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LG CM9750 Service Manual

LG CM9750
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3-29
ELECTRICAL TROUBLESHOOTING GUIDE
CD FUNCTION
Check FFC cable
to CN400, CN401.
Is Motor_open/ close OK?
(IC400 pin6, 7)
Check IC400.
MON_MPD(CN400 pin22)
About 180 mV?
Check IC501.
Check loading motor.
Check IC501.
OPU driving
(Focusing & Tracking) OK?
Check OPU.
(Pick-up module)
Is motor impedance
about 12 Ω?
IC401 pin34, 35, 36
I2S output signal OK?
Can
disc insert?
IC501 pin N1, N2, N4
I2S input signal OK?
Disc reading OK?
NO
NO
NO
NO
NO
NO
NO
NO
NO
IC401
RF & Servo signal
OK?
Focusing/
Tracking/ Sled signal
OK?
LOAD +, - OK?
YES
YES
YES
YES
YES
NO
YES
YES
YES
A
3. NO AUDIO CHECK

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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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