LG CM8460 User Manual

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3-4

ONE POINT REPAIR GUIDE

3. NO BOOTING WHEN POWER ON THE SET

The set doesn’t work when press the power button on the FRONT board or the remote control.

3-1. IC501

3-1-1. Solution

Replace IC501 on MAIN board.

3-1-2. How to troubleshoot (Countermeasure)

1) Check the 5.6 VA (CN106) and DVCC 3.3 V (IC505) in standby mode.

 If there is no 5.6 VA, check the SMPS and if doesn’t appear 3.3 V, check IC505.

2) Check 5.6 VA, +12 V, DVCC_5 and VCC_3.3V when power on the set.

 If the set doesn’t work regardless of what the KEY1 changes HIGH to LOW.

while pressing the power button. X500 and X501 work normally but, if you can not power on the set,

replace the IC501 with a new one on the MAIN board.

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

< MAIN board top view >

< MAIN board bottom view >

X500

(24 MHz)

X501

(32.768 kHz)

KEY2

(R526)

PWR_CTRL

R522

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General

Type	Home audio mini system
Cassette deck	-
Product color	Black
Optical disc player	Yes
Number of optical discs	1 discs
RMS rated power	2750 W
Number of speakers	2
Number of subwoofers	1
Subwoofer driver diameter (imperial)	10 \
Power source	AC
Power consumption (standby)	0.5 W
Power consumption (typical)	250 W
Supported radio bands	FM
Audio formats supported	MP3, WMA
Headphone connectivity	3.5 mm
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.
Apple docking compatibility	Not supported

Weight and Dimensions