My Sony DTC-690 DAT Recorder

richardsymes · 20th July 2006, 10:12 PM

Hi, It's brain picking time! I have a Sony DTC-690 DAT machine which will ( in this order!), accept a tape, thread up a tape, play a tape, fast forward a tape and rewind a tape, BUT - when I try to eject the tape, the lace up arms retract but the tape does not wind back into it's housing. The unit tries several times to eject and when it eventually does eject there is a loop of tape syill outside it's shell. This is very frustrating and I would be most grateful for any clues to a solution! Over to you and Thanks in advance!.

jahonen · 21st July 2006, 07:21 PM

I don't know if DAT machines have mode switch in the mechanics, like VCR's do. I would try cleaning/replacing the switch if one exists. Common source of strange behaviour with VCRs is just the mode switch being flaky.

Regards,
Janne

richardsymes · 21st July 2006, 09:45 PM

Hi, Thanks for the suggestion. That seems a logical place to start. DAT mechanics are a lot smaller than a VCR but I'll have a go!

bluesmoke · 21st July 2006, 10:07 PM

Definitely a good idea, as well as the reel, and possibly tension sensors (if any). Had a JVC VCR that did the exact same thing, was the feed reel sensor. Wouldn't pull the slack in before ejecting. Everything else on it was fine.

Had a Casio portable DAT at one point (miss it dearly, sold it for some stupid reason), on rare occasion would not retract the tape in enough before snapping the cover on eject. But was too rare to even be of concern. Getting that small, the slightest glitch can be nasty. Also components that size tend to be based more on pre-fab relatively precision fittings and tensionings, rather than active sensors and compensation. (may not be related, but also look for dirty brakes)

richardsymes · 21st July 2006, 10:36 PM

Great, at least I'm finding some common ground to work from. I'm a bit reluctant to dismantle the mechanics too much (parts flying out and vanishing forever, that sort of thing!). A service manual would help but not sure where to get one.

docfin · 21st July 2006, 10:47 PM

Service manual for Sony DTC-690 available here

richardsymes · 23rd July 2006, 12:29 PM

Hi, got the manual, found the magic 'tweaker' and the tape now ejects properly. Unfortunately rewind is now very sluggish and I cannot sort this one! Ah well. can't have evrything I suppose. Thanks to all who replied.

Regards,

20th July 2006, 10:12 PM	#1
richardsymes diyAudio Member Join Date: Mar 2005 Location: Derby	My Sony DTC-690 DAT Recorder Hi, It's brain picking time! I have a Sony DTC-690 DAT machine which will ( in this order!), accept a tape, thread up a tape, play a tape, fast forward a tape and rewind a tape, BUT - when I try to eject the tape, the lace up arms retract but the tape does not wind back into it's housing. The unit tries several times to eject and when it eventually does eject there is a loop of tape syill outside it's shell. This is very frustrating and I would be most grateful for any clues to a solution! Over to you and Thanks in advance!. __________________ Richard

21st July 2006, 09:45 PM	#3
richardsymes diyAudio Member Join Date: Mar 2005 Location: Derby	Hi, Thanks for the suggestion. That seems a logical place to start. DAT mechanics are a lot smaller than a VCR but I'll have a go! __________________ Richard

21st July 2006, 10:36 PM	#5
richardsymes diyAudio Member Join Date: Mar 2005 Location: Derby	Great, at least I'm finding some common ground to work from. I'm a bit reluctant to dismantle the mechanics too much (parts flying out and vanishing forever, that sort of thing!). A service manual would help but not sure where to get one. __________________ Richard

23rd July 2006, 12:29 PM	#7
richardsymes diyAudio Member Join Date: Mar 2005 Location: Derby	Hi, got the manual, found the magic 'tweaker' and the tape now ejects properly. Unfortunately rewind is now very sluggish and I cannot sort this one! Ah well. can't have evrything I suppose. Thanks to all who replied. Regards, __________________ Richard

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21st July 2006, 07:21 PM	#2
jahonen diyAudio Member Join Date: Jan 2002 Location: Kuopio, Finland	I don't know if DAT machines have mode switch in the mechanics, like VCR's do. I would try cleaning/replacing the switch if one exists. Common source of strange behaviour with VCRs is just the mode switch being flaky. Regards, Janne

21st July 2006, 10:07 PM	#4
bluesmoke diyAudio Member Join Date: Mar 2006 Location: Great White North	Definitely a good idea, as well as the reel, and possibly tension sensors (if any). Had a JVC VCR that did the exact same thing, was the feed reel sensor. Wouldn't pull the slack in before ejecting. Everything else on it was fine. Had a Casio portable DAT at one point (miss it dearly, sold it for some stupid reason), on rare occasion would not retract the tape in enough before snapping the cover on eject. But was too rare to even be of concern. Getting that small, the slightest glitch can be nasty. Also components that size tend to be based more on pre-fab relatively precision fittings and tensionings, rather than active sensors and compensation. (may not be related, but also look for dirty brakes)

21st July 2006, 10:47 PM	#6
docfin Account Disabled Join Date: Apr 2006 Location: under the bridge	Service manual for Sony DTC-690 available here

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