Sanyo LED-42XR11F, Service Manual

Page: 22 / 36

Troubleshooting Block Diagram
1
．
Panel doesn
’
t light up.
Yes
Red
No
Blue
No
Yes
No
No
Yes
Supply with power,
check if red indicator
lights up in STANDBY
state?
Check backlight
board.
Check STANDBY
circuits on power
board.
Press key POWER
on remote control or
the unit, check
indicator.
Check if level of
X601-PIN1 on main
board is high?
Check if level of
X601-PIN5 on main
board is high?
Check power
board.
Check if 5V is supplied
to X601-PIN3 ?
Check power
control circuits on
main board.
Check power
control circuits on
main board.