Only For Training And Service Purposes - LG KP110 Service Manual

CIRCUIT
KEY BACKLIGHT
nKEY_BACKLIGHT
CHECKING FLOW
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

EDLH0004501
LEBB-S14E
LD201
LEBB-S14E
LD202
LEBB-S14E
LD203
LEBB-S14E
LD204
LEBB-S14E
LD205
LEBB-S14E
LD206
START
NO
Check voltage C239,
C240 = 3.7V
YES
NO
Check soldering of
R220~222,R225,R228,R229
YES
NO
Check the soldering
Of LEDs
YES
Backlight will work properly.
- 61 -
4. TROUBLE SHOOTING
VBAT VBAT
R220 100ohm
R221 100ohm
R222 100ohm
100ohm
R225
100ohm
R228
100ohm
R229
C240
C239
0.1u
0.1u
ECZH0003103
ECZH0003103
(10V,K,X7R)
Check U101
Resolder the components
Resolder the components
TP2
TP1
LGE Internal Use Only