Manuals / JVC / Car Audio and Video / Car Stereo System

JVC KD-LH401 service manual Signal processing section

Models: KD-LH401

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Page 30

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5.5Signal processing section

Is the sound output from NO both channels (L, R)?

YES

Normal

No sound from either channel.

YES

Is 9V present at IC161 pin 26?

YES

Is the audio signal (including sampling output components) output to IC572 pins 1 and 7 during playback?

YES

Is the audio signal output at IC161 pins 18 to 21 during playback?

YES

Is the audio signal output at IC361/IC381 pins 12 and 13 during playback?

YES

Check the power amp. IC301.

Compare the L-ch and R-ch to locate the defective point.

Is 9V present at IC901 pin 13?

YES

Check the connection between IC901 pin 13 and IC161 pin 26.

Check IC572 and its peripheral circuits.

Check IC161 and its peripheral circuits.

Check IC361/IC381 and its peripheral circuits.

Check IC901 and its peripheral circuits.

1-30 (No.MA063)

Page 30

Image 30

JVC KD-LH401 service manual Signal processing section

Contents

SERVICE MANUAL TABLE OF CONTENTSNo.MA063 2004/4 KD-LH401TUNER SECTION SPECIFICATIONAUDIO AMPLIFIER SECTION CD PLAYER SECTIONSECTION PRECAUTION 1.1 Safety Precautions1.2 Preventing static electricity 1.4 Attention when traverse unit is decomposedPlease refer to Disassembly method in the text for the pickup unit 1.2.1 Grounding to prevent damage by static electricity1.5 Important for laser products 1.CLASS 1 LASER PRODUCT REPRODUCTION AND POSITION OF LABELSWARNING LABEL Please use enough caution not to see the beam directly or touch itSECTION SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS3.1.1 Removing the front panel assembly See Fig.1 SECTION DISASSEMBLYA B A 3.1 Main body section3.1.3 Removing the top chassis assembly See Figs.3 to Reference3.1.4 Removing the front chassis See Figs.7 and 3.1.5 Removing the mechanism control board See Fig.93.1.7 Removing the main board See Figs.11 and 3.1.6 Removing the CD mechanism assembly See Fig.10Reference Reference3.1.9 Removing the gear bracket unit See Fig.14 K L K3.1.8 Removing the rear bracket See Fig.13 ReferenceRear cover assembly P 3.1.10 Removing the front board See Figs.15 to3.2 CD Mechanism section 3.2.1 Removing the top cover See Figs.1 and Joints a3.2.2 Removing the connector board See Figs.3 to DET switch 3.2.3 Removing the DET switch See Figs.6 and2 Unsolder the DET switch wire if necessary DET switch Connector DET switch wire3.2.4 Removing the chassis unit See Figs.8 and 3.2.5 Removing the clamper assembly See Figs.10 and 3.2.6 Removing the loading / feed motor assembly See Figs.12 and Pu. shaft holder 3.2.7 Removing the pickup unit See Figs.14 to3.2.8 Reattaching the pickup unit See Figs.14 to Feed rack3.2.10 Removing the top plate assembly See Fig.21 3.2.9 Removing the trigger arm See Figs.19 and3.2.11 Removing the mode sw. / select lock arm See Figs.22 and Select lockarm spring 3.2.12 Reassembling the mode sw. / select lock arm See Figs.24 to REFERENCE3.2.14 Reattaching the Select arm R / link plate See Figs.29 and 3.2.13 Removing the select arm R / link plate See Figs.27 andREFERENCE REFERENCE3.2.15 Removing the loading roller assembly See Figs.31 to 3.2.16 Removing the loading gear 5, 6 and 7 See Figs.35 and 3.2.17 Removing the gears See Figs.37 to 3.2.18 Removing the turn table / spindle motor See Figs.41 and „ Standard volume position SECTION ADJUSTMENT4.1 Adjustment method „ Test instruments required for adjustment „ How to connect the extension cable for adjusting5.2 Focus section 5.3 Spindle section SECTION TROUBLESHOOTING5.1 Feed section 5.4 Tracking section5.5 Signal processing section Is RF output Page No.MA0631-33 No.MA063 VICTOR COMPANY OF JAPAN, LIMITEDStandard schematic diagrams ContentsBlock diagram Printed circuit boardsSafety precaution TU.L TU.R Block diagramBATTERY S600 to S617SHEET Standard schematic diagramsMain amplifier section To CN50147K SHEETCD servo control section SHEETTo CN702 SHEET LCD & Key control section SHEETTo CN701 SHEET Forward side Printed circuit boardsMain board Reverse sideFront board Front boardMecha control board Mecha control boardM E M O No.MA063SCH VICTOR COMPANY OF JAPAN, LIMITEDPrinted in Japan Electrical parts list Block No.01~03 Exploded view of general assembly and parts list Block No.M1CD mechanism assembly and parts list Block No.MB Packing materials and accessories parts list Block No.M340 39 Exploded view of general assembly and parts listBlock No. M 1 M M 20 21 C1 M M General Assembly Block No. M1MMCD mechanism assembly and parts list TN-2001-1013Block No. M B M M CD mechanism Block No. MBMMElectrical parts list Main boardBlock No Symbol No. Part No Part Name Front board Block NoPart Name Micon