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LG GSA-4040B Service Manual page 85

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PCB Poor Analysis - Check list
No
Circuit/IC
1
Power supply
2
3
(IC501)
4
(IC504)
5
(IC505)
6
MPU
7
(IC801)
8
9
10
Flash-ROM
11
(IC802)
12
13
S-RAM
14
(IC803)
15
SD-RAM
16
(IC702)
17
DSP
18
(IC701)
19
20
21
22
23
AFE
24
(IC101)
25
OP-amp
26
(IC508)
27
28
29
SRV-DAC
30
(IC602)
31
32
6ch-DRV
33
(IC601)
34
35
Tilt-DRV
36
(IC603)
37
38
EEP-ROM
39
(IC804)
40
Pick-up
41
42
43
44
45
46
* When there are twe or more power supply pins of LSI, first of all, it checks by random one pin.
Signal
Signal/Level
Line-12V
12V
Line-5V
5V
reg-5.0V
5V
reg-3.3V
3.3V
reg-1.5V
1.5V
VDD : 3.3V
3.3V
Clock-5MHz
5.0MHz
PSRST
3.3V(High)
NMI
3.3V(High)
VDD : 3.3V
3.3V
CS
Active-Low
XRD
read-CK
VDD : 3.3V
3.3V
CS
Active-Low
VDD : 3.3V
3.3V
VDD : 1.5V
1.5V
VCC(D) : 3.3V
3.3V
VCC(A) : 3.3V
3.3V
Clock-34MHz
33.8688MHz
MRSTB
(3.3V)High
STANBYB
(3.3V)High
VCC : 5V
5V
VCC : 5V
5V
VC165
1.65V
VC25
2.5V
VC21
2.1V
VCC : 5V
5V
VDD : 3.3V
3.3V
RESET
(3.3V)High
DVCC : 5V
5V
VCC : 12V
12V
VC : 1.65V
1.65V
VCC : 5V
5V
VC : 1.65V
1.65V
STBY
(GND) Low
VCC : 3.3V
3.3V
Pull-up
3.3V
AVCC : 5V
5V
VC21
2.1V
VC165
1.65V
VC25
2.5V
VSL33 : 3.3V
3.3V
VSA5 : 5V
5V
VSO : 5V
5V
mesurement-point (IC-pin or Device)
PG901-56
PG901-53
L502
3
5
45, 62, 100, 126, 144
63, 64
71
37
37
26
28
8
30
1, 7, 13, 25, 38, 44
11, 90, 161, 188, 227
5, 81, 101, 151, 165, 174, 183, 199, 217, 230, 240, 250
46, 61, 77
126, 127
130 (MPU-76)
131 (MPU-75)
12, 27, 54, 72
4
8
1
7
8
7
4
54
51
27
8
2
1 (Low: on / High:off)
8
3, 7
8
13
28
32
40
41
42
87

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