Question about JVC MX-K30 CD Shelf System

1 Answer

Display demo Unit was in storage for 4yrs. Now it will play a cd for 2 - 4 minutes then stop, randomly displaying demo on display or track # and track time after the song stops. Never experienced this prior to storing away. I assume it can't be in sleep timer mode bc it only plays about 2 to 4 minutes before shutting off.

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  • JVC Master
  • 5,259 Answers

Could it have been knocked when in storage? Also try cleaning the lens of the CD player see if that makes a difference.

Posted on Jul 24, 2013

Testimonial: "Thanks for the suggestion. When I say storage, I mean I moved it to a corner of the (finished)basement, unused for a few years. Doubt it got bumped. At first it wouldnt read the disk at all so I did clean the lens, first with cleaning disk unsuccessfully, then with qtip and alcohol. That did the trick in that now it will read cds and play. Its just that the first song will play for just a couple minutes, then shut off. JVC suggested cancelling DEMO, but that didnt work either. Figured it would be something simple like that because it will play, just not for very long. Doubt it has a factory reset or anything like that."

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SOURCE: Cassette player works fine, then screeches after 20-30 minutes.

Yeppers very common problem .. If the noise dosent come from the speakers then the problem is in the motor in the cassette deck. if the problem comes from the speakers when the deck is playing a tape, then the problem is in the record/playback switch. you may beable to fix it by spraying just a lttle bit of tuner cleaner inside the switch. It shouldnt cost much to have a repair shop do this as if you spray too much your going to ruin the belts and the mechanism. Good Luck

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SOURCE: Random things happening

How much old ur set and change all belts clean the mel. parts and check. Change the vol. control.

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Tri to clean the optical block assumbly or replace with a new one.

Posted on Feb 25, 2008

VOTIT
  • 2071 Answers

SOURCE: CD Player Problems

Manually cleaning the lens
To locate the laser lens, look around the door or drawer of the DVD player and you will see a small circular disc, which is often called the turntable or disc platter. Right off the edge of the platter you should see a small clear lens. There are some manufacturers that have had problems with the lens, depending on the age of the unit. In these problem players, moving the unit to a different location, turning the unit upside down, or sometimes even without moving the unit, the lens can become detached from the laser assembly and floats around inside the unit. You can re-glue it back with a little crazy glue, BUT it must be perfectly centered, and without getting any glue on it. So, if you don’t see the plastic lens, but instead see the laser pick-up assembly, look around for the lens inside the unit and glue it back on.
To clean the lens you must use very little pressure. Take a cotton swab and barely moisten it with plain, non-scented, or oily type alcohol. In a swirling motion, very gently rub the lens until you’ve covered it entirely. Then repeat using the dry end.
If the cleaning didn’t help, don’t despair just yet. You can see if there’s a problem elsewhere in the unit by using a few simple tricks and tips.
First thing you want to see if the unit’s laser is in good working order. This method isn’t foolproof, but most of the time works admirably. When you insert a disc, see if you can look up underneath where the disc sits on the turntable. Observe the laser lens going up and down. If the lens is trying to focus, that’s good! After a few seconds of the lens trying to focus, the platter should start to spin. On almost every CD/DVD unit I've encountered, the unit won't spin unless the laser has properly focused on the surface of the disc. If the unit spins up and and then shuts down, you should check and make sure the laser pick-up assembly slider mechanism is working without any obstructions and that the small chrome rail that it slides on is slightly greased. Don’t go overboard with the grease though, as too much can cause all sorts of problems.
The slider mechanism, depending on the age of the unit and the manufacturer, consists of the small chrome rail, a drive motor, a small gear assembly, and (in some units) a small belt that drives the slider unit via the motor. This small belt causes all sorts of problems. If the belt is broken or slipping, it can cause skipping, dropouts, or simply no start up at all. Also, if the belt breaks in the middle of the disc, the drive mechanism gets hair or dirt wrapped up into the gears, or the pick-up assembly doesn’t return to the start position (called home), the unit will (99% of the time) refuse to release the disc, causing it to become stuck inside the unit. There’s a little micro or leaf type switch located at home position that sometimes gets dirty or breaks and, causing this problem also.
If the disc starts to spin slowly and doesn’t come up to speed, the spindle motor that’s attached to the turntable platter is a common problem. There could also be a problem with the spindle motor driver controller IC or the power supply regulator that supplies voltage to the driver IC. If the disc starts to spin and then spins really fast, or stops and starts to spin backwards, your problem is the laser pick-up assembly or the servo control circuit. If you continue to have problems after cleaning and checking the other things listed above, you may have a problem with the player's alignment. Of course, one of the problems you'll face checking alignments on a DVD/CD player is that you’re going to need to use an oscilloscope on most of them. If you have the proper tools and equipment, the first thing to look at is the RF pattern of the unit while its playing. It should be a sharp and clear pattern. If it's dull and smeared, then the laser could be weak.
Also, in these units are very critical alignments called the focus/tracking gains and offsets. When these alignments are off, it can often cause intermittent troubles. As the unit ages and parts change value, so do these alignments, and will need to be checked. In my time as service technician repairing DVD/CD players, 65% of the laser pick-up assembles I have tested were good and only needed a small adjustment. Today's technology makes it unfeasible for a shop to hook up a DVD/CD player, and even some recorders, to their equipment and make these adjustments because of the cost involved.

