Sperry Marine 4914-CA, Руководство по эксплуатации, установке и обслуживанию

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gain factor settings in the Technical Pages (code 140) need to
become checked and adjusted:
– Follow the instructions in ”CORRECTION VALUES” on page 8-26
of the ‘Factory Settings Menu (Technical Pages)´ to match both
gyrosphere current values.
8. In case the reconfirmed value for the gyrosphere current, directly
measured (true RMS) at the 1
Ω
gyro current test resistor (R103) on
the master PCB, is as well above 320 mA, the VAC true RMS value
needs to become adjusted:
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kçíÉ For a present operating voltage of 100 VAC on the master PCB, 105 VAC
true RMS are necessary.
– Measure the VAC true RMS
at pins 1 and 2 (wires white
and brown) of the J4 con-
nector on the NAVIGAT X
MK1 master PCB.
9. Adjust the potentiometer (R36)
on the NAVIGAT X MK1 master
PCB with a trimmer adjustment
tool to set 105 VAC true RMS.
⇒
Be careful not to damage the
potentiometer (R36).
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A regular screwdriver is not recommended for the adjustment of the
potentiometer (R36) as these are sensible components.