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Sony TC-K570 User manual

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Photo:
TC-K677ES
SPECIFICATIONS
Recording
system
4-track
2-channel
stereo
Fast-winding
time
Approx.
90
sec.
(with
Sony
C-60
cassette)
Bias
AC
bias
Heads
Erasing
head
x
1
(S&F
head)
Recording
head
x
1
(Permalloy
head)
Playback
head
x
1
(LA
head)
Motors
Capstan
motor
x
1
(DC
servo
motor)
Reel
motor
x
1
(DC
motor)
ASIST(mechanical
drive)
motor
x
1
(DC
motor)
Signal-to-noise
ratio
(at
peak
level)
oe
ON ON
Type
lV(Sony
METAL-SLT/S)
Type
II(Sony
UX-S)
Total
harmonic
distortion
1.0%
(with
Sony
METAL-SLT/S
cassette)
Frequency
response
(DOLBY
NR
OFF)
20—21,000
Hz
(+3
dB,
IEC)
20-—16,000
Hz
[+3
dB
OVU
(-4dB)
recording]
20-19,000
Hz
(+3
dB,
IEC)
Type
IV
cassette
(Sony
METAL-SLT/S)
Type
II
cassette
(Sony
UX-S)
Type
|
cassette
|
(Sony
HF-S)
Wow
and
flutter
20—17,000
Hz
(£3
dB,IEC)
pia
+0.09%
W.Peak
(IEC)
0.05%
WRMS
(NAB)
+0.14%
W.Peak
(DIN)
Dolby
Laboratories
Licensing
Corporation.
ma}
Dolby
Laboratories
Licensing
Corporation.
“DOLBY”
and
the
double-D
symbol!
0]
are
trademarks
of
Canadian
Model
AEP
Model
UK
Model
E
Model
TC-K570
US
Model
AEP
Model
TC-K670
US
Model
Canadian
Model
UK
Model
TC-K677ES
Model
Name
Using
Similar
Mechanism
Line
inputs
Sensitivity
77.5
mV
(phono
jacks)
input
impedance
|
47
k
ohms
CD
DIRECT
INPUT!
Input
impedance
|
47k
ohms
Outputs
Tape
Transport
Mechanism
Type
Inputs
0.32
V
at
a
load
impedance
of
47
k
ohms
Over
10
k
ohms
0-1.25
mW
ata
load
impedance
of
32
ohms
Line
outputs
(phono
jacks)
Rated
output
levei
Load
impedance
Headphones
(stereo
phone
jack)
Output
level
General
Power
requirements
US,Canadian
model:
TC-K570:
120V
AC
60Hz
18W
TC-K670,
K677ES:120V
AC
60Hz
19W
AEP,
Germany
model:
220VAC~
50/60Hz
UK
model:
240VAC~50/60Hz
E
model:
120,
220,
240VAC~50/60Hz
18W
Power
consumption
19
W
Dimensions
Approx.
430
x
123
x
300
mm
(w/h/d)
(17
x
4’
x
117
inches)
including
projecting
parts
and
controls
Weight
Approx.
4.9
kg
(10
ibs
13
oz)
Supplied
accessories
Audio
connecting
cords
(2)
Design
and
specifications
subject
to
change
without
notice.
Note
This
appliance
conforms
with
EEC
Directive
87/308/EEC
regarding
interference
suppression.
STEREO
CASSETTE
DECK
ONY.
Dolby
noise
reduction
manufactured
under
license
from
TC-K570/K670/K677ES
|
SAFETY
CHECK-OUT
After
correcting
the
original
service
problem,
perform
the
following
safety
check
before
releasing
the
set
to
the
customer:
Check
the
antenna
terminals,
metal
trim,
‘‘metallized”’
knobs,
screws,
and
all
other
exposed
metal
parts
for
AC
leakage.
Check
leakage
as
described
below,
LEAKAGE
TEST
The
AC
leakage
from
any
exposed
metal
part
to
earth
ground
and
from
all
exposed
metal
parts
to
any
exposed
metal
part
having
a
return
to
chassis,
must
not
exceed
0.5mA
(S00
microampers).
Leakage
current
can
be
measured
by
any
one
of
three
methods.
1.
