LG CED-8083B Service Manual page 62

IC409(M62352GP)
1) The M62352 is an integrated circuit semiconductor of CMOS structure with 12 channels of built-in
D-A converters with output buffer operational amplifiers.
2) Outputs of 12 channels are used for adjustment/control of servo circuits and references.
Block Diagram
GND
20
R-2R D-A
Ch2
(12)
R-2R D-A
BUFFER
OP AMP
1
Vss
(VrefL)
• Pin Description
Pin No. Pin Name
1 Vref-
2 AO3
3 AO4
4 AO5
5 AO6
6 AO7
7 AO8
8 AO9
9 AO10
10 Vref+
Ao2 Ao1 DI
19 18
17
8-BIT
D-A
1
8-BIT
L
LATCH
8-BIT
L L
LATCH
Ch3 4 5
8-BIT
D-A D-A
2 3 4
Ao3 Ao4 Ao5
Description
GND
B-level Reference
Write power reference
Write power reference
HAVC Offset
Track SPP Reference
Reserved
Hall Bias
Sled Offset
4V
CLK LD Do
16 15 14
12-BIT SHIFT REGISTER
D01 2 3 4 5 6 D7 D8 9 10 D11
ADDRESS
DECODER
(8)
(12)
L L L
6 7 8
D-A D-A D-A
5 6
Ao6 Ao7 Ao8
Pin No.
11
12
13
14
15
16
17
18
19
20
Ao12 Ao11
13 12
D-A D-A
12 11
L L
(12)
L L
9 10
D-A D-A
7 8 9
Ao9 Ao10
Pin Name
VCC 5V
AO11 Tray Control
AO12 VWDC protect reference
ED Serial data output terminal
LD LD terminal input
CLK Serial clock input terminal
DO Serial data input terminal
AO1 Read power reference
AO2 VWDC2 Power reference
GND GND
Vcc
11
10
V
DD
(VrefU)
Description
45