CM9730

LG CM9730 Service Manual

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3-2

ONE POINT REPAIR GUIDE

1. NO POWER

If the unit doesn’t work by no power problem, repair the set according to the following

guide.

1-1. FUSE / BRIDGE DIODE / THERMISTOR

1-1-1. Solution

Please check and replace F901, BD901, TH900, TH901, TH902 on SMPS board.

1-1-2. How to troubleshoot (Countermeasure)

1) Check if the fuse F901 is open or short-circuit.

2) Check if the bridge diode BD901 is short-circuit by over current with a digital multi meter.

3) Check if the NTC thermistor TH900 ~ TH902 is normal or open.

1-1-3. Service hint (Any picture / Remark)

< F901 >

If F901 is not short-circuit,

replace it with a same

speciﬁ cations one.

< TH900 ~ TH902 >

If TH900 ~ TH902 is open,

replace it with a new one.

< BD901 >

If BD901 is short-circuit,

replace it with a new one.

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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.