Adjustment Of Power Supply Unit; Adjustment Of Output Valtage; Total Adjustment; Adjustment Of Meter - JRC JRL-2000F Service Manual

4.3 Adjustment of Power Supply Unit
4.3.1 Adjustment of Output Voltage
[ Required measuring instrument]
(1 }Tester
< Adjustment procedures
>
(1 )lnstall the power supply unit to the JRL-2000F and turn the power and PA on.
(2}Remove the rubber cap from the rear panel of the JRL'-2000F. Insert a minus screw
driver until it hits the volume switch (RV201 of CBG-68 main PS unit}. Turn the
volume switch to adjust it to DC
+
80 V while checking the voltage of the output
terminal of PA with a tester.
4.4 Total Adjustment
Totally adjustable partsexist in CDJ-1143 control and CCB-367 PA control circuits.
4.4.1 Adjustment of Meter
[ Required measuing instruments]
(1 )High frequency power meter (over 1 kW max.)
(2}Dummy Ioad (over 1 kW max.}
< Adjustment procedures >
(1 }Turn on the PA switch of the JRL-2000F. A yellow LED of PA lights up after approx.
0.6 second, and the pointer of the meter on the righthand side moves (VD range).
Adjust RV 4 of CDJ-1143 control circuit so that the meter indicates 80 V.
(2}0utput power from the exciter. Adjust so that the external power meter (not the
meter on the righthand side of the JRL-2000F.) points to 1000 Wand then adjust
RV3 so that the meter (range is Po) on the lefthand side of the JRL-2000F points to
1000W.
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