I am working on my aunts vcr and it just started to play colorCheck the luminance/chrominance [luma/chroma] circuitry that controls the picture output
tapes in black and white. I assumed it was just dirty and needed
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things
that would cause this?
Thanks
Peter
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Peter Shabino Graduated Electrical Engineering
wi...@home.com Michigan Technological University
2015 41st ST. NW apt. F13 Now at
Rochester, MN 55901 IBM card test division
On Saturday, April 15, 2000 at 2:00:00 AM UTC-5, wire wrote:
I am working on my aunts vcr and it just started to play color tapes
in black and white. I assumed it was just dirty and needed
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things that
would cause this?
Thanks
Peter
Check the luminance/chrominance [luma/chroma] circuitry that controls
the picture output in black and white and color. I would check the
3.58 MHz crystal oscillator also on the video output as well. This
things help with the color processing. Usually, it is an IC or
integrated circuit (could even be a flatpack) that controls this or
some discreet component like a transistor, resistor, or cap. that
activates the IC).
Charles Lucas <charles...@gmail.com> wrote:
On Saturday, April 15, 2000 at 2:00:00 AM UTC-5, wire wrote:Do you really think that after over 22 years, the poster of the article
I am working on my aunts vcr and it just started to play color tapesCheck the luminance/chrominance [luma/chroma] circuitry that controls
in black and white. I assumed it was just dirty and needed
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things that
would cause this?
Thanks
Peter
the picture output in black and white and color. I would check the
3.58 MHz crystal oscillator also on the video output as well. This
things help with the color processing. Usually, it is an IC or
integrated circuit (could even be a flatpack) that controls this or
some discreet component like a transistor, resistor, or cap. that activates the IC).
to which you just replied is still waiting around for your answer?
The article to which you repled was posted April 15, 2000.
On Sunday, July 10, 2022 at 8:30:31 PM UTC-5, Another idiot on google groups wrote:posted a reply this late for archival purposes, as VCR's are outmoded now, for the most part. Besides, everyone else has had 22 years to provide some sort of answer (however simple or complex to solve the problem). Some of us when we service peoples'
Charles Lucas <charles...@gmail.com> wrote:
On Saturday, April 15, 2000 at 2:00:00 AM UTC-5, wire wrote:Do you really think that after over 22 years, the poster of the article
I am working on my aunts vcr and it just started to play color tapesCheck the luminance/chrominance [luma/chroma] circuitry that controls the picture output in black and white and color. I would check the
in black and white. I assumed it was just dirty and needed
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things that
would cause this?
Thanks
Peter
3.58 MHz crystal oscillator also on the video output as well. This things help with the color processing. Usually, it is an IC or integrated circuit (could even be a flatpack) that controls this or
some discreet component like a transistor, resistor, or cap. that activates the IC).
to which you just replied is still waiting around for your answer?
The article to which you repled was posted April 15, 2000.I saw the date (I can read) and I am truly sorry if my outrageously late reply deeply offends you somehow. I never expected either of us to wait and I am sure the original poster never expect me nor my specific answer to be available at any time. I
Have a great day. God Bless.
Charles Lucas
On Monday, July 11, 2022 at 8:08:02 PM UTC-4, charles...@gmail.com wrote:posted a reply this late for archival purposes, as VCR's are outmoded now, for the most part. Besides, everyone else has had 22 years to provide some sort of answer (however simple or complex to solve the problem). Some of us when we service peoples'
On Sunday, July 10, 2022 at 8:30:31 PM UTC-5, Another idiot on google groups wrote:
Charles Lucas <charles...@gmail.com> wrote:
On Saturday, April 15, 2000 at 2:00:00 AM UTC-5, wire wrote:Do you really think that after over 22 years, the poster of the article to which you just replied is still waiting around for your answer?
I am working on my aunts vcr and it just started to play color tapes >> in black and white. I assumed it was just dirty and neededCheck the luminance/chrominance [luma/chroma] circuitry that controls the picture output in black and white and color. I would check the 3.58 MHz crystal oscillator also on the video output as well. This things help with the color processing. Usually, it is an IC or integrated circuit (could even be a flatpack) that controls this or some discreet component like a transistor, resistor, or cap. that activates the IC).
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things that
would cause this?
Thanks
Peter
The article to which you repled was posted April 15, 2000.I saw the date (I can read) and I am truly sorry if my outrageously late reply deeply offends you somehow. I never expected either of us to wait and I am sure the original poster never expect me nor my specific answer to be available at any time. I
Need a model number to do that. everything is specific to the model. Also,check any and all of those things- if not sure. A goodHave a great day. God Bless.
Charles LucasYou didn't provide any specific help at all, unless you want to consider 'check the color circuitry' and 'it could be an IC, transistor, crystal, resistor, or capacitor' as helpful.
