XOCECO LC-40T7, Руководство по обслуживанию

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3. Troubleshooting guide
3.1 No raster, no picture and no sound
Note: Power supply for PDP is provided with over current and over voltage protection functions.
If there is over current or over voltage, this protection will function and no output.
Check 5V-STBY
Cut off connection between the
power board and signal processing
board, check the 5V-STBY
Cut off the the power
board and video board
to main board, check
it
Power board
problem
Check the supply
power +3.3V
Short circuit the pin 1 (STANDBY)
of X604 to 5V, then check the
supply power.
N606
abnormal
Pull out X604 and
check power
Check N501 and
N601
Short circuit in
a power line
Power board
problem
Abnormal
Abnormal Normal
Abnormal Normal
Check if the indicator is light
Yes No
Normal
Check the
supply power
of N606 and
crystal.
Normal Abnormal
Check the power of
N201, N601, N204
and N701, crystal and
bus.
Normal