HP-65 1333A04841 restoration it doesn't work anymore ...

[albertofenini]

Hi Tony, Hi everyone

we did some more tests ...

we tried to write a card, just after turning on the unit
the updated photo album shows a sequence of WA and WB for the 1333A04841 assembly

also writing a card after keying a small program failed, the recorded cards shows content that
has nothing to do with the original program

after reading a card, like any from the standard pac, all the memory steps are equal to 35 01

we have located the cap connected to pin 36 of the hybrid, is a 3.3 microFarad,
we have replaced it and specs can be seen for the old and the replacement one

sometimes the unit seems improved, sometimes still needs two tries to turn on

however, it still doesn't read

even if the card reader has proven to be working with another CPU, we have tried
all the possible adjustments with the eccentric but still nothing happens

also, we have monitored the Init Status at the testing point for both units,
they are quite different and both can be seen in the updated photo album

updated photo album is here : updated album for HP-65 1333A04841

what's funny is that after the first cleaning, it has red and written tens of cards ....

thank again for all the support and take care !