Q: Can anyone help me? I am facing a problem with Precision 500D table angulation. It doesn’t tilt and I can see the K2 relay energized but not K1, could that be the cause of problem?
A: Inspect the main cable harness that goes from the tub to the table base. Cut wires in the cable harness can cause this problem.
A: I recommend you check the slide out step stool safety switch. I checked my unit and get exactly the same symptoms with the step pulled out even just a little. These switches will break after years of use and slamming the step back in hard. You may have to lie on the floor to get access to the bottom of the step cover. You may also look in the prints and find a bypass point to test but do not permanently bypass this or you could seriously damage your table. This switch is there for protection.
A: The step interlock switch is S7 connected to TS1 pin 19 and 20 on the base, it goes out of J7 pins 47 and 48 to J104 in the positioner rack
A: [Follow up] Thanks sir. I checked that switch and it is good. After that I checked the limit switches again. I pressed one first and then the other one, both of them start and tilt. I think one of them was the problem. Thanks for you help.
Q: We have just installed a Siemens Artiste in our department. The error “Modulator Incomplete” is frequently occurring during the day. Its occurrence is random and does not have a trend. It can occur any time during warm up, exposure or waiting periods between two exposures. We were told that the error might be related to the oil pump and it will wane by time. Could it be true that this error occurs because the LINAC is new and it will become less frequent with time? Any suggestions?
A: The modulator incomplete error is a generic error that covers approximately 20 different faults from the facility water flow to the oil temp and charge system. When this fault happens, do not reset, but instead enter the treatment room, go the left side of the machine and look at the K2 chassis. It has multiple rows of lights that start with facility water at the top left and continues left to right down three or four rows. Normal operation, all lights are green, orange is caution, and red is the fault. The way Siemens designed this assembly, the light that is red is the fault that caused “modulator incomplete.” Each light after the first red light will be red, but the first red light is the cause. With one exception (again, the way they designed it), the oil temp light will always be red when any other light is red. The oil temp light is the last light in the chain, if it is the ONLY light that is red, then oil temp is the problem.
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