Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2-5
5. Test & debug flow
YES
NO
Check the POWER PART.
NO
Check the POWER PART.
Check the
AC voltage Power PCBA (110V
or 220V).
YES
NO
Check the regulators or diode.
NO
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.
NO
Replace FLASH.
Are the DC
Voltage outputs OK? (-34V, -28V,-32V, ±12V, 3.5V,
5.6VA, 5V, 7V).
YES
Are 3.3V and
5V DC outputs normal on main
PCBA?
YES
YES
Update
FLASH successfully?
YES
Switch on the Power PCBA.
Test
A
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