Dk Jr issues

copious

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DK Jr with 2 issues, the first is the sound. At 0 volume there's a loud hum coming from the speaker. At the first minimal volume setting, the volume is full blast during game play. In attract mode if I turn up the volume adj, there's a strange noise that sounds like a fast sine wave.
The other thing is the monitor. The left side of the screen seemed to be "srunged" up so I couldn't see the player1 score or the list of high scores. After playing with some adjustments, I found that the vert. size adjustment gave me the full screen but the picture looks narrow to me. I also noticed the left lower corner of the screen was slightly wavy. The monitor has nice color and brightness for the age.
 
DK Jr with 2 issues, the first is the sound. At 0 volume there's a loud hum coming from the speaker. At the first minimal volume setting, the volume is full blast during game play. In attract mode if I turn up the volume adj, there's a strange noise that sounds like a fast sine wave.
The other thing is the monitor. The left side of the screen seemed to be "srunged" up so I couldn't see the player1 score or the list of high scores. After playing with some adjustments, I found that the vert. size adjustment gave me the full screen but the picture looks narrow to me. I also noticed the left lower corner of the screen was slightly wavy. The monitor has nice color and brightness for the age.


Cap the monitor and sound board, replace the volume pot and be sure to replace the filter cap. the weird sine wave sound is normal for these machines.
 
Do a search for "Nintendo" "hum" and you should find some info.
 
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