Sanyo LCD-22XR7SN, Service Manual

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