Bally 873 pay to little for jackpot

[JanGbg]

My Bally 873 work absolutly perfect in normal case. But if I got Three "7" on one line I should got 200 coins. Often i got 150-175 coins, if I push a Little och the mashine it continue to pay out some more. Last week I got Three "7" on center line, I only got about 175 coins. I took a pic of the hopper. Anyone who see something wrong? Or any other ideas?

[DavidLee]

Noticed the contacts stopped early on the 200 pay contact strip from what I see in the photo.
If the contacts and receiver metal strip are dirty the machine stop when the contacts loose continuity in the general area.
Thus giving a random short pay.
First would be to check for continuity between the contacts and metal strip with the contacts in that same general area.
Next, continuity or no continuity ( take note of the results ) then clean the contacts. Check for continuity, if nothing the contact might need to be adjusted to add more pressure to the metal receiver strip. It also looks like the contacts are riding on the edge.
Compare with other contacts.
   

[Amechanic]

David is correct. Make sure the wiper fingers and wiper board contact pads are clean. You can clean them with a Q-Tip and a mild cleaner. Also make sure that the wiper fingers have good spring tension. I have attached a pic of what screw would need to be loosened to adjust that 200 coin wiper.

Did your game payout correct before on the 200 coin jackpot?