Sharp RT-1157H - Page 9

RECORD/PLAYBACK
HEAD
AZIMUTH
ADJUSTMENT
(Refer
to
Figure
11—2)
i
2;
)a
PLAYBACK SENSITIVITY ADJUSTMENT
a4)
¢
es"
CR Oscillator
Attenuator
RECORD Mode
LINE IN Jacks (J3A, J3B)
or MIC Jacks (J1, J2)
Figure 11—1
Connect the V.T.V.M. to the test point (TP102, TP202)
and earth.
Set the equalizer selector switch (SW2) in the “NORM”
position and Dolby NR switch (SW5) in the “OFF” posi-
tion.
Insert the test tape (TEAC MTT-114, 10kHz, 250pWb/mm,
—10dB recorded) and play it.
PLAYBACK Mode
RECORD/
PLAYBACK
A.
Adjust
the
adjusting
screw
so
that
the
playback
output
voltage
of
the
test
tape
becomes
maximum
in
both
sides
and
the
phase
between
channels
gets
same.
TP102
or TP202
HEAD Figure 11-2
Connect the V.T.V.M. to the test point (TP102, TP202)
and earth.
Set the equalizer selector switch (SW2) in the “NORM”
position and Dolby NR switch (SW5) in the “OFF” posi-
tion.
CORD
Figure
3,
Insert
the
test
tape
(TEAC
MTT-150,
400
Hz,
200pWb/mm
recorded)
and
play
it.
4. At this time, adjust the semi-variable resistor (VR101
VR201) so that the V.T.V.M. reads 580 mV.
TP102
or TP202
11-3
£q4=
V.T.V.M
{Refer to Figure 11-3)
V.T.V.M
Oscilloscope
Oscilloscope
LEVEL
METER
SENSITIVITY
ADJUSTMENT
(Refer
to
Figure
12-1)
\1.
2
3
Connect
the
V.7.V.M.
to
the
test
point
(TP102,
TP202)
and
earth.
Set
the
Dolby
NR
switch
(SW5}
in
the
“OFF”
position,
and
input
selector
switch
(SW4}
in
the
“LINE”
position.
With
the
unit
at
record
mode,
give
it
signal
of
1
kHz,
320
mV
from
line
input
jacks
(J3A,
J3B)
and
adjust
the
record
level
controls
{VR102,
VR202)
so
that
the
V.T.V.M.
reads
5BO
mV.
CR Oscillator
Attenuator
4. At this time, adjust the semi-variable resistor (VR104,
VR204) so that the level meter indicates Dolby level
(it means a level of ‘+3 VU” indicated on the level meter).
TP102 V.T.V.M_ Oscilloscope
J
| KHz LINE IN Jacks (J3A, J3B) 58 OmvV
Figure 12—1
-RECORD/PLAYBACK
SENSITIVITY
ADJUSTMENT
(Refer
to
Figure
12—2)
4
2
Connect
the
V.T.V.M.
to
the
test
point
(TP102,
TP202)
and earth.
Set Dolby NR switch (SWS) in the “OFF” position, and
input selector switch (SW4) in the “LINE” position.
. Set the equalizer selector switch (SW2} in the “NORM”
pasition and bias selector switch (SW3) in the “NORM”
position.
_ Insert the normal tape (TEAC MTT-502).
_
With
the
unit
set
at
record
mode,
give
it
signal
of
1
kHz,
320
mV
from
line
input
jacks
(J3A,
J3B)
and
adjust
the
record
level
controls
(VR102,
VR202)
so
that
the
V.T.V.M.
reads
410
mV.
_ And playing it.
CR Oscillator
Oscilloscope V.T.V.M
7. Adjust the semi-variable resistor (VR103, VR203} so that
the V.T.V.M. reads 410 mV.
8. To check the CrO2 tape (MAXELL C-60UDXL Il), leave
equalizer selector switch (SW2) in the “CrO2” position
and bias selector switch (SW3) in the ‘CrO2“ position.
9. It is normal if V.T.V.M.’s reading is 340 mV to 490 mV.
RECORD Mode TAPE
Figure 12—2