Sharp MD-S301 Service Manual page 42

MD-S301/S301W
IC402 VHiS29L294A-1 (S29L294A): E
IC831, IC832 VHiiR3M09N/-1 (IR3M09N): Power Driver
IC702 VHiiR3R54N/-1 (IR3R54N): Audio Amp.
LOGIC
INPUT
SERIAL DATA
R HEADPHONE OUTPUT
L HEADPHONE OUTPUT
BIAS INPUT
MIC R INPUT
MIC L INPUT
2
-PROM
8 Pin SSOP
Top view
CS
1
SK 2
DO
3
DI
4
OSCIN OSCOUT ROSC
12 11
OSC
STAND-BY
VREF
1 2
VREF DB EAIN(+)
LATCH 13
CLOCK 14
15
D GND 16
VEE 17
18
HP
19
HP
VCC 20
21
22
MIC GND 23
24
Figure 42 BLOCK DIAGRAM OF IC
8
V
CC
7
NC
6
PROTECT
5
GND
STATE VCC
10 9
1
Vcc
2
LOGIC
PWM
3 4
EAIN(-) EAOUT
– 42 –
OUT
8 7
5 6
GND
12 R OUTPUT
11 R HP INPUT
10 L OUTPUT
9 L HP INPUT
8 HP AMP BIAS
7 A GND
6 LINE R INPUT
5 LINE L OUTPUT
4 MIC SELECT R INPUT
3 MIC R OUTPUT
2 MIC SELECT L INPUT
1 MIC L OUTPUT