A
‘commercial
leakage
tester,
such
as
the
Simpson
229
or
RCA
WT-540A.
Follow
the
manufacturers’
instructions
to
use
these
instru-
ments.
2.
<A
battery-operated
AC
milliammeter.
The
Data
Precision
245
digital
multimeter
is
suitable
for
this
job.
3.
Measuring
the
voltage
drop
across
a
resistor
by
means
of
a
VOM
or
battery-operated
AC
volt-
meter.
The
“limit”
indication
is
0.75
V,
so
analog
meters
must
have
an
accurate
low-
voltage
scale.
The
Simpson
250
and
Sanwa
SH-63Trd
are
examples.of
a
passive
VOM
that
is
suilable.
Nearly
all
battery
operated
digital
multimeters
that
have
a
2V
AC
range
are
suitable.
(See
Fig.
A)
To
Expased
Metal
Parts
on
Set
AC
voltmeter
{0.75
V)
0.15
uF
a
eae
=
Earth
Ground
Fig.
A.
Using
an
AC
voltmeter
to
check
AC
leakage.
SAFETY-RELATED
COMPONENT
WARNING!!
COMPONENTS
IDENTIFIED
BY
MARK
/\
OR
DOTTED
LINE
WITH
MARK
/\
ON
THE
SCHEMATIC
DIAGRAMS
AND
IN
THE
PARTS
LIST
ARE
CRITICAL
TO
SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
PUB-
LISHED
BY
SONY.
TABLE
OF
CONTENTS
Section
Title
Page
SECTION
1.
GENERAL:
=
=
*
«©
=
=
ee
wie
Ge
xe:
ee
bat
SNS
3
SECTION
2,
DISASSEMBLY:
=
+
*
«=
=
@
8
We
a
4
SECTION
3.
PIN
DESCRIPTION
+
©
©
©
= = ©
«©
©
ww
«©
8
SECTION
4.
ADJUSTMENTS
4-{.
Mechanical
Adjustments
= ©
5
©
#2
#
©
+
Q
4-2,
Electrical
Adjustments
*
"
"°°
=
ss
=
12
SECTION
5.
DIAGRAMS
5-1,
Printed
Wiring
Boards
+
*
=
©
#
s
©
#
©
16
5-2.
Circuit
Boards
Locations
=
+
ss
ee
* &
71
5-3,
Semiconductor
Lead
Layouts"
*
"
*
+
5
=
|
5-4,
Schematic
Diagram
—Audio
Section—-
©
©
*
©
8
©
ee
ee we
22
5-5.
Schematic
Diagram
~System
Control
Section-
*
* * * *
As)
SECTION
6.
EXPLODED
VIEWS
6-1.
Chassis
Sections
*
*
*
*
* *
* #
©
#
#
«
29
6-2,
Front
Panel
Sections
=
*
* *
*
©
ee
30
6-3.
Mechanism
Section
}.5
*
« « =
eee
2
3B]
6-4.
Mechanism
Section
2.*
+ *
*
©
«©
©
«©
©
2 «
39
SECTION
7.
ELECTRICAL
PARTS
LIST:
©
=
=
©
es
©
©
« »
33
MODEL
IDENTIFICATION
—
Specification
Label
—
TC-K570
TC-K670
TC-K677ES
SONYoe
MODEL
NO.
STEREO
CASSETTE
DECK
SERIAL
No.
MADE
IN
JAPAN
US
Canadian
model:
TC-K570:
AC120V
60Hz
18W
TC-K670,
K677ES:
AC120V
6OHz
19W
AEP,
Germany
model:
AC220V~50/60Hz
UK
model:
AC240V~50/60Hz
E
model:
AC120,
220,
240V~50/60Hz
18W
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
A
LA
SECURITE!
LES
COMPOSANTS
IDENTIFIES
PAR
UNE
MARQUE
/\
SUR
LES
DIAGRAMMES
SCHEMATIQUES
ET
LA
LISTE
DES
PIECES
SONT
CRITIQUES
POUR
LA
SECURITE
DE
FONCTIONNEMENT.
NE
REMPLACER
CES
COM-
POSANTS
QUE
PAR
DES
PIECES
SONY
DONT
LES
NUMEROS
SONT
DONNES
DANS
CE
MANUEL
OU
DANS
LES
SUPPLEMENTS
PUBLIES
PAR
SONY.
