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Alignment
Risse PSPS RE SID SEGA II) Nd EIS Bat O57 SERIE A SAREE I OIE NR TOILED
BEATS OO
a
soldered in place) and the capacitor mount-
ing (screws).
Oj Turn the power switch off, and jump TP-
6501 to chassis ground.
O Turn the power switch on. The motor
should rotate, and then stop.
O Set the capacitor to its maximum capaci-
tance position (plates fully meshed) by
hand, and tighten all shaft coupler set
screws, using care not to disturb the capaci-
tor or motor positions.
© Turn the power off, and jumper TP6502 to
chassis ground (along with TP6501).
G Turn the power back on. The motor should
move 180°, and the capacitor should be then
at minimum capacitance (fully unmeshed).
O Remove the grounding jumpers from
TP6501 and TP6502.
Tuner Impedance & Phase Detection
O Connect the 50-Q dummy load and watt-
meter to J6501 (the output of the Tuner Con-
trol Unit), and connect J6502 (RF IN) to
J5002 (LPF OUT). Tune the transceiver to
14.000 MHz, CW mode:
© Connect the DC voltmeter between pins 1
("I") and 2 ("VW") of J6508 (either polarity).
VR3004
Meter Full-Scale
VR3001
O Press the TUNER and MOX buttons, adjust
the RF PWR control for 50 watts output, and
then adjust TC6501, if necessary, for meter
indication within + 0.08 V of OV.
O While still transmitting, move the DC volt-
meter to pins 3 ("C") and 4 ("L") of J6508
(either polarity), and adjust VR6501, if nec-
essary, for meter indication within + 0.02 V
of 0 V.
RF Unit Local Signals and Oscillators
© With the RF millivoltmeter, confirm at least
900 mVrms at TP2001, and 400 mVrms at
TP2002 (see page 3-11).
Notch Oscillator
Oj Connect the frequency counter to TP2004
(pin 7 of Q2020), and with the NOTCH con-
trol at 12 o'clock, adjust L2062 for 8.67 MHz
+ 50 Hz.
0 Replace the counter with the RF voltmeter,
and adjust T2032 for maximum voltage (at
least 300 mVrms).
PO Meter Calibration
VR3002
SWR Mater Calibration
VR3003
ALC Meter Sensitivity
JW3001
Jump for TX Carrier Point Alignment
Display Unit Test & Alignment Points
3-5
FT-890
Technical Supplement
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