Subject:
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Readings
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 17 Jan 1999 19:21:03 GMT
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Original-From:
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ipsofac@aol.STOPSPAMcom
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Viewed:
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794 times
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Fred-
You left it unclear in an explanation to another letter. You were
answering the fellow from India as to what readings one should see when useing
a logic probe on the memory chip. You said that if one was stuck at 1 or
zero-it might be indicative of a bad chip.
Should be floating then-around 2.2 volts with power applied? Both red and
green lights on when useing a logic probe?
Also-I am still having downloading problems-I have had a HB that has always
worked. Now it will not take a DL. I have replaced all the cables. I have
ordered a new Maxamchip, & the three memory chips. Had I not spent the
amount of money I did on the HB to begin with- I would have long ago given up.
Cappy Anderson, Yorki, ME
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Message has 1 Reply:
 | | Re: Readings
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| yes, memory wires should be oscillating, back and forth betw 0 and 5 volts. this is not floating; floating implies not connected. re: your other DL probs, usually, it is a bad connection on the PCB. try continuity checks on the memory subsystem. (...) (26 years ago, 17-Jan-99, to lugnet.robotics.handyboard)
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