From: amdx@knology.net   
      
   On 7/10/2022 8:30 PM, Another idiot on google groups wrote:   
   > Charles Lucas  wrote:   
   >> 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).   
   > 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?   
   >   
   > 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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