Service required for HP 9160A Optical Card Reader

[Paul Berger (Canada)]

(01-04-2016 11:35 PM)quantalume Wrote:  

(01-04-2016 10:21 PM)Jurgen Keller Wrote:  I found a resistor that looks damaged, see this picture (it's the small one in the middle with a crack). Probably that's not the root cause, just the consequence of another defect. Anyway, it's a starting point.

That's an inductor, 240 uH I believe.

...and it is discoloured as well which would suggest it was subjected to current beyond its design. The one right beside it has a small crack as well between the violet and brown bands. Where does the edge connector contact these two pins are connected to go? Is that a connection back to the 9100? According to the interface manual the 15V supply is only rated for 50mA which does not seem like a lot for a reader which I would suspect has a motor to feed the card through, does the reader derive all its power from the 9100 or does it have its own power supply?

Paul.