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Pioneer KEH-M9500RDS car stereo doesn't find changer CDX-M30

 
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rip



Joined: 27 Apr 2008
Posts: 4

PostPosted: Mon Apr 28, 2008 10:43 pm    Post subject: Pioneer KEH-M9500RDS car stereo doesn't find changer CDX-M30 Reply with quote

Hello,

I have a Pioneer KEH-M9500RDS car stereo with a cd-changer CDX-M30. Now the stereo doesn't find the changer. It acts like there were no changer connected and the stereo has a very slow reaction when a button is pressed. Its like a overloaded computer.

I replaced the changer with another used one, but the problem still remains.
The unit works normal when the changer is disconnected.

I have no schematics, so I can only guess that there's something wrong with the connection-bus. The data-cable between the devices is ok, all pins are connected, no short cuts between the pins.

Any idea what's wrong here??
Has anyone a schematic about the pioneer bus? All units called KEH-M.... should have the same bus.


Thanks, rip
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kenray
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PostPosted: Fri May 02, 2008 12:40 am    Post subject: Reply with quote

It's possible you may have a bad ic in the head unit that is not interfacing with the main microprocessor.
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rip



Joined: 27 Apr 2008
Posts: 4

PostPosted: Fri May 02, 2008 1:08 am    Post subject: Reply with quote

Maybe, but w/o docs...

CU, rip
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kenray
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PostPosted: Fri May 02, 2008 4:54 pm    Post subject: Reply with quote

the ic would more than likely be fairly close to the din cord input for the changer.
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rip



Joined: 27 Apr 2008
Posts: 4

PostPosted: Sun May 04, 2008 11:25 pm    Post subject: Reply with quote

The problem is solved.
It was a broken circuit path. There was no visible damage, but you can't fool a ohmmeter. Smile
I fixed it with the red wire.




rip
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