Technics RS-M14 User manual
ORDER
NO.
ARD-8004036C
Service
Manual
Cassette
Deck
RS-M14
(
Silver
load
Black
Face
Metal
Tape
Compatible
Stereo
Cassette
Deck
with
Peak-Hold
FL
Meters,
Soft-Touch
Controls
and
Rewind
Auto-Play
Convenience
DO
[sacevavsrem)
This
is
the
Service
Manual
for
the
following
areas.
wees
For
all
European
areas
except
United
Kingdom.
s+
For
United
Kingdom.
cei
ass
For
Asia,
Latin
America,
Middle
East
and
Africa
areas.
Al
see
sires
For
Australia.
a
For
Asian
PX.
naib
ants
For
European
PX.
RS-M24
MECHANISM
SERIES
Specifications
Track
system:
4-track
2-channel
stereo
recording
and
playback
Outputs:
LINE;
output
level
420
mV,
output
impedance
Tape
speed:
4.8cm/s
1.5kQ
or
less,
load
impedance
22kQ
over
Wow
and
flutter:
0.05%
(WRMS),
+0.14%
(DIN)
oh
output
level
80mV,
load
imped-
;
2
ance
Prequeney
esponces
Metal
Tapes
oe
na
+
(DIN)
Rec/Pb
connection:
5P
DIN
type;
CrOo/Fe-Cr
tape:
20-18
000Hz
input
sensitivity
0.25
mV,
impedance
5.3kQ
:
pe;
3016
O00Hz
(DIN)
output
level
420
mV,
impedance
5.2kQ
Normal
tape:
20—17,000Hz
Bias
frequency:
80
kHz
30—15,000Hz
(DIN)
Motor:
Electrical
DC
governor
motor
Signal-to-noise
ratio:
Dolby
NR
in;
67
dB
(above
5kHz)
Heads
:
2-head
system;
1-MX
head
for
record/playback
Dolby
NR
out:
57
dB
(signal
level=max.
record-
i
disubiecera
tents
heatl
tov
amseults
ing
level,
Fe-Cr/CrOz
type
tape)
Fast
forward
and
Power
requirements:
AC;
110/125/220/240V,
50-60Hz
rewind
time:
Approx.
90
seconds
with
C-60
cassette
tape
Power
consumption:
15
W
(for
European
areas
and
Australia)
Inputs:
MIC;
sensitivity
0.25
mV,
input
impedance
25kQ
13
W
(for
Asia,
Latin
America,
Middle
East,
Africa
over
applicable
microphone
impedance
4002—
areas
and
PX.)
Dimensions:
43,0cm(W)
X
11.9cm(H)
x
24.6cm(D)
LINE;
sensitivity
60mV,
input
impedance
40kQ2
Weight:
4.3kg
Specifications
are
subject
to
change
without
notice.
*
‘Dolby’
and
the
double-D
symbol
are
trademarks
of
Dolby
Laboratories.
@
Panasonic
Tokyo
ec
|
2
1CS
Matsushita
Electric
Industrial
Co.,
Ltd.
Matsushita
Electric
Trading
Co.,
Ltd.
17-15,
6-chome,
Shinbashi,
Minato-ku,
Tokyo
105
Japan
P.O.
Box
288,
Central
Osaka
Japan
RS-M14
CONTENTS
ITEM
|
PAGE
LOCATION
OF
CONTROLS
AND
COMPONENTS
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DISASSEMBLY
INSTRUCTIONS
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2
DISASSEMBLY
NOTES
(MECHANISM
UNIT)
ccccccssrsscreeteeeceeceeetseeccteceessesecceseeeenseresseeas
3
ASSEMBLY
INSTRUCTIONS:
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ADJUSTMENT
PARTS
LOGATION:
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5
MEASUREMENT
AND
ADJUSTMENT
METHODS
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6
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PARTS
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11
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PARTS.
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13
LOCATION
OF
CONTROLS
AND
COMPONENTS
@
Power
switch
@
Cassette
holder
@®
_
Headphones
jack
@
Eject
button
®
Record
button
©
Rewind/review
button
@
Fast
forward/cue
button
Playback
button
@
Stop
button
Pause
button
@
Input
selector
@
Dolby
noise-reduction
switch
@)
Tape
selector
(tape
select-normal/Fe-Cr/CrO2/metal)
Record
muting
button
@®
Input
level
controls
Tape
counter
and
reset
button
@
Record
indication
lamp
FL
(fluorescent
level)
meter
Microphone
jacks
@
Line
output
jacks
@)
Record/playback
connection
socket
@
Line
input
jacks
@
Voltage
selector
RS-M14
DISASSEMBLY
INSTRUCTIONS
*
The
head
azimuth
can
be
adjusted
by
removing
the
(C)
cassette
lid.
To
remove
——
. :
|
Shown
in
fig.
——.
Case
cover
°
4
screws
3
—
Bottom
cover
°
3
screws
*
2
control
knobs
Front
panel
°
Cassette
lid
°
4
screws
WwW]
ks
&
ol
°
4
red
screws
°
Tape
select
knob
*
3
push
buttons
°
4
screws
Main
circuit
board
¢
Cassette
holder
°
2
black
screws
¢
4
screws
Chassis
cover
assembly
and
mechanism
unit
CO}INNNINNN®D
Operation
button
assembly
°
2
screws
RS-M14
DISASSEMBLY
NOTES
©
Precautions
for
removal
of
the
motor
When
removing
the
motor,
follow
the
procedure
given
below.
1.
Remove
screw
(A),
and
then
detach
flywheel
retainer
(M44)
by
pulling
it
in
the
direction
of
the
arrow
as
in
fig.
9.
2.
After
removing
screws
(B),
detach
takeup
belt
(M78)
and
capstan
belt
(M76),
and
then
sub
chassis
assembly
(M72)
can
be
rernoved.
(fig.
9,
10)
3.
When
screws
(C)
is
removed
after
detaching
fast
forward
belt
(M77),
motor
assembly
(M71)
can
be
removed.
(fig.
10)
Fast
Forward
Belt(M77)
Screw(C)
Sez"
2
|
iy
ee
Tews
Sub
Chassis
Assembly
(M72)
Fig.
10
©
Head
base
plate
(M57)
and
upper
base
plate
(M83)
removing
procedure
1.
With
screw
(D)
removed,
head
base
plate
pressure
spring
(M66)
can
be
detached.
In
this
case,
take
care
not
to
lose
steel
ball
(M65).
(fig.
11)
2.
With
head
release
spring
(M68)
removed,
head
base
plate
(M57)
can
be
detached.
(fig.
11,
12)
In
this
case,
take
care
not
to
lose
steel
ball
(M65)
and
roller
(M64).
3.
After
removing
pressure
roller
release
spring
(M25),
remove
pressure
roller
assembly
(M40).
(fig.
12)
4,
Remove
screw
(E),
and
then
upper
base
plate
(M83)
can
be
detached.
