Don,
thanks for the advice. I could do this in the next days. I will post the results.
Antonio I8IOV
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--- In hp_agilent_equipment@..., Don Bitters Jr <donbitters@...> wrote:
The 3586, 8568, 8566, 8340 series units All used the RPG encoders with a lamp HP 2140-0016 (653 lamp ??). These RPG's were round flattened cylinders. if the lamps were old/darkened by age/misaligned you could get " works in one direction but not the other". The solution is to remove the RPG, pop the end cover-2 opposite tabs, use needle nose to pull the bulb from the side, check bulb for clarity, resistance-90 ohms, reinsert/replace with base of bulb flush with case of RPG, AND parallel to the optical grating inside - parallel to the PC brd. The detector diodes need to be illuminated equally.
Don B.
