I wonder if anyone would be so kind to email me a circuit diagram for the sony
TCD-D7 dat recorder

Lew wrote:

I wonder if anyone would be so kind to email me a circuit diagram
for the sony TCD-D7 dat recorder

It is a very complex diagram which requires perhaps 20+ pages to copy.
There are a number of different printed circuit boards each of which
carries numerous integrated circuits and other parts. The circuit
diagram alone wouldn't give you enough information to repair or modify
the deck--there are specific instructions to follow when aligning it.

Sony publishes a service manual containing all this information. I
think you need to order it from Sony's Parts department.

In article ,
Lew wrote:
I wonder if anyone would be so kind to email me a circuit diagram for the
sony
TCD-D7 dat recorder

Wow, you must have a big e-mail box.

I think you're going to have to spend the $20 and order the service manual
from Sony.

Those things are NO FUN to work on, I warn you, though.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."






Those things are built like a watch, with microscopic screws.

I have a larger model, (TCD D10 PRO II), the service manual and there is no way
that I will open up that thing any further than to clean the head.

The flat service on the PRO II is $435, and I consider it money well spent.

since the D7 is a consumer unit, i don't know how (or if) they are serviced at
Sony.
Richard H. Kuschel
"I canna change the law of physics."-----Scotty

Richard Kuschel wrote:

Those things are built like a watch, with microscopic screws.

I have a larger model, (TCD D10 PRO II), the service manual and there
is no way that I will open up that thing any further than to clean
the head. The flat service on the PRO II is $435, and I consider it
money well spent. since the D7 is a consumer unit, i don't know how
(or if) they are serviced at Sony.

Having an older TCD-D10 Pro (not II), I agree with you.

Service on the Sony consumer units works the same way, basically:
Since the D7 is an old model, Sony charges a flat fee for all work
regardless of how simple or complicated it may be. The fee for the
consumer DAT recorders is lower, however. And it's a good thing,
too--the TCD-D7 and -D8, which use a rather fiddly miniature transport,
are prone to reel motor problems in their old age even if they're used
very carefully and never dropped onto a concrete floor even once.

By the way, hold on to your D10's AC power supply; you can't get a
replacement, even though the D10 Pro II is still a current model!

By the way, hold on to your D10's AC power supply; you can't get a
replacement, even though the D10 Pro II is still a current model!



I happen to have two of the power supplies.

I use one for charging if I need to.

The only problem I have ever had with the power supplies is breaking the AC
line where it enters the box. Just from packing and repacking.

Pretty easy to fix.


Richard H. Kuschel
"I canna change the law of physics."-----Scotty

Unless you are both an ace bench tech and a masochist, don't try to
fix your D7. They are made the way the Sony camcorders are, tightly
packed, fragile on the inside, highly complex, and require some
specialized tools. If the machine is a basket case and you want to
satisfy your curiosity, go ahead. If you want it to work, send it to
Sony.

Philip Perkins

On or about 9 Jul 2003 10:29:07 -0700, Philip Perkins allegedly wrote:

Unless you are both an ace bench tech and a masochist, don't try to
fix your D7. They are made the way the Sony camcorders are, tightly
packed, fragile on the inside, highly complex, and require some
specialized tools. If the machine is a basket case and you want to
satisfy your curiosity, go ahead. If you want it to work, send it to
Sony.

I'd agree. I've witnessed an old ace tech friend disemboweling a D7 to
clear a jammed mechanism. It was an all day job, and there was only this
tiny scrap of a mechanism left before he got access to the part that was
the problem. The machine looked at least 90% disassembled. After an ever
so slight tweak to reduce the chances of it jamming again, he reassembled
it and a couple of hours later we were amazed when it still worked. I've
done a lot of fine work myself, including working on D10's several times,
but I would not be game to do what he succeeded at with the D7.



Noel Bachelor noelbachelorAT(From:_domain)
Language Recordings Inc (Darwin Australia)

Unless you are both an ace bench tech and a masochist, don't try to
fix your D7. They are made the way the Sony camcorders are, tightly
packed, fragile on the inside, highly complex, and require some
specialized tools. If the machine is a basket case and you want to
satisfy your curiosity, go ahead. If you want it to work, send it to
Sony.

I'd agree. I've witnessed an old ace tech friend disemboweling a D7 to
clear a jammed mechanism. It was an all day job, and there was only this
tiny scrap of a mechanism left before he got access to the part that was
the problem. The machine looked at least 90% disassembled. After an ever
so slight tweak to reduce the chances of it jamming again, he reassembled
it and a couple of hours later we were amazed when it still worked. I've
done a lot of fine work myself, including working on D10's several times,
but I would not be game to do what he succeeded at with the D7.

I've had a D7 open a few times, it's a bit daunting, but there's plenty of
info on the web and the transport is more forgiving than it looks. I've
reset the tracking and put shims in to compensate for a twised loading
mechanism, that got another 120 hours out of that unit before some new
unexplained issues have come up. I might still wax the belts (apply Pledge
using Q-tips) and maybe roughen the head surface, but I've got a Nomad
Jukebox 3 now so the D7 would only be used for supplementary tracks. I can
get a D7 open and reassembled in about 5 minutes now though.