Only For Training And Service Purposes - LG KG290 Service Manual
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Also See for KG290:
- User manual (320 pages) ,
- Quick start manual (2 pages) ,
- User manual (274 pages)
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CIRCUIT
CHECKING FLOW
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
KEY BACKLIGHT
R344
R345
R346
R347
R348
47
47
47
47
47
LD300
LD301
LD302
LD303
LD304
LD305
LED_KEY
START
Is the level at LED_KEY
Signal High?
YES
Are all LEDs
Working?
YES
Backlight will work properly.
- 87 -
4. TROUBLE SHOOTING
VBAT
R349
47
VA310
NA
VA311
EVL5M02200
VA312
EVL5M02200
NO
Check LED_KEY signal
NO
Check the soldering
each R and LED
NO
Replace or resoldering
component
LGE Internal Use Only
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