Vkk Check; Micom Part Check I - LG MCD23 Service Manual

2. P-SENS
P-SENS
YES
Check
NO
the PIN6 of CN1
if DC V is over
5.6V
YES
OK

4. MICOM PART CHECK I

MICOM PART
HECK I
YES
NO
Check P-SENS
(P7904_PIN6)
YES
Check both
NO
End voltage of IC101
(KIA7042)
YES
Check voltage of
IC100(LC87Fxxx)PIN4
YES
OK
LGE Internal Use Only
Check power circuit
Troubleshooting.
Refer to SMPS
troubleshooting.
Check
NO
If input voltage of
IC101 is over 5V
YES
Check if IC101 of output
voltage is over4.3V
YES
OK
3-2
3. VKK PART CHECK

VKK CHECK

YES
Check
the PIN3 o CN1
if DC V is over
-28V.
YES
OK
Check the
Periphery of IC101
(KIA7042)
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Only for training and service purposes
NO
Check power circuit
Troubleshooting.
NO
Replace IC101
(KIA7042)