Seeburg AY160 Amp. rebuild bad sound, help

Seeburg · Message par **Seeburg** » mer. 07 06, 2006 10:09

Hi All,

Sorry that I write in Englisch but French is not my best language.
What a great site is this forum.

This week I started recapping the amp.
Bit by bit (because it is my first recapping amp.)
started at the left site of the diagram (j101).
I placed the amp from time till time back to see if I did a great job
and to see if everything is still working.

I could hear the sound improving. After recapping the hot-red channel
put it back in the AY160 I had a great sound a realy boost.
Also the very hot-orange color of the tube was gone and it didn't become very hot any more.
Also did some checking how it will sound if I change other sound-watt
instead of the 16watt I used. Everything sounds oke.

So I started alse recapping the other channel and the last part of
the amp (c121, c122 and c123). Still not done the multi-stage
capitor.

Put the amp. back in the juke turned on the juke made a selection
and got a very low/soft sound (lhad hoped a realy boost from both speakers) but no luck. It looks like the sound is working half of its production, also it looks like that one channel is more or less dead (very soft sound).

Already placed new tubes but this is also not working.

I checked an rechecked everything again to see if I have done something wrong.
As far as I can see nothing is wrong.

What can be the problem?

Advise and trouble shooting tips are welcome.

Jan

-m------p- · Message par **-m------p-** » mer. 07 06, 2006 13:06

Hello,

Welcome on the site. I'm not sure that many people here will understand english. Anyway, it's always easier to understand than speaking.
But don't worry. If anybody here is able to help you for your juke, you'll receive answers.

Message par **thierry04** » mer. 07 06, 2006 17:26

Hello

I believe you will have more help in english here :
http://groups.yahoo.com/group/seeburgju ... ationclub/

Seeburg · Message par **Seeburg** » mer. 07 06, 2006 23:10

Hi Thierry,

I know this group. Also post the problem there but no luck so far (with the solution) so I try it here.

Jan

thierry04 a écrit :Hello

I believe you will have more help in english here :
http://groups.yahoo.com/group/seeburgju ... ationclub/

Message par **thierry04** » jeu. 08 06, 2006 06:25

Hello

Just try to unplug J102 during play, is the sound coming back to normal ?

chicki · Message par **chicki** » jeu. 08 06, 2006 11:13

Hello,
I suppose you have checked the cartridge and needles ??
You can try to reverse the wires 1 & 2 on J101....by this way, you can verify if the problem don't come from the cartridge...
What's your amp ??? ...SHFA-2 ???

Chicki

Seeburg · Message par **Seeburg** » jeu. 08 06, 2006 18:34

Hi Thierry and chiki,

unpluggin j102 has no effect on the sound loudness.
plays still the same soft volume (yes the volume potmeter is standing to max).

The problem is not comming from the cartidge and needles.

The AMP which is in my AY160 is an SHFA4-5 (where the -5 is stamped in back paint)

Still any other options to check

Jan

chicki · Message par **chicki** » jeu. 08 06, 2006 18:52

Sorry....i can't help you...i have no schematics for SHFA-4-5...
Did you check all voltages marked on schematics ???

Chicki

Message par **thierry04** » jeu. 08 06, 2006 18:59

Hi

I suppose you checked voltages ?
Try to remove tube V109 (6EU7) to see if problem persists.
After, if its the same thing, try to cut center pin of CR104 and check again for the sound.

Seeburg · Message par **Seeburg** » mer. 14 06, 2006 09:53

Hi Thierry

Sorry for the late reply.
When I remove the tube V101 and/or V109 nothing changes. When I remove V109 then I have totaly no sound, so could it be the problem?
I still must check the CR104.
Do you realy mean cut off center pin from c144?

Jan