Teac C-3X User manual

TEAC,
SERVICE MANUAL
C-3X
Stereo Cassette Deck

3X
1
SPECIFICATIONS
AND
SERVICE
DATA
NOTES:
1.
Improvements
may
result
in
changes
in
specifications
and
service
data.
2.
04B
is
referenced
to
0.775
V
in
this
manual
unless
otherwise
specified.
3.
All
the
electrical
numeral
values
are
for
STANDARD
speed
unless otherwise specified.
SPECIFICATIONS
Track System 4-track, 2-channel stereo
Heads 3: Erase, record and playback
Type
of
Tape
Cassette
tape,
C-60
and
C-90
(Philips
type)
Tape
Speed
4.75
cm/s
(1-7/8
ips),
9.5
cm/s
(3-3/4
ips)
Input (level and impedance)
MIC:
Specified
input
level:
—57
dB
(1.09
mV)/10k
ohms
Minimum input level: —67 dB (346 nV)
LINE
IN:
Specified
input
level:
—9
dB
(275
mV)/50k
ohms
Minimum input level: -19 dB (86.9 mV)
Output (level and impedance)
OUTPUT:
Maximum
output
level:
2.5
dB
(581
mV)/S0k
ohms
Specified output level: —5 dB (436 mV)
PHONES:
Specified
output
level:
-15.8
dB
(126
mV)/8
ohms
Equalization
HIGH STANDARD
METAL
3180
us
+35
us
3180
us
+
70
ps
Co(CrO2)
3180
us
+
35
us
3180
us
+
70
us
NORMAL
|
3180
us+
50
us
3180
us
+
120
us
Head Configuration
1/2-track, 1-channel erase head
1/4-track,
2-channel
record
head
and
playback
head
in
a
single
housing
Motors 1 DC servo capstan motor
1 DC reel motor
Bias Frequency 100 kHz +5 kHz
Operation Position Horizontal
Power Requirements
100/117/220/240
V
AC,
50/60
Hz,
41
W(General
export
model)
117
V
AC,
60
Hz,
41
W(U.S.A/Canada
model)
220
V
AC,
50
Hz,
41
W(Europe
model)
240
V
AC,
50
Hz,41
W(U.K./Australia
model)
Weight 9 kg (19-3/16 Ibs.) net
Dimensions See Fig. 3-2
Noise
Reduction
System
and
Headroom
Extension
System
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
“Dolby’
and
the
double-D
symbol
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.
SERVICE DATA
MECHANICAL
Tape Speed Deviation 3,000 Hz +45 Hz
Tape Speed Drift 30 Hz
Wow and Flutter
HIGH STANDARD
Playback 0.065% (WRMS) 0.08% (WRMs)
Record/playback | 0.18% (RMS) 0.25% (RMS)
Pinch
Roller
Pressure
390
g
to
490
g
(13.8
oz
to
17.3
02.)
Reel
Torque
(at
STANDARD
speed)
Take-up:
45
to
65
g-cm
(0.625
to
0.903
oz-inch)
Supply:
3
to
8
g-cm
(0.0417
to
0.111
oz-inch)
F.F.&
REW:
90
to
160
g-cm
(1.25
to
2.22
oz-inch)
Fast
Winding
Time
90
seconds
for
MTT-501
(C-60)
ELECTRICAL
Frequency Response
See Figs. 5-9 to 5-13.
Signal-to-noise Ratio
Playback
Better
than:
HIGH
STANDARD
METAL,
Co(CrO,)
55
dB
52dB
NORMAL
53
dB 48
dB
Overall
Better
than:
HIGH
STANDARD
METAL,
Co(Cr0.)
49
dB
48
dB
NORMAL
46
dB
45
dB
S/N
is
improved
by
5
dB
at
1
kHz
and
10
dB
above
5
kHz
when
Dolby
NR*
is
used.
Erase
Efficiency
65
dB
min.
at
1
kHz
(measured
with
input
10
dB
higher
than
the
specified
input
level)
Channel
Separation
35 dB
min.
at
1
kHz
Adjacent
Track
Crosstalk
40
dB
min.
at
125
Hz
Total
Harmonic
Distortion
2.0%
or
less
with
NORMAL,
Co(Cr02)
and METAL tapes
ldbx
noise
reduction
system
made
under
license
from
dbx,
Incorpo-
rated,
The
word
dbx’
and
the
Symbol
are
trademarks
of
dbx,
incorporated.
CAUTION
must
always
be
replaced
with
identical
components
-
refer
to
the
TEAC
Parts
List
and
ensure
exact
replacement.
AsParts
marked
with
this
sign
are
safety
critical
components.
They}

