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Old Marantz receiver make popping and hissing sounds no matter what

D

davidlaska

Jan 1, 1970
0
I have had it for decades but I do not want to give it up because it
works fine withstand the popping and hissing it does in all modes
except off. Is it over for it?
 
M

Mark D. Zacharias

Jan 1, 1970
0
davidlaska said:
I have had it for decades but I do not want to give it up because it
works fine withstand the popping and hissing it does in all modes
except off. Is it over for it?


It's fixable - get it to a shop that knows these things. Likely it's only
doing it on one channel, and this in turn would most likely be a noisy
transistor - they had a few problems with those, like 2SC458 and 2SC1213 and
the like. Can also be caused by a bad coupling capacitor, or if it's making
the static on both channels, could be an arcing power switch - although this
would cause interference on nearby AM radios and cause the dial lights to
flash and dim.


Mark Z.
 
J

James Sweet

Jan 1, 1970
0
Mark said:
It's fixable - get it to a shop that knows these things. Likely it's only
doing it on one channel, and this in turn would most likely be a noisy
transistor - they had a few problems with those, like 2SC458 and 2SC1213 and
the like. Can also be caused by a bad coupling capacitor, or if it's making
the static on both channels, could be an arcing power switch - although this
would cause interference on nearby AM radios and cause the dial lights to
flash and dim.


Mark Z.


I had an intermittent problem exactly like this on an old Wards
receiver, problem turned out to be a bad mosfet transistor in the preamp
section. Since mine was intermittent I was able to track it down with
some freeze spray.
 
T

Trevor Wilson

Jan 1, 1970
0
davidlaska said:
I have had it for decades but I do not want to give it up because it
works fine withstand the popping and hissing it does in all modes
except off. Is it over for it?

**The lack of actual information you've provided is simply breath-taking. At
a very minimum, here's what you need to supply:

Model Number
If the fault is input dependent.
If the fault is volume control level dependent.
If the fault is tone control dependent.
Does it occur after a period of time, or immediately?
Etc.
 
D

davidlaska

Jan 1, 1970
0
**The lack of actual information you've provided is simply breath-taking. At
a very minimum, here's what you need to supply:

Model Number
If the fault is input dependent.
If the fault is volume control level dependent.
If the fault is tone control dependent.
Does it occur after a period of time, or immediately?
Etc.

All answers are 'no' and it is in one channel. model number #4415
 
M

Mark D. Zacharias

Jan 1, 1970
0
**The lack of actual information you've provided is simply breath-taking.
At
a very minimum, here's what you need to supply:

Model Number
If the fault is input dependent.
If the fault is volume control level dependent.
If the fault is tone control dependent.
Does it occur after a period of time, or immediately?
Etc.
All answers are 'no' and it is in one channel. model number #4415

The 4415 sounds like one of their smaller quad units, some of which used
rather unusual driver IC's. I don't remember the part number, but I've got a
few in a parts drawer at work. Can't say if thhis goes in yours, or if this
is your problem.

Mark Z.
 
D

davidlaska

Jan 1, 1970
0
Question 4 is not a yes or no answer, is it?

You are correct, and thanks for keeping me on the path...

I will find a an old 8-track receiver to power my speakers...
 
D

davidlaska

Jan 1, 1970
0
Question 4 is not a yes or no answer, is it?

I will use a set of these made in China for computer speaker needs.
However, I will miss my last receiver ( the Marantz four channel) that
has survived with me ( I am 48).
 
D

davidlaska

Jan 1, 1970
0
Question 4 is not a yes or no answer, is it?

I did not mention or really notice that it was one channel doing the
noise. Since you pointed out that attention to detail helps if
posting to this forum, I paid attention and realized it is one of the
two channels bothering me. So I disconnected that speaker and the
noise is gone (along with stereo sound).

Thanks for pointing out the obvious, I have computer sound without
that terrible noise.

Thanks to everyone who replied, I realized that I could use one
channel for now. I do not want to get into replacing parts for now.
 
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