Sharp QT-CD121, Service Manual

Page: 13 / 32

QT-CD121
– 13 –
7 8 9 10 11 12
Figure 13 SCHEMATIC DIAGRAM (4/4)
11.83V
0V
8V
<3V>
<0.7V>
<0.1V>
1
1
5
5
HEADPHONES PWB-A4
2
3
1
8
4
5
7
6
R233
4.7K
R234
4.7K
C201
0.0056(ML)
C202
0.0056(ML)
R201
100K
R202
100K
IC201-2
KIA4558S
SURROUND
AMP.
IC201-1
KIA4558S
SURROUND
AMP.
SW102-G
C354 0.0056 (ML)
CNP201 CNS201
SW202-A
SW202
SURROUND
SW202-B
1N4148
D309
1N4148
D308
C302
0.022
C301
0.022
IC203
KIA7808P
VOLTAGE REGULATOR
VR201-A 20K (B)
VR201-B
20K(B)
C218 0.0027
R220
3.3K
C217 0.0027
R219
3.3K
C211 47/16
R212 10K
R211 10K
C208
4.7/50
C212
100/10
C209
4.7/50
C203
10/16
C204
10/16
C210
4.7/50
C352
220/10
Q351
S8050D
R354
10
47K
R353
C353
0.022
(ML)
R351
330
150
R352
C221
0.0015
C223
100/10
C229 100/10
C233
1000/10
FW202
C227
3300/25
C226 0.022
D201
1N4148
IC202 LA4597
POWER AMP.
C222
0.0015
C225
220/25
C224
100/10
R215
2.2K
R231
330
R207 12K
R208 12K
R216
2.2K
R217
22K
R218
22K
C213
0.039
(ML)
C214
0.039
(ML)
C230 100/10
SW201-D
C234
1000/10
C232
0.1
(ML)
C231
0.1
(ML)
SW201-C
SP502
SP501
M601
SW601
R230
2.7
C654 0.022
C651 0.022
D651
1N4004
D652
1N4004
C652 0.022
C653 0.022
D654
1N4004
D653
1N4004
T601
POWER TRANSFOMER
SO651
CNP602
CNS602
R222
1K
R221
1K
R227 120
C219
0.047
(ML)
C220
0.047
(ML)
C216
0.039(ML)
C215
0.039
(ML)
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
M
1
2
3
1
2
3
1
2
2
R228 120
J201
HEADPHONES
R213 22K
R214 22K
R205
4.7K
C205
0.0018
C206
0.0018
R204
10K
R203
10K
R209
22K
C207
4.7/50
R210
22K
R206
4.7K
+B
+B
+B
BATTERYS
DC12V["D"size(UM/SUM-1,
R20 or HP2)battery x 8]
+B
+B
+B
+B
R-CH
L-CH
SPEAKERS
–
–
+
+
VOLUME
(241-7)
MAIN
(241-6)
TAPE
MOTOR
TERMINAL PWB-A3
X-BASS
R
P
TAPE
AM
FM AUTO
CD
CD
FM AUTO
AM
TAPE
–
+
OUT
IN
VCO
kHz
AC INPUT
MAIN PWB-A1(1/2)
RECORD SIGNAL
PLAYBACK SIGNAL
CD SIGNAL
FM SIGNAL
AM SIGNAL
1
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC2
1.6V
1.6V
6V (6.3V)
0.2V (0.7V)
1.6V
0V
0V
0V
2.5V
2.5V
5.1V (6.6V)
0.8V (1V)
21
20
19
18
17
16
15
14
13
24
23
22
PIN
NO.
VOLTAGE
1.2V (0V)
1.9V (1.6V)
1V (1.3V)
1.7V
1.5V (1.7V)
1.5V (1.5V)
0.4V (0.4V)
6.1V (6.4V)
6.1V (6.4V)
1.6V
1.6V
1.6V
( ): AM
< >: Recording
[ ]: Play
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC101
<0V> [3.23V]
<0V> [0V]
<0.6V> [0.6V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<0V> [0V]
<7.43V> [7.43V]
<0V> [0V]
<7.37V> [7.37V]
<0.6V> [0.6V]
<3.3V> [3.3V]
9
8
7
6
5
4
3
2
1
13
12
11
10
PIN
NO. VOLTAGE
IC202
0.1V
0V
11.2V
0V
11.3V
0V
0.1V
12V
10.4V
5.8V
0V
5.8V
10.4V