LG MCV903 Series Service Manual

3-17
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
NO
CN710.2 PIN LOW→OFF
HIGH→ON
For each IC 701 Check the 3.20PIN
+65V input power
Check the 3.20PIN -65V input power
IC100. 51PIN
LOW→OFF
HIGH→ON
Check & replace the related
part
YES
NO
Check CN704
1.2 PIN +65 ,7.8PIN- 65
operation
YES
YES
Replace the SMPS
Troubleshooting
NO
Check the
power at both
terminals of R744,757 +65
Check the power at both
terminals of
R769,719 -65
YES
Check the power at both
terminals of the said part
NO
Check the
CN704 9PIN +9V, 10PIN
-9V power
YES
YES
Replace the SMPS
Troubleshooting
NO
Check the
power at both
terminals of L754 +9V,
L753 -9V
YES
Check the power at both
terminals of the said part
NO
Replace the related part
NO
Replace the related
part
16. POWER AMP PART CHECK

LG MCV903 Series Specifications

General

Brand	LG
Model	MCV903 Series
Category	Stereo System
Language	English