Sharp QT-CD121 Service Manual page 13

SW202
VCO
SURROUND
kHz
IC201-1
KIA4558S
SURROUND
AMP.
R231
330
C203
10/16 8
3
2
R203
R207 12K
10K
R205
R209
R233
4.7K
22K
4.7K
R201
100K
C207
C205
4.7/50
0.0018
C208
C206
4.7/50
R202
0.0018
100K
R210
R206
22K
R204
4.7K
10K
R208 12K
C204
6
10/16
5
4
IC201-2
KIA4558S
SURROUND
AMP.
SW102-G
P
R
R351
330
Q351
S8050D
<3V>
150 47K
R352 R353 <0.7V>
C353
<0.1V>
0.022
C352
R354
(ML)
220/10
10
7
IC2
PIN PIN
NO. VOLTAGE VOLTAGE
NO.
1 1.6V 1.2V (0V)
13
1.6V 1.9V (1.6V)
2 14
3 6V (6.3V) 15 1V (1.3V)
4 0.2V (0.7V) 16 1.7V
5 1.6V 17 1.5V (1.7V)
6 0V 18 1.5V (1.5V)
7 0V 19 0.4V (0.4V)
8 0V 20 6.1V (6.4V)
9 2.5V 21 6.1V (6.4V)
10 2.5V 22 1.6V
11 5.1V (6.6V) 23 1.6V
12 0.8V (1V) 24 1.6V
( ): AM
X-BASS
C213
C209
0.039
R215
4.7/50
(ML)
2.2K
1
R217
22K
C215
0.039
(ML)
SW202-A
R219
3.3K
R220
3.3K
SW202-B
C212
100/10
R218
22K
C210
4.7/50
7
R216
C214
2.2K
0.039
(ML)
+B
CD
FM AUTO
AM
TAPE IC203
KIA7808P
SW201-C
VOLTAGE REGULATOR
11.83V
3 IN 1
OUT
8V
C302
C301
2
0V
0.022 0.022
IC101
PIN
VOLTAGE
NO.
<0V> [3.23V]
1
2 <0V> [0V]
3 <0.6V> [0.6V]
4 <0V> [0V]
<0V> [0V]
5
6 <0V> [0V]
7 <0V> [0V]
8 <7.43V> [7.43V]
9 <0V> [0V]
10 <7.37V> [7.37V]
11 <0.6V> [0.6V]
12 <3.3V> [3.3V]
< >: Recording
[ ]: Play
8 9
Figure 13 SCHEMATIC DIAGRAM (4/4)
MAIN PWB-A1(1/2)
AM SIGNAL
FM SIGNAL
CD SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL
C219
0.047
R221
(ML)
1K
2
+
C221
–
0.0015
1
C223
100/10
4
C224
VOLUME
100/10
7
C225
220/25
3
–
+
6
R222
C220
5
1K
0.047 C222
(ML) 0.0015
D201
1N4148
+B
TERMINAL PWB-A3
SW201-D
+B
CD
1 1
FM AUTO
2 2
AM
TAPE
+B
DC12V["D"size(UM/SUM-1,
R230
2.7
+B
+B
10
– 13 –
QT-CD121
HEADPHONES PWB-A4
R227 120
R228 120
5
1
FW202
5
1
12
C233
1000/10
C231
13
0.1
(ML)
1
11
2
3
C232
0.1
9
(ML)
10
C234
8
1000/10
C227
3300/25
T601
POWER TRANSFOMER
+B
BATTERYS
R20 or HP2)battery x 8]
SW601
(241-7)
MAIN
+ M601
M (241-6)
TAPE
MOTOR
–
11
SPEAKERS
SP501
1
2
3
SP502
IC202
PIN
NO. VOLTAGE
1 0.1V
2 0V
3 11.2V
4 0V
5 11.3V
6 0V
0.1V
7
8 12V
9 10.4V
10 5.8V
0V
11
12 5.8V
13 10.4V
SO651
AC INPUT
12