Table of Contents
Advertisement
Standard Repair Process
Error
symptom
* Please refer to the all cases which can be displayed on power off mode.
Power Off History
POWER_OFF_BY_CPU_ABNORMAL
POWER_OFF_BY_CPUCMD
POWER_OFF_BY_ABN
POWER_OFF_BY_KEYTIMEOUT
POWER_OFF_BY_ACDET
POWER_OFF_BY_5VMNT
POWER_OFF_BY_NO_POLLING
POWER_OFF_BY_REMOTE_KEY2
POWER_OFF_BY_INV_ERROR
POWER_OFF_BY_ONRF_FAIL
POWER_OFF_BY_PNWASHFAIL
POWER_OFF_BY_RESUME_FAIL
B. Power error
Off when on, off while viewing, power auto on/off
Power off by CPU Abnormal status
1. Power off (Last Cold, Last Cool, Last Warm)
Condition : When power on and checking Power on Mode, abnormality appears.
2. Power off in CPU Abnormal Case (Exception)
- Release Mode : Reboot
- Debug/Event Mode : Power off
Power off by main SoC command.
Case1 : Pipe line overflow
Case2 : reboot to suspend Fail
Power off when TV is not turned off during a certain time
Result : micom force to trigger TV power off.
Condition : When pressing power key while power on/off status, CPU does not
response within 8 seconds or call the WDT timer API.
Power off by not detecting AC (abnormal case)
Result : micom triggers TV power off
Condition : Power detect port drops to low while power on status.
Power off by not unstable AC power detect.
Result : micom check the stable power.
Condition : When AC on or DC on, stabilization check routine (Power Detect High
Check) fail after multi power on.
Power off when receiving no ack
Debug Status : Release Mode
Result : TV power off/on (Reboot)
Condition : There is no I2C response from CPU for 15 seconds.
if warm standby, power off occurs.
similar with POWER_OFF_BY_KEYTIMEOUT, but different concept.
Result : micom force to trigger TV power off within 4 seconds.
Condition : When TV power on/off, CPU does not response within 4 seconds,
and then pressing power key.
Power off by OLED module error
Result : Reboot
Condition : OLED module compensation is running but fails.
Power off by panel noise wash function fail case. (OLED)
Power off by resume fail when dc on case.
If occur the resume fail, TV will be rebooted.
Established
date
Revised date
Explanation
8
Action contents
Check & Change Main B/D
Check & Change Main B/D
Check & Change Main B/D
Check & Change Main B/D
Normal Case
Check & Change Main B/D
Check & Change Main B/D
Check & Change Main B/D
Check & Change Main B/D
Check & Change OLED
Module
Check & Change OLED
Module
Check & Change OLED
Module
Check & Change Main B/D
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
8/17
Advertisement
Table of Contents
