does anyone have any service info for this scanner - schematics - HP 5190 flatbed scanner service info - goes by model 5100cse
it has 3 voltages from power supply - all of which are ~10% low -
5v = 4.5v
12v - 10.8v
24v = 22.1v
when powered on scan light flashes once. when connected to computer - WinXP - nothing is recognized.
tried reloading s/w & drivers - but computer doesn't see connection no new hardware found message. no imaging device in hardware manager.
was working - just stopped.
seems like parallel port busy line is active. all other ports appear to have correct logic level at idle.
xtal oscillators appear to be running uses a Motorola 6811 processor.
I have disconnected and reconnected all connectors and one plug in IC
thanks for your help