control board Block NoROTARY ENCODER Part Name Part Name MEMO Packing materials and accessories parts list Block NoPacking and Accessories Block No. M3MMENGLISH DEUTSCH CD RECEIVERCD-RECEIVER RECEPTEUR CD CD-RECEIVER BEDIENUNGSANLEITUNG MANUEL D’INSTRUCTIONS GEBRUIKSAANWIJZINGENGLISH How to reset your unitIMPORTANT FOR LASER PRODUCTS CAUTION on Volume SettingSOUND ADJUSTMENTS CONTENTSMAINTENANCE TROUBLESHOOTINGIllumination Navigation for easy operations LOCATION OF THE BUTTONSControl panel w er t yRemote controller ENGLISH1. Remove the battery holder Preparing the remote controllerInstalling the battery 3. Return the battery holder3 Adjust the volume BASIC OPERATIONSTurning on the power 1 Turn on the powerTo turn off the power Canceling the display demonstrationTo drop the volume in a moment PSM settings3 Adjust the hour 4 Set the minute Setting the clock6 Finish the setting ENGLISHSearching for a station automatically Auto search RADIO OPERATIONSListening to the radio ENGLISH1 Select the band FM1 - 3, AM Searching for a station manually Manual searchENGLISH 3 Tune in to a station you want while “Manual Search” is flashingStoring stations in memory FM station automatic preset SSMWhen an FM stereo broadcast is hard to receive 2 Start automatic presetManual preset ENGLISH2 Tune in to a station in this example, of 92.5 MHz Selecting a preset station using the preset station list Tuning in to a preset stationSelecting a preset station directly 2 Select the number 1 - 6 for the preset station you wantENGLISH Changing the display patternWhen receiving an AM or non FM RDS stationTracing the same programme automatically Network-Tracking Reception RDS OPERATIONSWhat you can do with RDS To use Network-Tracking ReceptionENGLISH Using TA Standby Reception5 Finish the setting 3 Select “AF-Regn’l” alternative frequency/regionalization receptionTo set PTY Standby Reception Using PTY Standby ReceptionTo select your favorite PTY code for PTY Standby Reception 4 Finish the settingENGLISH Searching for your favorite programmeTo store your favorite programme types 2 Select one of the twenty-nine PTY codes. See pageyou can show the list of your preset PTY To search for your favorite programmetype ENGLISHAutomatic clock adjustment Other convenient RDS functions and adjustmentsSetting the TA volume level Automatic selection of the station when using the number buttonsPTY codes ENGLISHThe same programme can be received on different frequencies Playing a disc DISC OPERATIONSAbout MP3 and WMA discs ENGLISHWMA or MP3 indicator lights up depending on the first detected track To stop play and eject the discDisplay indications when inserting an audio You can eject the disc even when the unit is turned offENGLISH What is ImageLink?To activate ImageLink, follow the procedure below ImageLink will not work in the following casesTo go to the next or previous tracks Locating a track or aparticular portion on a disc To go to a track quicklyTo select a particular track in a folder, press ENGLISHYou cannot directly select a folder with a number greater than If the folder does not contain any MP3 or WMA tracks, it is skippedSelecting a folder and start playback Selecting a folder and a track using the name listsSelecting a track and start playback ENGLISHTo play back tracks repeatedly Repeat Play Selecting the playback modesTo play back tracks at random Random Play To cancel random play, select “Random Off” byTo cancel the prohibition and unlock the disc Prohibiting disc ejectionTo play back only intros Intro Scan To cancel intro scan, select “Intro Off” bythe track indicator lights up When the disc title/performer is shown, thedisc indicator lights up. When the track title is indicator appear on the display instead of the folder2 Make adjustments SOUND ADJUSTMENTSAdjusting the sound 1 Select the item you want to adjustENGLISH Selecting preset sound modes iEQ intelligent equalizerTo adjust the input level of each source -Vol Adj 1 Press SEL select oncePreset equalizing values Sound modes preset frequency level settingsTo cancel the sound mode, select “FLAT” in ENGLISH5 Store the adjustment you made Storing your own sound modes 4 Make adjustments as you like2 Select the sound mode you want to adjust 3 Enter the sound adjustment modeMeter Selecting the display themeView ShakeImport the images Install / Start the programGRAPHIC DISPLAYS Retouch and edit the images1 Open the control panel Downloading images and animationsENGLISH 3 Press M MODE after the disc is detectedIf you want to cancel the procedure If you want to cancel the procedureYou can assign your own names when editing a CD-R ENGLISH8 Show the name list of the files included in the selected folder 12 Finish the download procedureENGLISH 9 Select highlight a file you want to downloadtime,” and “Movie” Deleting