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AT
(X07-319X-XX) (A/4)
1
2
55.0V
CN1
Lch IN
17
(SW L)
3
A.GND
16
Rch IN
15
(SW R)
X13-A/3
-CN6
4
+12V
14
+12V
2/4
Sch
13
(MAIN R)
B
A.GND
12
Cch
11
(MAIN L)
B.CONT
10
SELFCHECK
9
PROTECTION
8
CS RELAY
7
ATT
6
MUTE
5
BEEP
4
F RELAY
3
5
X13-A/3
-CN5
2/4
C
X13-A/3
-WH2
2/4
E
HP L
2
HP R
1
X13-A/3
-WH1
6
2/4
F
CAUTION: For continued safety, replace safety critical components only with
manufacturer's recommended parts (refer to parts list).
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
7
resistance measurements shall be carried out (exposed parts are acceptably insu-
lated from the supply circuit) before the appliance is returned to the customer.
AU
-26.5V
-55.0V
+B
B
C55
C56
100u63
100u63
C9 220P
+
+
R80 220 1/4W
C59
C60
100u50
100u50
C42 100u63
+
+
+
C57 4700P
R121 33K
D22
D23
FLch
W79
R1 1.5K
R5
2.2K
R6
2.2K
W82
R2
1.5K
FRch
Cch
R15
1.5K
R19
2.2K
R20
2.2K
Sch
R16
1.5K
C13 56P
+12V
+B
B
B
+B
indicates safety critical
AV
+B
C67 33P
-51.8V
+B
R37 1M
C1
R21
4.7u50
+
2.2K
R9
2.2K
Q1
Q3
Q2
Q4
R10
2.2K
R22
C2
2.2K
4.7u50
+
Q1,2,5,6
Q3,4,7,8
R38 1M
-10dB
MUTING
ATT.
R49
C5
2.2K
4.7u50
+
R23
2.2K
Q5
Q7
Q6
Q8
R24
2.2k
R50
C6
2.2K
4.7u50
+
ON : 2.3V
OFF : -0.7V
+12V
The DC voltage is an actual reading measured with a high
impedance type voltmeter with no signal input. The mea-
surement value may vary depending on the measuring
instruments used or on the product.
AW
IC1
POWER IC
FLch/FRch
B
C18 3P
R48 56K
C17 3P
R47 56K
+B
R29 0.22 2W
R31 0.22 2W
10
R30 0.22 2W
9
R32 0.22 2W
8
R53
R54
2.7K
2.7K
C19
C20
0.01
0.01
0V
0V
0V
0V
Q9
Q10
54.3V
CURRENT
PROTECTION
Q25
PROTECTION
DRIVER
D19
54.7V
R36
Q25
3.3K
54.4V
D6
54.0V
0V
R33
0V
6.2K
Q26
Q27
Q26,27
DC
PROTECTION
12.2V
+12V
+B
B
B
+B
AX
53.3V
R88 220K
R87 220K
R83
4.7 1/4W
R57
L1 3uH
10K
R84
4.7 1/4W
R58
L2 3uH
10K
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