DW1992
Member
Hi Everyone,
I recently recapped the analog boards in my two Colour Classics.
One is a Mystic, the other is a stock CC.
Their logic boards were recapped months ago.
Both worked perfectly after their recaps, and the Mystic still does. However, the stock CC analog board has started emitting a buzzing sound when the CRT is powered up.
I'm nearly positive its not the fly back itself, as the noise seems to be coming from closer to the front of the machine, or perhaps the coils on the tube?
The machine still works, with a perfect picture on the screen. It jut emits this buzzing noise that ebbs up and down (hard to explain, recording below).
Here's an MP3 I made. You can hear the boot chime, then the screen powering up and the buzzing starting.
https://www.dsbbs.ca/tx/CC_Buzz_MP3.mp3
I've double checked that all the replaced capacitors are the correct values and their polarities are correct.
The Mystic's analog board (came replacement components) has no noise issue.
Any hints or suggestions greatly appreciated!
Aaron/DW
Dark Systems BBS
I recently recapped the analog boards in my two Colour Classics.
One is a Mystic, the other is a stock CC.
Their logic boards were recapped months ago.
Both worked perfectly after their recaps, and the Mystic still does. However, the stock CC analog board has started emitting a buzzing sound when the CRT is powered up.
I'm nearly positive its not the fly back itself, as the noise seems to be coming from closer to the front of the machine, or perhaps the coils on the tube?
The machine still works, with a perfect picture on the screen. It jut emits this buzzing noise that ebbs up and down (hard to explain, recording below).
Here's an MP3 I made. You can hear the boot chime, then the screen powering up and the buzzing starting.
https://www.dsbbs.ca/tx/CC_Buzz_MP3.mp3
I've double checked that all the replaced capacitors are the correct values and their polarities are correct.
The Mystic's analog board (came replacement components) has no noise issue.
Any hints or suggestions greatly appreciated!
Aaron/DW
Dark Systems BBS
