Service manual

DTV
Check Inner RF cable is
OK?
Replace Inner RF cable
Check HDMI Cable is well
connected ?
Connect the cable
HDMI
No
No
Check I807 has output
signal at RP80~RP82
Replace I807
No
Check X801 has 27MHz
clock output
Replace X801
No
Check I127 has output
signal at RP32~RP41?
Replace I127
No
No
Yes
Yes
Yes
Yes
Yes
Check 27MHz is on Pin4 of
I115?
Check I106
No
Check I114 is defective Replace I114
Yes
Check I115 has output
signal at RP25~RP30?
Replace I115
Yes
No
Yes
Yes
No
Check I106 has output
signal at Pin11~16 and
Pin19~22 of P114 ?
Replace I106
No
Check the LVDS wire from
P803 to panel is OK?
Replace LVDS Wire
No
Check inverter wire from
power board to panel is
OK?
Replace Inverter Wire
No
Replace Panel
Yes
Yes
Yes
Check +30V on Pin9 +5V
on Pin17 of I804?
Replace I804
or I119
ViewSonic Corporation Confidential - Do Not Copy N4251w-1M
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