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3.MICOM EXPENDER IC BU2090 (IC703)
Pin NO.
Symbol
1
VSS
VSS
2
DATA
DATA
3
CLK
CLK
4
Q0
RELAY
5
Q1
ECHO_B
6
Q2
ECHO_A
7
Q3
ECHO_C
8
Q4
P_CTRL
9
Q5
REC_MUTE
10
Q6
PB_MUTE
11
Q7
REC_BEAT
12
Q8
TAPE A/B
13
Q9
REC_BIAS
14
Q10
CD-POWER
15
Q11
HI_SPEED
16
VDD
VDD
MIC PCB
1. M65850P IC402
Pin NO.
Symbol
1
LPF1 IN
2
LPF1 OUT
3
OP1 OUT
4
OP1 IN
5
CC1
6
CC2
7
GND
8
LPF2 OUT
9
LPF2 IN
10
OP2 OUT
11
OP2 IN
12
REF
13
CLOCK
14
VCC
2.RECORDING ALC IC BA3308 IC401
Pin NO.
Symbol
1
NG1
L-NF
2
IN1
L-IN
3
OUT1
L-OUT
4
GND
GND
5
ALC
ALC
6
VCC
DC+12
7
OUT2
R-OUT
8
IN2
R-IN
9
NF2
R-NF
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Description
GND.
u-COM IC DATASIGNAL Recive.
u-COM IC CLKSIGNAL Recive.
speaker RELAY CONTROL.
MIC ECHO adjument level
MIC ECHO adjument level
MIC ECHO adjument level.
POWER IC CONTROL terminal control.
REC Signal Mute Control.
Playback Mute Control.
REC BEAT Rejection Control.
TAPE A TAPE B select.
REC BIAS Power Control.
CD power control.
DECK REC SPEED NORMAL HI ADJUSTMENTS.
DC +5V.
Description
LOW FASS FILTER 1 INPUT
LOW FASS FILTER 1 OUTPUT
OPERATIONAL AMPLIFIER 1 OUTPUT
OPERATIONAL AMPLIFIER 1 INPUT
CURRENT CONTROL 1
CURRENT CONTROL 2
GND
LOW FASS FILTER 1 OUTPUT
LOW FASS FILTER 1 INPUT
OPERATIONAL AMPLIFIER 1 OUTPUT
OPERATIONAL AMPLIFIER 1 INPUT
REFERENCE
CLOCK GENERATOR INPUT
DC +5V
Description
L-CH FEED BACK signal input PORT.
L-CH signal input PORT
L-CH signal output PORT
GND
ALC TIMING driving external constant CONNECTED PORT
DC 16V
R-CH REC signal output PORT.
R-CH REC signal input PORT.
R-CH FEED BACK signal input PORT
- 2-14 -
(V)
Remarks
0
-
0
I
0
I
0
I
6
O
5
O
5
O
0
O
6.5
O
0.2
O
0.2
O
4.3
O
4.3
O
0
O
0
O
5.3
-
(V)
Remarks
2.6
I
2.6
O
2.6
O
2.6
I
0.6
-
0.6
-
0
-
2.6
O
2.6
I
2.6
O
2.6
I
2.6
-
0.9
I
5
-
(V)
Remarks
1.7
O
0
1.7
O
0
I
0
11.1
1.7
O
0
1.7
O
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