Service Notes; Service Note 5501-02A July 2001 - HP 5501B Operating And Service Manual

9 SERVICE NOTES

9-1.

Service Note 5501-02A July 2001

SUPERSEDES: 5501 B-02
5501B Laser Heads
Serial Numbers:
To Be Performed By: Agilent-Qualified Personnel Situation:
In many incidences, the temperature adjustment process for the laser heads had been found being
adjusted incorrectly. The result of in-correct adjustment might shorten the life of the laser tube and some
other un-predictable laser head performance. This service note is important addition to the manual
instructions when replacing the laser tube or the control board.
Solution / Action:
1. After the Laser Tube or the control board has been replaced, the heater voltage must be correctly
readjusted! The adjustment is done with the pot (R16) to the right of U11 on the control board.
2. The adjustment must be performed when the laser tube is at room temperature, 21 to 25 degrees C
(approx. 70 to 77 degrees F). If the laser High Voltage Power Supply or heater has been on, allow at
least two hours with ±15 Vs off before performing this adjustment.
© Agilent Technologies
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ADMINISTRATIVE INFORMATION
HP5501B
Service
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