(fig.
12)
(MECHANISM
UNIT)
Sub
Chassis
Assembly
(M72)
Takeup
Belt
(M78)
Screw
(A)
Capstan
Belt
(M76)
/
Flywheel
Retainer(M44)
;
Flywheel
a
1
Retaimer
(m44)—
|
1
!
|
|
|
!
1
|
|
I
|
|
!
Head
Base
Plate
Pressure
Spring(M66)
Head
Base
Plate(M57)
|
Screw(D)
Steel
Ball(M65)
Head
Release
Spring(M68)
Fig.
11
Steel
Ball(M65)
Roller(M64)
Pressure
Roller
Release
Spring
(M25)
Upper
Base
Plate(M83)
Screw(E)
Pressure
Roller
Assembly
(M40)
Fig.
12
MECHANISM
SECTION
1.
For
repair,
measurement
or
adjustment
with
the
mechanism
removed
from
the
unit
be
sure
to
ground
the
lower
base
plate
of
the
mechanism.
2.
For
grounding,
connect
a
extension
cord
to
the
mechanism's
lower
base
plate
and
the
Lug
terminal
from
main
circuit
board.
3.
Without
grounding,
the
amplifier
does
not
operate
properly.
Fig.
13
ASSEMBLY
INSTRUCTIONS
;
Capstan
Belt
(M76)
e
Belt
mounting
Fast
Forward
Belt
(M77)
Takeup
Belt
(M78)
Check
that
each
belt
is
free
of
damage
or
grease
on
the
surface,
after
that,
set
the
belt
as
illustrated,
and
mount
it
on
the
lower
base
plate
(M84)
after
that,
set
the
takeup
belt
(M78)
on
the
fast
forward
connection
pulley
assembly
(M82).
é
Fig.
14
@
Positioning
the
takeup
reel
table
assembly
1
RS
dakodties
Detection
Lever
M50:
Takeup
Reel
When
installing
the
takeup
reel
table
assembly,
be
sure
to
Table
Assembly
mount
the
auto-stop
friction
hub
(shown
in
fig.
16),
as
illustrated
in
fig.
15.
If
the
takeup
reel
table
is
positioned
incorrectly
at
any
place
other
than
that
shown
in
fig.
15,
the
auto-stop
mechanism
remains
operative
at
all
times.
Auto-Stop
Auto-Sto
. .
i
Pp
Friction
Hub
Friction
Hub
Fig.
16
@
How
to
install
the
flywheel
retainer
PAS
WAS
REbAIRE
1.
Insert
the
thrust
retainer
into
the
hole
@)
of
the
flywheel
Hole
®
retainer
as
shown
in
fig.
17.
2.
Hold
the
thrust
retainer
with
the
thumb
as
shown
in
;
fig.
18.
GS
)
Thrust
Retainer
Flywheel
Hold
this
part
with
the
thumb
Fig.
17
Fig.
18
3.
Engage
the
parts
@)
and
©
of
the
flywheel
retainer
with
the
lower
base
plate
as
shown
in
fig.
19.
4.
Shift
down
the
flywheel
retainer,
supported
at
points
©,
in
the
direction
of
the
arrow
as
illustrated.
(fig.
20)
5.
Attach
the
screw
(A)
in
the
position
as
shown
in
fig.
9.
e
Mounting
the
operation
button
assembly
Before
mounting
the
operation
button
assembly
on
the
mechanism
body,
be
sure
to
lift
the
main
control
lever
in
the
direction
of
the
arrow
using
a
screwdriver,
as
shown
in
fig.
21,
until
it
locks
in
place.
M8:
Main
Control
Lever
Hub
of
the
Playback
Button
Assembly.
Screwdriver
If
it
is
not
mounted
in
this
manner,
the
hub
of
the
playback
—
button
assembly
during
playback
catches
on
the
main
control
lever,
making
it
impossible
to
release
playback
mode.
Spt
eOM
EET
ON
Meaty
Fig.
21
Tape
Speed
Adjustment
VR.
TP3
TP4
TP2 TP5 TP6
TP8~
TP7
VR7
VR8&
TPl
L2
L1
VR6
tp
ii.
%
i
\
R6
6)
/
ee
poe
ra
Ss
TP9
TP10
/
TP12
4
R62!
VR5
VR402
VR1
VR2
VR401
NY
F
5
Fig.
22
MEASUREMENT
AND
ADJUSTMENT
METHODS
NOTES:
Keep
good
condition,
set
lever
switches
and
controls
in
the
following
positions,
unless
otherwise
specified.
@
Make
sure
heads
are
clean.
@
Make
sure
capstan
and
pressure
roller
are
clean.
©
Judgeable
room
temperature:
20-£5°C
(68+9°F)
e
Dolby
NR
switch:
OUT
ITEM
MEASUREMENT
&
ADJUSTMENT
®
Head
position
adjustment
Condition:
*
Playback
and
pause
mode
®
Head
azimuth
adjustment
Condition:
*
Playback
mode
Equipment:
*VTVM
—
*
Oscilloscope
*
Test
tape
(azimuth)
---QZZCFM
*
Test
tape
(tape
path
viewer)
@
Tape
speed
Condition:
*
Playback
mode
Equipment:
*
Digital
electronic
counter
or
frequency
counter
*
Test
tape
---
QZZCWAT
“2.
Playback
this
tape.
®
Tape
selector:
Normal
position
@
Input
selector:
Line
in
@
Input
level
controls:
Maximum
Screw
(A)
—
Head
Adjusting
Plate
Capstan
)
(B)
4
Pressure
Roller
(The
head
adjusting
plate
is
provided
to
adjust
the
tape
touch
of
the
head
in
cue
or
review
mode.)
1.
Press
the
playback
button
and
pause
button.
2.
Measure
the
space
between
the
pinch
roller
and
the
capstan.
Standard
value:
0.5+0.3mm
Space
(adjustable)
3.
If
the
measured
value
is
not
within
the
standard
value,
untighten
screw
(A),
and
slide
the
head
adjusting
plate
in
the
direction
of
arrow
(B)
for
adjustment.
Record/playback
head
azimuth
adjustment
1.
Test
equipment
connection
is
shown
in
fig.
24.
2.
Playback
azimuth
tape
(QZZCFM
8
kHz).
3.
Adjust
record/playback
head
angle
adjustment
screw
(B)
LINE
OUT
Playback
mode
VTVM
Oscilloscope
in
fig.
25
so
that
output
level
at
LINE
OUT
becomes
“*™*
Fig.
24
maximum.
4.
Measure
both
channels,
and
adjust
levels
for
equal
output.
5.
After
adjustment
lock
head
adjustment
screw
with
lacquer.
Record/playback
mode
Erase
head
Erase
head
azimuth
adjustment
1.
Test
equipment
connection
is
the
same
above
but
use
the
tape
path
viewer
(QZZCRD)
instead
of
test
tape
(QZZCFM).
fh
fe
(B)
Fig.
