Copyright © 2009 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only
Only for training and service purposes
TROUBLESHOOTING
1. No power
(1) Symptom
1) Doesn't minute discharge at module.
2) Non does not come in into the front LED.
3) Check Off Mode.
(2)
Check follow
Is connect the Line
Filter and Power
Board Cable?
Plug in power cord
Is normal the
“Fuse” on Power Board?
Connect cable.
Is connect the Power
Board and 24P of Main
Board Cable?
Replace fuse.
Connect Cable.
After remove the cable connect to
Power Board (except the SC100
connection cable), authorizes the
AC voltage marking on manual.
When ST-BY 5V does not operate,
replace Power Board.
Yes
No
Is plug in power cord?
Yes
No
No
No
Yes
Yes
[AC Connector Value]
¾ 32LF7700 Power B/D : SC100
¾ 37/42/47LF7700 Power B/D : SC101
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