marantz receiver

[odysseybmx414]

i got a beautiful old marantz receiver (forget the model at the moment) but i do know that the pots in the unit are very scratchy and dirty. i have contact cleaner and was wondering if it is safe to use this to clean the pots. (it says on the bottle for pcbs)

also going to replace caps and got to fix the fm tuner but sounds beautiful!

 

[odysseybmx414]

update- also safe for plastics and metals and removes dirt and oxidation, etc.

 

[Gigapod]

AFAIK the recommended product is called De-oxit. It will remove the oxide layer in the switches/pots.

 

[odysseybmx414]

ok cleaned pots, found out the volume control actually needed replacing so replaced it. everything was working good last night but now the volume control wont work and its all the way up all the time. lots of distortion. at least i got both channels working now, but does anybody know what this problem wouild be??

 

[odysseybmx414]

nobody wants to help me out??

 

[Gigapod]

Probably something you did when you replaced the volume potentiometer. May I suggest you take it to a professional workshop for a general check-up? It won't cost you an arm and a leg and at least you'll get it working.

 

[d3imlay]

Assuming it's one that has the pre out/main in, eliminate the power amp by running a cd player into the main input. Use the headphone jack on the player with the volume set to minimum.

 

[odysseybmx414]

figured out what happend that wretched old ground wire on the pots came loose, replaced and fixed. any mods do u guys suggest i do to this. im thinkin replace the old psu caps. maybe get all new pots for balance treble mid and bass. any suggestions?

 

[anatech]

odysseybmx414,
I repair and restore many Marantz amps and recievers. Just finished a 2265.

Firstly, what model do you have? Secondly, make absolutely sure you use 200mA 8V fuselamps for the dial. Do not use the 250 and 300 mA lamps that are easier to find.

Figured the ground wire came off as I read through the thread. Also understand that a line level signal into the main in jack may drive the amp into clipping. It would certianly be loud.

-Chris

 

[odysseybmx414]

well yea i tried that initially and it was really loud but then at least i knew it was most likely the volume control. i have to get the model # when i get out of work......pullin a long day today. but ill get that to you tomorrow. what is a good website to order some nice psu caps?

 

[anatech]

odysseybmx414,
Any of the main suppliers. Digikey, Newark, Mouser. Take your pick.

-Chris

 

[odysseybmx414]

thanks for your help

 

[alex mm]

... two years , a go , I rebuild my old marantz receiver,model SR 7100 DC ... 1. I replace all , old caps from power supplier with new elco-s 2. I clean pots with a mixture of therpinol and silicon oil . And now its sound great

A HAPPY NEW YEAR 2007 ! sorry for my poor english