Hope this may help;

Regards,
VOTIT

DON'T TO FORGET TO RATE

Posted on Aug 17, 2008

  • 2 Answers

SOURCE: Does not play CD-s

I dont know if you were able to solve the problem or you have discarded the unit. I had the same problemeverytime you remove it from the power and it was so annoying, no matter what amount of cleaning you do. It worked sometimes after 15 0r 20 loading and unloading of the CD.I was in t position to dump it but i took a chance. I opened the CD drive and found a sort of TRIMMER of POTENTIOMETER very close to the lense and just adjusted it trial and error. I read somewhere that increasing the intensity of the laser may help. Maybe I have increased the intensity and from that time on It never have any problem.

Posted on Nov 01, 2008

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1 Answer

I CANNOT SWITCH OFF THE EQUIPMENT ,AS SOON AS I GET TO SWITCH OFF THE HI FI IN A FEW SECONDS THE EQUIPMENT SWITCH ON AGAIN AND I CAN SEE THE WORD DEMO ON THE SCREEN


RTFM: Page 13:

"A demonstration of the display is shown if you have not set the
clock. You can reduce the power consumed in standby mode by turning the demonstration off.
While the unit is on:
Press and hold [–DEMO] until “NO DEMO” is
displayed.
Each time you press and hold the button:
NO DEMO (off) DEMO (on)

This is a 24-hour clock.
The example shows how to set the clock for 16:25 (4:25 p.m.).
1 Press [0/I] to turn the unit on.
2
Press [CLOCK/TIMER] to display “CLOCK”.
Each time you press the button:
CLOCK>>PLAY>>REC>>Original display
Within 5 seconds
Press [SET].
3
Press [TUNING (Up or Down)] to set the time.
The time display can be changed in one minute units by tapping
the buttons, and quickly by holding down the buttons.
Press [SET].
The time is set and the original display is restored."


Or under Troubleshooting Page 38:

"The display starts up even after the unit is turned off.

The demonstration feature (–DEMO) is on. Turn it off if it is not required."

If you need the manual go to
http://audio.manualsonline.com
register and get it for free.

Mar 25, 2010 | Technics SC-EH780 CD Shelf System

3 Answers

CD operation problem. Need manual.


You'll just need to disable the Random Play mode. I'll give you the link to the manual in a minute.

