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T
Trou
Trouble shooting
ble hooting
1. No raster
Turn on power supply, check
if the red indicator is light in
the STANDBY?
no
Check if PIN3 (5V) of XB20
on the main board is normal?
no
Check STANDBY circuit of
power supply board
yes
Press POWER button in the
unit or sensor control and
check the indicator.
Check if the PIN3 of XS14 on
the main board is high-level?
no
Replace NS2
Check
backlight board
18
red
blue
yes
no
no
the
Replace
NS14
Check if XS15 pin 11 on main
board is high-level?
yes
Check power
supply board
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