LG RAT375 - Fld Display Check

3-4
2. μ-COM PART CHECK I
YES
μ-COM PART
CHECK I
Check
P-SENS CN105
Pin9,10
(3.7 VA)
.
Check
if input voltage of
IC101 is over
3.7 V.
Check both
end voltage of IC105
(KIA7027).
Refer to SMPS
troubleshooting.
NO
NO
Check voltage of
IC102(LC87Fxxx) Pin59,36.
Check the periphery of
IC105 (KIA7027).
NO
Replace IC105
(KIA7027).
NO
Check if IC105 voltage is
over 3.5 V.
OK OK
YES
YES
YES
YES
YES
No VFD
Is D925 normal?
Check or replace D925.
YES
YES
NO
Is ZD951 normal?
Is Q951 normal?
Check or replace ZD951.
Check or replace Q951.
YES
YES
NO
NO
Check or replace VFD.