J
Jurg Murger
- Jan 1, 1970
- 0
Problem: the bulb turns off after 5-10mins.
There is a very high frequency sound in the switching powersupply (I
couldn't localize, where exactly in the powersupply) and on one of the
pcb's a small relay (ignition?) is energized and released several times
(release time after ~5secs).
After pushing the 'power' button twice the bulb ignites again and runs
another 5-10mins (first push: the powersupply goes off (contactor
releases), second push: the contactor is energized again, then ignition).
There are other powersupplys on that site, so they were switched. The
problem does not wander with the powersupply, it stays with the
projector. Unfortunatly there are no manuals of any kind on site, so I
refrained from turning the trimpots on the pcb's (although it was tempting
(-: ).
Any suggestions and hints (and of course documentations) would be greatly
appreciated.
-Jurg
There is a very high frequency sound in the switching powersupply (I
couldn't localize, where exactly in the powersupply) and on one of the
pcb's a small relay (ignition?) is energized and released several times
(release time after ~5secs).
After pushing the 'power' button twice the bulb ignites again and runs
another 5-10mins (first push: the powersupply goes off (contactor
releases), second push: the contactor is energized again, then ignition).
There are other powersupplys on that site, so they were switched. The
problem does not wander with the powersupply, it stays with the
projector. Unfortunatly there are no manuals of any kind on site, so I
refrained from turning the trimpots on the pcb's (although it was tempting
(-: ).
Any suggestions and hints (and of course documentations) would be greatly
appreciated.
-Jurg