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pioneer sx1500td blowing fuse - Printable Version

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RE: pioneer sx1500td blowing fuse - KCMike - 02-01-2015

The wires I removed were shielded. I do belive they are all shielded on all the inputs and out puts of the boards.
The way I had it hooked up the Vol. control was out of circuit. as the in1 and 2 of con. amp went to volume control.
I have put everything back to pre test.
I appreciate all the help you provided. It had to be a pain to trouble shoot remotely. I might try the AK forum. I have never asked anything over there.
If I do get this resolved I will be sure to let you know via this thread and so any others that has followed this will know what it turned out to be. Again thanks.

RE: pioneer sx1500td blowing fuse - morzh - 02-01-2015

Well, an extra expert opinion would not hurt.

PS. Remember, once all is working, you need to align the output amps.

RE: pioneer sx1500td blowing fuse - Ron Ramirez - 02-01-2015

Yes, Mike, please keep us posted.

I'll see you over there - I am also an AK member. Icon_smile

RE: pioneer sx1500td blowing fuse - KCMike - 02-01-2015

Will do. I did not realize you were a member of AK till the other day. I found your post on changing the dial lamps on your pioneer. Good info. You saved me possible damage to mine when I get to them.

RE: pioneer sx1500td blowing fuse - morzh - 02-02-2015

What is AK?

RE: pioneer sx1500td blowing fuse - Eliot Ness - 02-02-2015

Audiokarma:

http://www.audiokarma.org/

RE: pioneer sx1500td blowing fuse - morzh - 02-02-2015

A-ha. Thanks.
It's just when someone says AK, it has very stable association with a particular weapon for me.
Though I suspected that was not about the weapon. But could not project AK onto something having to do with radio......

RE: pioneer sx1500td blowing fuse - Ron Ramirez - 02-02-2015

The first thing I think of when I hear or see the initials "AK" is Atwater Kent. Icon_smile

RE: pioneer sx1500td blowing fuse - morzh - 02-02-2015

We had our research center chairman back in Russia, his initials were AK, so this is hiw we called him sometimes...,

RE: pioneer sx1500td blowing fuse - KCMike - 02-10-2015

Thought I would put final update on here.
I tried the Audio Karma forum and did not get any responses to my request for help.
I guess this receiver will become a parts radio if needed.
I took a chance on buying another sx-1500td off the bay for $20.00 that said lights up but no output.
After getting it. I cleaned all the switches and looked the insides over.
Fired it up and it plays great. Its now my work room receiver.
I did add new blue led dial lamps. Looks good.
Guess I'll never know what the FM problem is on the other one.

RE: pioneer sx1500td blowing fuse - Ron Ramirez - 02-10-2015

Mike, I had been watching for your post but never saw one. ??? I was looking in the Pioneer Audio section, did you post it somewhere else? You might try posting again, in the Pioneer Audio section.
http://www.audiokarma.org/forums/forumdisplay.php?f=90

Well, since you bought another SX-1500TD and it is working, you can always use the other one for parts to keep the good one going?

I see you added blue LEDs behind the dial. I used white. I suppose I could have used blue, since the dial lights up blue anyway.

RE: pioneer sx1500td blowing fuse - Ron Ramirez - 02-10-2015

Someone else at AK had a low FM problem with their SX-1500TD. The culprit turned out to be Q204, an LM703, on the FM-IF board. I don't know if this will help you, but here's the thread:
http://www.audiokarma.org/forums/showthread.php?t=641443

Edit: I just found your AK thread. I'll post something there, maybe it will help wake someone up.

RE: pioneer sx1500td blowing fuse - KCMike - 02-10-2015

Thanks Ron. I went by an old nickname when I signed up.
I probably did not phrase my problem very clearly to cause someone to respond.
I originally had composed a much more detailed explanation but took so long when I went to post it I was I guess auto logged off.

RE: pioneer sx1500td blowing fuse - Ron Ramirez - 02-10-2015

I've noticed AK is slow/sluggish lately. The problem could just be on my end.

RE: pioneer sx1500td Fixed! - KCMike - 04-03-2015

Thought I would post a new update on the pioneer FM problem. ITS FIXED!!
I just could not leave this problem alone and continued to learn about stereos through some older FM stereo trouble shooting books I purchased.
Finally traced the trouble to the MC1304p integrated circuit on the MPX board.
After trying for 2 weeks to find this IC. or a compatible replacement. I got another complete MPX board and installed it and the thing came to life. Plays good but I will need to replace dial lamps and learn how to adjust the bias and idle current.
A thanks to morzh and Ron for thier assistance with this. Just wanted you guys and anyone else that had followed this thread to know what it turned out to be.