Sharp QT-CD111 Service Manual page 12

QT-CD111/111C
A
ROD ANTENA
F1
B.P.F.
1 2 3
D1
1N4148
B
IC1 FM
TRACKING
PIN
NO. VOLTAGE
fL fH
1 0.9V
2 1.6V
6.8V
3
4 0V
0V
5
L1
6 6.8V FM ANT.
1.4V
7
8 6.2V
9 6.8V
C
220P
C11
D
R456
15K
R-CH
1
AUDIO GND 2
L-CH
3
CD +7.4V 4
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
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
(CH)
(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
C46
2P
L4
AM OSC.
R458 R457
1.2K 1.2K
fH
fL
AM BAND
COVERAGE
R455
15K
C105
R104
R103
12K 1800P
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
1800P
R106
15K
2 3
Figure 12 SCHEMATIC DIAGRAM (3/4)
R6
820K
C14
0.022
C37
C39
220/10 C22
0.022
0.0039
FM DET
fH
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
8.2K
R115 R117
3.9K
3.9K
C113
47/16
(ML)
3 PRE AMP 1
NF1 8
OUT1
IC101
VCC
5
IN1 BA3311L
10
FILTER
REC./P.B.
EQUALIZER AMP.
ALC T
IN2
9 2
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 –
C38
R11
0.022 1.2K
C24
470P
VR1
6.8K
C25
R27
(B)
3.3/50
33K
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
R122
R124
1.5K
3.3K
(P.P)
C351
0.0022
(ML)
5
PIN
NO. VOLT
1 1.6V
2 1.6V
3 6V (6
0.2V
4
5 1.6V
VCO
0V
6
7 0V
8 0V
9 2.5V
10 2.5V
11 5.1V
MPX VCO
12 0.8V
CK 76kHz
SW102-G
R
R351
330
L301
150 4
R352 R
C353
0.022
C352
(ML)
220/16
6