Adjustment Of Power Supply Unit; 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 parts exist 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 load (over 1 kW max.)
< ~djustment 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 RV4 of CDJ-1143 control circuit so that the meter indicates 80 V.
(2)Output 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 W and then adjust
RV3 so that the meter (range is Po) on the lefthand side of the JRL-2000F points to
1 OOOW.