Leader Electronics Corp. LDC-824 - Maintenance

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6.
MAINTENANCE
(1)
To calibrate or adjust the reference oscillator.
Set GATE TIME selector to 10s and FREQ. RANGE selector to 80 MHz.
A standard 10MHz signal generator with an accuracy greater than +1 X 107° is required for
calibration.
Apply
the
output
of
standard
signal
generator
to
the
input
terminal
of
LDC-824
(S) to measure the frequency. A normally operating counter displays 10MHz. If you read
other
than
1OMHz,
adjust
the
trimmer
capacitor
with
the
screw
driver
through
the
hole
for
adjustment
provided
at
the
rear
panel
of
the
LDC-824(S),
in
order
to
make
exact
accurate
display.
(2) The LDC-824(S) has been designed for easy maintenance and high reliability by employing
(3)
LSI/MSI IC’s for the digital and power-source sections of this instrument.
If the instrument fails to perform in the manner specified herein, write or call your nearest
Leader office for factory-trained service. For safety reasons, and to prevent damage to the
instrument, DO NOT REMOVE the unit from the case.