Chapter
6
MAINTENANCE
6.1
Introduction
This chapter describes how to maintain the LDC-3700 Series Laser Diode Controller. Included are sections
covering calibration, fuse replacement, line voltage selection, and disassembly.
WARNING
THE SERVICE PROCEDURES DESCRIBED
IN
THIS CHAPTER ARE
FOR USE BY QUALIFIED PERSONNEL. POTENTIALLY LETHAL
VOLTAGES EXIST WITHIN THE LDC-3700 SERIES LASER DIODE
CONTROLLER. TO AVOID ELECTRIC SHOCK, DO NOT
PERFORM ANY
OF
THE PROCEDURES DESCRIBED IN THIS
CHAPTER UNLESS YOU
ARE
QUALIFIED TO DO SO.
QUALIFIED SERVICE PERSONNEL ARE REQUIRED TO WEAR
PROTECTIVE EYEGLASSES AND ANTI-STATIC WRIST BANDS
WHILE
WORKING ON THE LDC-3700 SERIES LASER DIODE
CONTROLLER CIRCUIT BOARDS.
CAUTION! HIGH VOLTAGES ARE PRESENT ON AND AROUND
THE PRINTED CIRCUIT BOARDS OF THE LDC-3700 SERIES
LASER DIODE CONTROLLER.
6.2
Calibration Ovenicw
The LDC-3700 Series Laser Diode Controller should
be
calibrated every
12
months or whenever performance
verificat~on indicates that calibration is necessary.
All
calibrations can
be
done with the case closed. The instrument is calibrated by changing the internally stored
digital calibration constants.
6.2.1
Recommended Equipment
Recommended test equipment for calibrating the LDC-3700 Series Laser Diode Controller is listed in Table
6.1.
Equipment other than that shown in the table may
be
used
if
the specifications meet or exceed those listed. If your
LDC-3700 Series Laser Diode Controller is equipped
with
the model 1231 GPIBIIEEE-488.2 interface you
may
refer to sections 6.3.2, 6.3.4, 6.4.2. 6.4.4, and 6.4.5 for calibration procedures using the
GPIB,
if
desired.
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