Sharp QT-CD161 Service Manual page 18

QT-CD161/141
A
B
+B
10K
R39
1
2
C49
1/50
C48
R38
C
1/50
6.8K
R36
2.2K
C47
R37
1/50
6.8K
R35
C45
2.2K
0.022(M)
D
3
CF2
C33
2
1
22/16
+B
C31
C32
0.022 0.022
3
E
1
C13
47/16
R5
10K
C12
0.022
R56
47
9
C9
33P(CH)
8
R4
F
10
7
T1
C8
15P(CH)
6
5
4
G 3
2
C2
1
0.01
D2
1SS133
F1
D1
1SS133
H
FM
ROD ANTENA
• NOTES ON SCHEMATIC DIAGRAM can be found on page 9.
1
P16 1-E
21 22 23
C43
0.0015
(STYROL)
TP2
3
Q9
KRA109 M R29 R30
1.2K 15K
VCO
12 NC 13
VR1
C42
VCO
6.8K(B)
11
AM/FM
3.3/50
14
R CH D4
10
FM
15
1SS133
–M/ST
9 L CH
MPZ
16
–IN
C41
3.3/50
C40
8
TUN IND
470P
17
7
DTE OUT
ST IND
18
6
GND
R25
C38
C36
5
AM IF 33K
0.018
0.0022
(M)
19
FM DET 20
4
C34
220/10
AM
3
MIX
FM +B 21
2
AM RF
22
IN AM +B 23
1 FM IF
AM
24
OSC
CF1
2
R7
C11
4.7K
22P(CH)
R13
VD2
390
KV1360NT
FM BAND
COVERAGE
C14
0.022
R3
33K
C16
0.022(M)
R1
R2 22(1/4W)
100K
C6
0.01(M)
C5
0.01(M)
2 3
Figure 18 SCHEMATIC DIAGRAM (5/6)
P19 8-A,P16 1-E
24 25 26 28 29 30 31 32
R72
1K
+B
+B
ZD1
DZ5.1BSB
C50
0.022
R46
56K
R48
56K
R47
56K
C57
100/10
R43
47K
X1
4.5MHz
C21
2 3 4 5 6 7 8
1
0.022
C72
16 14
15 13
0.001
R16
C27
2.2K
0.022
R6
C26
560
0.022
C35
R15
0.022 C25
1.2K
0.001
R17
+B
10K
C24
TP1 2.2/50
Q3
KTC3199 GR
Q3,Q4:VT
CONTROL
R12
C20
4.7K
R11
470P
56K
C18
0.022
R9
100K
C17
0.047
C19
12P(UJ)
R10
L4 68K
L3
C52
0.022
C51
10/16
4
– 18 –
+B
PIN
NO. VOLTAGE
1
R51
1K
2
3
4
5
6
7
8
9
C56
0.01
3
1
2
R20
6.8K
12 11 10 9
1
2
3
C28
2.2/50
C22
0.01(M)
R18
47K
IC2
PIN PIN
NO. VOLTAGE VOLTAGE
NO.
1 1.6V 1.2V (0V)
13
2 1.6V 14 1.9V (1.6V)
3 6V (6.3V) 15 1V (1.3V)
4 0.2V (0.7V) 16 1.7V
5 1.6V 17 1.5V (1.7V)
6 0V 18 1.5V (1.5V)
7 0V 19 0.4V (0.4V)
0V 6.1V (6.4V)
8 20
9 2.5V 21 6.1V (6.4V)
10 2.5V 22 1.6V
R8 11 5.1V (6.6V) 23 1.6V
47K
12 0.8V (1V) 24 1.6V
Q1
KTC3194 Y
RE AMP.
C71
0.022
IC3
PIN PIN
VOLTAGE
NO. NO.
C58
1 2.4V 10
0.01
2 2.3V 11
3 6.8V 12
4 0.1V 13
5 4.9V 14
C70
C59
0.001 6 3.0V 15
0.022
7 –– 16
––
8
9 ––
AM BAND
COVERAGE fL
FM SIGNAL
AM SIGNAL
MAIN PWB-A1(3/4)
5
IC1
0.9V
1.6V
6.8V
0V
0V
6.8V
1.4V
6.2V
6.8V
( ): AM
VOLTAGE
––
0V
2.3V
GND
0V
––
0.5V
6