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Philips AZ3142 schematic

Does anyone have the schematic for this sitting around?

This is the wife's little pumpkin boombox and she complained about the volume not being as high as it used to be, pretty much across the board for AM, FM, CD, tape. So I figured the most likely was electrolytics in the power supply. Checked there, found higher esr on many than what I figured was normal, and ordered replacements. Once I got started replacing them, I found that one was not polarized, no markings on the board nor on the cap, so I didn't change it.

Put it back together expecting the volume to be fine, but instead finding that I now don't even have control of much of anything. The CD player display is not active, etc. I don't remember the rest of the specifics because it's been sitting on my workbench for about 4 weeks, but I will get back into it if anyone has suggestions. During the cap changouts I did unsolder the unpolarized one, but put it back the way it was. I also rechecked all the wiring and connectors about 5 times as that seemed to be the most likey suspect. I compared it to the pics I shot as I disassembled. Thoughts?

WT

Reply to
Wayne Tiffany
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Have you put back all the original caps, in their original positions?

It's possible you screwed up something else when replacing the caps (I've done it often enough), and you need to eliminate that possibility.

Reply to
William Sommerwerck

No I did not replace all the original caps as I double checked what I had on the board to my annotated picture that I printed to make sure I knew what was what. I'm not even sure I still have the originals as they were not what I considered good. Probably tossed them....

WT

Reply to
Wayne Tiffany

"Wayne Tiffany" wrote in news:493d6fd2$ snipped-for-privacy@news.x-privat.org:

Possibilities:

1) defective replacement part(s). New parts are sometimes bad. 2) another, unrelated part failed while you were working on it. 3) solder bridge, broken trace, bad solder connection. 4) mistake in reading part value on the original part. 5) broken connecting wire. 6) you may have misconnected something.

Since you seem to be saying that pretty much everything is screwy, I would start by checking power busses and grounds. A missing ground can cause all kinds of strange things to happen.

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bz    	73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an 
infinite set.

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Reply to
bz

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