Test & Debug Flow - LG HT806TGW Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
8. TEST & DEBUG FLOW
TEST.
Check the
AC voltage Power PCBA (110 V
or 220 V).
Switch on the Power PCBA.
Are the
DC Voltage outputs OK?
(from the SMPS).
Are 3.7 V, 6.3 V
and 12 V DC outputs normal on main
PCBA?
Update
FLASH successfully?
A
YES
YES
YES
YES
YES
YES
NO
Check the POWER PART.
NO
Check the POWER PART.
NO
Check the regulators or diode.
1. Check 27 MHz system clock.
NO
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD, RWR.
4. Check FLASH Memory related circuit.
2-48
NO
Replace FLASH.