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JVC KD-LH401 service manual Is RF output

Models: KD-LH401

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Is RF output

5.6Maintenance of laser pickup

(1)Cleaning the pick up lens

Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.

(2)Life of the laser diode

When the life of the laser diode has expired, the following symptoms will appear.

•The level of RF output (EFM output: amplitude of eye pattern) will be low.

	Is RF output	NO
		Replace it.
	1.3 0.4Vp-p?

YES

OK

(3)Semi-fixed resistor on the APC PC board

The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor.

If the laser power is lower than the specified value, the la- ser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged due to excessive current.

5.7Replacement of laser pickup

Turn of the power switch and, disconnect the power cord.

Replace the pickup with a normal one. (Refer

to "Removing the pickup unit" on the previous page.)

Plug the power cord in, and turn the power on. At this time, check that the laser emits for about seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at

RF test point.

Finish.

(No.MA063)1-31

Image 31

JVC KD-LH401 service manual Is RF output

Contents

KD-LH401 TABLE OF CONTENTSNo.MA063 2004/4 SERVICE MANUALCD PLAYER SECTION SPECIFICATIONAUDIO AMPLIFIER SECTION TUNER SECTION1.1 Safety Precautions SECTION PRECAUTION1.2.1 Grounding to prevent damage by static electricity 1.4 Attention when traverse unit is decomposedPlease refer to Disassembly method in the text for the pickup unit 1.2 Preventing static electricityPlease use enough caution not to see the beam directly or touch it REPRODUCTION AND POSITION OF LABELSWARNING LABEL 1.5 Important for laser products 1.CLASS 1 LASER PRODUCTThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS SECTION SPECIFIC SERVICE INSTRUCTIONS3.1 Main body section SECTION DISASSEMBLYA B A 3.1.1 Removing the front panel assembly See Fig.1Reference 3.1.3 Removing the top chassis assembly See Figs.3 to3.1.5 Removing the mechanism control board See Fig.9 3.1.4 Removing the front chassis See Figs.7 andReference 3.1.6 Removing the CD mechanism assembly See Fig.10Reference 3.1.7 Removing the main board See Figs.11 andReference K L K3.1.8 Removing the rear bracket See Fig.13 3.1.9 Removing the gear bracket unit See Fig.143.1.10 Removing the front board See Figs.15 to Rear cover assembly PJoints a 3.2 CD Mechanism section 3.2.1 Removing the top cover See Figs.1 and3.2.2 Removing the connector board See Figs.3 to DET switch wire 3.2.3 Removing the DET switch See Figs.6 and2 Unsolder the DET switch wire if necessary DET switch Connector DET switch3.2.4 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 Feed rack 3.2.7 Removing the pickup unit See Figs.14 to3.2.8 Reattaching the pickup unit See Figs.14 to Pu. shaft holder3.2.9 Removing the trigger arm See Figs.19 and 3.2.10 Removing the top plate assembly See Fig.21Select lock 3.2.11 Removing the mode sw. / select lock arm See Figs.22 andarm spring REFERENCE 3.2.12 Reassembling the mode sw. / select lock arm See Figs.24 toREFERENCE 3.2.13 Removing the select arm R / link plate See Figs.27 andREFERENCE 3.2.14 Reattaching the Select arm R / link plate See Figs.29 and3.2.15 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 „ How to connect the extension cable for adjusting SECTION ADJUSTMENT4.1 Adjustment method „ Test instruments required for adjustment „ Standard volume position5.4 Tracking section SECTION TROUBLESHOOTING5.1 Feed section 5.2 Focus section 5.3 Spindle section5.5 Signal processing section Is RF output Page No.MA0631-33 VICTOR COMPANY OF JAPAN, LIMITED No.MA063Printed circuit boards ContentsBlock diagram Standard schematic diagramsSafety precaution S600 to S617 Block diagramBATTERY TU.L TU.RTo CN50147K SHEET Standard schematic diagramsMain amplifier section SHEETSHEET CD servo control sectionTo CN702 SHEET SHEET LCD & Key control sectionTo CN701 SHEET Reverse side Printed circuit boardsMain board Forward sideMecha control board Front boardMecha control board Front boardM E M O VICTOR COMPANY OF JAPAN, LIMITED No.MA063SCHPrinted in Japan Packing materials and accessories parts list Block No.M3 Exploded view of general assembly and parts list Block No.M1CD mechanism assembly and parts list Block No.MB Electrical parts list Block No.01~0320 21 C Exploded view of general assembly and parts listBlock No. M 1 M M 40 391 M M Block No. M1MM General AssemblyTN-2001-1013 CD mechanism assembly and parts listBlock No. M B M M Block No. MBMM CD mechanismMain board Electrical parts listBlock No Symbol No. Part No Part Name Block No Front boardPart Name Block No Micon control boardROTARY ENCODER Part Name Part Name MEMO Block No Packing