Test Mode - Sharp CD-CH1500 Service Manual

JK501
AUX IN
L-CH R-CH
CHASSIS
GND
R550
39K
R549
39K
C540
C541
390P
390P
L501
L502
2.2µH
2.2µH
R547
R548
2.2K
2.2K
C573 C574
2.2/50 2.2/50
R591 R592
47K 47K
+B
R507
22K
C503
22/50
3
1
C597
C598
0.0027
2 2.6V
0.0027
SWITCHING
R503 R504
2.2K 2.2K
0.7V 0.7V
0V 0V 0V 0V
Q501 Q502
KTC3199 GR KTC3199 GR
SYSTEM MUTE
+B
-B
a b c d e f
P22 5 - H
TO MICOM SECTION
7
8
R544
R543
47K
47K
+B
24 23 22 21 20 19 18 17 16
1 2 3 4 5 6 7 8 9
C563
10/50
C564
0.1
R527
2.2K
R514
1.2K
R513
1.2K
g h i
P22 4 - H
TO MICOM SECTION
9
Figure 21 SCHEMATIC DIAGRAM (2/11)
P20 1 - F
TO TUNER SECTION
L M N K H E G F I J
+B
R536
47K
15 14 13
C550
22/50
C551
22/50
10 11 12
R535
47K
CD_L
FM SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
CD SIGNAL
10
– 21 –
CD-CH1500
MAIN PWB-A (2/3)
S-MUTE
+B
IC503
NJM4558M
MOTOR DRIVER
C537
0.1
-B
C536
10/50
C532
100P(CH)
R540
10K
2
0V 8.2V
4
C566
5
+
1
7
R542
22/50
–
6
3
1.5K 0V
0V
IC503
R541 +B
8
0V
1.5K
10V
2
–
1
3
+
R582
3
0V
1
22K
0V
R539
2
C533 10K
47P
Q507
C531
(CH)
DTC363 TS
100P(CH)
C535
0.1 +B
C530
10/50
-B
j k
P23 10 - H
TO MICOM SECTION
11
X
VSM
C2B_DO
W
C2B_CE
V
U C2B_DI
T C2B_CL
S D_GND
R S-MUTE
O
PB_MUTE
l m n
12