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Old 21st May 2014, 07:36 AM   #1
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Join Date: Apr 2013
Location: Arkansas
Default Need Help w/Sony TC755 Reel To Reel

Greetings to all -
After having two ebay-purchased reel to reel tape decks damaged by FedEx in transit, I decided to try to find one locally. Felt really fortunate to find a mint-looking Sony TC755 nearby (this is the big shiny 10.5" unit). At the owner's place there were no reels to check it with, but the reels and capstan functioned, as did all the solenoid controls. Took it home, flipped the reel size switch to 7",loaded it with seven inch reels and -- nothing. The solenoids click but the reels will not turn in any mode. Switched over to 10.5" reels. Now the solenoids click, the capstan engages, and the reels nudge, but will not turn. I'm hunting desperately for a qualified technician in the Little Rock, Arkansas area, but in the meantime does anybody have any guesses as to what might be the problem? The machine is new looking inside, too. Does anybody have suggestions for any very good reel to reel technicians that are honest and reliable?
(Since this is my first post in DIY, here's a little background on me: I'm sixty one years old and disabled. My friend and I are trying to replace the gear we owned - or wished we'd owned - in the 1970s. In the mid-seventies while in the Army in Germany I bought my dream audio system: a Pioneer SX-950 receiver (the black European model); Bose 901 Series II speakers; a Technics SL1300 turntable w/Shure V15-III; and a Teac A3300 reel to reel. So far, I've replaced them with a Pioneer SX750 and Sansui 5000X receiver (sold the Sansui today); Pioneer PL400 turntable w/new Shure M97xE cartridge; and the previously mentioned Sony reel to reel. Speakers: I've auditioned a number of vintage and new loudspeakers. Was using a pair of Smaller Advents until one of the woofs retired on me. But I'm most pleased with the speakers I've built myself. Of the half dozen pairs I've built so far (fifteen inch models all the way down to 4" models), I'm mostly using a very simple two way, 8" set. I can listen to and enjoy them for hours on end. Thanks to all the guys on the Parts Express Tech Talk board.
--Once again, thanks in advance for any advice or recommendations on the Sony reel unit.
GeeDeeEmm
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Old 21st May 2014, 07:50 AM   #2
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You can find the Service Manual here,

Sony TC-755 Manual - Three Head Tape Recorder - HiFi Engine

jer
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Old 21st May 2014, 08:22 AM   #3
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Location: Los Angeles
I still have a TC-755 in the garage and I service Sony broadcast gear. Sony uses BAD lubricants. Oil turn to glue and greases turn into mud. I don't use Sony lubes for that reason. I use NyeOil II and Rheolube 363 and 368AX.
It will likely need to be disassembled cleaned out and re-lubed. It's not for the feint of heart but it can be done.

More annoying, the F&F heads fail WAY too early. Under a microscope it looks like potholes. On a scope it rolls off the high end.

I'll also have to 'bake' the tapes to get rid of sticky shed.

G
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Old 21st May 2014, 08:23 PM   #4
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Default OT

Quote:
Originally Posted by stratus46 View Post
.. and I service Sony broadcast gear.
stratus46, do you also service Sony digital broadcast gear?

Thanks.
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Old 21st May 2014, 11:24 PM   #5
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Location: Jeffersonville, Indiana USA
I've pretty much given up trying to service my Sony reel to reel tape decks due to failure of the tape braking and tensioning systems. I think these involve rubber and felt components, and I'm not competent to make replacements. The rubber capstan pressure wheel is out there to loom over my thoughts, too. There appears to be no parts source. Stratus46 may be on to something about lubricants, as these failures to control tape movements started 30 years ago in the eighties. I can't get new RtoR tape anyway, but it would be nice to play my old tapes into some newer format.
I'm trying to work up PC's as recording machines, using non-proprietary software, without getting that effort all together either. Microsoft and Apple are off my list, they keep updating stuff without permission. Microsoft killed the last two used PC Windows systems I bought with "updates". I've got a number for a legal Win XP now, just in time for Microsoft to quit offering it. The computer with that number on the back came with Win 7, which was obviously not legal or the update number is lost, and that op system was destroyed by MS. I'm trying to use ubuntu studio, but have had a mismatch between the PC's I buy and the speed required by the software package distributed. Just in time for outdoor weather projects, I found a DVD recording drive which cuts the backup of data time before installing new op system from a week (and 18 CDs) to a couple of hours and two DVDs. People on pianostreet.com recommend a proprietary software package as having better sound than anything for free, but again that company only supports MS and Apple, not Linux.
People record all the time with cellphones, but the sound I hear on youtube is truly vile. I got much better results with my Sony TC355 back in the day. People on this thread say you can still get parts for Revox reel to reel, so if you have a lot of precious original tapes from the 1970's, look for one of those. Last year I found the irreplaceable off the air track I had only on a reel in a Rhino CD, so my sense of urgency has diminished (13th Floor Elevators, Slip inside this house ).
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Last edited by indianajo; 21st May 2014 at 11:30 PM.
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Old 22nd May 2014, 02:51 PM   #6
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Quote:
Originally Posted by elektroj View Post
stratus46, do you also service Sony digital broadcast gear?

Thanks.
I work on BVW-7x, BVH-2xxx, DVW-(a)500, DVW-(m)2000, and SRW=5x00 NTSC and PAL, Ampex AVR 1/2/3 VPR-2/3/6.

It takes a whole lot of capacitors to keep those BVW and DVWs happy.

G
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Old 22nd May 2014, 03:00 PM   #7
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Location: Los Angeles
Sony uses some odd synthetic cloth/rubber for the brake bands on that machine. I took an old wallet and cut out some leather strips and used contact cement to hold it on the stainless steel bands. Works better than new.

For recording check out the Tascam DR-05 and DR-07 mk II. It will work better than the PC, cost a LOT less and give you files you can work on with Audacity (free) or my favorite Adobe Audition 3. ProTools is excellent also.

G
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