materials and accessories parts listBlock No. M3MM Packing and AccessoriesBEDIENUNGSANLEITUNG MANUEL D’INSTRUCTIONS GEBRUIKSAANWIJZING CD RECEIVERCD-RECEIVER RECEPTEUR CD CD-RECEIVER ENGLISH DEUTSCHCAUTION on Volume Setting How to reset your unitIMPORTANT FOR LASER PRODUCTS ENGLISHTROUBLESHOOTING CONTENTSMAINTENANCE SOUND ADJUSTMENTSw er t y LOCATION OF THE BUTTONSControl panel Illumination Navigation for easy operationsENGLISH Remote controller3. Return the battery holder Preparing the remote controllerInstalling the battery 1. Remove the battery holder1 Turn on the power BASIC OPERATIONSTurning on the power 3 Adjust the volumePSM settings Canceling the display demonstrationTo drop the volume in a moment To turn off the powerENGLISH Setting the clock6 Finish the setting 3 Adjust the hour 4 Set the minuteENGLISH RADIO OPERATIONSListening to the radio Searching for a station automatically Auto search3 Tune in to a station you want while “Manual Search” is flashing Searching for a station manually Manual searchENGLISH 1 Select the band FM1 - 3, AM2 Start automatic preset FM station automatic preset SSMWhen an FM stereo broadcast is hard to receive Storing stations in memoryENGLISH Manual preset2 Tune in to a station in this example, of 92.5 MHz 2 Select the number 1 - 6 for the preset station you want Tuning in to a preset stationSelecting a preset station directly Selecting a preset station using the preset station liststation Changing the display patternWhen receiving an AM or non FM RDS ENGLISHTo use Network-Tracking Reception RDS OPERATIONSWhat you can do with RDS Tracing the same programme automatically Network-Tracking Reception3 Select “AF-Regn’l” alternative frequency/regionalization reception Using TA Standby Reception5 Finish the setting ENGLISH4 Finish the setting Using PTY Standby ReceptionTo select your favorite PTY code for PTY Standby Reception To set PTY Standby Reception2 Select one of the twenty-nine PTY codes. See page Searching for your favorite programmeTo store your favorite programme types ENGLISHENGLISH To search for your favorite programmetype you can show the list of your preset PTYAutomatic selection of the station when using the number buttons Other convenient RDS functions and adjustmentsSetting the TA volume level Automatic clock adjustmentENGLISH PTY codesThe same programme can be received on different frequencies ENGLISH DISC OPERATIONSAbout MP3 and WMA discs Playing a discYou can eject the disc even when the unit is turned off To stop play and eject the discDisplay indications when inserting an audio WMA or MP3 indicator lights up depending on the first detected trackImageLink will not work in the following cases What is ImageLink?To activate ImageLink, follow the procedure below ENGLISHTo go to a track quickly Locating a track or aparticular portion on a disc To go to the next or previous tracksIf the folder does not contain any MP3 or WMA tracks, it is skipped ENGLISHYou cannot directly select a folder with a number greater than To select a particular track in a folder, pressENGLISH Selecting a folder and a track using the name listsSelecting a track and start playback Selecting a folder and start playbackTo cancel random play, select “Random Off” by Selecting the playback modesTo play back tracks at random Random Play To play back tracks repeatedly Repeat PlayTo cancel intro scan, select “Intro Off” by Prohibiting disc ejectionTo play back only intros Intro Scan To cancel the prohibition and unlock the discindicator appear on the display instead of the folder When the disc title/performer is shown, thedisc indicator lights up. When the track title is the track indicator lights up1 Select the item you want to adjust SOUND ADJUSTMENTSAdjusting the sound 2 Make adjustments1 Press SEL select once Selecting preset sound modes iEQ intelligent equalizerTo adjust the input level of each source -Vol Adj ENGLISHENGLISH Sound modes preset frequency level settingsTo cancel the sound mode, select “FLAT” in Preset equalizing values3 Enter the sound adjustment mode Storing your own sound modes 4 Make adjustments as you like2 Select the sound mode you want to adjust 5 Store the adjustment you madeShake Selecting the display themeView MeterRetouch and edit the images Install / Start the programGRAPHIC DISPLAYS Import the images3 Press M MODE after the disc is detected Downloading images and animationsENGLISH 1 Open the control panelENGLISH If you want to cancel the procedureYou can assign your own names when editing a CD-R If you want to cancel the procedure9 Select highlight a file you want to download 12 Finish the download procedureENGLISH 8 Show the name list of the files included in the selected folderTo delete the files stored for “Opening,” Deleting unwanted filesTo