25
Fig.
26
3.
Adjust
screw
(C)
shown
in
fig.
26
so
that
the
tape
may
not
get
curled
or
malformed
by
tape
guide
of
the
erase
head.
.
After
adjustment,
lock
head
adjust
screw
with
lacquer.
Tape
speed
accuracy
1.
Test
equipment
connection
is
shown
in
fig.
27.
2.
Playback
test
tape
(QZZCWAT
3,000Hz),
and
supply
playback
signal
to
frequency
counter.
3.
Measure
this
frequency.
4.
On
the
basis
of
3,000Hz,
determine
value
by
following
formula:
Test
tape
Playback
mode
Digital
electronic
counter
Fig.
27
f
—
3,000
3,000
.
Take
measurement
at
middle
section
of
tape.
Tape
speed
accuracy
=
x
100(%)
where,
f=
measured
value
Standard
value:
1.5%
Adjustment
method
1.
Playback
the
test
tape
(middle).
2.
Adjust
so
that
frequency
becomes
3,000
Hz.
3.
Tape
speed
adjustment
VR
shown
in
fig.
22.
ITEM
MEASUREMENT
&
ADJUSTMENT
®
Playback
frequency
response
Condition:
*
Playback
mode
*
Tape
selector
~
++»Normal
position
Equipment:
*VTVM
—
*
Oscilloscope
*
Test
tape---
QZZCFM
@
Playback
gain
Condition:
*
Playback
mode
*
Tape
selector
---
Normal
position
Equipment:
*VTVM
—
*
Oscilloscope
*
Test
tape---
QZZCFM
Tape
speed
fluctuation
Make
measurements
in
same
manner
as
above
(beginning,
middle
and
end
of
tape),
and
determine
the
difference
between
maximum
and
minimum
values
and
calculate
as
follows:
f=
F2_
5
100
(96)
—————
f1=maximum
value,
f2
=
minimum
value
3,000
Tape
speed
fluctuation
=
Standard
value:
Less
than
1%
Note:
Please
use
non
metal
type
screwdriver
when
you
adjust
tape
speed
accuracy
on
this
unit.
Pe
Playback
frequency
response
chart
12.5kHz
1.
Test
equipment
connection
is
shown
in
fig.
24.
2.
Place
UNIT
into
playback
mode.
3.
Playback
the
frequency
response
test
tape
(QZZCFM).
.
Measure
output
level
at
315Hz,
12.5kHz,
8kHz, 4kHz,
1kHz,
250Hz,
125Hz
and
63
Hz,
and
compare
each
output
level
with
the
standard
frequency
315
Hz,
at
LINE
OUT.
.
Make
measurement
for
both
channels.
.
Make
sure
that
the
measured
value
is
within
the
range
specified
in
the
frequency
response
chart.
63Hz
125Hz
200Hz
500Hz
1KHz
500Hz
1kHz
Fig.
28
63Hz125Hz
200
Hz
.
Test
equipment
connection
is
shown
in
fig.
24.
.
Playback
standard
recording
level
portion
on
test
tape
(QZZCFM
315Hz),
and
using
VT
VM
measure
the
output
level
at
LINE
OUT.
.
Make
measurement
for
both
channels.
|
Standard
value:
around
0.39V
Adjustment
1.
If
measured
value
is
not
within
standard,
adjust
VR1
(L-CH),
VR2
(R-CH)
(See
fig.
22
on
page
5).
2.
After
adjustment,
check
“Playback
frequency
response”
again.
@
Bias
leakage
Condition:
*
Record
mode
*
Input
level
controls
---
MAX
*
Tape
selector
--»
Metal
position
Equipment:
*VTVM
—
*
Oscilloscope
@
Erase
current
Condition:
*
Record
mode
*
Tape
selector
--»
Metal
position
Equipment:
*VTVM
—
*
Oscilloscope
1.
Test
equipment
connection
is
shown
in
fig.
29.
page
2.
Place
UNIT
into
record
mode.
3.
Adjust
trap
coil
L1
(L-CH),
L2
(R-CH)
so
that
measured
value
on
VTVM
becomes
minimum.
4.
Take
adjustment
for
both
channels.
TPS(L-CH)
Record
/playback
head
Record
mode
Fig.
29
Vtvm_
Oscilloscope
1.
Test
equipment
connection
is
shown
in
fig.
30.
2.
Press
the
record
and
pause
buttons.
3.
Set
the
tape
selector
to
metal
position.
4.
Read
voltage
on
VT
VM
and
calculate
erase
current
by
following
formula:
Erase
head
Voltage
across
both
ends
of
R301
1(Q)
Era
rrent
(A)
=
VIVM
Oscillos
se
curre
t
(
)
VTVM
Oscilloscope
Fig.
30
Standard
value:
155+15mA
(Metal
position)
|
5.
If
measured
value
is
not
within
standard,
adjust
as
follows.
Adjustment
1.
Open
the
point
(A)
and
short
the
point
(B)
on
the
main
circuit
board
in
the
wiring
connection
diagram
(See
page
10).
Ee
he
ae
ITEM
MEASUREMENT
&
ADJUSTMENT
2.
Make
measurement
for
erase
current.
3.
Make
sure
that
the
measured
value
is
within
the
erase
current
of
140mA
to
170
mA.
4.
lf
it
is
beyond
the
value,
carry
out
the
following
adjustments:
@®
Bias
current
Condition:
*
Record
mode
*
Tape
selector
--
Normal
position
--Fe-Cr
position
--CrOz
position
--
Metal
position
Equipment:
*VTVM
*
Oscilloscope
@
Overall
gain
Condition:
*
Record/playback
mode
*
Input
level
controls
---
MAX
*
Standard
input
level;
MIC
+++++++-
—72+4dB
LINE
IN---
—-2444dB
Equipment:
*VTVM
*
AF
oscillator
*
ATT
*
Oscilloscope
*
Resistor
(600
2)
*
Test
tape
(reference
blank
tape)
--QZZCRA
for
Normal
®
Overall
frequency
response
Condition:
*
Record/playback
mode
*
Tape
selector
--
Normal
position
--Fe-Cr
position
--CrO2
position
--
Metal
position
*
Input
level
controls
---
MAX
Equipment:
*VTVM
*
AF
oscillator
*
ATT
*
Oscilloscope
*
Resistor
(600
2)
*
Test
tape
(reference
blank
tape)
--QZZCRA
for
Normal
--QZZCRY
for
Fe-Cr
--QZZCRX
for
CrOz
--QZZCRZ
for
Metal
.
Test
equipment
connection
is
shown
in
fig.
31.
.
Place
UNIT
into
record
mode,
and
tape
selector
to
normal
.
Read
voltage
on
VT
VM
and
calculate
bias
current
by
4
3;
6
Note:
Before
measuring
and
adjusting,
make
sure
of
the
playback
frequency
response
(For
the
.
