Haier HL42XR1 service manual Main board failure check, State No Sound

Page 51

9-3. Main board failure check

State: No Sound

No Sound

(All Mode)

1

I Change Source input

ail

_Fail

Re-soldering or change

IC U13

Re-soldering or change

IC U55

Fail

Re-soldering or change

IC U2

Fail

I Change the Speaker

Fail

51

Image 51

Contents Customer Model HL42XR1 Service Model HL42XR1a Contents Trouble General Guidelines Important noticeFollow the regulations and warnings Photo used in this manual Safety Check after RepairmentUsing Icons Ordering Spare PartsLocation of Controls and Components Function Description Main Board Main Board & AV BoardCN1 +3V3SB 41 D ON/OFF Exmal VBR From System Hrst Lvds Reiver Signal C+Descdion No Conntign No Conntien No Conntion No ConneXionVlcd Unit Remove the Pedestal Remove the speakerRemove the Terminal Bracket 2Remove the Back CoverRemove the keypad control Remove the power moduleRemove the one screw, take out the remote Control board Remove the Main boardExterna Equipment Connections AccessoriesChoose Your Connection External Equipment ConnectionsExternal A/V Source Setup DVI AudioVGA Video Audio R Audio -R Video L-AUDIO R Digital Set=top BoxConnecting a computer HDNll and DVI Connection Cable sample Connecting Headphones Wider Hole and BladePolarized AC Cord Plug HL26K1/HL32K1/HL32XK1/HL42XK1 Basal informationBack panel connections @ @ Oo @Setting Up Your Remote Control Function introductionMTS/SAP FRE£ CHL/SI Guide CCD ARC Favorite Circuit Diagram Block diagramMT5380 DDR1 LOOoF,lOV ----0.1oF lOOK CO4O2/SMD 71CO4O2/SMDOUT CE3ODV33 USB on UI3DUSB5V USB DPBx4 ?,5PDDoR120 o ?56?,5,5 RX0C RX0CB N RX0C NRX0 IB N RX0 I N RX02B N RX02 N RX0CB23581O13 AV33 124781O13 3V3SB 131415315 12V 1234581O15Dvdl YpbprolinDVD¥1 CNC4 HS-SA-W SI320,HAIERR187 R158,A.27 ?or ?00Dvdd II.........ALIO PC9 TJCS3A/NC£10UWAMP TestCNC C4zuF16v/ 5H7Pov,,,,pp modoi Wiring Connection DiagramHow to enter into Service Mode Measurements and AdjustmentsVideo Page Page Backlight Backlight adjust the backlight Page System Programblack White Refer To relative Simple checkPower Supply Board failure check State No Sound Main board failure checkNo Raster on Panel State= No pictureFailure Pannel failureMaybe caused by surge current and EDS Connect Badness Between Wire ElectrodeShortbetween wire and electrode Pannel and vsc connect badB/L unit Part Name Description Phenomena Failure causeScrew Sincere Forever

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