Oct 24, 2008 | Philips AZ1020 Boombox

1 Answer

Sony CDX-S2210 CD Player stuck on demo mode , cant adjust volume eq, skip track or anything


make sure the unit is switched off and the clock is displayed then

1 Press and hold (SEL).
The setup display appears.
2 Press (SEL) repeatedly until the
desired item appears.
3 Press the volume +/– button to select
the setting (example “ON” or “OFF”).
4 Press and hold
(SEL).
The setup is complete and the display returns
to normal play/reception mode.
Note
Displayed items will differ, depending on the source
and setting.
With the card remote commander
In step 3, to select the setting, press
< or ,.
The following items can be set (follow the page
reference for details):
“z” indicates the default settings.
*1 When the unit is turned off.
*2 When the audio output is set to “SUB.”
CLOCK-ADJ
(Clock Adjust)
(page 4)
BEEP To set “BEEP-ON” (z) or
“BEEP-OFF.”
SUB/REAR*1 To switch the audio output.
– “SUB” (z): to output to a
subwoofer.
– “REAR”: to output to a
power amplifier.
DIM (Dimmer) To change the brightness of the
display.
– “DIM-ON”: to dim the
display.
– “DIM-OFF” (z): to
deactivate the dimmer.
DEMO*1
(Demonstration)
To set “DEMO-ON” (z) or
“DEMO-OFF” (page 4).
A.SCRL
(Auto Scroll)
To scroll long displayed items
automatically when the group/
track is changed.
– “A.SCRL-ON”: to scroll.
– “A.SCRL-OFF” (z): to not
scroll.
LPF*2 (Low
Pass Filter)
To select the cut-off frequency
“78HZ,” “125HZ” or “OFF

Jan 28, 2010 | Sony CDX-S2210 CD Player

1 Answer

Owners Manual for Kenwood Car radio Model KDC-M4527


KDC-M4527
CD Receiver with WMA/MP3 decoder Built-in

Audio Features
- 4 x 50 watt maximum output power by MOSFET Power IC
- 1 RCA preout, 2 Volt
- Separated tone control: Bass/Mid/Treble
- Source tone memory
- Balance/Fader/Loudness control
- System Q: Sound control with pre-programmed tone curves
- Auxiliary input with optional unit (CA-C1AX or KCA-S210A)
- Attenuator (-20dB) with smooth volume return

Tuner Features
- 24 presets: 18 FM, 6 MW/LW
- K3I clean reception Tuner
- Radio Data System (RDS) with Radio text
- Auto memory entry (AME)
- Up/Down seek tuning
- Local Seek
- FM Stereo/Mono selector
- Tuning mode : Auto1/Auto2/Manual
- DAB reception with optional unit KTC-9090DAB

CD Features
- CD-R/RW compatible
- 8 times over-sampling
- 1 bit D/A converter
- S/N ratio: 105 dB
- Dynamic range: 93 dB
- Channel separation: 85 dB
- MP3 decoder with ID-3 Tag display
- MP3 decoder MPEG-1/2 Audio layer-3
- WMA decoder: windows media audio
- CD-text
- Random/Repeat/Scan Play

Changer Features
- Dual changer control capability (CH1/CH2 & AUX)
- CD-Text with compatible units
- Disc Name Preset System with compatible units
- Disc & Track repeat
- Disc & Track scan
- Disc & Magazine random play

General Features
- Removable faceplate
- Protection case for faceplate
- Disabled System Indicator (DSI)
- Mono Colour LCD display
- 14 segments x 8 characters
- White LED display backlight
- Selectable key illumination (red or green)
- 24 hours clock
- Auto Dimmer
- 2 way telephone mute
- All off select (20/40/60 min.)
- Built-in fuse/coil
- ISO A/B connector
- Remote sensor for optional remote control unit
- OEM steeringwheel remote hardwired connection
thats the most i could get go here http://kenwoodusa.com/Contact/ and have them send u one hopw that helps.

