TEST
Check the POWER PART
No
Yes
No
Yes
No
No
Yes
Yes
Check the POWER PART
Check the regulators or diode.
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD,
RWR.
4. Check FLASH Memory related circuit.
Check the
AC Voltage
Power PCBA (110V
or 220V)
Switch on the Power PCBA
Are the
DC Voltage outputs
OK? (-35V, -30V, -33V, ±12V,
3.5V, 5.6V, 5V, ±12V, 5.6V,
3.3V, 5V, 7V,
32.5V)
Are 3.3V and 5V DC
outputs normal on main
PCBA?
Update
FLASH
successfully?
Replace FLASH
A
3-3
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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