Sharp QT-MP3W Service Manual page 57

U903 92L31000961810 : CD RF ( SA9618 )
VTH 1
2
LD
3
MON
PD1 4
PD2 5
6
GND
7
VREF
8
NC
6P
10K
8K
2K
PD2
VREF
5
VREF
6P
10K
8K
2K
VREF
4
VREF
6K
RFI
12
54K
VREF
AGC
Mode
14
SW
VTH
1
3.4K
55K
VREF
10K
MON
3
Figure 7-7 BLOCK DIAGRAM OF IC
16 V
DD
15
LDON
14
AGC
13 RFRC
12 RFI
11
RFO
10
RFM
9
NC
30K
30K
2K
2K
VREF
55K
1.24V
VL
10K
10K
55K
12K
7 – 9
VREF
7
RFM
10
RFO
11
V
DD
16
RFRC
13
GND
6
LD
2
LDON
15
NC
8
NC
9
QT-MP3W