HP 88780 tape loading questions
jfoust at threedee.com
Fri Jan 20 15:41:13 CST 2006
I tried the Overland Data 5622 I bought; it seems to have big troubles.
On power-up, "Alert" blinks and it won't load - none of the buttons work.
I've temporarily given up on the M4 9914 and exploring the HP 88780.
It loads a tape almost always. It catches on the takeup reel, whips
into high-speed mode, then
Test 0 passes. I've run a few of the most interesting interactive test
sequences. NVRAM, timer, DAC, ADC, tach, motor loop, tension limit
and sensors, speed encoder, tape sensors, BOT/EOT sensors all OK.
Test 1 with a scratch tape fails within test 165 "load tape",
followed by "ERR 60".
Bitsaver's 7980 manual on page 5-119 (PDF pg. 186) says error 60 is
"tracks with gain too low and too high during autocal." Does this
mean I need to clear the NVRAM and run the "test 99" calibration?
I haven't changed or recorded the NVRAM values yet. Should I bother?
Anyone have experience with http://www.comco-inc.com/ ? They're only
a few hours away.
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