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QT-CD121
A
ROD ANTENA
F1
B.P.F.
1 2 3
D1
B
1N4148
IC1
FM
TRACKING
PIN
NO. VOLTAGE
fL
fH
1
0.9V
2
1.6V
6.8V
3
4
0V
(CH)
0V
5
L1
6
6.8V
FM ANT.
7
1.4V
8
6.2V
9
6.8V
C
220P
C11
D
R456
15K
R-CH
1
AUDIO GND
2
L-CH
3
R455
CD +7.4V
4
15K
DIGITAL GND
5
POWER GND
6
E
TAPE
RECORD/PLAYBACK
SW102-C
HEAD
R
F
L-CH
1
1
2
2
R-CH
3
3
4
4
ERASE HEAD
R
SW102-E
R
P
G
SW102-H
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.
1
R5
330K
C8
IC1
4P
(CH)
LA1186N
FM FRONT END
FM BAND
COVERAGE
RF AMP.
7
fH
fL
1
2
3
5
9
6
8
4
R2
33
C2
C5
0.001
33P
(CH)
R25
120
VC1
C4
C6
22P
15P
TC1
(RH)
R3
47
R9
R1
22K
10
T1
R7
C15
C10
FM IF
390
0.022
0.022
L3
C17
AM BAR ANT.
0.022
TC3
TC4
L4
AM OSC.
R458
R457
1.2K
1.2K
fH
fL
AM BAND
COVERAGE
R104
C105
R103
12K
0.0018
12K
R105
15K
330
R109
R102
330
120
R101
SW102-B
C109
R107
270P
R
P
P
1K
C107
C111
820P
330P
C112
C108
330P
820P
R
R108
P
P
1K
SW102-D
R110
C106
120
0.0018
R106
15K
2
3
Figure 12 SCHEMATIC DIAGRAM (3/4)
R6
820K
C14
0.022
C38
C37
0.022
C39
220/10
C22
0.022
0.0039
FM DET
R27
33K
T2
24
20
22
21
20
19
IC2
LA1805
FM/AF IF MPX.
AGC
C26
1
2
3
4
5
22/16
AM IF
C20
3
1
0.022
1
3
T3
2
CF2
2
CF1
C21
0.022
fH
AM
TRACKING
fL
C36
0.022
C115
R113
0.018(ML)
8.2K
R115
R117
3.9K
3.9K
C113
47/16
3
PRE AMP
1
NF1
8
OUT1
IC101
VCC
5
IN1
BA3311L
10
FILTER
REC./P.B.
EQUALIZER AMP.
ALC T
IN2
2
9
NF2
GND
OUT2
4
11
6
7
12
C110
270P
C118
C114
10/16
47/16
R116
3.9K
R120
R114
R118
C116
3.3K
8.2K
3.9K
0.018
(ML)
4
– 12 –
R11
1.2K
C24
470P
VR1
VCO
6.8K
C25
(B)
3.3/50
C27
R29
3.3/50
15K
18
17
16
15
14
13
12
6 7
8
9
10
11
C35
1/50
C34
C33
1/50
1/50
R14
R13
SW201-A
3.9K
3.9K
CD
AUTO
FM
AM
TAPE
SW201-B
R15
CD
2.2K
AUTO
FM
AM
R16
TAPE
2.2K
R121
1.5K
SW102-A
R123
3.3K
P
R
C121
0.01
D103
1N4148
C123
100/10
R125
680K
SW102-F
P
R
L301
R122
R124
1.5K
3.3K
C351
0.0022
(ML)
5
MPX VCO
CK 76kHz
C203
10/16
R203
10K
R233
4.7K
R201
100K
R202
100K
C204
10/16
SW102-G
P
R
R351
330
150
47K
R352
R35
C353
0.022
C352
(ML)
220/10
6
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