Charles Lucas <charlesandmilly@gmail.com> wrote:
On Saturday, April 15, 2000 at 2:00:00 AM UTC-5, wire wrote:Do you really think that after over 22 years, the poster of the article
I am working on my aunts vcr and it just started to play color tapesCheck the luminance/chrominance [luma/chroma] circuitry that controls
in black and white. I assumed it was just dirty and needed
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things that
would cause this?
Thanks
Peter
the picture output in black and white and color. I would check the
3.58 MHz crystal oscillator also on the video output as well. This
things help with the color processing. Usually, it is an IC or
integrated circuit (could even be a flatpack) that controls this or
some discreet component like a transistor, resistor, or cap. that
activates the IC).
to which you just replied is still waiting around for your answer?
The article to which you repled was posted April 15, 2000.
The article to which you repled was posted April 15, 2000.
With a problem like that, my first shot would be to sparingly,
start hitting single parts in that area with cold spray, and see if the
color came back.
If not, then start troubleshooting. That even had success during the 1980s!
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This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
The article to which you repled was posted April 15, 2000.With a problem like that, my first shot would be to sparingly,
start hitting single parts in that area with cold spray, and see if the
color came back.
If not, then start troubleshooting. That even had success during the 1980s! >>
Another technique is to heat the IC up with a hot hair dryer to see if you can get
it to act up that way. This worked during the 1980's also. Overheating microprocessors
beyond their temperature coefficients can be dodgy... They can be tricky.
On Sat, 6 Aug 2022 11:46:32 -0700 (PDT), Charles Lucas ><charlesandmilly@gmail.com> wrote:
The article to which you repled was posted April 15, 2000.With a problem like that, my first shot would be to sparingly,
start hitting single parts in that area with cold spray, and see if the
color came back.
If not, then start troubleshooting. That even had success during the 1980s! >>>
Another technique is to heat the IC up with a hot hair dryer to see if you can get
it to act up that way. This worked during the 1980's also. Overheating microprocessors
beyond their temperature coefficients can be dodgy... They can be tricky.
I used a soldering iron without any solder to heat individual
components, hair dryers tended to heat everything up at once. That was
a long time before the 1980's
Steve
On Saturday, April 15, 2000 at 2:00:00 AM UTC-5, wire wrote:The problem can be open filter capacitors in the power supply.
I am working on my aunts vcr and it just started to play colorCheck the luminance/chrominance [luma/chroma] circuitry that controls the picture output
tapes in black and white. I assumed it was just dirty and needed
cleaning. Took it apart and for the most part it is very clean.
cleaned up what little dirt there was and reassembled it. Still
plays tapes in black and white. What are some common things
that would cause this?
Thanks
Peter
--
!!!!!!!!!!!Go Build a Robot!!!!!!!!!!!
! http://members.home.net/wireb/ !
!!!!!!!!!!!Go Build a Robot!!!!!!!!!!!
Peter Shabino Graduated Electrical Engineering
wi...@home.com Michigan Technological University
2015 41st ST. NW apt. F13 Now at
Rochester, MN 55901 IBM card test division
in black and white and color. I would check the 3.58 MHz crystal oscillator also on the video
output as well. This things help with the color processing. Usually, it is an IC or integrated
circuit (could even be a flatpack) that controls this or some discreet component like a transistor,
resistor, or cap. that activates the IC).
The problem can be open filter capacitors in the power supply.
Excessive hash on the B+ busses can kill the color circuitry.
The type is AKAI VS-3. I repaired the servo part and the power part did not work. Now it starts, plays, spins. The head drum was also bad, so I put in a new original one. Now there is a picture, but it is black and white and jumps a little. I can'tHello! I have read all your posts and you are absolutely right. Unfortunately, there are always such people who qualify the helpers. Well, I also learned a lot from what was written here, at the hobby level I repair a VHS VCR, which also has no color.
Thank you in advance for your help.
Those old Akais had lots of electrolytic caps that get weak with age. Try heating the signal boards with a heat gun to see if the color returns. If it does, you're going to have to recap that unit if you intend to keep it.
On 1/9/24 12:24, ohg...@gmail.com wrote:The type is AKAI VS-3. I repaired the servo part and the power part did not work. Now it starts, plays, spins. The head drum was also bad, so I put in a new original one. Now there is a picture, but it is black and white and jumps a little. I can't
Hello! I have read all your posts and you are absolutely right. Unfortunately, there are always such people who qualify the helpers. Well, I also learned a lot from what was written here, at the hobby level I repair a VHS VCR, which also has no color.
Thank you in advance for your help.
Those old Akais had lots of electrolytic caps that get weak with age. Try heating the signal boards with a heat gun to see if the color returns. If it does, you're going to have to recap that unit if you intend to keep it.
Can you explain the heat gun technique for bad caps... how does it work?When you heat up a bad cap, the ESR goes down and the capacitance goes
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