No Power Problem - LG FA162 Service Manual

1. NO POWER PROBLEM

No power problem occurs when you power on the unit.
1-1. Solution
Replace X100, IC101, IC103.
1-2. How to troubleshoot (Countermeasure)
1) Check X100(Crystal).
If it does not oscillate, change X100.
2) Check IC103(Reset IC).
IF its output voltage is not more than +2.7 V, change IC103.
3) Check IC101(Micom).
After Power is ON if the 8pin of IC101 is not 'High', change IC101.
But, the new μ-com IC need to write program.
C107
22pF
X101
32.768KHZ
C106
22pF
C103
12pF
C104
12pF
DGND
R106
3.3VA 12K
IC103
AZ7027RTRE1
1
VCC
R107
100(2)
C129
C115
1000uF
100nF
DGND
1-3. Service hint (Any picture / Remark)
X100
IC101
ONE POINT REPAIR GUIDE
D V D _ S P I _ C E
R E M O C O N
1 2 R104
R E S E T
4.7M
4 3
R171
330K
R105
X100
1M 4.7K
R172
12MHZ
KEY1
USB_CTRL
DVD_SPI_DO
DVD_SPI_DI
2 3
R108
33(2)
OUT
GND
RESET
3.3V_MICOM
C124
C100
22uF/16V(3)
10nF
IC103
< MAIN board top view >
I_AMP_CLIP0
51
R163 100
I_DVD_CE
R164 100 52
I_REMOCON
53
R165 100
RESET
54
XT1
55
XT2 IC101
56
DGND
VSS1
57
CF1
LC87FC096AVU
58
CF2
C110
59
100nF
VDD1
DGND
60
R166 100
I_KEY1
61
I_MIC_DET
R167 62
100
O_USB_CTRL
63
100
R168
O_DVD_DO
64
100
R169
I_DVD_DI
3-2
O_PWM_DAT R132
30
O_EXP_DAT R183
29
R184
O_EXP_CLK
28
O_TOUCH_CLK R129
27
R128
P_TOUCH_DAT
26
R127 100 (XX)
O_FAN_CTRL
25
R126
O_TUNER_CLK
24
P_TUNER_DAT R125 100
M23
23
R179 100
O_ADC_CLK
22
O_TUNER_RST R124
21
O_I2S_CTRL2 R123
20
R122
O_I2S_CTRL1
19
R121
O_PWM_RST (TAS5548)
18
O_HP_MUTE R120
M17
17
R176
O_PWM_MUTE
3.3V_M
DVCC_3
4.7K
R130
DGND
R119
4 7K
10
10
10
10
100
100
0
0
100
100
100