Only For Training And Service Purposes - LG KP210 Service Manual

4. TROUBLE SHOOTING
CIRCUIT
KEY BACKLIGHT
R206
R207 R208
47 47 47
LD200 LD201 LD202
CHECKING FLOW
LGE Internal Use Only
VBAT
VA201 VA202
R209 R210 R211
47
47 47
LD203 LD204 LD205
KEY_BACKLIGHT
START
Is the level Period at VA203
High Duty(30%)?
YES
Is the level Period at VA203
Low Duty(70%)?
YES
Are all LEDs
Working?
YES
Backlight will work properly.
LD206 LD207 LD208
VA203
EVL5M02200
NO
Check U102
NO
Check U102
NO
Check the soldering
each R and LED
NO
Replace or resolder
component
Copyright © 2008 LG Electronics. Inc. All right reserved.
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LD209 LD210 LD211
TP1

Only for training and service purposes