2 PARTS LOCATION
POWER REC/PLAY
TRANSFORMER AMPL, PCB ASSY
JOINT PCB ‘A
REEL
MOTOR
CAPSTAN
MOTOR
LEVER
SWITCH
PCB
ASSY
Fig. 2-1
SUPPLY TAKE-UP COUNTER REECMOTOR
REEL TABLE REEL TABLE
ERASE HEAD
TENSION ARM PINCH ROLLER
REC/PLAY HEAD CASSETTE HOLDER CAPSTAN MOTOR
FAST FORWARD SOLENOID
HEAD BASE SOLENOID
PINCH ROLLER SOLENOID
Fig, 2-2 Fig. 2-3

LIMITED AREA
3
REMOVAL
OF
EXTERNAL
COMPONENTS
Disassemble
in
number-order
Fig. 3-2 Dimensions
C-3X
sil
aires
Fig. 3-1

recess
4 MECHANICAL ADJUSTMENTS AND CHECKS
Note: All checks and adjustments are made with the SPEED switch
set to STANDARD, unless otherwise indicated.
4-1 REEL TORQUE 4-3 HEAD BASE PLATE POSITIONING
1. Load the cassette torque meter on the deck and read the pointer
indication on the dial scale for each tape transport operation.
The measured torque should be within the following values:
Take-up: 45 to 65 g-cm (0.62 to 0.90 oz-inch)
Supply: 3 to 8 g-cm (0.042 to 0.11 oz-inch)
F.F.and REW: 90 to 160 g-cm (1.25 to 2.22 oz-inch)
4-2 PINCH ROLLER PRESSURE
1, With the cassette holder shut and no tape loaded, put the deck in
PLAY mode.
2. Hook a spring scale on the top of the pinch roller assembly plate,
as shown in the illustration,
3. Pull the scale down until there is sufficient force to separate the
pinch roller from the capstan shaft,
4. Ease pressure until the pinch roller makes just enough contact
with the capstan shaft so that the pinch roller just begins to turn.
At this point, note the reading an the scale. It should be from
390 g to 490 g (13.8 oz. to 17.3 02.)
|. If the pressure is not within the prescribed specifications, it may
be adjusted by first removing the pinch roller spring from the
pinch roller assembly and then bending the spring as shown in
the illustration.
a
stronger
stronger
weaker
Fig. 4-1
1, Set the deck in the PLAY mode.
2. Push the head base plate by hand in the direction of the arrow
and check that the head base plate and the stopper portion of
‘the mechanism chassis make contact.
3. If there is any clearance, loosen the two screws on the head base
plate solenoid and reposition the solenoid until the clearance is
eliminated.
Head base plate
ot
Stopper portion of
There
should
be
mechanical
no
clearance
at
chassis
this
point,
Push by hand 1-1884-1
when in PLAY mode Peers
Fig. 4-2
Screws
Head Base
Solenoid
Fig. 4-3 Head base solenoid location
4-4 CAPSTAN ASSEMBLY THRUST
1, Turn the thrust adjusting screw so that thrust of the. capstan
shaft is within 0.05 mm to 0.15 mm.
Thrust play
0.05 mm to 0.15 mm
Thrust
adjusting
screw
Flywheel
Fig. 4-4

