Amplifier Refurbs

[Edamski]

No luck this end finding who I was after but I have found this link :

http://www.praudio.co.uk/technics-amplifier-repairs.htm

Cheers for the link dude, unfortunately that's where my knowledge and courage ends with electronics haha I'll keep it though as it could prove valuable!


I agree with Marc as well, get the gear out! [emoji4]

[ValeTudoGuy]

hmmm this thread has reminded me that up in my loft I have my component hifi stashed away, not used for 12+ years, a Quad 405/2 amp and 34 pre-amp with a Rega Planar 3 turntable and two Teac cassette decks.

From memory I looked at selling them years ago, a specialist hifi shop in Leicester at the time recommended an independent dealer in old kit who also serviced stuff. I'll have a dig around.

Dude, you should get that kit out and playing.

[Edamski]

OK so it could be Power amps, transistors, regulators, dry joints, all sorts. Did it just go dead one day or was there an intermittent stage. Probably a stupid question but have you swapped the inputs (left / right) to ensure it is not the source and have you swapped the speaker outputs to ensure it is not the speakers / cables?

Yeah tried multiple inputs, radio/cd/tape/aux and tried multiple speakers on multiple outputs with original cable and new stuff. It was a gradual decrease not sure exactly but it's suspected it started after one New Year's Eve party with heavy usage haha

Lost all treble initially if I remember rightly and clarity. Mid and sub where still there.

No luck this end finding who I was after but I have found this link :

http://www.praudio.co.uk/technics-amplifier-repairs.htm

Cheers dude I'll have a read of that later

[SmokeyDave]

No luck this end finding who I was after but I have found this link :

http://www.praudio.co.uk/technics-amplifier-repairs.htm

[monkey66]

OK so it could be Power amps, transistors, regulators, dry joints, all sorts. Did it just go dead one day or was there an intermittent stage. Probably a stupid question but have you swapped the inputs (left / right) to ensure it is not the source and have you swapped the speaker outputs to ensure it is not the speakers / cables?

[Edamski]

Dead capacitors can be subtle.

I'd like to think if have noticed the top and bottom leaking ones but could quite easily have missed the bulging ones as I wouldn't have thought that would have gone pop, maybe a culprit there!

Ahh if it is output on an amplifier then there can be more candidates. Are you saying one channel has no output?

Yeah none at all on one buddy

hmmm this thread has reminded me that up in my loft I have my component hifi stashed away, not used for 12+ years, a Quad 405/2 amp and 34 pre-amp with a Rega Planar 3 turntable and two Teac cassette decks.

From memory I looked at selling them years ago, a specialist hifi shop in Leicester at the time recommended an independent dealer in old kit who also serviced stuff. I'll have a dig around.

Cheers buddy! [emoji4]

[SmokeyDave]

hmmm this thread has reminded me that up in my loft I have my component hifi stashed away, not used for 12+ years, a Quad 405/2 amp and 34 pre-amp with a Rega Planar 3 turntable and two Teac cassette decks.

From memory I looked at selling them years ago, a specialist hifi shop in Leicester at the time recommended an independent dealer in old kit who also serviced stuff. I'll have a dig around.

[monkey66]

Ahh if it is output on an amplifier then there can be more candidates. Are you saying one channel has no output?

[ValeTudoGuy]

Dead capacitors can be subtle.

[Edamski]

I meant outputs sorry, how I always referred to them with regards to my car audio haha I was separating them into left/right and front/back.

Yeah had the top off no signs of anything exploded, not sure what dry solder would looks like to be honest. I did give what I could a clean down with contact cleaner but no joy [emoji20]

It does not used valves [emoji4]

Input wise everything still works on the one output that does work. Yeah I have a working knowledge of basic electronics [emoji4] nothing looks like it's popped anyway. I'm not coming to Watford unfortunately [emoji20]

[monkey66]

It was released in 1989, would not have had a cd input in the 70's as they went invented then!

Nice looking bit of kit btw. There is a service manual on ebay for nearly the same price a a second hand replacement. Are you coming to Watford, I could grab it from you and take a look.

[monkey66]

By channels I take it you mean inputs? Because it's a stereo amp so only 2 channels. Have you lifted the Top Off? My guess is going to be dry solder at that age.

This, dodgy phono connectors, dodgy input selector switch or worse way expired electrolytic capacitors on the preamp stage.

Does any of the above mean anything to you?

[cigarmo]

Does use valves ?

[ValeTudoGuy]

Oh and a can of contact cleaner can work wonders.

[ValeTudoGuy]

By channels I take it you mean inputs? Because it's a stereo amp so only 2 channels. Have you lifted the Top Off? My guess is going to be dry solder at that age.