Sanyo LCD-19XR7, Service Manual

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6
3. Troubleshooting guide
3.1. No raster
Turn-on power supply, check
if the red indicator is light in
the STANDBY?
Check if XB1 PIN3(5V) of
main board is normal?
Check STANDBY circuit of
power supply board
Press POWER button in the
unit or sensor control and
check the indicator.
Check if the PIN9,10 of XB1
in main board is high-level?
Check if the PIN11 of XB1 in
main board is low-level?
Check power
supply board
Check back light board
yes
no
no
red
blue
no
yes
Replace NS2
no
yes
Check N801 and its
peripheral circuit