PLEASE help, SONY VCR problem

[Gary Noland]

Hi,
I'm having some problems with my Sony VCR. It's model # SLV-750HF
(one of the best VCRs Sony has ever manufactured). The problem is
that the "high speed rewind" does not work. The regular rewind,
however seems to work for a few seconds but then the unit completely
stops. Here are two sets of error codes that I receive: LH 16M 02S
and LH 07M 02S (please note that the H signifies hours, M is minutes,
and S is seconds).

I think that one of the reel motion sensors might be faulty.

The problem is that I don't have the part numbers/list for the
replacement parts that I need and I am not exactly sure where these
parts are located in the VCR. Could someone please provide me with
the service manual for this particular model? I would greatly
appreciate it.

Thanks in advance,
Gary Noland

My email is johnjfk99@msn.com

 

[LASERandDVDfan]

Hi,
I'm having some problems with my Sony VCR. It's model # SLV-750HF
(one of the best VCRs Sony has ever manufactured). The problem is
that the "high speed rewind" does not work.

How does it not work?

Does the machine do anything short of what it's supposed to do or does it just
sit there?

The regular rewind,
however seems to work for a few seconds but then the unit completely
stops.

As you mentioned, it is possible that the motion sensor may be at fault.
However, it is also possible, and perhaps more likely, that the mode switch may
require cleaning or replacement.

Of course, these are guesses. A clear and accurate determination of the
problem cannot be made without actually examining the machine.

I may be in a position to help you as I do have repair experience with the
particular chassis that your VCR uses. I have serviced my own SVO-160,
SLV-575UC, and SLV-750HF decks. I have also serviced 2 more SLV-575UC decks
and one SLV-676UC. I also have a plethora of spare parts for these machines.
- Reinhart

 

[Gary]

Hi,

Thank you for your response. I appreciate your help. Where exactly
is the mode switch located on the SLV-750HF VCR? How should I go
about cleaning it? Do you by any chance have a service manual in PDF
format for this particular VCR that you can send to me? Thanks for
your help.



-Gary Noland





laseranddvdfan@aol.com (LASERandDVDfan) wrote in message news:<20040324174228.17173.00000037@mb-m23.aol.com>...

Hi,
I'm having some problems with my Sony VCR. It's model # SLV-750HF
(one of the best VCRs Sony has ever manufactured). The problem is
that the "high speed rewind" does not work.

How does it not work?

Does the machine do anything short of what it's supposed to do or does it just
sit there?

The regular rewind,
however seems to work for a few seconds but then the unit completely
stops.

As you mentioned, it is possible that the motion sensor may be at fault.
However, it is also possible, and perhaps more likely, that the mode switch may
require cleaning or replacement.

Of course, these are guesses. A clear and accurate determination of the
problem cannot be made without actually examining the machine.

I may be in a position to help you as I do have repair experience with the
particular chassis that your VCR uses. I have serviced my own SVO-160,
SLV-575UC, and SLV-750HF decks. I have also serviced 2 more SLV-575UC decks
and one SLV-676UC. I also have a plethora of spare parts for these machines.
- Reinhart

Hi,

Thank you for your response. I appreciate your help. Where exactly
is the mode switch located on the SLV-750HF VCR? How should I go
about cleaning it? Do you by any chance have a service manual in PDF
format for this particular VCR that you can send to me? Thanks for
your help.



-Gary Noland

 

[LASERandDVDfan]

Where exactly
is the mode switch located on the SLV-750HF VCR?

It is located underneath a junction board on the bottom of the chassis. It is
a rotary switch driven by one of the gears of the advance mechanism. This is a
fairly difficult repair given the overall complexity of the chassis assembly.

How should I go
about cleaning it?

First, you have to get the junction board out of the way. It's the board which
distributes power to the capstan motor, drum motor, and mechanism advance
motor. It also powers the IR LED for the end-of-tape sensors on the sides,
which are also connected to the junction board.

After that is done, you have to take the switch out, take the rotor off the
switch, clean the contacts with alcohol, then polish the contacts using very
fine finishing sand paper, then you clean it with alcohol again and apply a
light coat of household oil to lubricate the switch and inhibit corrosion. The
switch must be reinserted correctly in order to ensure that the mode switch
will be in proper timing with the deck advance mechanism.

Do you by any chance have a service manual in PDF
format for this particular VCR that you can send to me?

Unfortunately, no. - Reinhart

 

[Mark D. Zacharias]

Much better way: use a fiber-glass "nick-sander" brush, also known as a
"prep-pen", available from auto parts stores. You wouldn't believe how they
remove tarnish from these switches. Looks like a pen or mechanical pencil,
cheap, and they last almost forever in these applications.

