Hi all

had an unfortunate lightning strike nearby my house, and it would seem that I can no longer recognise my Kodak OGX5.48 as a USB device anymore. My best guess is the grounding of the comms board is not great, and so something was fried…?

I can easily get a replacement, but are there any simple multimeter checks I can do to verify it is indeed the comms board that needs replacing (before I spend the cash and effort)?

Cheers and thanks!

17 hours ago, lombardy said:

are there any simple multimeter checks I can do to verify it is indeed the comms board that needs replacing

You could visually inspect TX1; it tends to burn up if there are problems.

There is a partial schematic trace here. Photos of various iterations of the comms boards (to compare with yours) are here.

You could check the three zero ohm resistors (which seem to be used as crude fuses) near TX1.

Also power up the board and check for about +12 V and -12 V at C1 and C4 respectively.

With a fair bit more effort, you could disconnect input and output except for power on CN2 (marked HFPW+), apply +5 V between pins 3 and 4 of CN3, and see if 3.3 V signals from CN3 translate to RS-232 signals (roughly ±12 V) at CN4, and vice versa. That's essentially a functional test of the comms board.