HP-67 - 1705S02263 - Full Repair Advice Requested (was HP-67 - strange behavior)

[albertofenini]

Hi everyone, as said we have split in two the original thread.

This is what was left on the bench after received the donor CPU board for the HP-67 1612A03018 :
- the broken logic board
- two card readers HP-65 syle that didn't work with the HP-67 1612A03018
- one keyboard pcb missing the transistor between anode and cathode driver
- a case with a very much deteriorated facelift

The broken logic board : We have found good Phi1 and Phi2 on the ACT, the CRC and the ROM0.
However, the side of the ROM0 that handles the segments of the display is dead.
We will measure if there is any LED activity as suggested from Tony in the old previous thread

The Keyboard PCB : we need to find a replacement for the M624 3-393 any idea on that ?
Also on this we will need to replace the RCA chip as two segments in each of the leds are not working

The Card reader : since it didn't work with the HP-67 1612A03018 we are expeting it will not
work with this either, but who knows ...

The facelift : we heard of a vinyl layout that can be put over original layout, but we can0t remember where, guess was in the Panamatik website

Most urgent is the replacement for the broken transistor, we will greatly appreciate any advise on that

Pictures here : HP-67 1705S02263