Sharp XL-MP80H Service Manual page 47

IC501 VHIBD3881FV-1: Record/Playback Amp. (BD3881FV)
No. Terminal Name
1 PB1N
2 PB1P
3 PB2P
4 PB2N
5 PB2O
6 PB1O
7 VOLIN1
8 VOLIN2
9 GND
10 TRE1
11 TRE2
12 VDD
13 CONT
14 VEE
28
REC1O REC1N REC2N REC2O INC2
PB1N
1
Function
Ch1 Tape Filter Pin
Ch1 Tape Input Pin
Ch2 Tape Filter Pin
Ch2 Selector Output Pin
Ch2 Selector Output Pin
Ch1 Selector Output Pin
Ch1 Volume Input Pin
Ch2 Volume Input Pin
Ground Pin
Ch1 Treble Filter Setting Pin
Ch2 Treble Filter Setting Pin
Positive Power Supply Pin
Serial Control Receiving Pin
Negative Power Supply Pin
27 26 25 24 23
20k
9.3k
20k
9.3k
PB1P PB2P PB2N PB2O
2 3 4 5 6
Figure 4 BLOCK DIAGRAM OF IC
No. Terminal Name
15 BAS2 Ch2 Bass Filter Setting Pin
16 OUT2 Ch2 Output Pin
17 BAS1 Ch1 Bass Filter Setting Pin
18 OUT1 Ch1 Output Pin
19 INA1 Ch1 Input Pin A
20 INA2 Ch2 Input Pin A
21 INB1 Ch1 Input Pin B
22 INB2 Ch2 Input Pin B
23 INC1 Ch1 Input Pin C
24 INC2 Ch2 Input Pin C
25 REC2C Ch2 REC Output Pin
26 REC2N Ch2 REC Filter Pin
27 REC1N Ch1 REC Filter Pin
28 REC1O Ch1 REC Output Pin
22 21 20 19
INC1 INB2 INB1 INA2 INA1
18dB
TREBLE
VOLUME
18dB
VOLUME
PB1O VOLIN1 VOLIN2 GND TRE1
7 8 9 10
8 – 3
XL-MP80H/MP80E
Function
18 17 16 15
OUT1 BAS1 OUT2 BAS2
BASS BASS
Logic Control
TREBLE
TRE2 VDD CONT VEE
11 12 13 14