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LG CM9750 Service Manual

LG CM9750
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3-25
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.
Is D960/ D961 normal?
Replace BD901 or BD902.
Check P_CTL from μ-com.
Check and replace IC951.
Or check line of
MAIN PCB is short or not.
Check or replace D960/ D961.
NO
NO
NO
NO
NO
Is the F901 normal?
Is the
VCC 13 VA supplied to IC951
pin2?
Is the VCC
(11 V ~ 25 V) supplied to IC901
pin4?
Is BD901 or BD902 normal?
Is there
‘H’ signal at IC951
pin1?

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LG CM9750 Specifications

General IconGeneral
Type-
Cassette deckNo
Product colorBlack
Number of decks1 deck(s)
Disc loading typeTray
Optical disc playerYes
Number of optical discs1 discs
Speaker type3-way
RMS rated power- W
Woofer diameter304.8 mm
Tweeter diameter25.4 mm
Number of speakers2
Mid-range driver diameter165.1 mm
Subwoofer driver diameter (imperial)12 \
Tuner typeDigital
FM band range87.5 - 108 MHz
Supported radio bandsFM
Headphone connectivity3.5 mm
USB 2.0 ports quantityUSB 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.
Microphone connectivity6.3 mm
Apple docking compatibilityNot supported
Disc types supportedCD, CD-R, CD-RW
Playback disc formatsCD audio
Audio formats supportedMP3, WMA
Volume controlRotary
Equalizer modesBass, Classic, Jazz, Pop, Rock
Power sourceAC
Weight and Dimensions IconWeight and Dimensions
Main unit weight6600 g
Main unit dimensions (WxDxH)450 x 355 x 160 mm

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