LG CM9730 Service Manual

3-25
ONE POINT REPAIR GUIDE
9. SPEAKER NO AUDIO
Speaker No Audio
9-1. AMP IC
9-1-1. Solution
Please check and replace the component on MAIN board.
9-1-2. How to troubleshoot (Countermeasure)
1) Check supply voltage of AMP(CN700, CN701) & PWM signal
Normal Supply voltage and signal  Check AMP IC.
Poor supply voltage  Check SMPS Assy.
Poor signal  Check PWM IC.
2) Check CSD of FET driver IC (IRS2092 : EAN60778301).
CSD has about 5 V on normal state.
When AMP has problem, CSD is LOW state or keep change LOW to HIGH.
9-1-3. Service hint (Any picture / Remark)
ju ^WWGw puGXSYGaGT[W}
wpuGZS[GaGwnuk
wpuG\S]GaGR[W}
ju ^WWGw puGXSYGaGR[W}
wpuGZS[GaGwnuk
wpuG\S]GaGT[W}
J\GwpuGGpjGTeGjzk

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