Werbung
| | FX-33BK/FX-33LBK
3. FM/MW/LW Tuner Alignment Procedures
L201
L221
vri71
(MM)
OH
Te191
TC201
T132_7131
3-(1)
Front-end Section
FM oscillator coil : L103
;
1. Set the frequency display to "108.0 MHz" and the FM
MODE switch to "MONO" position.
2. Confirm
that the noise occurs in the condition of no
signal input.
3. Adjust L103 so that the voltage of test point '"TP101"
becomes 9.0 V+0.1 V.
4. Set the frequency display to "87.5 MHz" and confirm
that the output of test point ""TP101" is 1.6V+0.5V.
FM antenna coil : L101, L102
5. Adjust
L101
and L102 to obtain the maximum
sensi-
tivity at 89.9 MHz.
FM atenna trimmer : TC101, TC102
6. Adjust TC101
and TC102 to obtain the maximum sensi-
tivity at 105.9 MHz.
7. Repeat the above adjustment of L101, L102, TC101 and
TC102.
Note: After adjustment, confirm that the Band Cover is in
the following range (for West Germany only).
Loweredge:
87.5 MHz (+0 Hz, —300 kHz)
Higher edge:
108.0 MHz (+500 kHz, —0O Hz)
3-(2) IF Detection
FM detector coil : T131, T132
1. Connect
a center-meter
or a digital voltmeter
to test
point '"TP102", and receive to 100.1 MHz signal in the
condition of SSG ATT 70 dB.
2. Adjust T131
so that the center-meter
indicates '0' or
the digital voltmeter reads 0 mV.
3. At the same time, adjust T132 so that the distortion is
minimized,
Stereo separation (for Europe, U.K. and Australia)
Tune
in to 98.1 MHz.
Adjust VR171
so that the
channel separation becomes maximum.
TP101
(VVC)
3-(3) MW Section
Note:
(
);9kHzstep,
[
] ;10kHz step
MW oscillator coil : L202
1. Set the frequency display to (522 kHz) [530 kHz] and
confirm that the output at test point '"TP101"' is (1.1 V
+0.3V)[1.1V+t03 V].
2. Set the frequency display to (1629 kHz) [1630 kHz or
1710 kHz]
and confirm
that the output at test point
"TP101" is (75
Vt08 V) (75 V+08
Vor82V
+t
08 V].
3. If its output is over 9 V at [1710 kHz], adjust L202 to
obtain [9.0 V].
MW antenna coil : L201
4. Connect a loop antenna to "AM LOOP" terminal on the
rear panel.
5. Adjust L201
to obtain the best receiving sensitivity on
(603 kHz) [600 kHz] .
MW antenna trimmer : TC201
6. Adjust TC201
to obtain the best receiving sensitivity on
(1404 kHz) [1400 kHz].
3-(4)
LW Section
LW oscillator coil : L222
1. Set the frequency display to 144 kHz.
2. Adjust L222 to obtain 1.0 V at test point '"TP101".
3. Set the frequench display to 353 kHz and confirm that
output at the test point ''TP101" is 7.2
V+ 1.2 V.
LW antenna coil : L221
4. Connect a loop antenna to "AM LOOP" terminal on the
rear panel.
5. Adjust L221
to obtain the best receiving sensitivity on
164 kHz.
LW antenna trimmer : TC221
6. Adjust TC221 to obtain the best receiving sensitivity on
353 kHz.
(No.2877) 1-5
Werbung
