LG GSA-5163D Service Manual page 72

PCB Poor Analysis - Check list
No Circuit/IC
1 Power supply
2
3 (IC701)
4 (IC702)
5 (IC703)
6
7 Flash-ROM
8 (IC302)
9
10 DSP
11 (IC301)
12
13
14
15 AFE
(IC101)
16 OP-amp
17 (IC201)
18 7ch-DRV
19 (IC601)
20
21
22 Pick-up
23
24
25
26
27
28
* When there are twe or more power supply pins of LSI, it checks by one ramdom pin first.
81
Signal Signal/Level
Line-12V 12V
Line-5V 5V
reg-5.3V 5.3V
reg-3.3V 3.3V
reg-1.5V 1.5V
reg-2.8V 2.8V
VDD : 3.3V 3.3V
CS Active-Low
XRD read-CK
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
VCC : 5.3V 5.3V
VDD:3.3V 3.3V
VCC : 5.3V 5.3V
VC165 1.65V
5VCC : 5V 5V
VM3 : 5V 5V
VM1, 2 : 12V 12V
REF : 1.65V 1.65V
AVCC : 5.3V 5.3V
VC21 2.1V
VC165 1.65V
VC25 2.8V
VSL25 : 2.8V 2.8V
VSA5 : 5.3V 5.3V
VSO : 5.3V 5.3V
mesurement-point (IC-pin or Device)
CN108-41
CN108-44
R711
2,5
2
5
37
26
28
32, 53,128, 213, 173, 188
3, 10, 18, 23, 31, 39, 50, 62, 78, 91, 159, 176, 191, 222,
244, 256
98, 99, 111, 122, 129, 138, 153
254, 255
5
17, 75
12, 27, 57, 70, 79, 89
4
8
32
26
5, 22
42
8
13
28
32
40
41
42