Place
UNIT
into
record
mode,
and
tape
selector
to
normal
p
°
If
the
erase
current
is
less
than
140
mA,
short
the
point
(A).
°
If
the
erase
current
is
more
than
170mA,
open
the
points
(A)
and
(B).
VR7
(L-CH)
VR8
(R-CH)
oa
Record/playback
head
position.
Record
mode
TP1(L-CH)
;
TP2IR-CH)
R1
(L-CH)
R2
(R-CH)
following
formula:
Value
read
on
VTVM
(V)
VTVM_
Oscilloscope
10
(Q)
Bias
current
(A)
=
Fig.
31
Standard
value:
around
410A
(Normal
position)
:
.
If
measured
value
is
not
within
standard,
adjust
VR7
(L-CH)
and
VR8
(R-CH)
(See
fig.
22
on
page
5).
Set
the
tape
selector
to
each
position.
.
Make
sure
that
the
measured
value
is
within
standard.
Standard
value:
around
440A
(Fe-Cr
position),
around
545A
(CrO2
position),
around
800A
(Metal
position)
est
equipment
connection
is
shown
in
fig.
32.
Kasnitiaiies
head
i
osition.
.
Supply
1kHz
signal
(—24dB)
from
AF
oscillator,
through
ATT
to
LINE
IN.
djust
ATT
until
monitor
level
at
LINE
OUT
becomes
Record/playback
39V.
head
Record
mode
Test
tape
AF
oscillator
A
0.
.
Using
test
tape,
make
recording.
.
Playback
recorded
tape,
and
make
sure
-
value
at
LINE
—7
dB).
.
If
measured
value
is
not
0.39
V,
adjust
VR5
(L-CH),
VR6
(R-CH)
(See
fig.
22
on
page
5).
.
Repeat
from
step
(2).
Playback
mode
yTVM
Oscilloscope
Fig.
32
OUT
on
VTVM
becomes
0.39
V
(
Test
tape
Overall
frequency
response
chart
(Normal)
10kHz
seit
100s
640
Hz
2kHz
4kHz
method
of
measurement,
please
refer
to
the
playback
frequency
response).
1.
2.
3.
.
Supply
1kHz
signal
from
AF
oscillator
.
Record
each
frequency
1
kHz,
50Hz,
Test
equipment
connection
is
shown
in
fig.
32.
Place
the
normal
test
tape
(QZZCRA)
in
the
cassette
holder.
Place
UNIT
into
record
mode,
and
tape
selector
to
normal
position.
:
100Hz
Fig,
Hz
2kHz
33
50Hz
Overall
ee
response
chart
(Fe-Cr,
CrO2,
Metal)
2kHz
12kHz
through
ATT
to
LINE
IN.
200
Hz
640
Hz
.
Adjust
ATT
so
that
input
level
is
—20dB
below
standard
recording
level
(standard
recording
level=0
VU).
.
At
this
time,
LINE
OUT
level
indicates
0.039V.
200
Hz.
640
Hz
200Hz,
4kHz,
8kHz
and
10kHz
(12kHz
Fig.
34
for
Fe-Cr,
CrOz
and
metal).
mee
50Hz
.
Playback
and
express
in
dB
the
difference
between
‘plavbaek
output
level
of
each
frequency
based
on
playback
output
level
of
1
kHz.
.
Make
sure
that
the
measured
value
is
within
the
range
specified
in
the
overall
frequency
response
chart
(Shown
in
fig.
33).
.
Change
test
tape
to
Fe-Cr
(QZZCRY),
CrO2
(QZZCRX)
and
metal
(QZZCRZ).
.
Set
the
tape
selector
to
each
position.
.
Measure
in
the
same
manner
from
step
(3)
to
step
(8).
.
Make
sure
that
the
measured
value
is
within
the
range
specified
in
the
overall
frequency
response
chart
for
Fe-Cr,
CrO2
and
metal
tape
(Shown
in
fig.
34).
Adjustment
—
Using
bias
current
1.
When
the
frequency
response
between
the
middle
and
high
frequency
range
becomes
higher
than
the
standard
value,
as
*
shown
by
the
solid
line
in
fig.
35’
increase,
refer
to
bias
current
adjustment.
.
When
it
becomes
lower,
as
shown
by
dotted
line,
refer
to
bias
current
adjustment.
Note:
For
the
method
of
bias
current
measurement,
refer
to
“Bias
current
adjustment”
on
page
8.
1kHz
=
2kHz
;
8kHz
12kHz
@
Fluorescent
meter
.
Test
equipment
connection
is
shown
in
fig.
32.
Condition:
.
As
shown
in‘tig.
36,
connecting
the
base
of
Q402
and
*
Record
mode
ground
stops
the
oscillation
of
the
astable
multivibrator
*
Input
level
controls
---
MAX
comprising
Q402
and
Q403.
*
Tape
selector
.
Supply
1kHz
signal
(—24
dB)
to
the
LINE
IN
then
press
.--
Normal
position
the
record
button.
.
Adjust
the
ATT
so
that
the
output
level
at
LINE
OUT
becomes
0.39V
(The
input
level
at
this
condition
is
termed
the
standard
input
level).
.
Adjustment
at
“—20
dB”:
A.
Adjust
the
ATT
so
that
the
input
level
is
—20dB
below
standard
recording
level.
ao
B.
Adjust
VR401
so
that
the
—20dB
segment
at
ights
up
in
the
~200.8dB
range
(L-CH
—.
SU/IIIMIUIIIIIIIIIIIIIIIIIIIIIIUIIUI1111111111HIHI1
only)
(See
fig.
37).
ray
.
Adjustment
at
“OdB”:
2
6+
4°25
0
2
00
+66
A.
Adjust
the
ATT
so
that
the
output
level
at
Fig.
37
LINE
OUT
becomes
0.39
V.
ei
scence
(The
input
level
at
this
condition
is
termed
MYTYTETTYYT
TTY
=
(+108)
the
standard
input
level.)
STMT
UU
MT
.
Adjust
VR402
so
that
the
+1dB
segment
a;
el
a
oe
ak
an
lights
up
in
the
O+0.2dB
range
of
the
pan
lhe
abated
standard
input
level
(See
fig.
38).
":
.
Repeat
twice
between
steps
(5)
and
(6)
above.
Mmm
ccc
cece
.
Adjust
ATT
and
check
that
all
segments
lights
shaven
asuaaaviasiauiatas
Sarasa
up
when
an
input
signal
level
is
increased
to
STILT
ATLA
UU
10
dB
higher
than
the
standard
input
level
(See
20
PEAK)
6
*
42+
20
2
(«6
8»
(1048)
Equipment:
*VTVM
—
*
AF
oscillator
*
ATT
*
Resistor
(600Q)
@
Dolby
NR
circuit
.
Test
equipment
connection
is
shown
in
fig.
40.
