Yamaha TX-550 - Digital Control System; Memory Preset Operation; Tuning Mode Selection

TX-550
Step
Item
to
be
adjusted
Connection
terminal
Instrument
required
Adjustment
locations
Adjustment
method
Rating
or
standard
1
Sensitivity
AM
ANT
AM
dummy
antenna
AM SG
630kHz
1080kHz
1440kHz
60dB^i
MONO
400Hz
30%
MOD.
T2
Adjust
T2
at
630kHz,
1080kHz,
1440kHz
to
make
the
output
reading
maximum
when
the
preset
CH
B-1,
B-2
and
B-3 are
received
accordingly.
OUTPUT
ACVM
2
Verification
of
Signal
meter
AM
ANT
AM
dummy
antenna
AM
SG
1080kHz
lOOdB^
400Hz, 30%
MOD.
All signal
quality
indicators
light up.
3
Verification
of
Signal
meter
AM
ANT
AM
dummy
antenna
Check
that
all the
signal
meters
are
turned
off.
4
Verification
of
auto-search
AM
ANT
AM
dummy
antenna
AM
SG
1080kHz
60dB^i
400Hz, 30%
MOD.
Check
that auto
search
reception
is
possible
with the
TUNING
knob.
Tuning
MODE
AUTO
(DIGITAL
CONTROL
SECTION)
Step
Confirmation
Item
Connection
terminal
Instrument
required
Operation key Confirmation
method
1
Preset
memory
75Q
FM ANT
FM
SG,
SSG
98.1MHz
±
1kHz
70dBp
STEREO,
L,
RIkHz. 100%
MOD.
FM, AM
TUNING
MODE
TUNING
{UP
or
DOWN)
MEMORY
PRESET
STATION
P1-P8
1
.
Receive
FM
98.1MHz
by
means
of
auto
search.
2.
Press
MEMORY key
MEMORY
indicator
flashes
about 5
seconds.
3. Select A with
A/B/C/D/E
SW.
“A”
lights.
4.
Press
PI
“1”
lights
and
MEMORY
indicator goes
off.
MEMORY
indicator
goes
OFF
A1
indicator
lights.
AM ANT
AMSG
AM dummy
antenna
1080kHz
±
0.1kHz
80dB^
400Hz, 30%
MOD.
A/B/C/D/E
5.
Receive
AM 1080kHz.
6.
Press
MEMORY
key
MEMORY
indicator
flashes about
5
seconds.
7.
Select
B with
A/B/C/D/E
SW.
"B"
lights.
8.
Press
PI
->
“1
’’
lights
and
MEMORY
indica-
tor
goes
off.
MEMORY
indicator
goes
OFF
B1
indicator
lights.
9.
Press
A1
and
B1 and
check that
Contentis
read out
properly.
A1 and B1
light.
2
Tuning modes
Same
as
step
1
Same
as step
1
FM
TUNING MODE
TUNING
{UP
or
DOWN)
Tune
to
FM
98.1MHz
and
check
that
during
MAN'UMONO
reception
FM
is forced
monaural.
AUTO ST
indicator goes
off.
STEREO
indicator
goes
off.
8