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From: Colin Horsley on 9 May 2010 21:34
Greetings All,

Denon DP-1200 Direct Drive Record Player - Turntable

Would anyone have a circuit/schematic or any service information for this
turntable please?
Fault: erratic speed, on both 33 & 45.

Thanks

Colin





From: Franc Zabkar on 10 May 2010 00:31
On Mon, 10 May 2010 11:34:39 +1000, "Colin Horsley"
<horsley-spam(a)westnet.com.au> put finger to keyboard and composed:

>Denon DP-1200 Direct Drive Record Player - Turntable
>
>Would anyone have a circuit/schematic or any service information for this
>turntable please?
>Fault: erratic speed, on both 33 & 45.

Try looking for a similar model here:
http://www.vinylengine.com/library/denon.shtml

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
From: Trevor Wilson on 10 May 2010 01:33
Colin Horsley wrote:
> Greetings All,
>
> Denon DP-1200 Direct Drive Record Player - Turntable
>
> Would anyone have a circuit/schematic or any service information for
> this turntable please?
> Fault: erratic speed, on both 33 & 45.
>
> Thanks
>
> Colin

**Check the magnetic sensor (looks like a cassette deck record/play head),
sited near the inside rim of the platter. If it has a broken wire, or if it
is sited too far (there should be a fore and aft adjustement) from the
inside rim (where the magnetic information is recorded) then speed may be
erratic.IME, these things are pretty reliable, but I have seen the odd
sensor head problem. Be careful not to damage the magnetic strip.


--
Trevor Wilson
www.rageaudio.com.au


From: N_Cook on 10 May 2010 03:10
Colin Horsley <horsley-spam(a)westnet.com.au> wrote in message
news:7-KdncqHJaEn_3rWnZ2dnUVZ8smdnZ2d(a)westnet.com.au...
> Greetings All,
>
> Denon DP-1200 Direct Drive Record Player - Turntable
>
> Would anyone have a circuit/schematic or any service information for this
> turntable please?
> Fault: erratic speed, on both 33 & 45.
>
> Thanks
>
> Colin
>
>
>
>
>


If it has 1/2 speed setting pot/s check they are not worn/dirty.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm


From: Mark Zacharias on 10 May 2010 07:27
"Colin Horsley" <horsley-spam(a)westnet.com.au> wrote in message
news:7-KdncqHJaEn_3rWnZ2dnUVZ8smdnZ2d(a)westnet.com.au...
> Greetings All,
>
> Denon DP-1200 Direct Drive Record Player - Turntable
>
> Would anyone have a circuit/schematic or any service information for this
> turntable please?
> Fault: erratic speed, on both 33 & 45.
>
> Thanks
>
> Colin
>
>
>
>
>

I fixed a similar Denon (might have been the same model) which had a bad
drive transistor (TO-220 package). It was opening up emitter-base.
The turntable would run for a bit, then get erratic and even stop
altogether.
The coarse or fine speed adjustment pots are a more common (generic)problem;
often cleaning them will fix.

Mark Z.

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