Oct 01, 2009 | Kenwood Car Audio & Video

1 Answer

How do I stop the JVC from wasting the readout on KM200?


Hello mwalkercom

It sounds like your JVC is still set for factory default which is "DEMO" mode.

To cancel the DEMO, you need to go into PSM (personal settings mode).

1) Press and hold SEL until the display changes.
2) Press left/right rocker until DEMO is displayed.
3) Turn volume knob to change to DEMO OFF.
4) Press SEL briefly to exit.

Now you can use the DISP button to change the display to show the options you desire.

Hope this helps.

Aug 31, 2009 | JVC AM FM CD DET FACE CAR STEREO

2 Answers

Stuck in demo mode. how do i change it?


Hello jayme84,

To cancel "DEMO" mode on the JVC:

Enter the PSM (personal settings mode) and turn DEMO off.

1) Press and hold "SEL" until the display changes.
2) Use the left/right rocker switch until "DEMO ON" is displayed.
3) Turn the volume knob to select "DEMO OFF".
4) Press "SEL" to exit.

Hope this helps.

Apr 28, 2009 | Car Audio & Video

1 Answer

Need user manual


I have the CDR-200 and did not have the manual either. However, I did discover the same problem and found the solution. There is a "confirm" button on the front of the unit under the display area. After you press the record button "Record" will begin to flash in the display area and then you press "Confirm". It should start recording. Note however the following:

BURNING FROM EXTERNAL CASSETTE OR PHONO
Before starting this procedure make sure you have an AUDIO recording CD in the RECORDER tray of the CDR-200. A regular CD-R type of disc for computers is not going to work and may cause an annoying message on the display which does not go away until you put the right type of recording CD in the unit. It must be either an AUDIO CD-R or an AUDIO CD/RW.

1. When copying from an external cassette deck, you should set the source (press source button) until the setting is "Analog".

2. The "Dual" button should not be in effect. In the lower right portion of the screen you should only see a small number "1" with a circle around it. This indicates the CDs currently being used by the burner. In "dual" mode you can copy from the Playback CD of the CDR-200 to the Recorder CD. In dual mode you see "1" and "2" with circles around them. The active CD tray will flash on the display.

3. When copying from an external cassette unit, you use the "Record" button to start the recording. At the end of the cassette track you MUST press the STOP button by the CD Recorder tray. After you press STOP the unit will say "Update" which indicates it is closing out the track on the CD-R. You can continue to write tracks by pressing RECORD again, then CONFIRM when the tape is positioned at the right PLAYBACK track. It is usually helpful to have a few seconds of blank tape at the start of the PLAYBACK track before pressing RECORD. Press play on the cassette deck, then RECORD followed by CONFIRM on the CD burner.

4. When the track has finished burning you must press STOP to close the track on the CD-R. After you press STOP, the unit will display "Update" to indicate it is updating or closing the track. When the process completes, the unit will display the tracks it has written to the CD-R and will be ready for you to copy another track or FINALIZE the CD-R. When the unit is waiting after the STOP, you can change the cassette tape, reposition to a playback track and ready the playback tape for more recording. When the PLAYBACK tape is ready repeat STEP 3. Repeat steps 3 and 4 until you have about 14 or 15 tracks on the CD-R.

5. When you have finished recording about 14 or 15 tracks onto the CD-R, you will want to finalize the CD-R. Press the FINALIZE button, and then press the CONFIRM button. You will see the the unit start to display the progress of the finalize by advancing the level meters of the left and right channels in the display. When the unit is finished finalizing it will return to the number of tracks display for the CD-R. After finalizing the CD-R you can play it back to make sure the burn was successful. Be sure to wait for the tracks display before removing or playing the CD-R after the finalize is done. Removing before the finalize is done may damage the unit and may render the CD-R bad.