delete all the stored files at a time time,” and “Movie”∞ down repeatedly To delete the stored files for “Picture” one by one5 To delete the file stored in “Opening,” 3 again5 Finish the setting Activating the graphic screen using either picture or movieActivating the downloaded images and animations Activating the animations stored for opening and ending screensSelecting a still image for graphic display-User Picture 4 Finish the setting4 Select a file you want 5 Finish the setting To cancel all graphic displays, select “Off” in stepadjust Basic ProcedureOTHER MAIN FUNCTIONS Changing the general settings 3 Select the PSM item you want toIndications Preferred Setting Mode PSM itemsFactory-preset ENGLISHNot displayed when the current source is “CD-CH” or “LINE IN.” TA VolumeDisplayed only when “DAB AF” is set to “Off.” Displayed only when DAB tuner is connectedTo turn the tag display on or off-Tag To adjust the display contrast level -ContrastTo show the graphics on the display -Graphics To select the display illumination pattern -LCD Typewhen the next track starts playing To change the FM tuner selectivity -IF FilterTo select the external component to use -Ext Input To select the amplifier gain control -Amp.Gain7 Finish the setting Selecting the dimmer mode5 Select “From- To” to set the timer for the dimmer mode 3 Press ¢ or 4 to select “Dimmer.” 6 Set the timerENGLISH Changing the display colorSetting the desired color for each source 6 Finish the setting6 Adjust the selected user color Creating your own color-User4 Select the user color adjustment screen 5 Select “Day” or “Night” which you want to make an adjustment forENGLISH Assigning names to the sourcesTo erase the entered characters 7 Finish the procedure while the last selected character is flashingThe control panel angles changes as follows Changing the control panel angle1 Press and hold angle until the angle adjustment screen appears ENGLISHENGLISH Detaching the control panelDetaching the control panel Attaching the control panelSelect the CD changer CD-CH CD CHANGER OPERATIONSPlaying discs ENGLISHTo go to the next or previous tracks To change the display patternTo go to a particular disc directly To fast-forward or reverse the trackTo go to a track quickly To skip to the next or previous folder only for MP3 discsHow to go to the desired track quickly ENGLISH5 up or ∞ down until a disc name list appears on the display Selecting a disc/folder/track using the name listsENGLISH 1 While playing a disc, press and holdTo play back tracks repeatedly Repeat Play Selecting the playback modesENGLISH To play back tracks at random Random PlayMode To cancel repeat play, select “Repeat Off” byTo cancel intro scan, select “Intro Off” by To play back only intros Intro Scan3 Adjust the volume 4 Adjust the sound as you want. See pages 32 EXTERNAL COMPONENT OPERATIONSChanging the display pattern Playing an external componentENGLISH Tuning in to an ensemble and one of the servicesWhat is DAB system? DAB TUNER OPERATIONSENGLISH When surrounding noises interfere your listening while drivingTo tune in to a particular ensemble without searching 4 Select a service either primary or secondary you want to listen toTo cancel the DRC effect, select “DRC Off.” Storing DAB services in memoryTo restore the FM/AM tuner 4 Select a service of the ensemble you want to listen topreset DAB service primary you serviceTuning in to a preset DAB Selecting a preset service using the preset service listfor Announcement Standby Reception Using Announcement Standby ReceptionWhat you can do more with DAB Road Traffic News Standby Reception TA Standby ReceptionENGLISH To activate Announcement Standby ReceptionHow Announcement Standby Reception works Announcement typeTo store your favorite programme service types, see pages 19 and Searching for your favorite serviceTo use Alternative Reception Using PTY Standby ReceptionChanging the display pattern 1 TEXT indicator implies the current service received is providing DLS Dynamic Label Segment-DAB radio text informationENGLISH Causes TROUBLESHOOTINGSymptoms ENGLISHRemedies SymptomsENGLISH CausesCauses Available charactersSymptoms ENGLISHWhen playing a CD-R or CD-RW MAINTENANCEHow to handle discs To keep discs cleanCD PLAYER SECTION SPECIFICATIONSAUDIO AMPLIFIER SECTION TUNER SECTIONBitte setzen Sie Ihr Gerät zurück Please reset your unitRefer to page of How to reset your unit Having TROUBLE with operation?KD-LH401 INSTALLATIONINSTALLATION MONTAGE INSTALLATIE INBOUW INELECTRICAL CONNECTIONS TROUBLESHOOTINGFEHLERSUCHE EN CAS DE DIFFICULTESDEUTSCH FRANÇAISNEDERLANDS ENGLISHFor amplifier only Amplifier / Verstärker / Amplificateur / VersterkerSubwoofer / Subwoofer / Caisson de grave / Subwoofer CAUTION / VORSICHT / PRECAUTION / LET OP