Condition:
.
Place
UNIT
into
record
mode,
set
the
Dolby
NR
switch
*
Record
mode
to
OUT
position
and
supply
to
LINE
IN
to
obtain
*
Dolby
NR
switch
---
IN/OUT
—34.5dB
at
TP11
(L-CH),
TP12
(R-CH)
(frequency
cron
TPL
CH)
*
Input
level
controls
---
MAX
5kHz).
ae
ea
.
Confirm
that
the
value
at
IN
position
is
8(+2.5)dB
LINE
IN
[X
(ieee
Equipment:
se
Q
fee
aa
ter
than
the
value
at
OUT
position
of
Dolby
NR
1
*VTVM
+
AF
oscillator
a.
P
y
SOL
OOOO
OQ.
*
ATT
*
Oscilloscope
:
AF
oscillator
ATT
Record
mode
©
VTVM
*
Resistor
(600
Q)
Fig.
40
ELECTRICAL
PARTS
LOCATION
NOTE:
A
indicates
that
only
parts
specified
by
the
manufacturer
be
used
for
sefety.
Part
Name
&
Description
ELECTRICAL
PARTS
Record/Playback
Head
Erase
Head
Nut
12¢
Screw
@3X8
Washer
Tapping
Screw
®3x10
Tapping
Screw
@3X8
Tapping
Screw
®2.6X6
Lug
Terminal
FL
Meter
Holder
FL
Meter
Nut
9¢
Nut
8¢
Spring
Washer
9¢
Spring
Washer
8¢
Volume
Angle
Recording
Wire
Recording
Lever
Earth
Plate
3
Pin
Post
6
Pin
Post
3
Pin
Socket
6
Pin
Socket
Contact
AC
Power
Cord
”
”
East,
Africa
areas
and
PX.
a”
Insulation
Plate
Cord
Clamper
Ref.
No.
Part
No.
ho.
{
hed
E1
Qwy4i22z
4
E11
£10
E2
Qwy2138Z
E3
QNQ1070
4
XSN3+8S
E5
XWA3B
£6
XTN3+10B
£7
XTN3+8B
Es
XTN26+6B
E9
QJT0015
E10
QKJ0406
Ell
QSIFLOOIF
E12
QNQ1039
E13
QNQ1004
E14
QWQ1133
E15
QwQ2002
E16
QMA3956
E17
QBS1130
E18
QML3664
E19
QJC0034
E20
QJP1921TN
E21
QJP1922TN
E22
QJS1921TN
E23
QJS1922TN
£24
QJT1054
E25
MA}QFC1204M
3
For
all
European
areas
except
United
Kingdom.
Aj
QFC1205M
For
United
Kingdom.
MED
A |
QFC1203M
x
For
Asia,
Latin
America,
Middle
@
A
|
QFC1208M
x
For
Australia,
E26
QKJO407
5
For
all
European
areas.
E27
QTD1164
For
all
European
areas
and
Aus!
E28
QZE0003
Porcelain
Tube
¥For
all
European
areas.
E29
DIB
A|
QTF1054
Fuse
Holder
For
all
European
areas.
E30
WED
A |
QTF1049
”
x
For
Asia,
Latin
America,
Middle
East,
Africa
areas
and
PX.
E31
QTH1118
Heat
Sink
£32
QJT1041
Check
Pin
we
E33
BB)
QTwM0026
Rotary
Switch
Cover
a
——
¥For
all
European
areas.
E34
(FQ}QTD1129
Cord
Bushing
x
For
Asia,
Latin
America,
Middle
East,
Africa
areas
and
PX.
E35
(FQ)
|
XTN3+10B
Tapping
Screw
@3X10
x
For
Asia,
Latin
America,
Middle
East,
Africa
areas
and
PX.
E36
(DIBA
|
XTN3+16B
Tapping
Screw
®3X16
For
all
European
areas
and
Australia.
E37
XSN4+10
Screw
©4X10
E38
XSN26+8
Screw
©2.6X8
E39
XWA26B
Washer
E40
XWG26
”
XWA4B
/
NOTES:
F3
#
Fl
t+.
|
&
2.2.
het
For
all
European
areas
(T200mA)F2(T630mA)
E37
Ed)
except
United
Kingdom.
(T500mA)
--
For
United
Kingdom.
1
|
|
{
|
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I
a9
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E39(E
38:
6-4-4
|
304)
tralia.
areas.
For
Asia,
Latin
America,
Middle
East
and
Africa
+
For
Australia.
For
Asian
PX.
For
European
PX.
2
3
4
5
6
7
8
g
10
u
12
13
14
15 16
7
18
19
20
21
22
23
24
25
26
27
SCHEMATIC
DIAGRAM
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:
° = = -
=
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EQUIVA
f
|
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Q5,
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Q7,8
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Qig
1c3
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2SD636(R,
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2SD636(R,
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2SD636(R,
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2SD636H(R,
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2SD965
2SD636
2SB641
AN6552
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EQUALIZER
EQUALIZER
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LINE
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MUTE
DOLBY
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RECORD
MUTE
RECORD
GAIN
CONTROL
RECORD
AMP
LINE
MUTE
CUE/REVIEW
MUTE
CUE/REVIEW
MUTE
HEADPHONES
AMP
1C402
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Fe-Cr)
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all
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302,
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Headphones
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POWER
SWITCH
LET
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TERMINAL
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ZSDSSEH(R,
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*
For
All
European
areas.
2SD636(8;
S)
B
255V_
x
Jae)
;
[¢
|
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10
EXPLODED
VIEWS
11
MECHANI
QBP1874
DG1201
DG1202
QMB1336
QDR1139
QMF2118
QML3581
QML3583
QML3584
QML3586
QML3594
QML3603
QML3604
QML3605
QML3592
QMR1820
QMR1821
QMR1822
QMR1824
QMZ1239
QBC1357
QBT1682
QBT1894
QBN1739
QBN1742
QBN1744
QBN1745
QBN1746
QBN1747
QBS1128
QBC1372
QBW2008
M69
M83
M93
Part
Name
&
Description
Ref.
No.
