DUAL HS36 1210

twice the fun
timnor
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DUAL HS36 1210

Post by timnor » 02 Jun 2019 18:53

Dear All,

I just purchased an HS36 1210 with a dual 650 head shell for my daughter. It's her 18th birthday next week.

It's in good condition but the owner told me it was not running. However I've got it home plugged in and it's turning !
I'm absolutely new to Duals and am not that good at repairs. I have serviced my Thorens before.

My question is what are the essential steps I should take to allow my daughter to use the turntable ?
I imagine new needle ? Perhaps new cart ? I'm not expecting miracles from this turn table but don't want
it damaging her LPs. New belt needed I guess ? Not sure how to fit this.

As this has an integrated amp I am not sure what steps I should take to clean this up ?

The turntable came without speakers so I am also interested which speakers you would recommend ?

Any tips / links most welcome.
Thanks
Jim

timnor
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Re: DUAL HS36 1210

Post by timnor » 02 Jun 2019 22:07

I've been trying to remove the C clip and have to admit defeat here ! I see an opening in the shaft. I can insert a screwdriver but to not see a clip. After lifting the platter a few times it is now rattling which it wasn't doing before.
Hey ho the fun of playing around !

mrow2
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Re: DUAL HS36 1210

Post by mrow2 » 02 Jun 2019 23:30

Possibly it is a circlular ring, open slightly and lift up out and over the spindle? If so, take care with finger or thumb on it as it comes to top of spindle or it will fly away.

timnor
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Re: DUAL HS36 1210

Post by timnor » 03 Jun 2019 21:02

Thanks a lot. I'm a newbie to this stuff ! Finally I was able to remove the C ring and lift off the platter. I was also able to remove the deck from the base. The record player is powered as it is turning and all seems to be fine. However the light of the amp part is not lit when the unit is switched on. I have no speakers to check output but I believe the amp part is not powered. The two fuses at the back of the unit look fine. The wire in the fuse inside on the amp is not broken but there is a blob in the middle. Also one wire is loose. Following this post I will try to post some pictures.
Any suggestions most welcome.

timnor
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Re: DUAL HS36 1210

Post by timnor » 03 Jun 2019 21:08


timnor
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Re: DUAL HS36 1210

Post by timnor » 03 Jun 2019 21:09


mrow2
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Re: DUAL HS36 1210

Post by mrow2 » 04 Jun 2019 01:01

Dual HS36-1210 fuse.jpg
(49.8 KiB) Downloaded 110 times
Looks like the fuse might be blown, unless the wire inside extends all the way across. I only see part of a wire and the melted blob. Usually if it is blown, something in the amplifier caused it to happen, and it would happen again until the other part is fixed.

DESERTMAN
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Re: DUAL HS36 1210

Post by DESERTMAN » 04 Jun 2019 09:34

Hello,
you will find a service manual here:
http://www.hifi-archiv.info/Dual/hs36s/
there you will see were the yellow wire should go.
Regards Werner

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Re: DUAL HS36 1210

Post by vanakaru » 04 Jun 2019 11:25

Dual 650 is ceramic cart and HS36 is not able to play MM carts without additional RIAA preamp. So do not try to upgrade the cartridge without considering this. However some units have this preamp installed(it was optional and sold separately) and when you try to play Dual650 through it you get awful distorted sound. But Dual 650 is good sounding and plenty(and cheap) of replacement styli available.
Take the service manual and check what wires go where. If you can not check the fuse just replace it with proper rating(1A) one. The blob inside the fuse is normal - it is the part that melts when shorted.
I have this Dual too but in storage right now. It is rather nice compact unit and sounds wonderful - amp with germanium transistors. Specially if full range speakers used. When you look for speakers these need to be rather sensitive ie. easy to drive - the amp has only few W power. I would look for vintage ones.
Also I like idler type TTs over belt. Somehow the sound is more pleasant. But I had some rumble issues with the motor and idler assembly. These need fresh lubrication.
When you get it powered and TT is not acting as it should search for the info for "steuerpimpel" first.

timnor
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Re: DUAL HS36 1210

Post by timnor » 04 Jun 2019 20:43

Thanks for all the replies. I took out the fuses and the lamp and have checked them and they are all ok.

There are two fuses at the back
1 is labelled 315mA and has a fuse labelled M0.5/250C
1 is labelled 160mA and has a fuse labelled F0.4/250

Not sure if these are the right fuses ?

So now I'm stuck. The odd thing is that when plugged in and switched on the turntable is powered but the
lamp and the amp shows no sign of life even when I place the yellow wire back in its connection point
(not soldered just help in place). I see no further loose or broken wires. :( Any ideas really appreciated.

vanakaru
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Re: DUAL HS36 1210

Post by vanakaru » 04 Jun 2019 21:20

Looking at the schematics the fuses 315mA and 160mA are for power input, 1A fuse for the amp. If the TT is turning then first two must be OK and transformer gets the power. That should light the lamp up as well. Did you check the fuses and lamp with tester(multimeter)?

DESERTMAN
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Re: DUAL HS36 1210

Post by DESERTMAN » 04 Jun 2019 21:38

Hello,
somebody removed the plastic foil of the transformer, and there you will see a dark brown winding instead
of all the copper coulored ones. For me it looks like a broken transformers secondary winding.
Regards Werner

timnor
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Re: DUAL HS36 1210

Post by timnor » 04 Jun 2019 21:40

Thanks so much. The 1 A was tested with a multimeter. The lamp and other fuses were tested at a local hardware store that has a bulb tester which I could use to test, no reading just a green light to indicate the connection is ok.

timnor
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Re: DUAL HS36 1210

Post by timnor » 04 Jun 2019 21:42

DESERTMAN wrote:
04 Jun 2019 21:38
Hello,
somebody removed the plastic foil of the transformer, and there you will see a dark brown winding instead
of all the copper coulored ones. For me it looks like a broken transformers secondary winding.
Regards Werner
Thanks Werner,
Sorry what does this mean exactly ? You mean the transformer has been is broken ? The secondary winding is not normal ?

DESERTMAN
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Re: DUAL HS36 1210

Post by DESERTMAN » 04 Jun 2019 21:46

will answer tomorrow
Werner

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