Found these inside a non-working 71B
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03-13-2018, 01:46 AM
(This post was last modified: 03-13-2018 01:51 AM by Dave Frederickson.)
Post: #55
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RE: Found these inside a non-working 71B
(03-13-2018 12:42 AM)Paul Berger (Canada) Wrote:(03-12-2018 11:50 PM)Dave Frederickson Wrote: I'm a bit confused by the daisy-chain diagram above. The "main 5 chips" are all daisy-chained, out to in, but according to the schematic, U5, the ROM, has it's DOUT unconnected and VDD is connected to DIN on both U5 and U6, the Port(0.1) RAM. Can you clairfy? Precisely, Paul. DIN on U5 and U6 should be connected to VDD and DOUT on U5 should be unconnected. That's not what's illustrated no matter what reference designators you use. By "clarify" I meant to confirm that the illustration is either wrong or the modules are wired contrary to the schematic. Dave |
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