Mark Z.

clean the contacts with alcohol, then polish the contacts >using very
fine finishing sand paper,

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"LASERandDVDfan" <laseranddvdfan@aol.com> wrote in message
news:20040326230417.19505.00000165@mb-m03.aol.com...

Where exactly
is the mode switch located on the SLV-750HF VCR?

It is located underneath a junction board on the bottom of the chassis.
It is
a rotary switch driven by one of the gears of the advance mechanism. This
is a
fairly difficult repair given the overall complexity of the chassis
assembly.

How should I go
about cleaning it?

First, you have to get the junction board out of the way. It's the board
which
distributes power to the capstan motor, drum motor, and mechanism advance
motor. It also powers the IR LED for the end-of-tape sensors on the
sides,
which are also connected to the junction board.

After that is done, you have to take the switch out, take the rotor off
the
switch, clean the contacts with alcohol, then polish the contacts using
very
fine finishing sand paper, then you clean it with alcohol again and apply
a
light coat of household oil to lubricate the switch and inhibit corrosion.
The
switch must be reinserted correctly in order to ensure that the mode
switch
will be in proper timing with the deck advance mechanism.

Do you by any chance have a service manual in PDF
format for this particular VCR that you can send to me?

Unfortunately, no. - Reinhart

 

[Leonard Caillouet]

Another handy tool that works great for these is a #2.5 pencil. A little
contact cleaner and a point flattened to fit the tracks and you can polish
them nicely with no scratching or excessive wear.

Leonard

"Mark D. Zacharias" <mzacharias@yis.us> wrote in message
news:c43mmh$2diott$1@ID-180484.news.uni-berlin.de...

Much better way: use a fiber-glass "nick-sander" brush, also known as a
"prep-pen", available from auto parts stores. You wouldn't believe how
they
remove tarnish from these switches. Looks like a pen or mechanical pencil,
cheap, and they last almost forever in these applications.

Mark Z.

clean the contacts with alcohol, then polish the contacts >using very
fine finishing sand paper,

--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"LASERandDVDfan" <laseranddvdfan@aol.com> wrote in message
news:20040326230417.19505.00000165@mb-m03.aol.com...
Where exactly
is the mode switch located on the SLV-750HF VCR?

It is located underneath a junction board on the bottom of the chassis.
It is
a rotary switch driven by one of the gears of the advance mechanism.
This
is a
fairly difficult repair given the overall complexity of the chassis
assembly.

How should I go
about cleaning it?

First, you have to get the junction board out of the way. It's the
board
which
distributes power to the capstan motor, drum motor, and mechanism
advance
motor. It also powers the IR LED for the end-of-tape sensors on the
sides,
which are also connected to the junction board.

After that is done, you have to take the switch out, take the rotor off
the
switch, clean the contacts with alcohol, then polish the contacts using
very
fine finishing sand paper, then you clean it with alcohol again and
apply
a
light coat of household oil to lubricate the switch and inhibit
corrosion.
The
switch must be reinserted correctly in order to ensure that the mode
switch
will be in proper timing with the deck advance mechanism.

Do you by any chance have a service manual in PDF
format for this particular VCR that you can send to me?

Unfortunately, no. - Reinhart

 

[LASERandDVDfan]

Much better way: use a fiber-glass "nick-sander" brush, also known as a
"prep-pen", available from auto parts stores. You wouldn't believe how they
remove tarnish from these switches.

It wouldn't take much, I'd imagine.

I would say that using the nick-sander is a better way. I always had to mind
how I use the sandpaper to ensure that I don't damage the switch in the process
of removing the corrosion.

Thanks for the pointer. - Reinhart

 

[Asimov]

"LASERandDVDfan" bravely wrote to "All" (29 Mar 04 02:55:34)
--- on the heady topic of "Re: PLEASE help, SONY VCR problem"

LA> From: laseranddvdfan@aol.com (LASERandDVDfan)

Much better way: use a fiber-glass "nick-sander" brush, also known as a
"prep-pen", available from auto parts stores. You wouldn't believe how they
remove tarnish from these switches.

LA> It wouldn't take much, I'd imagine.

LA> I would say that using the nick-sander is a better way. I always had
LA> to mind how I use the sandpaper to ensure that I don't damage the
LA> switch in the process of removing the corrosion.

LA> Thanks for the pointer. - Reinhart

I use a pink pearl pencil eraser to rub off surface films. I think it
was even recommended in an old computer service manual.