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_RF-544 |
MB MEASUREMENTS AND ADJUSTMENTS
@ ALIGNMENT INSTRUCTIONS
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1. Set volume control to maximum.
3. Set power source voltage to 6V DC.
2. Set band switch to AM or FM.
4. Output of signal generator should be no higher than necessary
to obtain an output reading.
i AN-IF ALIGNMENT
SIGNAL GENERATOR or
INDICATOR
SWEEP GENERATOR
RADIO DIAL
(ELECTRONIC
ADJUSTMENT
Headphones Jack
Fashion a loop of several
459kHz
Point of non-
(16 ~ 32Q)
turns of wire and radiate
30% Mod.
interference.(on/ | /Fabicate the plug as showny
| T2(AM IFT)
Adjust for maximum
signal into loop of receiver.
at 400Hz
about 600kHz)
(se cael haa °)
output.
the measuring instrument.
Mi AM-RF ALIGNMENT
Fashion a joop of several
output.
signal into loop of receiver. | 514+3kHz(EG) | fully closed.
CT1-3 (AM OSC | Adjust for maximum
Trimmer
output.
Adjust for maximum
(*1] L8 (AM ANT]
output. Adjust L3 by
moving coil bobbin
along ferrite core.
"
CT1-4 (AM ANT ; Adjust for maximum
Trimmer) | output.
1639+5kHz(EG) | fully open.
[*1] Fix antenna coil with wax after completing alignment.
Mi FM-IF ALIGNMENT
INDICATOR
SWEEP GENERATOR
RADIO DIAL
(ELECTRONIC
ADJUSTMENT
SETTING
VOLTMETER or
(Shown in Fig. 3)
CONNECTIONS
FREQUENCY
OSCILLOSCOPE)
ere side to test point
(Sweep)
about 90MHz)
REMARKS
Waveform is shown
Negative side to test
in Fig. 2
point BiGEH.
Mi FM-RF ALIGNMENT
Headphones Jack
|
_ | (16 ~ 320)
ae
86.2MHz(E/EB)
Variable capacitor | sFabicate the plug as shown,
|L5 (FM OSC Coil)
[*2] Adjust for
Connect to test point
87.35+0.05MHz(EG) | fully closed.
e Fig.1 and then connect
maximum output.
ry tive side to test point
oMHZ(EEB)
| Variable capacitor
108.2540,05MH2(EG)' fully open.
106 MHz
Tune to signal.
{*2] Three output response will be present; proper tuning is the center frequency.
¢ ALIGNMENT POINT
¢ Please refer to Circuit Board and Wiring Connection Diagram for test point locations.
=
to
=>
Measuring
a 7
=
Instrument
Ay
= R= 16-320
Fig.1
Fig2
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