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\R—2000
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5. ALIGNMENT
INSTRUCTIONS
TEST
EQUIPMENTS
AM Signal Generator with frequency range of at least from 145 kHz to 23 MHz AM.
FM Signal Generator with 10.7 MHz marker signal.
FM Sweep Generator with a wide band amplifier of approximately 500 kHz, with 10.7 MHz marker signal.
Oscilloscope with a wide band amplifier of approximately 100 kHz.
Test loop.— a coil of any size wire with one turn or more. (AM)
VTVM.
75 ohm dummy antenna. (FM)
Se
Se
Sa
NOTE:
When proceeding adjustment with the Radio P.C. Board separating from the Clock P.C. Board,
@ should
be connected to (). (See figure 4.)
ont
t--3
ar 4
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(AM ANT.)
in
C104
(AM OSC.)
LOOS
(FM RF)
(FM OSC,
(FM IF)
Figure 8.
AM ALIGNMENT
emu e
Turn on the AM signal generator and the VTVM, and allow a fifteen-minute warm-up period.
Using the test loop across the output of the signal generator, inductively connect the signal generator to the
radio.
Connect the VTVM across the voice coil or an
8 ohm dummy load.
Set the band select switch to AM position.
Set the signal generator frequency as listed in AM ALIGNMENT
CHART
and maintain a sufficient output
level to provide an indication on VTVM.
Set the volume control to mid-position.
Proceed as outlined in the AM-IF
ALIGNMENT
CHART.
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