Read Sharp QT-CD250 (serv.man6) Service Manual online
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
5
1
7
8
9
6
12
13
14
15
11
17
18
19
10
16
22
23
24
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
FM/AM
VCC
DIYIDE
DECODE
LPF2
LPF1
DET 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
VOLUME
OUT
IN
LD1
LD2
A-GND
STB
DATA
R-ch
VOLUME
VOLUME
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