Service manual
QT-CD161/141
– 18 –
Figure 18 SCHEMATIC DIAGRAM (5/6)
• NOTES ON SCHEMATIC DIAGRAM can be found on page 9.
A
B
C
D
E
F
G
H
1
2
34 5
6
8
7
3
2
6
5
4
9
1
C12
0.022
C7
0.001
R2
100K
C6
0.01(M)
D2
1SS133
C4
27P(CH)
C2
0.01
C3
4.7P(CH)
T1
R56
47
R3
33K
CF1
C16
0.022(M)
C14
0.022
R1
22(1/4W)
C5
0.01(M)
C13
47/16
IC1
TA7358AP
F1
C8
15P(CH)
L1
R7
4.7K
VD1
KV1360NT
C10
24P
(UJ)
FM OSC
L2
14
15
1
2
4
5
3
6
7
8
20
19
18
17
16
24
23
22
13
TP2
21
12
11
9
10
TP1
C42
3.3/50
C32
0.022
C31
0.022
C33
22/16
C38
0.018
C41
3.3/50
IC2
LA1805
FM/AM/IF MPX.
C36
0.0022
R29
1.2K
VR1
6.8K(B)
C43
0.0015
(STYROL)
R30
15K
T2
R25
33K
C47
1/50
R37
6.8K
C48
1/50
R38
6.8K
C40
470P
C34
220/10
C35
0.022
C49
1/50
T3
CF2
R35
2.2K
C45
0.022(M)
R36
2.2K
C46
0.022(M)
C37
0.022
R44
180(1/4W)
R17
10K
R42
4.7K
D3
1SS133
10K
R39
R43
47K
R24
3.9K
Q9
KRA109 M
R70
22K
Q4
KTC3199 GR
C25
0.001
C24
2.2/50
R15
1.2K
Q3
KTC3199 GR
Q3,Q4:VT
CONTROL
D4
1SS133
24
25
26
R9
100K
VD3-1
KV1591A-2
C17
0.047
R12
4.7K
L4
R10
68K
VD3-2
KV1591A-2
C19
12P(UJ)
C20
470P
R11
56K
L3
C18
0.022
C52
0.022
C51
10/16
9
10
11
12
13
14
15
16
1 2 3 4
5
6
7
8
X1
4.5MHz
C29
12P(CH)
C30
15P(CH)
ZD1
DZ5.1BSB
R20
6.8K
R18
47K
C27
0.022
IC3
TC9216P
@
PPL
C50
0.022
R45
220(1/4W)
R52
1K
R48
56K
R47
56K
R46
56K
R50
1K
R51
1K
C21
0.022
Q5
KRA102 M
Q6
KRC104 M
Q5,Q6:FM RIPPLE FILTER
C56
0.01
L5
CH 470µH
C57
100/10
C26
0.022
R6
560
R13
390
Q1
KTC3194 Y
RE AMP.
R8
47K
C9
33P(CH)
R4
10
R5
10K
C11
22P(CH)
R71
6.8K
VD2
KV1360NT
R16
2.2K
TC1
5P
21
22
23
28
29
30
31
32
C60
100P
R72
1K
C58
0.01
C71
0.022
C59
0.022
C70
0.001
C22
0.01(M)
C28
2.2/50
C72
0.001
FB
B.P.F
FM IF
IN
MIX
AM
AM
AM
OSC
AM RF
+B
+B
FM
FM DET
MPZ
–IN
AM IF
GND
TUN IND
VCO
NC
AM/FM
L CH
R CH
GND(D)
TUNER +B
PLL(DATA)
PLL(CLOCK)
PLL(PERIOD)
MONO/STEREO
STEREO
TUNED
AM TRACKING
fL fH
IF-IN
AM-IN
DO 1
DO 2
VDD
GND
(M)
R-CH
GND(A)
L-CH
FM FRONTEND
1
3
2
1
2
3
1
2
3
FM
ROD ANTENA
1
2
3
D1
1SS133
FM IF
FM RF
FM BAND
COVERAGE
2
3
1
+B
1
2
3
AMIF
FM DET
+B
+B
+B
VCO
+B
+B
AM BAND
COVERAGE fL
AM OSC
AM ANT
MAIN PWB-A1(3/4)
I/O5(ST)
OT-3
OT-2
OT-1
PERIOD
FM-IN
CLOCK
DATA
X IN
X OUT
+B
FM SIGNAL
AM SIGNAL
+B
FM
–M/ST
DTE OUT
ST IND
P19 8-A,P16 1-E
P16 1-E
9
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
PIN
NO.
PIN
NO.
VOLTAGE VOLTAGE
IC3
2.4V
2.3V
6.8V
0.1V
4.9V
3.0V
––
––
––
––
0V
2.3V
GND
0V
––
0.5V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC2
1.6V
1.6V
6V (6.3V)
0.2V (0.7V)
1.6V
0V
0V
0V
2.5V
2.5V
5.1V (6.6V)
0.8V (1V)
21
20
19
18
17
16
15
14
13
24
23
22
PIN
NO.
VOLTAGE
1.2V (0V)
1.9V (1.6V)
1V (1.3V)
1.7V
1.5V (1.7V)
1.5V (1.5V)
0.4V (0.4V)
6.1V (6.4V)
6.1V (6.4V)
1.6V
1.6V
1.6V
( ): AM
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