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using Tapes with the 9825B



#5

does anyone know anything about saving programs on the HP 9825 to tape ?? I have a (recently accquired) 9825B and even managed to get hold of a couple of old 3M DC100A tapes my first attempts last night to get the 9825 to save a program resulted in lots of error messages (error 30 and 42 - I think from memory) and the discovery that the tape had ended up being pulled off one of the spools.

I have since opened the cartridges up and discovered how to rewind the tape on to the spool etc.

Before anyone points out the obvious I have ordered the CDs but was hoping someone could give me a few pointers in the meantime.

Regards
Richard Freeman


#6

If when you hit the "rewind" button the tape comes off the spool, there are 6 possible causes:

1) The little 45 degree mirror in the cartridge is missing or out of alignment.

2) The tape isn't wound far enough onto the pickup reel, HP recommends 10 turns if it comes off.

3) The tape is missing the hole that tells the sensor that it's found the beginning/end of tape.

4) The photo sensor in the tape drive is covered with dirt.

5) The light bulb for the photo sensor is out (pop out the tape and look into the slot, you should be able to see a spot of whitish light and all the drive components should be visible. If not, the bulb is dead since it's always on whenever the calculator is powered up. I don't know the bulb type, it might be listed in the service manual but I only have one for the 9815 -- same tape drive -- and it's not listed there.)

6) There's a problem with the electronics for the BOT/EOT sensor.


Once you get the tape to rewind properly you can find the commands to use in the quick reference guide:

http://www.n4mw.com/qr9825.htm

I hope that helps!

-Katie

#7

Some diligence with Google turned up http://www.n4mw.com/qr9825.htm ---> http://www.n4mw.com/hp9825/qr/qr3233.jpg which shows that error 30 means "Special function key not defined" (maybe your memory was off here), and 42 means "Tape cartridge is write-protected...." (jackpot!).

Checking a few pages suggests the entire manual has been, uhhh, jpgized.

Good Luck, Richard.


#8

Thanks Glen and Katie
I suspect I was being to specific in my google searches as I was trying to figure out wether the 9825 needed a preformatted tape or not.

as for the tape being wound off the spool I suspect that was probably a result of rewinding the tape too often (operator error !) as the light in the drive is on and the tapes have their mirrors (they were brand new out of shrinkwrap) if it still plays up tonight I will have to have a poke around with a CRO and whatever info I can glean from Patent no 4,075,679 which according to sources on Classic comp is the patent for the 9825.

Thanks for the Link and the Info !

Regards
Richard Freeman


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