Mcs Part Check; Ic504(M24C16) Check - LG CMS4750F Service Manual

AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE

2. MCS PART CHECK

MCS PART CHECK
YES
Check if
voltage of CN501 Pin7
is 5.6 VA.
YES
Check if IC510
have 3.3 V output.
YES
Check if IC508
have 1.2 V output.
YES
X501: 32.768 kHz,
X500: 24 MHz,
Check the operation.
YES
OK

3. IC504(M24C16) CHECK

CHECK IC501 PIN.
YES
Check pinC2, pinB1
DATA : CLK
YES
OK
NO
Refer to
SMPS troubleshooting.
NO
Check and change IC510.
NO
Check and change IC508.
NO
Check MCS
voltage 3.3 VA.
YES
Check MCS.
YES
OK
3-20
NO
Refer to MCS troubleshooting.
NO
Replace MCS.