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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc.

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Old 4th Dec 2019, 3:16 pm   #1
Paulus.d
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Default Sony TC-200

I got well and truly fed up with Tandbergs so picked up another one of these. The unit is mechanically sound and lubed up nicely.
Now the bad part there's very faint sound from both channels...
only one speaker is working as a connector has been broken on the speaker cable ..
What would be your first order of attack?
Regards Paul
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Old 4th Dec 2019, 4:14 pm   #2
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Default Re: Sony TC-200

I would give the heads a good clean, then clean the line/speaker switch and see if the line out signal is good. If it's ok then it's probably an amp fault, if not I would check the bias oscillator was ok.
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Old 5th Dec 2019, 9:27 am   #3
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Default Re: Sony TC-200

I suppose down to the age of these units you're gonna be very lucky to find a reel to reel that will work first time without any intervention.
I have several machines that don't work, the only one still okay and is the only machine I can rely on is an Elizabethan LZ-34...but it sucks as a main machine.....
Regards Paul
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Old 9th Dec 2019, 3:03 pm   #4
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Default Re: Sony TC-200

Now I've had a look ….. channel one is making a very quiet sound , channel two is silent
I've cleaned all the valve pins , pots and switches.
Looking at the circuit , I suppose really I'm looking for a cause that affects both channels at the same time ..
Rehagrds Paul
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Old 11th Dec 2019, 4:18 pm   #5
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Default Re: Sony TC-200

No one wanna help?
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Old 11th Dec 2019, 5:08 pm   #6
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Default Re: Sony TC-200

No sound on known good recordings? No sound on self recordings? Have you checked any voltages?

Lawrence.
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Old 11th Dec 2019, 5:27 pm   #7
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Default Re: Sony TC-200

not yet...….. its got a paper oil cap and a single diode so its half wave rectifier....
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Old 11th Dec 2019, 5:38 pm   #8
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Default Re: Sony TC-200

You don't state if you are working from the service manual (available from HiFi Engine)
and that there are two versions - the early one is all valved and the later one is mainly
valved with a transistor loudspeaker amplifier stage.
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Old 12th Dec 2019, 2:11 pm   #9
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Default Re: Sony TC-200

I do have the service manual …..it's the hybrid version...serial no. 50595...
theres a large plug inside on the chassis that looks like itunplugs all the power ...
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Old 12th Dec 2019, 2:40 pm   #10
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Default Re: Sony TC-200

This plug has to be connected …..volts across C1-1 and C1-2 is 170v …. valves all light up so 6v works ..C110, 210 and C2 are oil filled paper ...C110 or 210 shows a 177 ohm resistance across it, the other nothing.... C2 shows no resistance

Last edited by Paulus.d; 12th Dec 2019 at 2:48 pm. Reason: add more info
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Old 12th Dec 2019, 3:08 pm   #11
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Default Re: Sony TC-200

Some pics
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Old 12th Dec 2019, 3:10 pm   #12
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Default Re: Sony TC-200

near the right cap there are three wires that have been cut...is it supposed to be like that?
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Old 12th Dec 2019, 4:10 pm   #13
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Default Re: Sony TC-200

Looks like there's an output transformer missing unless I'm mistaken.

Lawrence.
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Old 12th Dec 2019, 4:39 pm   #14
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Default Re: Sony TC-200

Really...… you must be joking...….. I thought there would be two...
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Old 12th Dec 2019, 4:43 pm   #15
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Default Re: Sony TC-200

Quote:
Originally Posted by Paulus.d View Post
Really... you must be joking..... I thought there would be two...
In the photo's you've supplied I can only see one output transformer so I'm not joking unless the other one is hidden away somewhere.

The output transformer is a special according to the schematic I'm looking at.

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Old 12th Dec 2019, 5:11 pm   #16
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Default Re: Sony TC-200

oh * …… that's not fair ….
I've been ripped off again..
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Old Yesterday, 2:04 pm   #17
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Default Re: Sony TC-200

I suppose I'd better find a replacement one before I try and fix anything else --Paul
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