ICAL
PARTS
Cassette
Pressure
Spring
Main Gear
Sub
Gear
Supply
Reel
Table
Hub
Supply
Reel
Table
Fast
Forward
Arm
Bracket
Sub
Control
Lever
Main
Control
Lever
Record
Operation
Lever
Head
Base
Plate
Lift
Lever
Auto-Stop
Release
Arm
Erase
Safety
Lever
Auto-Stop
Driving
Lever
Auto-Stop
Detection
Lever
Change
Lever
Record
Rod
Auto-Stop
Connection
Rod
Eject
Rod
Control
Rod
Flywheel
Thrust
Retainer
Lock
Pin
Pressure
Spring
Auto-Stop
Connection
Rod
Spring
Main
Lever
Spring
Selection
Lever
Spring
Pressure
Roller
Release
Spring
Sub
Gear
Spring
Main
Gear
Spring
Auto-Stop
Lever
Spring
Connection
Spring
Lock
Pin
Reel
Table
Spring
Poly
Washer
26
XUB4FT
QBW2083
QBw2012
QXL1354
QXL1355
QML3582
QBT1896
QXL1381
QBN1743
QML3588
QBN1748
QMA3861
XSN2+10
QBN1741
XWA2
QMZ1254
QXFO164
QBW2049
QBW2026
QXD1143
QXL1382
QxI0111
QBT1893
Qx10113
Qxio112
QXL1383
QMK1840
QMZ1241
QBN1740
QBC1278
QBCA0008
QML3591
QMZ1240
Part
Name
&
Description
Stop
Ring
4¢
Snap
Ring
36
Poly
Washer
Sub
Lever
Assembly
Main
Lever
Assembly
Pause
Lock
Lever
Lever
Release
Spring
Pressure
Roller
Assembly
Pressure
Roller
Spring
Fast
Forward
Lever
Fast
Forward
Spring
Flywheel
Retainer
Screw
@2x10
Change
Lever
Spring
Washer
2¢
Cord
Clamper
Flywheel
Assembly
Poly
Washer
Snap
Ring
Takeup
Ree!
Table
Assembly
Idler
Lever
Assembly
Takeup
Idler
Assembly
Takeup
Idler
Spring
Fast
Forward
Idler
Assembly
Rewind
Idler
Assembly
Fast
Forward
Arm
Assembly
Head
Base
Plate
Head
Spacer
Head
Pressure
Spring
Head
Spring
a"
Brake
Arm
Sub
Head
Base
Plate
Roller
QDK1017
QBP1873
QBT1597
QBT1892
QMA3858
QXxG1047
Qxu0170
QXK2286
QDG1199
QDG1200
QDP1823
QDB0281
QDB0273
QDB0274
QXL1360
QML3580
QBT1895
QXP0607
QMK1838
QXK2276
QDP1828
QXH0327
QXA1060
QDB0240
QMA3860
XTN3+24B
XSN26+3
XTN2+6B
XTN26+6B
XTN26+10B
XTN26+12B
XTN3+10B
ul
12
Part
Name
&
Description
Steel
Ball
26
Head
Base
Plate
Pressure
Spring
Brake
Arm
Spring
Head
Release
Spring
Head
Adjustment
Plate
Takeup
Gear
Assembly
Motor
Assembly
Sub
Chassis
Assembly
Auto-Stop
Gear
Cam
Gear
Connection
Pulley
Capstan
Belt
Fast
Forward
Belt
Takeup
Belt
Record/Playback
Selection
Arm
Assembly
Record/Playback
Selection
Lever
Record/Playback
Selection
Lever
Spring
Fast
Forward
Connection
Pulley
Assembly
_
Upper
Base
Plate
Lower
Base
Plate
Fast
Forward
Pulley
Chassis
Cover
Assembly
Tape
Counter
Counter
Belt
Counter
Angle
Tapping
Screw
@3X24
Screw
©2.6X3
Tapping
Screw
@2X6
Tapping
Screw
©2.6X6
Tapping
Screw
@2.6X10
Tapping
Screw
@2.6X12
Tapping
Screw
@3X10
14
M90
SPECIFICATIONS
Pressure
of
pressure
roller
Takeup
tension
*
Use
cassette
torque
meter
+++
QZZSRKCT
Wow
and
flutter;
(JIS)
*
Use
test
tape
+++
QZZCWAT
18
350+50g
Less
than
0.06%
(WRMS)
19
20
21
22
23
24
NOTE:
A
indicates
that
only
parts
specified
by
the
manufacturer
be
used
for
safety.
RP023A
QFTC30S011TZ
3«
For
Asia,
Latin
America,
Middle
A3
WA
A|QJP0603S
3
For
Asia,
Latin
America,
Middle
A4
|
QQT2807
Part
Name
&
Description
ACCESSORIES
Connection
Cord
Demonstration
Tape
East,
Africa
areas
and
Australia.
AC
Plug
Adaptor
East,
Africa
areas
and
Australia.
Instruction
Book
%For
all
European
areas
except
United
Kingdom.
BA
|
QQT2819
”
#For
United
Kingdom
and
Australia.
NM
|
QQT2842
x
For
Asia,
Latin
America,
Middle
HD
|
QQT2843
For
PX.
Pl
QPN4008
For
all
European
areas,
Asia,
Latin
America,
Middle
East
and
Africa
areas.
|
QPN4032
For
Australia.
QPN4014
QPA0558
QPA0559
XZB40X60A02
QPA0562
For
Australia.
P6
DBINFID
|
QPS0434
For
all
European
areas,
Australi
IN
|
QPG1994
x
For
Asia,
Latin
America,
Middle
”
East
and
Africa
areas.
"
PACKINGS
Inside
Carton
”
”
Cushion-A
Cushion-B
Poly
Bag
Spacer
Pad
ja
and
PX.
u
East
and
Africa
areas.
25
26
12
Part
Name
&
Description
al
Ball
2¢
\d
Base
Plate
Pressure
Spring
ke
Arm
Spring
)
id
Release
Spring
ad
Adjustment
Plate
ceup
Gear
Assembly
tor
Assembly
>
Chassis
Assembly
to-Stop
Gear
m
Gear
nnection
Pulley
pstan
Belt
st
Forward
Belt
keup
Belt
cord/Playback
Selection
Arm
isembly
xcord/Playback
Selection
Lever
scord/Playback
Selection
Lever
wring
ist
Forward
Connection
Pulley
ssembly
_
oper
Base
Plate
wer
Base
Plate
ist
Forward
Pulley
rassis
Cover
Assembly
ape
Counter
ounter
Belt
ounter
Angle
apping
Screw
@3X24
crew
®2.6X3
apping
Screw
@2X6
apping
Screw
2.6
X6
apping
Screw
@2.6X10
apping
Screw
2.612
‘apping
Screw
@3X10
SPECIFICATIONS
Pressure
of
pressure
roller
Takeup
tension
+
Use
cassette
torque
meter
“+
QZZSRKCT
Wow
and
flutter;
(JIS)
+
Use
test
tape
«+»
QZZCWAT
350+50g
Less
than
0.06%
(WRMS)
20
21
22
zs
44
NOTE:
A
indicates
that
only
parts
specified
by
the
manufacturer
be
used
for
safety.
Ref.
No.
Part
No.
Part
Name
&
Description
ACCESSORIES
Al
RPO23A
Connection
Cord
A2
(WA
|
QFTC30S011TZ
Demonstration
Tape
¥For
Asia,
Latin
America,
Middle
East,
Africa
areas
and
Australia.
A3
A|
QJP0603S
AC
Plug
Adaptor
¥For
Asia,
Latin
America,
Middle
East,
Africa
areas
and
Australia.
