Pin Description - LG CRD-8483B Service Manual

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Pin Description

Pin No.
Symbol
1
GND
2
TEST
3
MDI
4
LDO
5
CSPI
6
CSNI
7
FNI
8
FPI
9
TPI
10
TNI
11
LDC
12
TEST
13
TEST
14
TEST
15
TEB
16
RST_
17
V2REFO
18
SBAD
19
TEO
20
TEN
21
CSO
22
FEP
23
FEN
24
TEST
25
TEST
26
TEST
27
FEO
28
VREFO
29
CKIN
30
VCC
31
RFON
32
TEST
33
TEST
34
TEST
35
TEST
36
RFO
37
TEST
38
RFGS
39
RFN
40
CSOSEL
41
PDD
42
PDC
43
PDA
44
PDB
45
RFGC
46
RFP
47
TEST
48
TEST
14
Type
Power
Negative power supply.
Test pin
No connect.
Analog Input
Voltage for monitor laser diode photo power.
Analog Power
Laser diode control output.
Analog Input
Central Servo input 1
Analog Input
Central Servo input 2.
Analog Input
Main beam I-V amplifier (A+C) input.
Analog Input
Main beam I-V amplifier (B+D) input.
Analog Input
Sub beam I-V amplifier F input.
Analog Input
Sub beam I-V amplifier E input.
Input
Laser diode control input. H: Laser diode on, L: Laser diode off.
Test pin
No connect.
Test pin
No connect.
Test pin
No connect.
Analog Input
Input for Tracking error balance adjustment.
Input
Reset input. Active low input is used to reset the offset adjustment circuit.
Analog Output
A reference voltage output. Typical value is 4.0 v.
Analog Output
Sub beam adder signal output.
Analog Output
Tracking error output. Connect to TEZI of MT1198.
Analog Input
Negative input of tracking error amplifier.
Analog Output
Central Servo control output. Connect to TEI of MT1198.
(CSOSEL = "0", Track on : TEO ; CSOSEL = "1", Seeking : CSO)
Analog Input
Positive input of focusing error amplifier.
Analog Input
Negative input of focusing error amplifier.
Test pin
No connect.
Test pin
No connect.
Test pin
No connect.
Analog Output
Focusing error output.
Analog Output
A reference voltage output. Typical value is 2.0v.
Input
10KHz clock input for TEO, FEO, SBAD offset adjustment.
power
Positive power supply.
Analog Output
Negative output RF signal.
Test pin
No connect.
Test pin
No connect.
Test pin
No connect.
Test pin
No connect.
Analog Output
The output of RF signal.
Test pin
No connect.
Input
RF gain selection, "0" for 4X (rf signal) 3X (servo signal) and "1" for normal
gain. It is internally pulled high.
Analog Input
The reference input of RF signal. Typical value is 2.0 v.
Digital Input
Central Servo output select signal. Come from I08 of MT1198.
Analog Input
The pick-up input signal D of the RF amplifier.
Analog Input
The pick-up input signal C of the RF amplifier.
Analog Input
The pick-up input signal A of the RF amplifier.
Analog Input
The pick-up input signal B of the RF amplifier.
Analog Input
The gain-controlled voltage of the RF amplifier.
Analog Input
Positive input of the RF amplifier.
Test pin
No connect.
Test pin
No connect.
Description
1
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