unwanted filesTo delete all the stored files at a time To delete the files stored for “Opening,”3 again To delete the stored files for “Picture” one by one5 To delete the file stored in “Opening,” ∞ down repeatedlyActivating the animations stored for opening and ending screens Activating the graphic screen using either picture or movieActivating the downloaded images and animations 5 Finish the settingTo cancel all graphic displays, select “Off” in step 4 Finish the setting4 Select a file you want 5 Finish the setting Selecting a still image for graphic display-User PictureChanging the general settings 3 Select the PSM item you want to Basic ProcedureOTHER MAIN FUNCTIONS adjustENGLISH Preferred Setting Mode PSM itemsFactory-preset IndicationsDisplayed only when DAB tuner is connected TA VolumeDisplayed only when “DAB AF” is set to “Off.” Not displayed when the current source is “CD-CH” or “LINE IN.”To select the display illumination pattern -LCD Type To adjust the display contrast level -ContrastTo show the graphics on the display -Graphics To turn the tag display on or off-TagTo select the amplifier gain control -Amp.Gain To change the FM tuner selectivity -IF FilterTo select the external component to use -Ext Input when the next track starts playing3 Press ¢ or 4 to select “Dimmer.” 6 Set the timer Selecting the dimmer mode5 Select “From- To” to set the timer for the dimmer mode 7 Finish the setting6 Finish the setting Changing the display colorSetting the desired color for each source ENGLISH5 Select “Day” or “Night” which you want to make an adjustment for Creating your own color-User4 Select the user color adjustment screen 6 Adjust the selected user color7 Finish the procedure while the last selected character is flashing Assigning names to the sourcesTo erase the entered characters ENGLISHENGLISH Changing the control panel angle1 Press and hold angle until the angle adjustment screen appears The control panel angles changes as followsAttaching the control panel Detaching the control panelDetaching the control panel ENGLISHENGLISH CD CHANGER OPERATIONSPlaying discs Select the CD changer CD-CHTo fast-forward or reverse the track To change the display patternTo go to a particular disc directly To go to the next or previous tracksENGLISH To skip to the next or previous folder only for MP3 discsHow to go to the desired track quickly To go to a track quickly1 While playing a disc, press and hold Selecting a disc/folder/track using the name listsENGLISH 5 up or ∞ down until a disc name list appears on the displayTo play back tracks at random Random Play Selecting the playback modesENGLISH To play back tracks repeatedly Repeat PlayTo play back only intros Intro Scan To cancel repeat play, select “Repeat Off” byTo cancel intro scan, select “Intro Off” by ModePlaying an external component EXTERNAL COMPONENT OPERATIONSChanging the display pattern 3 Adjust the volume 4 Adjust the sound as you want. See pages 32DAB TUNER OPERATIONS Tuning in to an ensemble and one of the servicesWhat is DAB system? ENGLISH4 Select a service either primary or secondary you want to listen to When surrounding noises interfere your listening while drivingTo tune in to a particular ensemble without searching ENGLISH4 Select a service of the ensemble you want to listen to Storing DAB services in memoryTo restore the FM/AM tuner To cancel the DRC effect, select “DRC Off.”Selecting a preset service using the preset service list serviceTuning in to a preset DAB preset DAB service primary youRoad Traffic News Standby Reception TA Standby Reception Using Announcement Standby ReceptionWhat you can do more with DAB for Announcement Standby ReceptionAnnouncement type To activate Announcement Standby ReceptionHow Announcement Standby Reception works ENGLISHUsing PTY Standby Reception Searching for your favorite serviceTo use Alternative Reception To store your favorite programme service types, see pages 19 and1 TEXT indicator implies the current service received is providing DLS Dynamic Label Segment-DAB radio text information Changing the display patternENGLISH ENGLISH TROUBLESHOOTINGSymptoms CausesCauses SymptomsENGLISH RemediesENGLISH Available charactersSymptoms CausesTo keep discs clean MAINTENANCEHow to handle discs When playing a CD-R or CD-RWTUNER SECTION SPECIFICATIONSAUDIO AMPLIFIER SECTION CD PLAYER SECTIONHaving TROUBLE with operation? Please reset your unitRefer to page of How to reset your unit Bitte setzen Sie Ihr Gerät zurückINSTALLATIE INBOUW IN INSTALLATIONINSTALLATION MONTAGE KD-LH401EN CAS DE DIFFICULTES TROUBLESHOOTINGFEHLERSUCHE ELECTRICAL CONNECTIONSENGLISH FRANÇAISNEDERLANDS DEUTSCHCAUTION / VORSICHT / PRECAUTION / LET OP Amplifier / Verstärker / Amplificateur / VersterkerSubwoofer / Subwoofer / Caisson de grave / Subwoofer For amplifier only