Scanner Unit - JRC JMR-92 Series Field Service Manual

4.1.1 NKE-1130 Scanner Unit
4.1.1.1 Magnetron Replacement/NKE-1130
When replacing magnetrons, make sure to shut off the main power and let
the equipment stand for more than 5 minutes to discharge the high-voltage
circuit.
Failure may result in electric shock.
Make sure to take off your watch when your hand must get close to the
magnetron.
Failure may result in damage to the watch since the magnetron is a strong
magnet.
Cautions on handling the magnetrons that have been stored for a long
period of time
Since the magnetrons that have been stored for a long period of time may become unstable at the
start of the use due to the occurrence of spark, etc., apply aging by using the following procedure.
1
Extend the preheat period. (Standby: 20 to 30 minutes)
2
Start from the short pulse range and shift to the long pulse range sequentially.
If the operation becomes unstable during this period, return to Standby immediately, maintain the
status for 5 to 10 minutes and start operation again. Repeat this procedure.
Chapter 4 Replacement procedure 4-8