LG LX-D2640 Service Manual page 21

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