Mcs Part Check; Ic503(Gd25Q80) Check - LG CJS45F Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

2. MCS PART CHECK

MCS PART CHECK
Check if voltage of CN102
Pin13, 14 is 12 VA.
Check if IC100
have 3.3 VA output.
Check if IC101
have 1.2 VA output.
X500: 24 MHz, X500: 32.768 kHz
Check the operation.
OK

3. IC503(GD25Q80) CHECK

CHECK IC500 PIN.
YES
Check
pinA12, pinB12 SF_SCK :
SF_MISO
YES
OK OK
YES
YES
YES
YES
YES
NO
voltage 3.3 VA.
Check MCS.
NO
Refer to SMPS troubleshooting.
NO
Check and change IC100.
NO
Check and change IC101.
NO
Check MCS
YES
NO
YES
OK OK
3-20
Refer to MCS troubleshooting.
Replace MCS.