4-5 TAPE SPEED
STANDARD speed
1.
Connect
a
frequency
counter
to
the
deck
as
shown
in
Fig.
4-5.
2.
Play
a
tape
for
about
five
minutes
to
warm
up
the
deck,
then
load
a
TEAC
MTT-111
test
tape
containing
a
3000-Hz
test
tone
and
play
the
test
tape
from
the
beginning.
3.
While
the
tape
is
playing,
use
a
common
slotted
screwdriver
with
the
handle
completely
insulated
from
the
blade,
and
adjust
the
control
on
the
MOTOR
PCB
(as
far
as
possible)
for
a
reading
of
3000
Hz
(Spec.
3000
Hz
+5
Hz)
on
the
frequency
counter.
4,
Play
the
tape
at
the
beginning
and
at
the
end,
and
check
that
the
speed
deviation
is
within
the
prescribed
limits
by
observing
that
the
reading
on
the
frequency
counter
never
deviates
more
than
+45
Hz
from
3000
Hz,
nor
drifts
more
than
30
Hz
at
any
given
time.
HIGH speed
5.
Set
the
deck
to
HIGH
speed
and
follow
all
the
procedures
described
above.
Since
the
speed
is
doubled,
all
the
values
described
in
the
preceding
steps
are
also
doubled
to
be
com-
patible.
6.
If
the
tape
speed
is
not
within
the
prescribed
specifications,
check
the
pinch
roller
pressure
and
the
tape
transport
mechan-
ism
for
any
abnormality,
and
make
sure
the
tape
path
is
clean.
Frequency Counter
—
g 00
Oscillator
Wow &
Flutter Meter
DECK
(under TEST{—
TAY
LINE IN
Q0°
JURY
ouTPUT
Fig. 45
Fig. 4-6 Tape speed adjustment location
4-6 WOW AND FLUTTER
Note: These measurements should be made at the beginning, middle,
and the end of the tape.
1) PLAYBACK
STANDARD Speed
1.
Connect
a
wow-and-flutter
meter
to
the
deck
as
shown
in
Fig.
4-5.
2. Load and play a TEAC MTT-111 test tape.
3.
Check
that
the
reading
on
the
wow-and-flutter
meter
is
within
0.08%
(WRMS).
2) SIMULTANEOUS RECORD/PLAYBACK METHOD
STANDARD Speed
4.
Load
a
TEAC
MTT-501
test
tape
(blank)
and
record
a
3000-Hz
signal.
5. With the MONITOR switch in the TAPE position, note the read-
ing on the wow-and-flutter meter, it should not be more than
0.25% (RMS).
HIGH Speed
6. Repeat the above procedures with the deck set to HIGH speed.
The wow and flutter should not be more than 0.18% (RMS).
3)
NON-SIMULTANEOUS
RECORD/PLAYBACK
METHOD
STANDARD Speed
7.
Rewind
the
tape
to
the
beginning
of
the
recorded
section
pre-
viously
made
in
step
4,
and
play
it
at
STANDARD
speed.
8. The wow and flutter should not be more than 0.25% (RMS). ~
HIGH Speed
9.
Rewind
the
tape
to
the
beginning
of
the
portion
previously
recorded
in
and
play
it
at
HIGH
speed.
The
wow
and
flutter
should
not
be
more
than
0.18%
(RMS).
4-7
MICROSWITCH
(A)
ASSEMBLY
CLEARANCE
1.
Insert
a
blank
cassette
and
close
the
cassette
holder.
2. Loosen the two screws on the microswitch (A).
3.
Move
the
switch
so
that
actuator
of
the
switch
contracts
the
safety
lever.
4.
Adjust
the
switch
position
to
obtain
a
clearance
of
between
0.1
mm
to
0.3
mm.
5. Retighten the screws.

