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ALIGNMENT INSTRUCTIONS (RADIO)—1
Control Points:
1. Volume Control
Maximum
(AM-IF and RF, FM-RF); Minimum
(FM-IF)
. Treble Control
. Bass Control
. Balance Control
. Function Selector
AM, FM MONO,
FM AUTO
. Power Switch
ON
. Output of signal generator should be no higher than necessary to obtain output reading.
. Make certain that speaker system is connected to the receiver when aligning.
(or use 82 dummy
load resistors).
SIGNAL GENERATOR OR
SWEEP GENERATOR
RADIO DIAL
INDICATOR
STEP
SETTING
(VTVM or SCOPE)
ADJUST
REMARKS
CONNECTION
FREQUENCY
ANM-IF AND RF ALIGNMENT
1
Beane
Point of non-
T201 (AM CFT)
Adjust for maximum
wir '400 Hz | interference
T202 (AM IFT)
output.
Fashion loop of several
- Adjust for maximum
:
f
550 kHz
Output meter across
:
output by sliding coil
2 _ | turns of wire and radiate
30% Mod.
spenkeriack (L)
L201 (ANT ee
(L201)
along
ferrite
signal into loop of
with 400 Hz
(Imp. 82)
L202 (OSC
Coil)
core.
nee e
» Refer to Note.
CT201
Adjust for maximum
:
oes
1500 kHz
(ANT Trimmer)
output.
with 400 Hz | (134.1 mm)
CT202
Repeat steps (2)
(OSC Trimmer)
and (3).
Note:
Cement antenna coil with wax after completing alignment.
FM-IF AND DETECTOR ALIGNMENT
Adjust T101 for
maximum
amplitude
and symmetrical
T101 (FM 1st IFT)
curve.
T203 (FM Disc. IFT)
- Refer io Note.
Connect vert. amp
input of scope
between point TP201
and TP202 (Ground)
High side through
0.01 uF between point
TP101
and E (ground).
10.7 MHz
(400 kHz
SWP.)
Point of non-
interference (on/
about 98 MHz)
Adjust for maximum
amplitude and proper
linearity between about
+100 kHz markers.
T204 (FM Disc. IFT)
Note:
Before aligning step 1, turn the cores of T204 fully counterclockwise.
FM-RF ALIGNMENT
Connect to EXT.
FM
antenna terminal through
90 MHz
=
{
Dummy antenna.
30% Mod.
L101
(FM ANT Coil) | Adjust for maximum
Common to chassis.
with 400 Hz
L102 (FM DET Coil) | output.
Output meter across
:
speaker jack (L)
(Imp. 8)
CT101
(FM ANT Trimmer)
CT102
(FM OSC Trimmer)
Adjust for maximum
output.
Repeat steps (1)
and (2).
106 MHz
30% Mod.
with 400 Hz
106 MHz
(124.1 mm)
Note:
As three output readings will be present, adjustments must be made at center frequency.
SE-2519/C
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