P-Sens; Vkk Check; Micom Part Check I - LG XC102 Service Manual

2. P-SENS

P-SENS
Check
the PIN6 of P9702
If DC V is over 5.6V
OK

3. VKK CHECK

VKK check
Check
the PIN3 of P9702
If DC V is over -28V ±2
OK

4. MICOM PART CHECK I

MICOM part check I
YES
Check P-SENS
(P7904)_PIN6.
YES
Check both
end voltage of IC101
(KIA7042).
YES
Check voltage of IC100
78KO/KF2_PIN1.
YES
OK
YES
YES
YES
YES
NO
Refer to
SMPS troubleshooting.
Check
NO
if input voltage of
IC101(KIA7042) is
over 5V.
YES
Check if IC101(KIA7042) of
output voltage is over 4.3V.
YES
OK
NO
Check power circuit Trouble shooting
NO
Check power circuit Trouble shooting
NO
periphery of IC101
3-2
Check the
NO
(KIA7042).
YES
Replace IC101
(KIA7042).