Key Backlight - LG KC780 Service Manual

5. TROUBLE SHOOTING
KEYPAD
KP_IN(1:4)
KP_OUT(0:4)

KEY BACKLIGHT

LGE Internal Use Only
600
R600 680
KP_IN(1)
604
R601 680
KP_IN(2)
608
R602 680
KP_IN(3)
609
R603 680
KP_IN(4)
KP_OUT(0)
R604 680
KP_OUT(1)
R605 680
KP_OUT(2)
R606 680
KP_OUT(3)
R607 680
KP_OUT(4)
TP2
LEWWS44-E
KEY_BL
LEWWS44-E
Numeric Key Matrix and LEDs on F-KEY
601 602 603
605 606 607
star sharp VOL_UP
LD600
R609
R610
LD601
_
A6
VREF1
L3
VREF2
L4
IREF2
C145
220n
C146
R126
1u
22K
TP116
PO_RESET
_WP
PWRON
KEY_BL
- 88 - Copyright © 2008 LG Electronics. Inc. All right reserved.
AF CAM
AF SHUTTER
VOL_DN
VBAT
TP3
10
10
Only for training and service purposes