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LG CM9750 Service Manual

LG CM9750
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3-28
ELECTRICAL TROUBLESHOOTING GUIDE
2. SYSTEM PART
Power on.
System part OK.
Check FFC cable.
Check SMPS board.
Check FFC cable.
Check MAIN board.
Check SMPS board.
Replace VFD301.FL+/- & VKK voltage OK?
Replace LED
(LD311, LD313),
(LD301, LD303)
Check MAIN board.
“HELLO”
Display on MLD
OK?
Top LED
(LD311, LD313),
(LD301, LD303)
Turn on?
When turn
the volume, count is
change?
NO
NO
NO
NO
NO
NO
NO
NO
NO
CN605
cable connection
OK?
CN605 pin24
+12 V OK?
Check
CN605 pin5, 6
I2C data OK?
CN605
pin8, 9, 10 data signal
OK?
CN605
pin14, 15, 16, 24 power
OK?
YES
YES
YES
YES
YES
YES
YES
YES

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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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