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HP 21 repair
06-15-2015, 03:16 PM
Post: #7
RE: HP 21 repair
(06-15-2015 02:56 AM)PANAMATIK Wrote:  
(06-15-2015 01:28 AM)surgdog Wrote:  Is there anything to be done or do I just write it off? Is this repairable?

If only some traces on the main board are damaged, they can be repaired with isolated copper wire (german Kupferlackdraht). The HP-21 main board is easily accessible for repairs. If the ACT chip is damaged, you can replace it by the "new ACT". Your HP-21 is most likely repairable. Don't write it off!

Bernhard

Forgive my ignorance but what is the "new ACT"?
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Messages In This Thread
HP 21 repair - surgdog - 06-15-2015, 01:28 AM
RE: HP 21 repair - Dave Frederickson - 06-15-2015, 01:46 AM
RE: HP 21 repair - surgdog - 06-15-2015, 01:55 AM
RE: HP 21 repair - Dave Frederickson - 06-15-2015, 02:14 AM
RE: HP 21 repair - PANAMATIK - 06-15-2015, 02:56 AM
RE: HP 21 repair - surgdog - 06-15-2015 03:16 PM
RE: HP 21 repair - Marcus von Cube - 06-15-2015, 05:30 PM
RE: HP 21 repair - isanchez - 06-15-2015, 11:10 AM



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