It just stopped working, I switched it off then on again and it started working for a few seconds then stopped again, no lights , no sign of any power although I think I can hear the transformer humming. I opened it up and found this. You can zoom in on the photo to get a closer view, it looks as though that resistor has exploded. No smoke, no smell of burning. Just above the transformer and big caps is a rigid bar running from one side of the case to the other, this looked scorched as if the caps and transformer give off a fair bit of heat, is this normal?
And whats this thing?
And whats this thing?
I'd try at least replacing those electrolytics, and check the surrounding components for damage while doing so. They could have leaked (there was a generation of caps from some vendors that made a mess over time) or it could be degraded adhesive.
Once the caps are removed I would clean the surrounding area with isopropyl alcohol and dry.. Check for and replace any rectifier diodes that are bad.
If the machine works at that point I would plan on replacing as many of the others as you can reasonably manage.
The item you asked to identify appears to be a crystal, the symbol underneath it is consistent with that usage. I suspect it has a rubber cap on it for mechanical damping of the case. I'd leave alone unless bad.
The electronics in most typical cd players is static sensitive so study up on proper ESD procedure.
Once the caps are removed I would clean the surrounding area with isopropyl alcohol and dry.. Check for and replace any rectifier diodes that are bad.
If the machine works at that point I would plan on replacing as many of the others as you can reasonably manage.
The item you asked to identify appears to be a crystal, the symbol underneath it is consistent with that usage. I suspect it has a rubber cap on it for mechanical damping of the case. I'd leave alone unless bad.
The electronics in most typical cd players is static sensitive so study up on proper ESD procedure.
Thanks chap, My first thoughts were adhesive but it does look messy, it's the resistor beside the caps that caught my attention, it looks as though it has exploded at one end.
Edit - this CDP doesnt seem to have any fuses in it, could that have caused this issue? The thing is I dont know very much about electronics but I would guess that something had to cause this, hopefully it is just bad caps but if that resistor has exploded what could cause it to do that?
Edit - this CDP doesnt seem to have any fuses in it, could that have caused this issue? The thing is I dont know very much about electronics but I would guess that something had to cause this, hopefully it is just bad caps but if that resistor has exploded what could cause it to do that?
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The fuses are those red cylinders that say T630ma etc 🙂 They are known as "Wickman" fuses. The resistor looks more corroded than zapped tbh. Hard to make out. Is it 4.7 ohm... just measure it.
What you are seeing is glue, the "dreaded brown glue", common to many, many brands of audio gear from 70's through the 90's. Starts out light tan, and is used to anchor larger components for flow soldering, but ages into ever darker brown, sped up by any local heat, until it gets black & conductive & corrosive. It has to be scraped away, carefully, especially from any lead wires, before it eats through them. It may or may not be the cause of current symptom, but it will soon cause problems.
Thanks Stephen, I was wondering because I also took a look inside my amp and it's there too, the amp works fine, a little twitchy in the balance department on very low volumes but nothing out of the ordinary. I take it I will need to remove the caps and clean it all up?
In the CDP it does look as though it was subject to quite a lot of heat, above the caps there is a metal plate , that has a faint black mark that looks as though something burnt underneath it, my other CDP a Marantz CD6000OSELE has no such burn marks and the caps are dry and held in place with a white paste type adhesive.
These are the caps in the amp.
I found this thread and it would seem Marantz also used white paste in the PM6010KI amplifiers.
Reparatie marantz pm6010KI
I have also noticed this white paste on some CDP photos on Google, I guess I just got unlucky and got the glued ones.
In the CDP it does look as though it was subject to quite a lot of heat, above the caps there is a metal plate , that has a faint black mark that looks as though something burnt underneath it, my other CDP a Marantz CD6000OSELE has no such burn marks and the caps are dry and held in place with a white paste type adhesive.
These are the caps in the amp.
I found this thread and it would seem Marantz also used white paste in the PM6010KI amplifiers.
Reparatie marantz pm6010KI
I have also noticed this white paste on some CDP photos on Google, I guess I just got unlucky and got the glued ones.
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