A4
QQT2807
Instruction
Book
¥For
all
European
areas
except
United
Kingdom.
A
|
QQT2819
”
¥For
United
Kingdom
and
Australia.
QQT2842
”
¥For
Asia,
Latin
America,
Middle
East
and
Africa
areas.
HD
|
QQT2843
”
For
PX.
PACKINGS
Pl
QPN4008
Inside
Carton
xFor
all
European
areas,
Asia,
Latin
America,
Middle
East
and
Africa
areas.
QPN4032
”
x
For
Australia.
QPN4014
”
QPA0558
Cushion-A
P3
QPA0559
Cushion-B
P4
XZB40X60A02
|
Poly
Bag
P5
|
QPA0562
Spacer
xFor
Australia.
P6
|
(DBF)
|
QPS0434
Pad
¥For
all
European
areas,
Australia
and
PX.
|
QPG1994
”
xFor
Asia,
Latin
America,
Middle
East
and
Africa
areas.
ZI
“vu
MECHANICAL
PARTS
LOCATION
M76
M70
M74
M73
M38
RS-M14
M89
M88&
M87
M55
M12 M85
M52
M53
M51
M14
M28
M13
M18
M23
M37
M43
M42
M56
M54
M11
M17 M22
12
13
G12
CABINET
PARTS
Gll
QYP0950
“Silver
Type”
QYP0961
“Black
Type”
QYF0442
“Silver
Type”
QYF0450
“Black
Type”
QGC1189
QKA1083
G5
QYT0586
“Silver
Type”
Part
Name
&
Description
CABINET
PARTS
Front
Panel
Assembly
u
Cassette
Lid
Assembly
”
Bottom
Cover
Rubber
Foot
Volume
Knob-A
Assembly
%For
all
European
areas,
Asia,
Latin
America,
Middle
East,
Africa
areas
and
Australia.
(A
|
QYT0595
For
PX.
QYTOS86K
“Black
Type”
QYT0587
“Silver
Type”
QYT0587K
“Black
Type”
QG01728
“Silver
Type”
QG01728K
“Black
Type”
QG01727
“Silver
Type”
QG01727K
“Black
Type”
QGT1495
“Silver
Type”
QGT1495K
“Black
Type’
QGK3044
“Silver
Type
QGK3044K
“Black
Type”
QGL1140
QGC1188
“Silver
Type’
QGC1188K
“Black
Type”
QKA1081
XTB4+10BFN
“Silver
Type”
XTB4+10BFZ
“Black
Type”
XTS3+10B
XTN3+10B
QHQ1299
QGS2796
”
”
”
”
Volume
Knob-B
Assembly
”
Push
Button
(Power
ON/OFF)
”
Push
Button
(Input
Select,
Tape
Select,
Rec
Mute)
”
Tape
Select
Knob
Tape
Select
Knob
Meter
Cover
"
Meter
Filter
Case
Cover
”
Case
Foot
Tapping
Screw
©4X10
Tapping
Screw
®4X10
Tapping
Screw
®3
X10
”
Screw
Main
Name
Plate
%For
United
Kingdom
and
Australia.
QGS2798
%
For
Asia,
Latin
America,
Middle
QGS2799
QKM1419H
“Silver
Type”
QKM1419K
“Black
Type”
QXL1363
QXL1364
QXL1365
QXL1366
QXL1367
QXL1368
QXL1369
QMN2554
QBT1597
QMR1823
QBP1875
QXA1044
QDG1102
QBW2082
QML3593
QBP1771
QBN1749
XUBSFT
QKF6015K
XTN26+6B
XTN2+6B
”
East
and
Africa
areas.
"
Main
Case
”
Eject
Button
Assembly
Record
Button
Assembly
Rewind/Review
Button
Assembly
Fast
Forward/Cue
Button
Assembly
Playback
Button
Assembly
Stop
Button
Assembly
Pause
Button
Assembly
Operation
Lever
Shaft
Obstruction
Rod
Spring
Obstruction
Rod
Operation
Lever
Spring
Operation
Button
Angle
Assembly
Holder
Gear
Snap
Ring
4¢
Lock
Arm
Holder
Spring
Eject
Spring
Stop
Ring
5¢
Cassette
Holder
Tapping
Screw
®2.6X6
Tapping
Screw
®2X6
RS-M14
FRANCAIS
|
MESURES
ET
REGLAGE
NOTA:
Pour
garder
l’appareil
en
bon
état
de
marche,
positionner
les
commuteurs
a
levier
et
les
commandes
dans
les
positions
suivantes,
sauf
indication
contraire.
e
Vérifiez
que
les
tétes
soiént
propres.
e
Sélecteur
de
Dolby:
OUT.
e
Vérifiez
que
le
cabestan
et
le
galetpres-
e
Sélecteur
de
bande:
position
normal.
sure
soient
propres.
e
Commutateur
de
test
de
créte:
LINE.
e
Température
ambiante
admissible:
e
Commande
de
niveau:
MAX.
20+5°C.
SECTION
MESURES
ET
REGLAGES
SECTION
MESURES
ET
REGLAGES
@
Réglage
de
la
position
de
la
téte
Condition:
*
Le
mode
de
lecture
et
pause
©
Azimutage
de
téte
Condition:
*
Position
lecture
Equipement:
*
Voltmétre
électronique
Oscilloscope
Bande
étalon
(azimutage)...QZZCFM
Bande
étalon
(Fenétre
de
passagede
la
band
avec
mirroir)
...QZZCRD
@
Vitesse
de
défilement
Condition:
*
Position
lecture
Equipement:
*
Compteur
électronique
numérique
ou
fréquencemétre
numérique
*
Bande
étalon...QZZCWAT
ll
y
a
une
plaque
de
réglage
de
la
téte
pour
ajuster
le
contact
de
bande
de
la
téte
en
mode
de
repérage
avant
ou
arriére.
i
2;
3.
Appuyer
sur
le
bouton
de
lecture
(PLAY)
et
le
bouton
de
pause.
Mesurer
|’espace
qui
sépare
le
galet
presseur
du
cabestan.
Valeur
standard:
0.5+0.3mm
Si
la
valeur
mesurée
se
trouve
hors
tolérances,
desserrer
la
vis
A,
et
glisser
la
plaque
de
réglage
de
la
téte
dans
la
direc-
tion
de
la
fleche
B
pour
effectuer
le
réglage.
Réglage
de
la
téte
d’enregistrement/lecture
1.
2:
3.
4.
5.
Branchez
les
appareils
comme
ci-dessous.
(Voir
Fig.
24).
Lisez
la
bande
étalon
d’azimutage
(QZZCFM,
8kHz).
Réglez
la
vis
d’orientation
(B)
Fig.
25,
de
la
téte
d’enregistre-
ment/lecture
pour
obtenir
le
niveau
maximal
a
la
sortie
LINE
OUT.
Mesurez
les
deux
canaux,
et
ajustez
les
niveaux
a
égalite
de
tension
de
sortie.
