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S-Band DFTS D50 Maintenance Procedure
V 1.1
Introduction
CPI's S-band Klystrons may require channel changer plunger cleaning and lubrication
periodically. This is generally only the case when in normal operation there is extensive
tuner usage and/or the klystron is exposed to an extremely harsh environment.
This document describes the S-band Klystron channel changer cleaning procedure which
was developed for implementation at CMP Georgetown or at approved CPI service
centers. Customer implementation is at the customers own discretion.
Should the
customer decide to perform this operation, CPI cannot be responsible for any damage to
the klystron by the incorrect application of this procedure or by improper handling of the
klystron.
The procedure will take a few hours. It should be implemented by qualified technicians
with knowledge about CPI klystron products. The successful maintenance of the tuner
may be difficult to perform while it is inside the KPA. The option of taking the klystron
out of the KPA prior to implementing this procedure should be seriously considered.
If the klystron/KPA is in the power-on state, it needs to be powered down in a controlled
manner as described in the operation manual allowing sufficient time for the collector to
cool.
CPI Confidential V 11
June 12, 2009
1
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Summary of Contents for CPI S-Band DFTS D50
- Page 1 Customer implementation is at the customers own discretion. Should the customer decide to perform this operation, CPI cannot be responsible for any damage to the klystron by the incorrect application of this procedure or by improper handling of the klystron.
- Page 2 (caution: care must be taken as you remove the channel change controller because a D50 connector exists between it and the motor module) from the motor module. CPI Confidential V 11 June 12, 2009...
- Page 3 (two screws also on left side) Tuner cover Remove the tuner cover shown in above picture, unfastening 4 screws using a stubby Phillips screwdriver, taking care in the strong magnetic field. Preferably use non- magnetic tools. CPI Confidential V 11 June 12, 2009...
- Page 4 Use PC interface cable supplied with each klystron (CPI P/N 764058). Plug the DB15 (f) connector marked “CONTROLLER” into the DB15 (m) port on the channel changer controller assembly.
- Page 5 CPI’s website at www.cpii.com/product.cfm/7/37. Plugged cable should resemble configuration in the picture above. Turn on the KPA power ignoring the channel change link fault. Tuner should move to the HOME position and then it will assume the last active channel settings.
- Page 6 “FELIX” software to select the highest frequency channel as shown in picture below. This will allow access to the driving screw threads to be inspected. Tuner @ the highest Home position channel. Exposed marker driving screw thread Optical sensor CPI Confidential V 11 June 12, 2009...
- Page 7 “HOME” to channel 1 to channel 50 to “HOME” for at least ten cycles. This can be done using the “TUNER CYCLING” function in the “TUNING” menu of the “FELIX” software. CPI Confidential V 11 June 12, 2009...
- Page 8 Channel change faults will not be shown on the KPA until this time exceeds 30 seconds. The “HOME” process will take longer than 30 seconds but only happens when KPA is powered on. CPI Confidential V 11 June 12, 2009...