Specs: K7000 447 19" Wells Gardner Standard Resolution Chassis with a 456 Neck Board
Issue: What appears to be a horizontal sync problem
Back Story: This chassis was dead in the beginning and came out of a Akari III. Removed the chassis and went through standard testing procedures. Found the HOT to be bad, and flyback cracked. Went ahead and capped it, new flyback, and HOT, I think I may have had a bad diode (can't remember). All in all, fired it up on the bench with the TPG, all worked perfect. Took it back to the arcade and installed and it looked like the images below..... Tried to adjust everything out and still same result. Removed the chassis brought it back to the bench and same result with my test CRT.
What I did after: Swapped the Horizontal Hold and Pos Pots. Ran through all standard tests, reflowed header pins again and various other points. Still exact same result. You will see two images, one blue and one red. The red image is with both of the sync pins connected (9 and 10), and the blue is just one connected (10). I tested a couple other 447 chassis with the TPG in the 9 and 10 and the 10 config and they work perfect.
Maybe? IC issue or bad flyback? If any other details are needed let me know. I have loaded a few additional images as it may be asked of me. I submit to the gurus!
Thanks in advance,
Kynan
Issue: What appears to be a horizontal sync problem
Back Story: This chassis was dead in the beginning and came out of a Akari III. Removed the chassis and went through standard testing procedures. Found the HOT to be bad, and flyback cracked. Went ahead and capped it, new flyback, and HOT, I think I may have had a bad diode (can't remember). All in all, fired it up on the bench with the TPG, all worked perfect. Took it back to the arcade and installed and it looked like the images below..... Tried to adjust everything out and still same result. Removed the chassis brought it back to the bench and same result with my test CRT.
What I did after: Swapped the Horizontal Hold and Pos Pots. Ran through all standard tests, reflowed header pins again and various other points. Still exact same result. You will see two images, one blue and one red. The red image is with both of the sync pins connected (9 and 10), and the blue is just one connected (10). I tested a couple other 447 chassis with the TPG in the 9 and 10 and the 10 config and they work perfect.
Maybe? IC issue or bad flyback? If any other details are needed let me know. I have loaded a few additional images as it may be asked of me. I submit to the gurus!
Thanks in advance,
Kynan




