LG CM4540 Service Manual

2. MCS PART CHECK
MCS PART CHECK
Refer to
SMPS troubleshooting.
NO
Check if
voltage of CN501 Pin7
is 5.6 VA.
Check and change IC510.
Check and change IC508.
NO
NO
Check if IC510
have 3.3 V output.
Check if IC508
have 1.2 V output.
X501: 32.768 kHz,
X500: 24 MHz,
Check the operation.
OK
YES
YES
YES
YES
YES
3. IC504(M24C16) CHECK
CHECK IC501 PIN.
Refer to MCS troubleshooting.
NO
Check pinC2, pinB1
DATA : CLK
Replace MCS.
NO
YES
Check MCS
voltage 3.3 VA.
Check MCS.
YES
OK OK
YES
YES
NO
3-20
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE

LG CM4540 Specifications

General

Brand	LG
Model	CM4540
Category	Stereo System
Language	English