Teac T-X150 - Page 5

ITEM SETTING ADJUSTMENT POINT MEASURING POINT
IFT-303
-5
Repeat steps 2-3 through 2-4 to obtain the least possible distortion.
3
SIGNAL
ee
Adjust
until
the
5th
indicator
(FM)
TVR301
SIGNAL
indicator
LED
starts
to
light
up.
Afterwards, disconnect the DC voltmeter.
¢ Output level:
4-1 Check | OUTPUT
v.1V +3 dB
4-3-2 FM STEREO ALIGNMENT
ADJUSTMENT
Fine-adjust for min.
distortion
2
FM
sensitivity
OUTPUT
and distortion
(cont'd)
NO
>
RO
4 FM mono
output level
Note the actually
measured level as ref-
erence for 5-1.
¢ Distortion: 0.12%
Initial tuner settings:
FM/AM function selectors: FM
AUTO TUNING : ON
MONO/ST
: STEREO
ADJUSTMENT POINT MEASURING POINT ADJUSTMENT
e Stereo modulator: |
Pilot: 8% (6.0 kHz)
L + R (MAIN): 90% (67.5 kHz)
Modulation frequency: 1 kHz
° FM SG:
Frequency: 98 MHz
Level indication: 72 dB (Tuner ANT input: 65 dBf)
T-X150
Connect frequency
counter between
and GND.
Stereo modulator:
PILOT sw: OFF
Frequency counter:
19 kHz (+50 Hz)
1 VCO frequency
Between P9 and GND
Frequency counter:
to be stabilized at
19 kHz.
Stereo modulator:
PILOT sw: ON
T-X150
Disconnect frequency
counter.
Stereo modulator:
OUTPUT MODE sw: L
als To be illuminated when
STEREO indicator 19 kHz is stabilized.
Stereo
modulator:
Minimize
1
kHz
leakage
OUTPUT MODE sw: R L-ch of L-ch.
Repeat steps 2-1 and 2-2 until the level of leakage at each channel becomes equal.
¢ Distortion: 0.3%
¢ FM separation:
40 dB
Minimize 1 kHz leakage
of R-ch
OUTPUT
2 FM stereo
separation
e Stereo modulator:
OUTPUT MODE sw:
L + R (MAIN)
3 FM stereo
output level
Check OUTPUT
T-X150
4-4 AM SECTION
Test loop antenna
Antenna
OSCILLOSCOPE
DISTORTION
METER
AM SIGNAL
GENERATOR
Fig. 4-2 Test setup for AM section alignment
4-4-1 AM ALIGNMENT
Initial tuner settings:
FM/AM function selectors: AM
MODE : Any position
ITEM
SETTING
ADJUSTMENT
POINT
MEASURING
POINT
ADJUSTMENT
1
AM
tracking
|
No
adjustment
required.
¢
Connect
the
test
loop
antenna
only
to
the
AM
SG
and set
as
illustrated
in
Fig.
4-2.
e AM SG:
Frequency: 603. kHz
Modulation:
1
kHz,
30%
OUTPUT
Level
indication:
100
dB
Disconnect
the
test
loop
antenna
from
the
AM
SG.
Connect
the
200
pF
dummy
antenna
between
the
AM
SG
and
T-X150's
AM
antenna
terminal.
¢ AM SG:
SF SM Out Tener Frequency: 999 kHz
Level indication: 74 dB
| ¢ T-X150:
2-2
3-1
3-2
Tune to 999 kHz
4 SIGNAL AM SM semi-fixed
indicator (AM) resistor
AM ANT-L core
I
AM OSC-L core
|
AM IF transformer
<
2 AM sensitivity
Fine-adjust for max.
and distortion
output level with min.
distortion
° Output level: —
230 mV + 3 dB
* Distortion: 1%
Adjust until the 5th
LED starts to light up.
OUTPUT
SIGNAL indicator