Service manual

QT-CD131/131C
– 11 –
Figure 11 BLOCK DIAGRAM (3/3)
X IN
FM IN
X OUT
VSS
AM IN
IF IN
VT
AM MIX OUT
X1
4.5MHz
DOUT
DATA
CLOCK
PERIDO
OF1
CF2
AM IF IN
AM OSC
AM MIX OUT
FM IF IN
AM IF IN
GND
AM RF IN
FM DET
DET OUT
STEREO
TUNER
MPX VCO
MPX IN
R-CH OUT
L-CH OUT
MO/ST
FM DET
VR1
VCO
FM+B
FM RIPPLE
FILTER
TO MAIN SECTION
CF1
VT
VT
F1
B.P.F
L1
VD1
FM RF
L2
VD2
FM OSC
T1
FM IF
Q1 RF AMP.
FM+B
FM ROD
ANTENA
SWITCHING
MUTE
24
22
20
18
13
16
10
15
9
1
2
8
7
6
5
3 4
5
6
12
11
10
1
22
13
14
1
6
3 4
9
7
8
IC3
TC9216P
PLL CONTROLLER
+B
21
+B
IC2
LA1805
FM IF DET.
/FM MPX./AM IF
IC1
TA7358AP
FM FRONT END
5
T3
AM IF
Q5 Q6
Q10
AM OSC OUT
VT CONTROL
Q3 Q4
L3
AM ANT.
VD3-1
TC1
L4
AM OSC.
VD3-2
23
24
31
45
44
43
50
51
1
6
7
8
9
65
80
41
48
33
30
22 20
SW504 MEMORY SW503 TUNER UP SW502 TUNER DOWN SW501 BAND SW505 PRESET UP SW506 PRESET DOWN
LCD501
LCD DISPLAY
11
10
9
8
7
6
5
4 3 2 1
1213
14
15
16
17
18
19
20
21
MONO/ST
IC501
TUNER
MICROCOMPUTER
Q501 Q502
TUNER +B
IC502
RESET
RESET
A-GND
AUDIO +12V
+5V
VOLTAGE
REGULATOR
ZD1
D GND
TUNER +B