Panasonic NATIONAL STEREO SS-7000A Servicehandleiding - Pagina 5
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ALIGNMENT
INSTRUCTIONS
Distance from ''Start Point'
reference point.
1. AM/FM-IF
& RF ALIGNMENT
AM-IF & RF ALIGNMENT
(Refer to figs. 8, 9)
Set band selector switch to AM.
Maintain line voltage at rated voltage.
Set volume control to maximum.
Set balance control to center.
Set bass control to center.
SIGNAL
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREQUENCY
RADIO
DIAL
SETTING
INDICATOR
Fashion loop of several turns
455 kHz
'
g
serial
of wire and radiate signal into
(400Hz Mod.)
loop of receiver.
550kHz
(400 Hz Mod.)
1500 kHz
(400 Hz Mod.)
Point of noninter-
ference.
(on/about 600 kHz)
550 kHz
1500 kHz
Output meter across
EXT Speaker Jack
(L} (Imp. 16)
FM-IF AND DETECTOR ALIGNMENT WITH OSCILLOSCOPE
(
EQUIPMENT
REQUIRED
Signal generator that provides 10.7 MHz marker.
Oscilloscope
1500 kHz
FM
Refer to figs. 8, 9)
ADJUST
T206 (1st IFT)
T207 (2nd IFT)
T2028 (3rd IFT)
L204 (OSC Coil)
L801 (ANT Coil)
CT201 (OSC
Trimmer)
CTs801 (ANT
Trimmer)
45K!
2 BK
REMARKS
Adjust for maximum
output
Adjust for maximum
output by sliding coil(L8o1)
along ferrite core.
Adjust for maximum
output. Repeat steps (2)
and (3).
10.7 MHz
to horizontal
input terminals of oscilloscope.
Set band selector switch to FM.
Set volume control to minimum,
Set bass control to center.
SWEEP
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREQUENCY
RADIO DIAL
SETTING
Set balance controi to center
Maintain line voltage at rated voltage.
INDICATOR
High side thru.
dummy antenna
to point TP1.
Common
to
chassis.
High side thru.
0.001 uF to point
TP2.
Common
to
chassis.
Point of non-
interference
(on/about 89 MHz)
Connect vert. amp.
of scope to point
TP2.
Common
to
chassis.
ADJUST
Tio1 (FM Ist IFT)
Ti02 (FM 2nd IFT)
T201 (FM 3rd IFT)
T202 (FM 4th
IFT)
T204 (FM 6th IFT)
T205 (FM DISC. IFT)
Fig. 11
REMARKS
Turn T203 and Tz205 upwards and
adjust T1o1, T102, T201, T202
and 7204 for maximum
amplitude and symmetrical
curve.
Adjust T7205 (primary) so that
10.7 MHz
marker
is at the
T203 (FM 5th IFT}
T204 (FM 6th IFT)
T205 (FM DISC. IFT)
center.