SECTION
1
|
TC-K570/K670/K677
ES
G
E
N
E
RAL
This
section
is
extracted
.
from
instruction
manual.
Identification
of
Front
Panel
Parts
For
details,
refer
to
the
page
number
indicated
in
@.
[1]
POWER
switch
[2]
Cassette
holder
[3]
Counter
buttons
RESET
button
©
MEMORY
button
©
[4]
LINEAR
COUNTER
©
[5]
MEMORY
indicator
©
[6]
PEAK
LEVEL
METER
@
TAPE
TYPE
indicator
@
DISPLAY
MODE
button
@
[9]
MONITOR
button
@
MPX
FILTER
switch
@®
BALANCE
control
©
(12)
REC
(recording)
LEVEL
contro!
©
®
DOLBY
NR
(noise
reduction)
switch
@ ©
PHONE
(headphones)
LEVEL
control
@
HEADPHONES
jack
(stereo
phone
jack)
@
INPUT
selector
©
/.
*Remote
control
sensor’
REC
LEVEL
mex
Siren
mogior
.
BA
E
(o)-
-
v
a
.
CALIBRATION
rm
aateY
er
°
*%
aK
~)
@)
@
mecyent
eu
p
_,
Wehr
ir
o
y
w=
Ge)
@
®
“4
a
CT
TE
VT
[17]
REC
(recording)
LEVEL
control
for
calibration
®
BIAS
contro!
®
Tape
operation
buttons
<4
(rewind)
button
>
(fast-forward)
button
@
(stop)
button
B>
(play)
button
IE
PAUSE
button
O
REC
MUTE
(record
muting)
button
®
@
REC
(recording)
button
20|
&
OPEN/CLOSE
button
21]
TIMER
switch
®
*Remote
control
sensor
You
can
remotely
control
this
cassette
deck
with:
-—-
A
remote
commander
that
came
with
a
Sony
amplifier
or
receiver
if
it
has
the
fal
mark
and
cassette
deck
control
capability.
—
An
optional
Sony
remote
commander
with
the
lal
mark
and
cassette
deck
control
capability.
TC-K570/K670/K677ES
|
—
SECTION
2
DISASSEMBLY
Note:
Follow
the
disassembly
procedure
in
the
numerical
order
given.
MECHANISM
BLOCK
Oscrews
(M3
x
8)
Oscrews(M3
x
8)
oN,
on
t
(
tk
L
.
UF
;
SX
@+
BVIT3
x6
@+BVTP3x8
|
CASSETTE
HOLDER
@fush
lever
(lifter)
in
the
direction
of
arrow
and
remove
cassette
holder.
AE
A.
CGAL
27S
@cassette
lid
Otension
spring
ORNAMENTAL
PLATE
CAPSTAN
MOTOR/FLYWHEEL
(TC-K570)
@
Push
lever
(lifter)
in
the
direction
of
arrow
and
remove
ornamental
plate.
@Oscrews
Hook
belt
here
temporarily
when
~~,
reassembling.
Sa
Spacer
t
Py
+
PTPWH2
x
25
¢
@ornamental
plate
@flywheel
P)
a7
se
ee
@Qbracket(thrust
retainer
R)
OW
O+87P2.6x5
CAPSTAN
MOTOR/FLYWHEEL
(TC-K670/K677ES)
PINCH
LEVER
(TC-K570)
®
\
x6
@washer—____
cS
Olever(FR)
@washer
eae
:
/
a
PAO
:
a
a
®+PS3x6
Obelt(capstam
V4)
@release
claw
Q
@
+
PTPWH2
25
Olever(pinch)
PINCH
LEVER
i
(TC-K670/K677ES)
\
C
:
.
Vi
7
@lever(pinch
T)
(jo
@capstan
motor
Qwasher
eS
0O+PS3x6
@bracket
|
V.
Olever(pinch
S)
(thrust
retainer
V4)
ee
ee
@lever
(PS)
COR
ie
om
a>
|
TC-K570/K670/K677ES
REEL
AND
ASSIST
MOTORS
@+8B7TP2x
18
O+8B7P2x18
‘o
E
g
H
@bracket(motor
R)
ass‘’y
Align
boss
of
mode
cam
to
the
point
when
reassembling.
