Equipment Required - Panasonic National RS-460S Service Manual

ALIGNMENT
EQUIPMENT REQUIRED
Signal generator that provides 10.7 MHz marker.
Sweep generator that provides 10.7 MHz and 400 kHz sweep wicth.
OSCILLOSCOPE
Set sweep selector of oscilloscope to EXTERNAL SWEEP.
Apply 60 Hz sweep signal from sweep generator to horizontal input terminals of oscilloscope.
Set band selector to FM.
Set volume contro! to minimum.
Set tone control to treble.
Maintain line voltage at 90~250 voits.
Note:
Before alignment of step 1 below unsolder lead between
test point TP105 and {Al, resolder it after alignment.
(See fig. 12.)
SWEEP
GENERATOR
COUPLING
SIGNAL
GENERATOR
COUPLING
RADIO DIAL
SETTING
INDICATOR ADJUSTMENT
REMARKS
High Side thru.
O.001eF to TP101.
(See fig. 12).
Common to chassis.
High side thru.
0.0014eF to TP101.
(See fig. 12).
Common to chassis.
Point of non-
interference.
(on/about
90 MHz)
Connect vert. amp.
of scope to TP105.
(See fig. 12).
Common to chassis.
T106 (4th IF)
T104 (FM 3rd IF)
T102 (FM 2rd IF)
T101 (FM Ist IF)
(See fig. 12).
Adjust for maximum
amplitude and proper
linearity.
(See fig. 8).
Same as step l. Same as step 1.
f: center frequency
Fig. 8
FM RF ALIGNMENT
Point of non-
interference.
(on/about
90 MHz)
Connect vert. amp.
of scope to TP103.
(See fig. 12).
Common to chassis
f: center frequency
Fig. 9
(SG imp 750)!
T107
(See fig. 12).
-#——W—+-0
0.01uF 5600 |
750, \
'
To obtain proper
linearity.
(See fig. 9).
To receiver
FM dummy antenna
Fig. 10
Set band selector to FM.
Set volume control to maximum.
Set tone control to treble.
SIGNAL
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREQUENCY
RADIO DIAL
SETTING
INDICATOR
Maintain line voltage at 90~250 volts.
ADJUSTMENT
REMARKS
Connect to EXT FM
antenna termina!
through FM dummy
antenna. (See fig. 10)
Common to chassis.
(400 Hz
Output meter
across EXT SP
Jack.
L103 (FM OSC coil)
L101 (FM collector
coll)
(See fig. 12).
Adjust for maximum
output.
Same as step 3.
Note: Whenever three output response peaks are noted, ad]
106M
(400 Hz
106 MHz
Output meter
across EXT SP
jack.
C159 (FM OSC
trimmer)
C158 (FM collector
trimmer)
(See fig. 12).
ust for center response.
Adjust for maximum
output.
Repeat steps (3) and
(A).