LG GDR-8161B Service Manual page 27

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Pin Description
No
1
LPC1
Laser pin input (DVD head)
2
LPCO1
Laser drive output (DVD head)
3
LPC2
Laser pin input (CD head)
4
LPCO2
Laser drive output (CD head)
5
VFOSHORT VFOSHORT control
6
TBAL
Tracking balance control
7
FBAL
Focus balance control
8
POFLT
Tracking detection threshold level
9
DTRD
Data slice data read signal input (for RAM)
10
IDGT
Data slice address gate signal input(for RAM)
11
STANBY
Standby mode control
12
SEN
SEN (serial data input)
13
SCK
SCK (serial data input)
14
STDI
STDI (serial data I/O)
15
RSCL
Reference current supply
16
JLINE
J-line current setting
17
N.C.
18
TEOUT
Tracking error signal output
19
N.C.
20
ASOUT
Full addition signal output
21
LNSC
Differential tracking error signal output
22
FEOUT
Focus error signal output
23
GND4
Ground 4
24
N.C.
25
VCC4
Power supply 4 (3.3V)
26
GND2
Ground 2
27
VREF2
VREF2 voltage output
28
VCC2
Power supply 2 (5V)
29
VHALF
VHALF voltage output
30
DFLTON
Filter amplifier inverted output
31
DFLTOP
Filter amplifier positige output
32
DCFLT
Filter output capacitance connection
Function
No
33
GND3
Ground 3
34
RFDIFO
Radial differential output
35
RFOUT
RF full-addition amplifier output
36
VCC3
Power supply 3 (3.3V)
37
N.C.
38
DCRF
DC-cut filter of RF full-addition amplifier
39
OFTR
OFTR output
40
BDO
BDO output
41
RFENV
RF envelope output
42
N.C.
43
PEAK
Peak envelope detection filter
44
AGCG
AGC amplifier gain control
45
AGCO
AGC amplifier level control
46
TESTSG
TEST signal input
47
RFINP
RF signal positive input
48
RFINN
RF signal inverted input
49
VIN5
Internal four-partition (CD) RF input 1
50
VIN6
Internal four-partition (CD) RF input 2
51
VIN7
Internal four-partition (CD) RF input 3
52
VIN8
Internal four-partition (CD) RF input 4
53
N.C.
54
N.C.
55
VCC1
Power supply 1(5V)
56
VREF1
VREF1 voltage output
57
VIN1
Internal four-partition (DVD) RF input 1
58
VIN2
Internal four-partition (DVD) RF input 2
59
VIN3
Internal four-partition (DVD) RF input 3
60
VIN4
Internal four-partition (DVD) RF input 4
61
GND1
Ground 1
62
VIN11
3-beam sub (CD) input 1
63
VIN12
3-beam sub (CD) input 2
64
HDTYPE
HD type selection
Function
35

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