“bai
Ca
boss
\
a
-
of
PAA
Z
mode
cam
LY,
FL
selection
lever
mode
cam
Hook
belt
here
Align
the
line
on
mode
cam
to
temporarily
when
the
tip
of
selection
lever.
reassembling.
+B2.6X6.5
@assist
motor
Spacer(mot
e
gion
‘bracket(motor
R)
ass’y.
Oree/
motor
board
@ree/
motor
TC-K570/K670/K677ES
SECTION
3
PIN
DESCRIPTION
©1C701
M50941-483SP(MICRO
COMPUTER)
The
M50941-483SP
function
are-described
below.
[rine
[178
[rt
1
|
Vrer
Internal
A/D
port
reference
voltage
input.
2
KEY
7
Key
input
port.
OV
=
OPEN/CLOSE,
1V
=
STOP,
2V
=
REW,
3V
=
FF,
4V
=
REC.
3
KEY
6
I
key
input
port.
OV
=
PLAY,
IV
=
PAUSE,
2V
=
REC
MUTE.
.
4
KEY
5
I
Key
input
port.
OV
=
RESET,
1V
=
MEMORY,
2V
=
DISPLAY
MODE,
3V
=
MONITOR.
5
METER-L
|
Signal
input
for
level
meter-L.
6
METER-R
I
Signal
input
for
level
meter-R.
7
TIMER
I
Timer
REC/PLAY
switch
input.
OV
=
TIMER
REC,
1V
=
TIMER
PLAY,
2V
=
OFF.
8
T.
PULSE
I
Take-up
reel
base
sensor
input.
9
S.
PULSE
I
Supply
reel
base
sensor
input.
10
AMS.
SIG
I
AMS
signal
input.
No
song
detected
=
Low.
Song
detected
=
High.
1]
BIAS
0
Bias
oscillation
on
and
off
control.
12
MO3V
0
Motor
speed
control.
STOP/PLAY
=
Low,
FF/REW
=
High.
18
M04,
5V
0
Motor
speed
control.
STOP/PLAY
=
High,
FF/REW
=
Low.
14
MO-FWD
0
Reel
motor
rotates.
15
MO-REV
0
Reel
motor
rotates
in
reverse.
16
MO-DOWN
0
Head
base
DOWN
output
of
the
mechanical
block.
17
MO-UP
0
Head
base
UP
output
of
the
mechanical
block.
18
HALF-SW
I
HALF
switch
input
of
the
mechanical
block.
19
REC-SW
I
REC
switch
input
of
the
mechanical
block.
20
DOOR-SW
I
DOOR
switch
input
of
the
mechanical
block.
21
CLOSE-SW
I
CLOSE
switch
input
of
the
mechanical
block.
22
OPEN-SW
I
OPEN
switch
input
of
the
mechanical
block.
23
POWER-OUT
0
“Low”
for
power
off
procedure
after
POWER
switch
is
turned
off.
24
POWER-IN
I
Power
(AC)
off
detection.
25
|
Remote
control
signal
input.
26
oe
GND
27
I
System
reset
input.
28
I
Clock
input
(4.
19MHz).
29
0
Clock
output.
30
_
Not
used.
31
zc
Not
used.
32
Ves
=
GND
33
Not
used.
34°
|
PATS
I
| |
Rotary
encoder
input
to
detect
the
position
of
the
head
base
of
the
mechanical
block.
37
PATO
I
38
ZV
=
Power
supply
for
driving
the
fluorescent
indicator
tube.
39
FL~p
0
|
|
|
Segment
data
output
for
the
fluorescent
indicator
tube
FL751.
54
FL-a
0
55
FL-G5
0
| | |
Common
data
output
for
the
fluorescent
indicator
tube
FL751.
59
FL-G1
0
60
MONI
TOR
0
Source
monitor
control.
Low
=
TAPE,
High
=
SOURCE.
61
REC-MUTE
0
REC
MUTE
control.
Low
=
MUTE.
62
LINE-MUTE
0
LINE
MUTE
control.
Low
=
MUTE.
