Service manual

6.3. NO DISPLAY
6.4. LOSE COLOR
Y
Power key
Check
Work ok
Keypad
Check
5VMCU
N
Check
I102
NN
Y
Check
Check
H V sync
I101
Check
P101
N
Check
I/O cable
NN
Y
Check R.G.B
Check
DATA
I/O cable
Check
N
Check
P102
N
N
Y
Check
Check
X101
C126,C127
Check
N
Check
N
N
VCC2.5V,3.3v
I101,I102
Y
Check I101
Check
HS,VS
SCL,SDA
Check
N
Check
N
N
I105,
SCL,SDA
I102,
SCL,SDA
HWRESET
Check
BACKLITE
Check
Q102
Check
N Check
N
N
PANEL
P102 WIRE
I101
Some bits
lost
Check
Pin102~128
Y
I108 or
R-pack
soldering
N
I107 poor
soldering
I106 poor
soldering
N
P105 poor
soldering
Lose color
R or G or B
Check
P102
Pin 8,10,12
Y
Check
Sign Cable
N
Check
C115,118,122
C117,121,124
Check
L101,102,103
R112,115,119
N
I108
fail or
Poor soldering
Y
Y
ViewSonic Corporation Confidential - Do Not Copy VA902-3_VA902b-3
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