Onkyo TA-630D

PTA-630D
ELECTRICAL ADJUSTMENT PROCEDURES
PRECAUTIONS
1. Tape required: 3. The switches and controls should be set as follows unless
(1)
Blank
tape
:
otherwise
specified.
MAXELL
UD-XL/I
(Normal)
Accu
bias
adjust
control:
Center
UD-XL/II
(CrO2)
Accu
bias
switch:
Off
SONY
Duad
(FeCr)
Tape
selector
bias
switch:
Normal
Tape selector equalizer switch: Normal
(2)
Test
tape
Dolby
NR
switch:
Out
VICTOR
VTT-658
10
kHz,
—15
dB
Input
selector
switch:
Line
TEAC
MTT-111
3
kHz,
—10
dB
Output
level
control:
Maximum
MTT-150
—
Dolby
level
calibration
Input
level
control:
Maximum
tone. FM de-emphasis switch: 25 psec.
2. Instrument required:
(1) AC VTVM
(2) Frequency counter
(3) AF oscillator
(4) Attenuator
1. PLAYBACK MODE ADJUSTMENT 1-4. VU meter adjustment
1-1. Head azimuth adjustment PROCEDURES:
PROCEDURES: 1) Play the test tape MTT-150 back.
1) Play the 10 kHz portion of the test tape VTT-658 ) Aflests to che Doloy mark Co s3aB) ae
back. Adjust the head azimuth adjusting screw for meter
maximum V.T.V.M. read.
2) If the peak output reads of the right and left 1-5. Playback frequency response adjustment
channels are different, set the screw to obtain the Connect the AC VTVM to the TP-103 and TP-104 test
5) Mechanica center petween the Pee bond point. Play the test tape VIT-658 back.
J Ww ne. Adjust the voltage to 150 mV with R133 and R134.
VTVM
47 kQ VTVM
=
Unit
Feo
j
a7
KO
mee =
Line Out
TP-103, TP-104
1-2. Tape speed adjustment
PROCEDURES:
}
JUSTMENT
Play
the
3
kHz
portion
of
the
test
tape
MTT-111
back,
2°
RECORDING
MODE
ADJU)
Adjust
the
tape
speed
adjusting
semi-fixed
resistor
in
2-1.
Bias
coil
trap
coil
adjustment
the
motor
for
3,000
to
3,010
Hz
counter
indication.
1)
Set
the
tape
deck
in
the
recording
mode
of
opera-
FREQUENCY
COUNTER
tion.
7
2)
Set
the
Bias
selector
switch
to
CrO,
position.
3)
Connect
the
AC
VTVM
to
TP-105
and
TP-106
test
point.
4)
Adjust
L111
and
L112
for
minimum
VTVM
read.
Line Out
1-3. Playback output adjustment
PROCEDURES:
1) Play the test tape MTT-150 back, adjust R 135 and
R136 for 775 mV V.T.V. M. read. |
2) Proceed both for the left and right channels in the
same manner.
VTVM
47 kQ
-_ Unit OE
TP-103, TP-104
10