Dear Colleague:
I am having a problem with this Philips Brilliance 40 and it is the following:
I have been replacing ADM modules for the last 2 years and these modules always present ring artifacts in the image.
I do not think this is normal. there must be a reason these modules get damaged, I do not know if there is a power supply issue or the fans inside the DMC stop working at a certain time and the circuits overheat, or may be I have a problem with the brushes that have never been serviced on this unit.
I will appreciate anyone that can give me some light on this matter.
I dare to suggest that white rings appear in the morning immediately after switching on. And after warming up the DMS and calibrating through the air, the artifacts disappear?
I came across a similar one. In my case, over time, microchips, sources of secondary negative voltage, degraded on the ADM module boards. They refused to work at room temperature and an input voltage of less than -3.4 volts. I replacing this microchips and the ADM modules have been working successfully for several years.
In your case, I would check the supply voltage of -3.4V on the left and right Motherboard DMS. These voltages are generated by Power Supply Modules PS1 and PS2 on the back of the rotating part of the gantry. Maybe it makes more sense to check these power supplies and adjust the output voltage?
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Manuel Brugat
Problem with Philips Brilliance 40
October 29, 2019 10:49
Dear Colleague:
I am having a problem with this Philips Brilliance 40 and it is the following:
I have been replacing ADM modules for the last 2 years and these modules always present ring artifacts in the image.
I do not think this is normal. there must be a reason these modules get damaged, I do not know if there is a power supply issue or the fans inside the DMC stop working at a certain time and the circuits overheat, or may be I have a problem with the brushes that have never been serviced on this unit.
I will appreciate anyone that can give me some light on this matter.
Sincerely:
Manuel (Manny) Brugat/Image Instrumentation, Inc.
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Konstantin Kuznetsov
re: Problem with Philips Brilliance 40
October 30, 2019 10:44
I dare to suggest that white rings appear in the morning immediately after switching on. And after warming up the DMS and calibrating through the air, the artifacts disappear?
I came across a similar one. In my case, over time, microchips, sources of secondary negative voltage, degraded on the ADM module boards. They refused to work at room temperature and an input voltage of less than -3.4 volts. I replacing this microchips and the ADM modules have been working successfully for several years.
In your case, I would check the supply voltage of -3.4V on the left and right Motherboard DMS. These voltages are generated by Power Supply Modules PS1 and PS2 on the back of the rotating part of the gantry. Maybe it makes more sense to check these power supplies and adjust the output voltage?
Good luck
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