EasyManua.ls Logo

Hitachi D-E25 - Adjustment; Tape speed; Head azimuth; Playback gain

Hitachi D-E25
9 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
D-E25
D-E25
|
ADJUSTMENT
Perform
the
following
adjustments
in
the
sequence
stated
after
cleaning
the
head,
pressure
roller,
and
capstan
with
a
head
cleaning
stick
moisted
in
alcohol.
Also,
unless
specially
indicated
otherwise,
set
the
switches
and
controls
to
the
positions
indicated
in
the
table.
[Smoot
wo
|
Swichesand
Gonvom
[Postion
|
Symbol
Wo
Tape
select
switches
ER/UD
(NOR)
Measuring
Instrument
and
Connection
Check
Measuring
Input
Output
Tape
Instrument
Terminal
|
Terminal
MTT
-111,
1
|
Tape
=
Frequency
pe
3000
Hz
Playback
speed
counter
OUT
(3150
Hz*)
(3150
Hz*)
Head
LINE
MTT
-316,
Output
i
MTT-150.
RTL,
R
775
mV
See
Note
3
tie
LINE
400
Hz
|
-VTVM
OUT
:
Playback
;
:
bevel
20m
RTAL
R
Level
indi-
i
iiccatay
Maxwell
'
ltl
vere
See
Note
4
Set
the
tape
select
switches
(S4,
S5)
to
CrO2
position.
Bias
leakage
-
Frequency
-
_
er
fe
=
-
Bias
Set
RT3L,
R
to
the
center.
-
Audio
oscillator
Out
put
(3)
Seceauett,
LINE:
2)
SEINE
ER/UD
Record/
RTSL._R
|
difference
)
IN
OUT
tape
playback
:
within
-
Attenuator
+0.5
dB
-
VTVM
Level
7
LINE
ER/UD
Record/
indicators
IN
tape
playback
Rien
indicate
0dB
P
-
Audio
oscillator
(5
kHz)
LINE
Boosted
by
Dolby
NR
|.
vtva
IN
eran
Regard
we
8dBm+0.1dB
Note
:
1,
Adjust
within
30
sec.
after
heat-running
for
more
than
3.
Playback
a
test
tape
(MTT-150,
400
Hz
20m
Maxwell)
20
minutes.
and
adjust
RT1L,R
so
that
the
level
of
LINE
OUT
9.When
the
maximum
values
of
both
channels
are
dif-
jacks
become
775
mV.
ferent,
tune
to
the
maximum
value
of
the
L
channel.
In
4.
With
the
condition
shown
in
item
3,
adjust
RT4L,
R
so
this
case,
the
difference
between
the
maximum
values
that
the
level
indicators
indicate
0
dB.
of
both
channels
should
be
within
2
dB.
Switches
and
Controls
Record
level
controls
*
According
to
DIN
45
500
Adjusted
Position
Adjusted
3000
Hz
Semi-
variable
resistor
in
the
motor
See
Note
1
Azimuth
adjusting
screw
See
Note
6
current
See
Note
7
Record/
-
Audio
playback
oscillator
output
(400
Hz,
0dB)
See
Note
8
level
See
Note
9
(
5.
Set
the
tape
select
switches
(S4,S5)
to
the
CrO2
position
in
the
recording
mode.
Adjust
L2
so
that
the
that
the
output
level
difference
between
two
fre-
quencies
is
within
+0.5
dB
measured
at
the
LINE
bias
frequency
of
TP2L,
R
becomes
83—85
kHz.
OUT
jacks.
6.
Adjust
RT5L,R
so
that
the
bias
voltage
between
8.
1)
Feed
a
400
Hz
signal
to
the
LINE
IN
jacks
in
the
TP3L,
R
and
TP4L,
R
becomes
10V
in
the
recording
recording
mode
and
adjust
the
audio
oscillator
mode.
output
so
that
the
level
indicators
indicate
0
dB.
7.
1)
Set
RT3L,
R
to
the
center.
2)
Record
the
signal
on
ER/UD
tape
with
the
conditions
2)
Feed
a
1kHz
signal
to
the
LINE
IN
jacks
in
the
of
item
1).
recording
mode
and
adjust
the
audio
oscillator
3)
Playback
the
recorded
signal
and
adjust
RT3L,
R
so
output
so
that
the
level
indicators
indicate
0
dB.
that
the
level
indicators
indicate
0
dB.
Then,
adjust
the
attenuator
to
lower
the
output
level
9.
Feed
a
5
kHz
signal
to
the
LINE
IN
jacks
in
the
recor-
by
23
dB.
ding
mode
and
adjust
the
audio
oscillator
output
so
3)
Record
the
signal
on
ER/UD
tape
with
the
conditions
that
the
level
of
TP1L,
R
becomes—30.4
dBm
+0.1
dB.
of
item
2),
then
continue
to
record
with
the
audio
Then,
adjust
RT2
so
that
the
level
is
boosted
by
8
dBm
oscillator
frequency
set
to
13
kHz.
+0.1
dB
when
the
Dolby
NR
switch
(S2)
is
set
to
ON.
4)
Playback
the
recorded
signal
and
adjust
RT5L,
R
so
:
INSPECTION
OF
MECHANISM
cm
Cs
Supply
side
1
to
3
gr-cm
Without
counter
0.05
to
0.5mm
More
than
10
gr-cm
Flywheel
thrust
gap
Brake
force
50
gr+50gr
Note
1.
Pressure
of
pressure
roller
350
gr+50g
Set
this
unit
in
the
playback
mode
and
press
the
Capstan
pressure
roller
in
the
direction
of
the
arrow
using
a
fan
type
tension
gauge,
and
measure
the
pressure
when
the
pressure
roller
is
released
from
the
capstan.
Pressure
roller
LUBRICATION
Lubricate
one
or
two
drops
of
oil
to
rotating
point
or
lubricate
grease
to
sliding
point.
Lubricate
the
respective
parts
listed
once
every
1000
hours
or
once
a
year
under
normal
conditions
of
use.
Avoid
oiling
them
excessively,
or
rotation
may
become
irregular
because
of
oil
splashes.
Metal
and
metal
Pan
motor
dl
Rot
(10W-40)
Delran
ls
Mold
and
metal
Sonic
slideroi
fl
(#1600)
_
Metal
and
metal
Hitasol
(MO.138)
Sliding
section
|
Mold
and
mold
White
grease
Mold
and
metal
(FL-LUBE-A)
Spring
resonance
prevention
Froil
(GB-TS-1
)

Related product manuals