Question about Kenwood KDC-216S CD Player

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LCD display has died suddenly...

...and the rest of the unit seems to be operating properly.  I'm guessing some sort of fuse.  but where?  any help would be appreciated

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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.

Posted on Jun 18, 2008

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