Service manual

QT-CD700W
16
Figure 15 SCHEMATIC DIAGRAM (1/4)
FM ANTENNA
D301
1N4148
D302
1N4148
C328
33P
C316
130P
R11
4.7
L301
2T5/5MM
L303
3T5/4.5MM
C302
25P
C301
25P
C324
203
VC1A
VC1C
IC1 TA2111N
VOLTAGE(V) VOLTAGE(V)
(0.8)0V
(0.48V)1.37V
(1.25V)1.24V
(1.25V)1.26V
(4.28V)4.52V
(3.47V)4.52V
(0.7V)0.7V
(0.9V)1.1V
(0.19V)1.36V
(4.28V)4.53V
(4.3V)4.52V
(4.28V)4.52V
(4.28V)4.52V
(4.28V)4.52V
0
U1
1 2 3
12
11
10
9 8 7 6 5 4
24 23 22 13
FMST-
FMST+
14 15 16 17 18 19 20 21
88-108
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
pin
no
pin
no
0
0
(3.5V)4.49V
(0.6V)0.5V
(3.7V)4.5V
(3.4V)3.84V
(4.17V)4.52V
(2.75V)3V
(3.5V)3.95V
VC1B
VC1D
C325
33P
CF2
455K
CF3
10.7M
R12
220
R304
330
R311
330
C2
100U
C3
203
R3
10
R310
100
R77
10K
R78
10K
R506
10K
Q501
9014
R507
10K
D3
1N4148
D5
1N4148
R505
100K
Q502
9014
C4
470U
C303
1U
C305
0.1U
Q2
9014
6.12V
0.21V
0.23V
0V
0V
0V0V
5.43V
C307
1u
R312
4K7
R308
10K
R309
10K
C327
203
10.7M
CF303
C306
1u
R325
47k
T303
C322
4.7u
R302
180K
C323
104
C102
100U
C121
47U
R112
2K2
R110
47K
MIC
L
L
L-CH
R-CH
TAPE
R
RP-HEAD
TAPE MOTOR
TAPE L EAF
SWITCH
CN103
CN15 CN15A
CN7B
2
1
2
2
1
1
3
CN7A
SW3
CN14A CN14
1
2
1
2
CN103A
P
1
12
CN503B
CN503A
REC-SYN
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
2
3
4
5
6
7
8
9
P
R
R
P
R
P
R
P
4.75V
0.1V
0.68V
0.1V
0.1V
0.68V
0V
0V
0.6V
R
P
R
R109
2K2
R108
1K
R129
15K
R104
560
R105
560
C109
222(M)
C129
182M
C130
1u
R122
47
R121
120K
C128
100u
C106 100u
C105 203
R17 100K
C122
22U
C126
47u
C123
333(M)
R125
5k6
R141
2K2
C125
1u
C124
1u
C124
120K
C142
200p
R117
5k6
IC101
REC/P.B.
EQUALISER AMP
BA3308
C141 200p
R107 3K3
R314 300
C320 104
C100 562 C200 562
R306 3K9
R307 3K9
CC5 103M
C309 103M
C312 103M
C317 203
D1 4V3
C318 100u
AM
FM
ST
SW4
C304 4P
C321 203
R315 0.1U
C132
1u
C127
182M
C101
203
C110
222(M)
C133
182(M)
R113
15K
R128
470K
R126
47
R101
100
R118
100
R127
10K
R20 22
R111
10K
C103
203
M501
SW502
M
Q101
9014
Q102
9014
C136
100u/25V
C143
180P
BIAS COIL
AC BIAS
BEAT CUT SWITCH
E-HEAD
Q103 8050D
RECORDING
BIAS OSCILATOR
T101
PL1004
R119
10
C135
562(M)
R120
47K
C134
223(M)
C131
47u
C120
1u
D102
1N4148
C108
333(M)
IC101
BA3308
R103 82K
R140 2K2
R102 82K
D103
1N4148
FM BAND BASS
FILTER
AM BAR
ANTENNA
FM ANT
T301
FM IF
RADIO
FM DETECTION
TAPE
CD
RADIO
TAPE
CD
SW1-C
SW1-D
RADIO-LCH
CD-LCH
CD-RCH
RADIO-RCH
CD
FUNCTION
SELECTOR
FUNCTION
SELECTOR
AM IF
AM IF
FM OSC
AM OSC
IC1
TA2111
IC1
FM/AM IF MPX.
TA2111N
R
R/P PWB-A2
VOLTAGE(V)
PIN
IC101 BA3308
0
1
1.89
0.03
1.94
0.01
7.06
2.01 1.91
0.03
2
3
4
5
6
7
89
A
B
C
D
E
F
G
H
654321
NOTES ON SCHEMATIC DIAGRAM can be found on page 6-1.
MAIN PWB-A1