BURNING FROM THE PLAYBACK CD
Before starting this procedure make sure you have an AUDIO recording CD in the RECORDER tray of the CDR-200. A regular CD-R type of disc for computers is not going to work and may cause an annoying message on the display which does not go away until you put the right type of recording CD in the unit. It must be either an AUDIO CD-R or an AUDIO CD/RW.

1. Set the unit to "Dual" mode. As described above, you will see "1" and "2" with small circles in the lower right portion of the display.

2. Make sure the "Source" mode is set to "Analog" by repeatedly pressing the SOURCE button until it shows "Analog".
3. When copying from the PLAYBACK CD tray you will not use the RECORD button by the CD Burner tray. You will use the 'DUB" button just to the right of the display.

4. Put an audio CD in the PLAYBACK CD tray and press the skip track button ">>" until you arrive at the track you wish to record from. If the track you want to start at is track 1, then you don't need to skip tracks.

5. When positioned at the correct playback track, press the DUB button. The unit will show "CDR" and then "DUB" on the display. When it says "DUB" press the CONFIRM button. The unit will start recording. You can adjust the record level during the first few seconds to make sure you don't have the recording volume level set too high.

6. When the track is finished, you should see the unit indicate on the display "Update". This indicates it is closing the track and it should do this automatically. If it does not do this you may have to press STOP near the RECORDER Tray to force closing of the track. Usually the unit indicates "AUTO" in the display area and I believe that is what controls the automatic track numbering feature. I am not sure how the AUTO feature is turned on. I noticed on the CDR-200 it is on by default.

7. After the UPDATE is complete, the unit will display the number of tracks it has written to the CD-R. You can at this point change the PLAYBACK CD to another one or advance to another track for continued recording. When at the correct track simply go back to step 5 and continue.

8. When you are all done copying tracks from one or more CDs, and you wish to finalize the CD press FINALIZE and then press CONFIRM to start the finalize process. I noticed on the CDR-200 if you wait too long after recording a track the unit may start the finalize process automatically. This happened after at least 5 minutes. It is best to try and stay with the copy process to monitor what is happening. The finalize can also start if you have written to many tracks to the CD-R and it runs out of space. Typically, your safe if you burn about 14 to 15 tracks to a CD-R at a time. You might be able to fit more if the tracks are very short (2-3 minutes each).

One last note about the connections on the back of the unit. Read the labels of the connections on the back very carefully. The CDR-200 and probably the 201 have separate outputs for the PLAYBACK CD (CD) and BURNER CD (CDR). You will want to connect these to seperate inputs on your audio amplifier. Or you might also wish to merge them using adapters into one input on your audio amplifier. If you keep them separate you will need to change sources on the audio amplifier to hear each tray. For example, you might need to switch to "CD/TAPE" for the CD, and "AUX" for the CDR. It is probably easier to merge the two using audio adapters which can be readily obtained from RadioShack.

I hope this helps!

May 08, 2008 | Classic Electronics CDR201 CD Recorder

1 Answer

JVC KD-G322 Demo mode


Hold down the "SEL" button, and use the CD track skip button to scroll to where the display says "DEMO," and use the volume knob to change the setting to "OFF." Push SEL again and you're good to go.

Apr 03, 2008 | Kenwood KVT-617DVD Car DVD Player

1 Answer

2 questions


Hold down the Display/Menu function button (one of those three buttons on the left of the unit) for about 3-4 seconds until the display reads "t set". When this appears, push the track forward button once (>>|) so the display reads "beep"; now press the play pause button (>||) once. The display will now say "on", push the track forward button (>>|) once to make it read "off"; now push the stop play button. You're done. Enjoy the silence.

Mar 14, 2008 | Sony Walkman D-EJ100 Personal CD Player

1 Answer

CD player won't play random


the most likely problem is a weak or failing optical pickup. try a cleaning disc first there may be dust on the lens. do not use any liquid to clean the lens. remember this is an optical system if it can't focus properly or "see well" it can't read.

Feb 03, 2008 | Audio Players & Recorders

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