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2. Troubleshooting guide
2.1. No raster
Turn-on power supply, check
if the red indicator is light in
the STANDBY?
no
Check if PIN3(5V) of XB1 on
main board is normal?
no
Check 5V-STANDBY circuit
of power supply board
yes
Press POWER button on the
unit or sensor control and
check the indicator.
Check if the PIN9,10 of XB1
on main board is high-level?
Check back light board
no
Replace NS2
blue
yes
no
Check N801 and its
peripheral circuit
21
red
Check if the PIN11 of XB1 on
main board is high-level?
yes
Check power
supply board
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