63
AVec
i
Analog
power
supply(+5V).
64
Vec
=
Power
supply(+5V).
SECTION
4
ADJUSTMENTS
1.
MECHANICAL
ADJUSTMENTS
PRECAUTION
Adjustment
Position:
As
seen
from
the
cassette,
side
(top)
and
MD
as
seen
1.
Clean
the
following
parts
with
a
denatured-alcohol-moistened
swab:
TC-KB70/KB77ES
record/playback
head
pinch
roller
head
on
(bottom).
erase
head
rubber
belts
capstan
idler
2.
Demagnetize
the
record/playback
head
with
a
head
demagnerizer.
3.
Do
not
use
a
magnetized
screwdriver
for
the
adjustments.
4.
After
the
adjustments,
apply
suitable
locking
compound
to
the
parts
adjusted.
Tape
Path
Adjustment
Note:
When
using
the
adjustment
methods
for
other
than
replacement
reasons,
please
do
not
tamper
unnecessarily
with
the
adjustment
screws
or
the
erasehead
because
either
the
Supply
pinch
Takeup
pinch
supply
pinch
roller
guide
or
the
record/
roller
Erasehead
Record/playback
roller
playback
head
will
be
made
the
standard
tape
head
paths.
Moreover,
when
it
is
necessary
to
adjust
and
replace
two
or
more
of
any
of
the
heads
and/or
pinch
rollers,
replace
them
one
TC-K570
by
one,
completely
taking
out
the
first
tape
path,
and
then
replacing
the
second
one.
(TC-K670/K677ES)
Preparation
:
1.
Mirror
cassette
CQO09C
8-909~708-01
(or
CQO012C
8-909-708-02)
If
one
does
not
have
this,
cut
out
the
sections
of
a
120-minute
cassette
shell
as
indicated
below
head
@
and
use
that
cassette.
Record/playback
Takeup
pinch
head
roller
Definition
of
Terms:
The
figures
are
of
a
record/
playback
head.
Height
Declination
Depth
Azimuth
Cut
out
2.
Phillips
screwdriver
(medium-size)
:
For
the
head
adjustment
screws
Blade-type
screwdriver
(large-size)
:
For
the
supply
pinch
roller
adjustment
screws
3.
Pen
light
4,
WS-48B
(3
kHz,
0
dB)
5.
P-4-A100
(10
kHz,-10
dB)
Adjustment
Method
:
Supply
Pinch
Roller!
:
Note:
Only
perform
this
adjustment
when
the
supply
TC-K670/K877ES
pinch
roller
is
to
be
replaced.
Insert
the
mirror
cassette
and
put
the
unit
in
record/playback
mode.
Check
to
see
whether
the
tape
is
curling
at
the
record/playback
head
guide
or
the
pinch
roller
guide.
If
it
is
curling,
remove
the
curl
by
adjusting
the
®
tape
curl
adjustment
screw.
Then,
check
that
the
tape
is
running
past
the
middle
of
the
erasehead.
Record/
playback
Head
Note:
Only
perfom
this
adjustment
when
the
record
/playback
head
is
to
be
replaced.
Insert
the
mirror
cassette
and
put
the
unit
in
record/
playback
mode.
(Height
Adjustment)
Check
to
see
if
the
tape
is
curling
at
the
tape
guide
of
the
head.
If
it
is
curling,
tighten
screws
@,
©,
and
@,
respectively
by
the
same
angle,
moving
the
head
so
that
it
remains
at
the
same
angle
throughout
the
procedure.
If
it
curls
on
the
bottom
side
of
the
mirror
cassette
(actually
the
inner
side),
tighten
all
the
screws
equally;
but
loosen
them
if
the
tape
begins
to
curl
on
the
top
side
(outer
side).
ane
=
,
Outside
normal
Curling
on
the
Curling
on
the
(record/playback
head
inner
side.
outer
side.
as
seen
from
the
side
Tighten
screws
Loosen
screws
of
the
erasehead.)
4,
©,
and
@.
@,®,
and
@.
(Declination
Adjustment)
While
in
the
record/
playback
position,
set
the
back
tension
to
0
(wind
the
supply
reel
with
something
thin
like
a
pencil
in
a
counterclockwise
direction)
and
make
sure
there
is
no
curling
or
shifting
(shifting
up/
shifting
down)
at
the
guide
of
the
record/
playback
head.
