LG CM9730 Service Manual

3-26
ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER SUPPLY ON SMPS BOARD
YES
YES
YES
YES
YES
No output 5.6 VA
No 12 V
Power line of MAIN PCB is short.
Replace F901 (same fuse).
Check or replace D962, D963.
D960, D961 normal?
Replace BD901.
Check P_CTL from μ-com.
Check or replace IC951.
Or check line of MAIN PCB is short or not.
Check or replace D960, D961.
NO
NO
NO
NO
NO
F901 normal?
Is the
VCC 13 VA supplied to IC951
Pin1?
Is the VCC
(11 V ~ 25 V) supplied to IC901
Pin4?
BD901 normal?
Is there
‘H’ signal at IC951
Pin4?

LG CM9730 Specifications

General

Type	-
Cassette deck	No
Product color	Black
Disc loading type	Tray
Optical disc player	Yes
Impedance	75 Ω
RMS rated power	2300 W
Number of speakers	2
Power source	AC
Input voltage	220-230 V
Input frequency	50 - 60 Hz
Power consumption (standby)	1 W
Power consumption (typical)	180 W
Playback disc formats	CD audio
Audio formats supported	MP3, WMA
FM band range	87.5 - 108 MHz
Supported radio bands	AM, FM, MW
Preset stations quantity	50
Display type	LCD
Speaker depth	500 mm
Speaker width	520 mm
Speaker height	720 mm
Apple docking compatibility	Not supported
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.

Weight and Dimensions

Main unit dimensions (WxDxH)	542 x 421 x 310 mm