Service manual

QT-CD121
– 12 –
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B
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Figure 12 SCHEMATIC DIAGRAM (3/4)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.
R233
4.7K
R234
4.7K
C201
0.0056(ML)
C202
0.0056(ML)
R20
1
100
K
R20
2
100
K
R457
1.2K
R458
1.2K
CNP101
CNS101
SW102-H
SW102-C
SW102-B
SW102-E
SW102-D
SW102-A
SW102-G
SW102-F
C354
0 0056
VC3
L3
AM BAR ANT.
TC3
L4
AM OSC.
T1
TC1
D1
1N4148
F1
B.P.F.
C2
0.001
L1
FM ANT.
C9
0.0047
C16
0.0047
R1
10
R7
390
R3
47
R9
22K
IC1
LA1186N
FM FRONT END
RF AMP.
C5
33P
(CH)
R2
33
C6
15P
(RH)
VC2
TC2
C8
4P
(CH)
R5
330K
C14
0.022
R6
820K
VC1
L2
C4
22P
(CH)
C37
220/10
C39
0.022
R8
3.9K
T2
R27
33K
C22
0.0039
C23 0.01
C38
0.022
C24
470P
C25
3.3/50
C27
3.3/50
R11
1.2K
VR1
6.8K
(B)
R29
15K
C28
0.0015
(Styrol)
R25
120
CF1
C29
10/16
R104
12K
R105
15K
C109
270P
C112
330P
C111
330P
R107
1K
C108
820P
C107
820P
R108
1K
C110
270P
C114
47/16
R110
120
R455
15K
R456
15K
330
R101
330
R102
C35
1/50
C20
3
10/1
6
C20
4
10/1
6
SW201-B
CD
R103
12K
C352
220/10
47
K
R3
5
C353
0.022
(ML)
R351
330
150
R352
L301
C351
0.0022
(ML)
C105
0.0018
R106
15K
C106
0.0018
R123
3.3K
R124
3.3K
220P
C11
C10
0.022
C15
0.022
IC2
LA1805
VC4
TC4
C17
0.022
C21
0.022
C20
0.022
T3
CF2
C26
22/16
SW201-A
CD
R16
2.2K
R13
3.9K
R14
3.9K
R15
2.2K
C33
1/50
C34
1/50
R38
1.8K
0.022
C32
C31
0.022
R17
68
C36
0.022
R121
1.5K
D103
1N4148
R122
1.5K
C123
100/10
C121
0.01
C122 0.01
D101
1N4148
D102 1N4148
R120
3.3K
R119
3.3K
C119
2.2/50
C120
47/16
R125
680K
R118
3.9K
C115
0.018(ML)
C117
10/16
R117
3.9K
R115
3.9K
R113
8.2K
C118
10/16
R116
3.9K
R114
8.2K
IC101
BA3311L
REC./P.B.
EQUALIZER AMP.
C113
47/16
C116
0.018
(ML)
R109
120
4
4
33
2
2
1
1
12
123
1
23 4
5
6
7
89
123 4
5
6
7
8
9
10
11
131415161718192021222024
2
5
8
9
10
11

R20
3
10K
TAPE
RECORD/PLAYBACK
HEAD
NC
2
3
1
3
2
1
VCO
OSC
MIX
AUTO
AUTO
FM BAND
COVERAGE
fH
fL
AM
TRACKING
fL
fH
AM BAND
COVERAGE
fH
fL
fHfL
FM
TRACKING
P
P
R
FM DET
FM OSC.
FM IF
ALC T
FILTER
VCC
GND
NF1
NF2
IN2
IN1
OUT2
OUT1
AM
OSC
STB
AM RF
+B
FM
DET
AM
OUT
AM IN
MPX
IN
MO/ST
VCO
AM/FM
GND
AM IF
AGC
AM MIX
FM IF IN
R-CH L-CH
R
P
R
R
P
TAPE
AM
AM
FM
FM
POWER GND
DIGITAL GND
CD +7.4V
L-CH
AUDIO GND
R-CH
AM IF
MPX VCO
CK 76kHz
P
P
P
P
R
R
R
R
TAPE
L-CH
R-CH
ERASE HEAD
ROD ANTENA
PRE AMP
DET
OUT
P11 7 - H
TO CD SERVO/
DISPLAY SECTION
6
5
4
3
2
1
1
3
4
6
7
12
FM/AF IF MPX.
9
8
7
6
5
4
3
2
1
PIN
NO.
VOLTAGE
IC1
0.9V
1.6V
6.8V
0V
0V
6.8V
1.4V
6.2V
6.8V