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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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Thread Tools |
4th Dec 2019, 3:16 pm
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#1 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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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4th Dec 2019, 4:14 pm
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#2 |
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Heptode
Join Date: Jan 2008
Location: Sheffield, South Yorkshire, UK.
Posts: 655
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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.
__________________
Martin BVWS member GQRP Club |
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5th Dec 2019, 9:27 am
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#3 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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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9th Dec 2019, 3:03 pm
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#4 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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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11th Dec 2019, 4:18 pm
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#5 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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Re: Sony TC-200
No one wanna help?
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11th Dec 2019, 5:08 pm
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#6 |
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Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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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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11th Dec 2019, 5:27 pm
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#7 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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Re: Sony TC-200
not yet...….. its got a paper oil cap and a single diode so it's half wave rectifier....
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11th Dec 2019, 5:38 pm
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#8 |
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Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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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12th Dec 2019, 2:11 pm
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#9 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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 it unplugs all the power ... |
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12th Dec 2019, 2:40 pm
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#10 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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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12th Dec 2019, 3:08 pm
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#11 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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Re: Sony TC-200
Some pics
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12th Dec 2019, 3:10 pm
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#12 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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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12th Dec 2019, 4:10 pm
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#13 |
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Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Sony TC-200
Looks like there's an output transformer missing unless I'm mistaken.
Lawrence. |
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12th Dec 2019, 4:39 pm
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#14 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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Re: Sony TC-200
Really...… you must be joking...….. I thought there would be two...
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12th Dec 2019, 4:43 pm
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#15 | |
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Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Sony TC-200
Quote:
The output transformer is a special according to the schematic I'm looking at. Lawrence. |
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12th Dec 2019, 5:11 pm
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#16 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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Re: Sony TC-200
oh * …… that's not fair ….
I've been ripped off again.. |
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13th Dec 2019, 2:04 pm
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#17 |
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Hexode
Join Date: Mar 2008
Location: Margate, Kent, UK.
Posts: 355
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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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