LG KP105 - Potentially explosive atmospheres; In aircraft; Children; Emergency calls

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 65 -
START
Check Voltage Level
Of TP1
NO
Change PCB
YES
YES
Check Voltage Level
Of TP2
Check component
R315 and Q301
Replace component
NO
NG
Check LED
component
LD301~LD306
R308~R313
NO
Replace component
Change PCB
YES
0V ~ 2.8V step
waveform
0V ~ 0.7V step
waveform
Checking Flow