LG MCD112 - P-Sens; Vkk Check; Micom Part Check I

3-2
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2. P-SENS
P-SENS
YES
YES
Check
the PIN6 of P9702
If DC V is over 5.6V
Check power circuit Trouble shooting
NO
OK
3. VKK CHECK
VKK check
YES
YES
Check
the PIN3 of P9702
If DC V is over -28V ±2
Check power circuit Trouble shooting
NO
OK
4. MICOM PART CHECK I
MICOM part check I
OK OK
YES
YES
Check P-SENS
(P7904)_PIN6.
NO
Refer to
SMPS troubleshooting.
YES
YES
YES
Check both
end voltage of IC101
(KIA7042).
Check
if input voltage of
IC101(KIA7042) is
over 5V.
YES
NO
Check the
periphery of IC101
(KIA7042).
NO
YES
Check if IC101(KIA7042) of
output voltage is over 4.3V.
Check voltage of IC100
78KO/KF2_PIN1.
NO
Replace IC101
(KIA7042).