+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: General Forum (/forum-4.html)
+--- Thread: 82240 Rebranded (/thread-11689.html)
82240 Rebranded - TomC - 10-28-2018 09:35 PM
Hi:
It's been discussed before that 'back in the day', some companies had rebranded/relabelled 82240s and used them for other purposes.
I have recently acquired a '82240B', SN 3653Ixxxxx (x's my typing), which has the HP logo replaced with 'OSI Security Devices'.
Two major differences (from a standard 82240):
1. The socket for the AC power supply is covered.
2. It does NOT respond to external HP calculator IR signals. I tested this with both a DM42 and a HP48G; and a 'normal' 82240B.
I'm surprised as this would imply that there is a different ROM code in the internal 8050 processor. ---or perhaps it's just broken??? I have not yet taken a scope to it.
I have taken a pic of the 8050 and will compare with another 82240B.
It would be interesting to know what type of IR signal this does respond to.
The test fcn (Hold feed button during power up - and works normal. Rtns ROM code 'G'-which is the same code my ID1501xxxxx 82240B returns.)
TomC
RE: 82240 Rebranded - Ken S - 10-28-2018 10:14 PM
Take a look at this manual OSI Printer
Not sure if this is your device but probably used for something similar.
RE: 82240 Rebranded - grsbanks - 10-29-2018 08:15 AM
The IR receiver on this modded 82240 is not where you would expect it to be. I had one like that, I unmodded it and it works fine.
The IR receiver is actually sunk in silicone goo and is poking out of where the AC input socket was. Take it out of there (carefully!), clean the silicone goo off it and re-solder it in place on the PCB. Your printer will be good as new except that it no longer has an external power input. I'm not bothered, I run mine off NiMH rechargeables anyway.
RE: 82240 Rebranded - TomC - 10-31-2018 08:38 PM
grs:
Thanks! That's it!
TomC