Because
shifting
can
only
occur
due
to
a
difference
in
the
width
of
the
tape
and
that
of
the
tape
guides
(curling
will
otherwise
occur),
it
is
necessary
to
pay
close
attention
since
it
can
be
easily
overlooked.
When
there
is
a
shift,
tighten
screws
©
and
@
equally
and
change
the
declination
of
the
head.
If
the
tape
is
shifting
up,
tighten
the
screws,
and
if
it
is
shifting
down,
loosen
them.
Repeat
the
adjustments
in
steps
2
and
3
and
fine
adjust
the
height
and
the
declination.
(Preliminary
Azimuth
Adjustment)
After
demagnetizing
and
cleaning
the
adjustment
head,
play
back
WS-48B
(3
kHz,
0
dB).
Turn
screw
@
so
that
the
reading
on
the
level
meter
of
the
unit
or
that
of
the
level
meter
connected
to
LINE
OUT
is
maximized.
If
the
screw
is
turned
at
least
half
a
revolution,
repeat
the
adjustments
from
step
1.
(Tape
Path
Check)
Connect
the
oscilloscope
to
LINE
OUT
and
play
back
P~4-A100
(10
kHz,
-10
dB)
to
display
a
resurge
waveform.
After
20
seconds
of
record/playback
(after
the
tension
within
the
loop
has
been
increased
sufficiently),
make
sure
the
variation
in
the
resurge
is
within
+
90
degrees
(within
+45
degrees
is
desired).
If
the
variation
is
greater
than
this,
it
is
because
the
declination
and/or
the
height
adjustment
is
not
perfect.
Repeat
the
adjustments
from
step
1.
test
tape
P-4-160
(10
kHz,
~10
dB)
Oscilloscope
L-CH 47kQ
LINE
CUT
Oscilloscope
Resurge
Waveform
OOAOOQV®
In
Phase
45°
cases
180°
SRL).
coli
en
Good
ae
a
>
TC-K670/K677ES
Note:
Only
perform
this
adjustment
when
the
erasehead
is
to
be
replaced.
Insert
the
mirror
cassette
and
put
the
unit
in
record/
playback
mode.
(Azimuth
Adjustment)
Adjust
the
azimuth
of
the
erasehead
by
adjusting
screws
@
and
@
so
that
the
tape
runs
as
evenly
as
possible.
pe
tor
TT
Tighten
@
Tighten
@
Loosen
@
Loosen
@
(The
erasehead
as
seen
when
erasing
the
mirror
cassette.)
Normal
(Height
adjustment)
Turn
screws
®,@,
and
@
all
by
the
same
angle
so
that
the
portions
of
the
erasehead
visible
at
top
and
bottom
are
nearly
of
equal
width.
If
the
width
at
the
top
is
greater,
tighten
the
screws;
if
the
width
at
the
bottom
is
greater,
loosen
the
screws.
Erasehead
(The
erasehead
as
seen
through
the
mirror
cassette.)
4.
Tape
—»
a
Cay
Make
these
the
same
width.
(Declination
Adjustment)
Leaving
it
in
the
playback
position,
put
the
back
tension
to
0
and
make
certain
the
erasehead
part
and
supply
pinch
roller
guide
part
do
not
shift.
If
there
is
a
shift,
turn
the
screw
®
and
change
the
declination.
Looking
at
it
using
the
mirror
cassette,
if
the
tape
shifts
up,
tighten
the
screw,
and
if
it
shifts
down,
loosen
the
screw.
Repeat
the
adjustments
beginning
with
step
2
and
fine
adjust
the
height
and
declination.
And
make
sure
the
tape
does
not
curl
up
on
the
pinch
roller
guide
or
the
guide
part
of
the
record/playback
head.
(Depth
Adjustment)
In
order
to
make
the
entire
head
play
the
tape
smoothly,
and
to
make
sure
the
depth
of
the
erasehead
is
neither
too
shallow
nor
too
deep,
loosen
screw
@
a
bit,
About
0.56
mm
ae
_}
T
I
oa
Normal
Erasehead
~~
|
Record/
playback
“fT
|
7
>
head
Not
deep
enough
Too
deep
Check
1.
