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1132_T131
TP102
fs}
(cm)
(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 voitage 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 1.6 V£0.5 V.
FM antenna coil : L101, L102
5. Adjust L101
and L102 to obtain the maximum
sensi-
tivity at 89.9 MHz.
FM antenna trimmer : TC101, TC102
6. Adjust TC 101 and TC 102 to obtain the maximum sensi-
tivity at 105.9 MHz.
7. Repeat the above adjustment of
L101,L102, TC 101 and
TC102.
Note: After adjustment, confirm that the Band Cover is in
the following range (for West Germany only).
Lower edge:
87.5 MHz
(+0Hz,
— 300 kHz)
Higher edge:
108.0 MHz (+500 kHz, —0O Hz)
(2) IF Detection
FM detector coil : 7131, T132_
1. Connect a center-meter or a digital voltmeter to test point
"TP 102', and receive to 100.1
MHz signal in the con-
dition.of SSG ATT 70 aB.
2. Adjust T131 so that the center-meter indicates ''0"' or
the digital voltmeter reads O mV.
3. At the same time, adjust T132 so that the distortion is
minimized.
Note: (
(3) MW Section
}; 9 kHz 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
+0.3 V) [1.1 V+0.3 VI].
2. Set the frequency display to (1629 kHz) [1630 kHz or
1710 kHz] and confirm that the output at test point
""TP101""
is
(7.5 Vt0.8V)
[7.5 V40.8V_
or
8.2 V+0.8 V].
3. If its output is over 9 V at [170 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 TC 201 to obtain the best receiving sensitivity on
{1404 kHz) [1400 kHz].
}; 10 kHz step
(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 frequency display to 353 kHz and confirm that
output at the test point ''TP101" is 7.2 V41.2 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.
TAY
NAY
DR-E22BK
DR-E22LBK
a
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