Sharp MD-M3 Service Manual page 72

MD-M3/M1
ICP11 VHiM62439SP-1: Audio Processor (M62439SP)
Terminal Name
Pin No.
1 REC OUT Channel 1 REC OUT terminal. Useable for spare input terminal.
2 IN A1
3 IN B1
Channel 1 input terminal.
4 IN C1
5 IN D1
6 TONEH1 Channel 1 treble frequency control terminal.
7 TONEL1 Channel 1 bass frequency , gain control terminal.
8 OUT1 Channel 1 output terminal.
9 GND GND.
10 VDD + Power.
11 CONT Microcomputer data input terminal.
12 VSS – Power.
13 OUT1 Channel 2 output terminal.
14 TONEL2 Channel 2 bass frequency , gain control terminal.
15 TONEH2 Channel 2 treble frequency control terminal.
16 IN A2
17 IN B2
Channel 2 input terminal.
18 IN C2
19 IN D2
20 REC OUT Channel 1 REC OUT terminal. Useable for spare input terminal.
REC OUT 1
INC1
IND1
TONEH1
TONEL1
OUT1
1
2
INA1
3
INB1
4
5K
5
6
21.6K
Treble
boost
7
46K
8
Bass
boost
9
GND
10
VDD
Figure 72 BLOCK DIAGRAM OF IC
Function
Rec out SW
Input SW
Monophonic SW
MUTE
5K
Volume
30K
30K
2.4K 2.4K
21.6K
46K
Control Logic
– 72 –
20
REC OUT 2
19
INA2
18
INB2
17
INC2
16
IND2
15
TONEH2
14
TONEL2
13
OUT2
12
VSS
11
CONT