch
C131
E-VOL.
(1/2)
2.2u50
4
3
LOUDNESS
1
+
2
R121
C115
R129
R401 100
220K
560P
8.2K
R122
C116
R128
220K
560P
8.2K
R402 100
6
C132
7
2.2u50
5
+
IC51
8
(2/2)
Rch
+17V
STAND BY:0V
STAND BY:0V
POWER ON:-16.5V
C171
POWER ON:16.3V
10u50
17V
+
IC52
SLch
C137
(1/2)
2.2u50
4
3
1
+
2
R173
470K
R405 100
-16.4V
16.4V
R175
R406 100
470K
IC23
C163 100P
E-VOL.
6
C138
7
2.2u50
5
+
IC52
8
(2/2)
SRch
C172
10u50
+17V
+
STAND BY:0V
STAND BY:0V
POWER ON:16.3V
POWER ON:-16.5V
C211
10u50
17V
+
IC53
Cch
C143
(1/2)
2.2u50
4
3
1
+
2
R223
470K
R409 100
-16.4V
16.4V
IC25
R225
R410 10K
470K
E-VOL.
C213 100P
6
C144
7
2.2u50
5
+
IC53
8
(2/2)
SWch
C212
10u50
+17V
+
STAND BY:0V
POWER ON:16.3V
CS
CT
CN4
1
2
+17V
17V
17V
STAND BY:0V
POWER ON:-16.5V
R115
2.2K
IC22
C135
R109
C103
(1/2)
47u35
2.2K
2.2u50
4
C111
3
1
4.7u100
+
+
2
+
R105 13K
ON:0.7V
OFF:-15.8V
C109
R131
R113
22P
100
4.7K
Q1
Q3
-20dB
AMP
MUTE
ATT
C110
R132
Q2
R114
Q4
22P
100
4.7K
ON:0.7V
R106 13K
OFF:-15.8V
C112
R116
6
C136
C104
7
4.7u100
2.2K
47u35
R110
2.2u50
5
+
+
+
2.2K
8
IC22
(2/2)
STAND BY:0V
POWER ON:16.3V
+17V
+17V
17V
17V
R165
STAND BY:0V
2.2K
IC24
POWER ON:-16.5V
C141
R159
C153
(1/2)
47u35
2.2K
2.2u50
3
4
C159
4.7u50
1
+
+
2
+
R155 13K
ON:0.7V
OFF:-15.8V
C157
R177
R163
22P
100
4.7K
Q5
Q7
-20dB
AMP
MUTE
ATT
C158
R178
Q6
R164
Q8
22P
100
4.7K
R156 13K
ON:0.7V
OFF:-15.8V
6
C160
R166
C142
C154
4.7u50
2.2K
7
47u35
R160
2.2u50
5
+
+
+
2.2K
8
IC24
STAND BY:0V
(2/2)
POWER ON:16.3V
+17V
+17V
17V
17V
R215
STAND BY:0V
POWER ON:-16.5V
2.2K
IC26
C147
R209
C203
(1/2)
47u35
2.2K
2.2u50
3
4
C209
4.7u50
1
+
+
2
+
R205 13K
ON:0.7V
OFF:-15.8V
C207
R227
R213
22P
100
4.7K
Q9
Q11
-20dB
AMP
MUTE
ATT
C208 R228
R214
Q10
Q12
22P
100
4.7K
ON:0.7V
R206 18K
OFF:-15.8V
C210
R216
6
C148
C204
7
4.7u50
2.2K
47u35
R210
2.2u50
5
+
+
+
2.2K
8
IC26
STAND BY:0V
(2/2)
POWER ON:16.3V
+17V
+17V
3
D14
4
1
2
CU
CV
P
3
4
5
6
7
8
9
10
11
12 13 14
15
16 17
STAND
BY:0V
POWER
ON:16.3V
R135 2.2K
ON:0.7V
OFF:-15.8V
R117
1K
R118
1K
ON:0.7V
OFF:-15.8V
R136 2.2K
R137 2.2K
R167
1K
R168
1K
R138 2.2K
C371
0.01
R139 2.2K
ON:0.7V
OFF:-15.8V
R217
1K
R218
1K
ON:0.7V
OFF:-15.8V
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