second TC-580 needed a lot of work...

Posted by ltman on April 29, 2024 at 18:11:24

This one came in as "non-functional" from seller so it was a relative bargain. I had planned to use it just for parts but then got it working quite well.

Replaced all 3 motor start/run caps

deep cleaning and lubing of mechanical levers and actions

doxit fader lube baths for all switches (user accessible and internal) and pots

CRC electronic cleaner spray bath of circuit boards in situ

replaced both counter belts

replaced pinch roller

replaced brake pads for both reels and adjusted spring positions

adjusted "semi-variable" reel power resistor for correct motor electrical back pressure for FF and REW functions.

Adjusted reel clutch tension for both reels using spring scales and dynamic setting (reels under power)

ToDo:

Test and adjust pinch roller pressure and capstan motor voltage.
Calibrate the VU meters
Waiting on replacement mic pot (bent shaft), Calibration tape, and NAK-T100 software emulator for testing and adjusting wow/flutter and motor play speeds.
OScope testing of head alignments

Suprisingly, the ESP auto-reversing function works (8 seconds of no signal on all 4 tracks initiates reverse). I forgot I had switched it on and it surprised me when it auto-reversed perfectly.

The electronics on these Sonys seem very robust, more so than the Pioneers. All three Sonys I have worked with have had no audio problems from the get-go. Not like the Pioneers at all with their very common transistor corrosion problems.

Sounds really nice, highs extended and sweet, none of that damn digital grit! Midrange and bass balanced and dynamic. Audio of these Sonys is impressive.

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Topic - second TC-580 needed a lot of work... - ltman 18:11:24 04/29/24 (35)

You need to make sure they are neutered - Victor Khomenko 15:01:55 05/04/24 (34)

Damn, you were right! - ltman 09:45:33 05/10/24 (27)

Careful there... you are where I was 40 years ago - Victor Khomenko 14:24:14 05/10/24 (26)

RE: Careful there... you are where I was 40 years ago - ltman 20:20:41 05/10/24 (25)

Are you? Not really. - Victor Khomenko 04:33:21 05/11/24 (24)

RE: Are you? Not really. - ltman 13:26:02 05/11/24 (23)

Well, Sony is from different era - Victor Khomenko 15:04:32 05/11/24 (22)

RE: Well, Sony is from different era - ltman 15:29:15 05/11/24 (21)

I never use frequency counter - Victor Khomenko 15:41:23 05/11/24 (20)

RE: I never use frequency counter - ltman 10:51:15 05/13/24 (19)

RE: I never use frequency counter - Victor Khomenko 12:07:53 05/13/24 (18)

RE: I never use frequency counter - ltman 16:25:13 05/13/24 (17)

Ordered the sound card - Victor Khomenko 07:24:31 05/16/24 (4)

Re: Old PC - Inmate51 10:08:58 05/16/24 (1)

No... not quite THAT old. :) - Victor Khomenko 10:56:27 05/16/24 (0)

RE: Ordered the sound card - ltman 09:42:25 05/16/24 (1)

They are all down there - Victor Khomenko 10:54:20 05/16/24 (0)

Keep me posted, I might consider it - Victor Khomenko 04:50:38 05/14/24 (11)

RE: Keep me posted, I might consider it - ltman 10:27:02 05/14/24 (10)

RE: Keep me posted - ltman 18:48:29 05/14/24 (9)

How... - Victor Khomenko 07:12:45 06/07/24 (1)

RE: How... - ltman 07:21:44 06/07/24 (0)

RE: Keep me posted - ltman 19:27:59 05/14/24 (6)

Don't run too fast, I am right behind you! - Victor Khomenko 10:27:24 05/15/24 (5)

RE: Don't run too fast, I am right behind you! - ltman 10:41:28 05/15/24 (4)

Re: Your Graph - Inmate51 12:49:17 05/15/24 (3)

Re: Your Graph - ltman 12:54:12 05/15/24 (2)

Re: Your Graph - ltman 12:55:50 05/15/24 (1)

Different model - Victor Khomenko 16:00:47 05/15/24 (0)

RE: You need to make sure they are neutered - ltman 15:40:32 05/08/24 (5)

Baking Audio Tapes - Inmate51 09:39:33 05/09/24 (1)

RE: Baking Audio Tapes - ltman 11:43:31 05/09/24 (0)

Best most prudent advice - dump them - Victor Khomenko 04:05:16 05/09/24 (2)

RE: Best most prudent advice - dump them - ltman 11:42:59 05/09/24 (1)

That is why I mentioned... - Victor Khomenko 11:55:38 05/09/24 (0)

second TC-580 needed a lot of work...

This one came in as "non-functional" from seller so it was a relative bargain. I had planned to use it just for parts but then got it working quite well.

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