LG CED-8081B Service Manual page 60

IC501 (BA5983 FM)
1) It controls the sled movement in track search mode and takes the tray to open/close.
2) It controls the Focus/Tracking Actuator receiving the focus error or tracking error signal from IC201.
Block Diagram
28 27
+
Vcc
+
1 2
• Pin Description
Pin No. Pin name
BIAS IN
1
2 OPIN1(+)
OPIN1(-)
3
4
OPOUT 1
5
OPIN2(+)
OPIN2(-)
6
OPOUT 2
7
8 GND
9
STBY1
10
PowVcc1
11 VO2 (-)
VO2 (+)
12
13
VO1 (-)
VO1(+)
14
46
26 25 24 23
+
10K
20K
10K
-
+
+
10K
-
10K
10K
+
3 4 5 6
Description
Bias amplifier input
Driver CH1 positive input
Driver CH1 negative input
Driver CH1 output
Driver CH2 positive input
Driver CH2 negative input
Driver CH2 output
GND
CH1~3 standby control
PowVcc (CH1,2)
Driver CH2 negative output
Driver CH2 positive output
Driver CH1 negative output
Driver CH1 positive output
22 21 20
Standby
CH4
20K
-
+
+
-
10K
Standby
CH1, 2, 3
7 8 9
Pin No. Pin name
15 VO4(+)
16 VO4 (-)
17 VO3(+)
18 VO3 (-)
19
PowVcc2
20 STBY2
21
GND
22
OPOUT 3
OPIN3(-)
23
24
OPIN3(+)
25
OPOUT 4
OPIN4(-)
26
27
OPIN4(+)
28 PreVcc
19 18 17 16
CH3
Vcc
10K 10K
10K
10K 10K
10K
LEVEL
SHIFT
LEVEL
SHIFT
10K
10K
10K
Vcc
10K 10K
CH2
10 11 12 13
Description
Driver CH4 positive output
Driver CH4 negative output
Driver CH3 positive output
Driver CH3 negative output
PowVcc (CH3,4)
CH4 standby control
GND
CH3 output
CH3 negative input
CH3 positive input
CH4 output
CH4 negative input
CH4 positive input
PreVcc
15
CH4
10K
10K
LEVEL
SHIFT
LEVEL
SHIFT
10K
10K
CH1
14