Check
to
make
sure
that
there
are
no
curls
or
shifts
throughout
the
whole
tape
path
and
that
the
tape
runs
smoothly.
2.
Reapply
the
locking
compound
to
the
adjusted
screws.
(The
locking
compound
should
only
be
applied
to
screw
©
after
the
azimuth
has
been
adjusted.)
TORQUE
MEASUREMENT
Torque
Torque
meter
C
Q-102C
‘28-60
g-
cm(0,
39-0.
83
02
+
inch)
FWD
CQ-102C
TC-K570:1-5
g
+
cm(0.
014-0.
069
oz
+
inch)
Back
tension
|
Yo-ro/eorrs:7-1
g
+
cm(0.
097-0.
15
0z
*
inch)
PF,
REW|
CQ-201B
|
85-90
g
+
cm(0,
9-1.
25
02
«
inch)
Meter
reading
Pinch
Rolier
Pressing
Force
Measurement
Mode
:
playback
Hook
needle
of
the
tension
gauge
to
the
pinch
roller
shaft
and
push
back
pinch
roller
to
detach
it
from
capstan.
Then,
return
it
gradually
to
capstan
and
read
the
gauge
when
the
pinch
roller
begins
turnning.
Standard
Limits
:
Tape-up
side
.
TC-K570
:
210-320
g(7.
4-11.3
02)
TC-K670/K677ES
:
270-350
g(9.
5-120
02)
Supply
side
TC-K670/K677ES
:
180-280
g(6.
4-9.9
oz)
capstan
pinch
roller
tension
gauge
2.
ELECTRICAL
ADJUSTMENT
Note:
The
adjustment
should
be
performed
in
the
order
given
in
the
service
manual.
As
a
rule,
adjustments
about
playback
should
be
performed
before
those
about
recording.
The
adjustments
should
be
performed
before:
for
both
L-CH
and
R-CH.
*
Switches
and
controls
shoud
be
set
as
follows
unless
otherwise
specified.
DOLBY
NR
switch:
OFF
MPX
FILTER
switch:
OFF
MONITOR
switch:
Tape
*
Standard
Record:
Deliver
the
standard
input
signal
level
to
the
input
jack
and
set
the
REC
LEVEL
control
to
obtain
the
standard
output
signal
level.
~
Record
Mode
—
AF
OSC
LINE
OUT
LINE
IN
Standard
Input
Level
LINE
IN|
source
impedance
10kQ
___
input
level
0.25
V
(-
10
dB)
|
Standard
Output
Level
LINE
OUT
[toad
impedance
|_—a7EQ
adv
(=
5B)
Test
Tape
|_P-4-A100
|
10
kHz,
~104B
|
Azimth
Adjustment
_|
PB
Level
Adjusumet
WS-48B
Tape
Speed
Adjustment
Test
Mode
This
set
will
get
into
test
mode
by
shorting
the
pins
of
CNE707
(TEST)
on
MA
I
N(A)
board
before
turning
the
power
on.
Record/Playback
Head
Azimuth
Adjustment
Porcedure:
1.
Mode:
FWD
playback
Tast
jee
P-4-A100
(10
kHz,
~
10
dB)
VTVM
LINE
OUT
2.
Turn
the
adjustment
screw
for
the
maximum
output
levels.
If
these
levels
do
not
match,
turn
the
adjustment
screw
until
both
of
output
levels
match
together
within
|
dB.
within
L-CH
peak
within
1
dB
Da
R-CH
ie
peak
crew
,
am
—
position
angle
L-CH
peak
R-CH
peak
3.
Phase
Check
Mode:
playback
test
tape
P-4-A100
(10
kHz,
—
10
dB)
L-CH
A7kQ4
oscilloscope
LINE
OUT
Screen
pattern
in
phase
45°
90°
135°
180°
bo
nmnnmne
aamenncentll
Good
Wrong
4.
After
the
adjustment,
lock
the
screws
with
locking
compound.
Adjustment
Location:
Record/Playback
head
TC-K570
TC-K670/K677ES
Adjustment
screw
Adjustment
screw