Panasonic RX-5080 - Measurements and Adjustments

RX-5080
1
Cassette Compartment
Front Cabinet
Mechanism
Dial Chassis
MEASUREMENTS AND ADJUSTMENTS
@ ALIGNMENT INSTRUCTION
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1. Set volume control to maximum. . Set mode switch to stereo.
2. Set tome contro! to treble. 7. Set power source voltage to 12 volts DC.
3. Set band switch to AM or FM. 8. Output of signal generator should be no higher than
4. Set function selector to radio. necessary to obtain an output reading.
5. Set balance control to center.
SIGNAL GENERATOR or INDICATOR
De reoee ee eee FS OLINETES | ADJUSTMENT REMARKS
CONNECTIONS | FREQUENCY] [DISTANCE] or SCOPE)
AM ALIGNMENT
Output meter
across speaker
voice coil.
Fashion loop of
several turns of
wire and radiate
signal into loop of
receiver.
455 kHz
30% Mode.
with 400 Hz.
Adjust for maximum
output.
Point of non-
interference. (on/
about 600 kHz).
T2 (AM IFT)
550 kHz L4 (AM OSC Adjust for maximum
(2) 550 kHz {18.5mm Coil) output. Adjust L3 by
(#3/32”’)] (*1) L3 (AM moving coil bobbin
ANT Coil) along ferrite core.
1,500 kHz CT4 (AM OSC Adjust for maximum
1,500 kHz (168.5 mm Trimmer) output. Repeat
(65/s’’)] CT3 (AM ANT steps (2) and (3).
Trimmer)
(*1) Cement antenna bobbin with wax after completing alignment.
Connect to test point Connect vert.
(4) | “W through 0.001 uF. 10.7 MHz Point of non- amp. of scope to Adjust for maximum
Negative side to (SWP.) interference. (on/ test point 7. amplitude.
test point ~~. about 90 MHz) Negative side to (Refer to fig. 7.)
test point ~~.
Adjust for maximum
amplitude.
(Refer to fig. 8.)
T3 (FM 2nd IFT)
= pop ;
FM-RF ALIGNMENT
Connect to test point
‘™ through FM
(6) dummy antenna. ene
Negative side to
test point 7.
L2 (FMOSC |
90 MHz Output meter Coil) Adjust for maximum
[30 mm across speaker L1 (FM ANT output.
(19/16 '')} voice coil. Coil)
(7)
106
MH
|
106
MHz
OTe
Seely
Adjust
for
maximum
°
2
[158.3
mm
a
ae
output.
Repeat
steps
(6
7/32””)]
CT
(FM
(6)
and
(7).
Trimmer)