Aprés
réglage,
bloquez
la
vis
par
une
goutte
de
vernis.
Réglage
de
la
téte
d’effacement
1.
Le
branchement
de
l’équipement
d’esai
est
pareil
que
cides-
sus
mais
utiliser
le
visionneur
du
chemin
de
bande
(QZZCRD)
au
lieu
de
la
bande
d’essai
(QZZCFM).
.
Ecouter
cette
bande.
.
Régler
la
vis
(C)
montrée
a
la
Fig.
26,
de
sorte
que
la
bande
ne
se
vrille
pas,
ni
soit
déformée
par
les
guides
de
la
bande
de
la
téte
d’effacement.
.
Aprés
réglage,
bloquez
la
vis
par
une
goutte
de
vernis.
Précision
de
la
vitesse
de
défilement
{
2.
3.
4.
5.
Branchez
les
appareils
comme
ci-dessous.
(Voir
fig.
27).
Lisez
la
bande
étalon
(QZZCWAT,
3000Hz)
et
appliquez
le
signal
de
sortie
au
frequencemétre.
Mesurez
sa
fréquence.
Sur
la
base
de
3000Hz,
déteminez
la
valeur
a
|’aide
de
la
for-
mule.
f—3000
3000
avec
f
=valeur
mesurée.
Effectuez
la
mesure
sur
la
partie
médiane
de
la
bande.
Valeur
normale:
+1.5%
Précision
de
vitesse
=
x100(%)
Méthode
de
réglage
bie
Lisez
la
bande
étalon
(milieu).
2,3.
Ajustez
la
vis
de
réglage
de
vitesse
VR
indiquée
fig.
22
pour
que
la
fréquence
devienne
égale
4
3000Hz.
Eluctuations
de
vitesse
de
défilement
Faites
les
mesures
de
la
méme
facon
que
ci-dessus
(au
début,
au
milieu
et
en
fin
de
bande)
et
déterminez
la
différence
entre
les
valeurs
maximale
et
minimale,
puis
calculez
comme
suit.
iif
Fluctuations
de
vitesse
=
100(%
uations
i
3000°~
(%)
f,
=valeur
maximale
f,
=valeur
minimale
[
Valeur
normale:
monis
de
1%
Nota:
Utiliser
un
tournevis
non
métallique
pour
régler
la
vitesse
de
bande
de
cet
appareil
avec
précision.
@®
Réponse
en
fréquence
a
la
lecture
Condition:
*
Position
lecture
*
Sélecture
de
bande
..-position
Normal
Equipement:
*
Voltmétre
électronique
*
Oscilloscope
*
Bande
étalon...QZZCFM
.
Branchez
les
appareils
de
mesure
comme
pour
“l’azimutage
de
téte’’,
mais
en
utilisant
la
bande
étalon
(QZZCFM)
au
lies
de
la
bande
étalon
d’azimutage
(Voir
Fig.
24).
.
Placez
l’appareil
en
position
lecture.
.
Lisez
la
bande
étalon
de
courbe
de
réponse
(QZZCFM).
.
Mesurez
les
niveaux
de
sortie
4
315Hz,
12.5kHz,
8kHz,
4kHz,
1kHz,
250Hz,
125Hz
et
63Hz
et
comparez
chaque
niveau
de
sortie
avec
celui
de
la
fréquence
étalon
de
315Hz,
sur
la
borne
LINE
OUT.
.
Effectuez
la
mesure
sur
les
deux
canaux.
.
Vérifiez
que
les
valeurs
mesurées
se
situent
4
|’intérieur
du
gabarit
de
courbe
de
réponse.
(Voir
Fig.
28).
@
Gain
a
la
lecture
Condition:
*
Position
lecture
*
Sélecteur
de
bande
..-_position
Normal
Equipement:
*
Voltmétre
électronique
*
Oscilloscope
*
Bande
éltalon...QZZCFM
@®
Fultes
de
prémagnétisation
Condition:
*
Position
enregistrement
*
Sélecteur
de
bande
...position
Metal
*
Commande
de
niveau
...
MAX.
Equipement:
*
Voltmétre
électronique
*
Oscilloscope
©
Courant
d’effacement
Condition:
*
Position
enregistrement
*
Sélecteur
de
bande
...position
Metal
Equipement:
*
Voltmétre
électronique
*
Oscilloscope
.
Branchez
les
appareils
comme
ci-dessous.
(Voir
fig.
24).
.
Lisez
la
partie
“‘niveau
standard”
de
la
bande
étalon
(QZZCFM,
315Hz)
et
mesurez
le
niveau
de
sortie,
avec
le
voltmétre
électronique,
sur
le
jack
LINE OUT.
.
Effectuez
les
mesures
sur
les
deux
canaux.
Valeur
normale:
Autour
de
0.39V
Réglage
ie
ak
Si
la
valeur
mesurée
n’est
pas
correct,
réglez
VR1
(canal
gau-
che)
et
VR2
(droit)
(Voir
fig.
22).
Aprés
réglage,
vérifiez
4
nouveau
la
“réponse
en
fréquence
a
la
lecture”’.
.
Branchez
les
appareils
comme
ci-dessous
(Voir
Fig.
29).
.
Placez
l’appareil
en
position
enregistrement.
.
Réglez
les
bobines
de
la
trappe
L1
(canal
gauche)
et
L2
(droit)
pour
que
la
mesure
soit
au
minimum.
.
Effectuez
ce
réglage
pour
les
deux
canaux.
.
Branchez
les
appareils
comme
ci-dessous.
(Voir
fig.
30).
.
Appuyez
sur
les
boutons
d’enlegistrement
et
de
pause.
.
Place
le
selecteur
de
bande
a
la
position
‘“‘Metal’’.
.
Déterminer
le
courant
d’effacement
avec
la
formule
suivante.
5.
Ré
1.
Courant
d’effacement
(A)
__
Tension
aux
bornes
de
la
résistance
R301
(V)
1(@)
Valeur
normale:
155+15mA
(position
Metal)
Si
la
valeur
mesurée
ne
correspond
pas
a
la
norme,
réglez
de
la
maniére
suivante.
glage
Ouvrir
le
point
(A)
et
court-circuiter
le
point
(B)
sur
la
plaquette
de
circuit
principale
dans
le
schéma
de
cablage.
(Voir
page
10).
.
Mesurer
la
valeur
du
courant
d’effacement.
.
S’assurer
que
la
valeur
mesurée
se
trouve
entre
145mA
et
170mA.
.
Si
elle
se
situe
au-dela
de
la
valeur,
proéder
aux
réglages
sui-
vants.
e
Si
le
courant
d’effacement
est
inférieur
a
140mA,
courtcir-
cuiter
le
point
(A).
e
Si
le
courant
d’effacement
esi
supérieur
a
170mA,
ouvrir
le
point
(A)
et
le
point
(B).
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