Power On Trouble; Only For Training And Service Purposes - LG KC780 Service Manual

5. TROUBLE SHOOTING

5.2 Power on Trouble

Check Points
-Battery Voltage( Need to over 3.35V)
-Power-On Key detection (PWRON signal)
RPWRON_EN
RPWRON
END_KEY_IN
LGE Internal Use Only
END_KEY
VA713
ICVL0505101V150FR
Remote Power On
R408
3.3M
R410
C405 3.3M
2.2u
ON
R411
1
END_KEY
10K
END
VBAT
END
R702 150
VRTC_2V0
3
Q401
1
2SC5663
2
3
Q403
1
2SC5663
2
END_KEY_IN
KP_IN(6)
3
Q402
2SC5663
2
KP_OUT(0)
- 72 - Copyright © 2008 LG Electronics. Inc. All right reserved.
TP1
PWRON
END_

Only for training and service purposes