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Author Topic: Nintendo VS repair log  (Read 2566 times)
Nug
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« on: May 13, 2012, 09:47:55 PM »
Nintendo VS (mds04 super Mario bros) screen was Garbled, no response to controls. Board previously worked on with the tc5533-b being socketed along with 6116 SRAM. checked SRAM test pass, checked socket to pcb of 5533 and found two trace missing jumpered.. Game now booted but missing sprites, back ground and colours good, small distortion when scrolling. Got the probe out and 74ls04 at loc 5e had failed gate connected to pin31 of 2a03 CPU. Graphics now all good but no dipswitch Coin up resonse. Ls 240 at location 8n and 8m flaky. Replaced. All good
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