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Zaccaria/Associated Leisure Hyper Sports Maintenance 2021

27/05/2022 - Game PCB #001 repair

Hyper Sports game PCB on the bench

Pre-show testing discovered sprite corruption and the game PCB was removed for repair. On the bench, the Shoestring test ROM was fitted that confirmed ROM and RAM tested OK. In game mode using a video probe found the data bus of ICs H8 & H9 (2214) noisy compared to ICs J8 & J9 (2114). Comparing ICs H10 & J10 (LS245) and ICs H11 & J11 (LS244) found:

Checking with a scope found H11 pin 1 OBJSEL had a poor logic low level. This traced back to IC E3 (LS04) pin 10 and the scope revealed that all the logic low outputs from IC E3 were marginal. A piggyback check cleaned up the graphics and replacing IC E3 (LS04) fixed the game.

Hyper Sports Maintenance 2022




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