Service manual

QT-CD250H/W
– 26 –
IC1 VHiTA2104BN-1: FM /AM IF MPX. (TA2104BN)
Figure 26 BLOCK DIAGRAM OF IC
IC202 VHiTC9260P/-1: Electronic Volume (TC9260P)
2 3 4 51 7 8 96 12
131415
11
171819
10
16 222324 21 20
FMRE
AM
MIX
FM
MIX
BUFF
BUFF
FM
OSC
AM
OSC
LEVEL
DET
ST
FW
IF
REQ
1/8
AN
DET
AF
BUFF
AF
FM
DET
AGC
FMIF
AMIF
MUTE
ST/MO
FM/AM
VCC
DIYIDE
DECODE
LPF2LPF1DET OUT
IFREQ
ST IND
OSC OUT
AM OSC
FM OSC
AM RF IN
FM RF
FM RF OUT
RF GND MIX OUT
FM RF ON
AM
LOW OUT
IF
BUFF
Vcc AM IF IN
FM IF IN GND AGC QUAD
R-OUT L-OUT
MPX IN
2
3
4
5
1
7
8
9
6
12
13
14
15
11
10
16
DATA DECODER, STB GENERATOR
SHIFT REGRATER (13bit)
L-ch
LATCH
R-ch
LATCH
Vss
V
DD
OUT
IN
LD1
LD2
A-GND
CS
CK
L-ch
VOLUME
OUT
IN
LD1
LD2
A-GND
STB
DATA
R-ch
VOLUME