LG GSA-4040B Service Manual page 85

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