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Re: LCD display has died suddenly...
This radio has 2 lamps in the display to provide backlighting for the LCD, if 1 of them goes out, they both go out because they are in series.
The part number and specs are:
B30-1485-05 LAMP (5.5V 0.125A) ref # PL1 and PL2
To be sure this is the problem use this rule:
If the buttons on the display light up but the LCD does not, means the supply voltage is present, both use the same supply voltage.
The LCD does not light up, but you can see a very faint image of the display when you look close.
If either of the last 2 things mentioned are not true, you have a different problem.
If the buttons on the display do not light up as well as the LCD not lighting up, you have a bad voltage regulator IC on the main board of the radio, not a problem in the display. Or you have a bad connection for that supply voltage.
The part number for that regulator is:
BA4911-V4 ref # IC7
If the backlighting for the LCD is good, but you see no numbers or letters on the LCD, the LCD or the LCD driver IC is bad.
Both of these problems require very good soldering skills, unless you are confident with your own soldering skills I advise you to take it to an authorized Kenwood service center for repair.
Let me know if you need any more help and tell what you observe from the rules above.
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Just had the same thing happen to my new pioneer system. My truck battery died because I was jamming to the new installation, and the system just suddenly turned off. I charged the battery and the unit came on all the lights menus and displays worked like normal but there was no sound coming from the speakers. I checked all the fuses in the truck but none were burnt out. So I remembered there was a fuse on the back if the unit so I had to pull the unit back out. I checked the fuse and it was fine. I unplugged the wiring harness from the unit, plugged it back in and IT WORKED so I'm not sure exactly what was wrong with it, but I suspect when I unplugged the harness it reset the unit. So maybe this will work for your installation as well. Not exactly a high tech answer but maybe it will help ya! Good luck
maybe short circuit or similiar problem inside since its geting hot, probably not a problem with the faceplate I would remove the cd player from your car and take it to a professional for a diagnosis / repair estimate. Can't solve this one with text only.
Sounds like the source button is not working properly. I have seen this type of problem caused by a crack in the display board. It can also be a bad contact on the source button.
Could be several other things as well, but most of the time it is something like a cracked board.
You can also try resetting the unit, look to see if there is a very small pin hole sized button on the display someplace, if so, use a paperclip or a toothpick, ect. to depress that switch. you might get lucky and the micro just needs to be reset. Sometimes you can reset a unit by disconecting the power wires for a few seconds, or just unplug the harness in the back for a short time.
The substrait is probably cracked, that's the circuits inside the pc board of the faceplate. It will cost you too much to try to have it repaired. If you will wait for a few days I may have a face for it as I'm currently trying to fix one that is blowing fuses. I'm not going to spend a whole lot of time on it. I'll let you know.
I have a XMD3 with Sirius on a Larson boat. Had same problem - everything seemed to be fine on unit (everything lit up and CD showed different tracks and time changing), but no sound. I suspected a ground problem and checked wires I could see. Found one speaker wire that had been frayed due to faulty installation. As soon as I wiggled that wire I got sound on all speakers. Not sure why one faulty speaker would kill all sound, but it did for me.
Has anyone found a repair for this? My screen just died this morning...I've had it in my car for about 30K miles and I REALLY like the head unit...it's still working fine, but I can't even begin to try to mess with the EQ, or figure out what MP3 I'm going for without the screen :(
I fixed my Alpine TDA-7563 with the same problem. My display was completely blank everything else worked. After checking that the LCD display is getting power and everything else in the face that I can think of, I thought maybe the rubber LCD contacts were squeezed down or something and not making proper contact, so I just pushed it back onto the board and pressed.
This was at night, so I had an external lamp and noticed to my delight that the display was in fact working, nothing is wrong with it.
I am embarrased to say that as a technician I forgot that an LCD display needs a backlight, duh.
So a simple connectivity test on the 2 lamps shows that they are both blown.
I have to source them at my local electronics store, I measured the power supply to them as 12Volts, so it is just a matter of getting ones with the right dimensions and bright enough.
Hope you have the same problem, then it will be an easy fix for you.