Safety lever
Blank cassette
T1856
0.1 mm to 0.3 mm clearance
Actuator
ale
Safety lever Bent tip of
switch bracket
Fig. 4.7
4-8 MICROSWITCH (B) ASSEMBLY CLEARANCE
1. Push the EJECT button to open the cassette holder.
2, Loosen the two screws on the microswitch (B),
3. Move the switch so that switch actuator contacts the bent pro-
jecting portion of the eject lever.
4. Adjust the switch position to obtain a clearance of approximate-
ly 1mm.
5, Retighten the screws,
Clearance of
‘approx. 1 mm|
Switch Housing
Fig. 4-8
4-9 LUBRICATION
Lubrication is only required when parts are replaced. For this pur-
pose, use the oil and grease specified below.
Oil: TEAC spindle oil (from TEAC TZ-255 oil kit), Mobil
D.T.E. Oil Light, or equivalent
Grease: ORE-LUBE G1/3 or equivalent
1. Apply a drop of oil with an oil applicator to a point about 1/3
the way down the shaft (from the free end) of the flywheel, then
insert the shaft into the capstan housing.
2. Apply a suitable amount of light grease to the well of the fly-
wheel bearing.
Capstan Flywheel Assy
Well of
Flywheel Bearing
Capstan Shaft
Apply a drop of oil here.
Capstan Housing
Fig. 4.9
4-10 VOLTAGE SELECTION
(FOR GENERAL EXPORT MODELS)
1. Always disconnect the power line cord before making these
adjustments.
2. Remove the top cover of the deck by removing the screws from
the sides.
3. Locate the voltage selector, shown in the illustration (in front of
the power transformer).
4. Loosen the two screws in the shorting bar and move the bar so
that it jumpers the opposing terminals marked with the required
voltage (100, 117, 220 or 240).
5. Retighten the screws and replace the top cover.
4-11 AC POWER LINE FREQUENCY
Since the C-3X uses a DC servo motor, 50 Hz or 60 Hz operation is
permitted without any change in power line frequency.
Shorting Bar
Fig. 4-10

|
oa
4
|
5
ELECTRICAL
ADJUSTMENTS
AND
CHECKS
PRECAUTIONS
1. Before beginning any checks or adjustments, clean and demag-
netize the entire tape path.
2. Make sure the deck is properly set for the voltage in your
locality.
3. In general, adjustments and checks are done in the order of L-ch
then R-ch. Double REF. NOs. and test point designations indi-
cate L-ch/R-ch.
(Example: R11/R21)
4. For this deck, 0 dB is referenced to 0.775 V. If you are using an
AC voltmeter which references 0 dB to 1V, appropriate com-
pensation should be made.
5, The AC voltmeter used in the procedures must have an input
impedance of 1M ohms or more.
6. Note the “Deck settings” at the top of each chart. These settings
must be used for all the checks in each chart unless explicitly
stated otherwise.
—70 dB or more .. . What does it mean?
In reference to some specifications, you may come across an expres-
sion like: “—70 dB or more”. This means that the lower the value
of this specification, the greater the absolute value of the specifica-
tion and the better the performance of the deck. For instance, a
noise floor of —76 dB is better than —70 dB, because this means
that the level of noise is lower. So in this case, “—70 dB or more”
means at least as good a value as —70 dB and maybe even better,
ie., -71 dB,
OSCILLOSCOPE
OSCILLATOR oistoRTION ANALYZER
amp SPKR
=r
AC Voltmeter
4kHz FILTER
ATTENUATOR si
DECK c
L
a %
errs tJ under TEST |=
LINE IN
rrr
OUTPUT
Fig. 5-1 Basic test setup
OSCILLOSCOPE
AMP SPKR
1
DECK
under TEST
L A=
}__] 0°
AC Voltmeter.
OUTPUT 1-83
Fig. 5-2 Test setup for azimuth check
REC-PLAY Head
Height/Tilt
Adjusting Screw
Azimuth
Adjusting
Nut
T-1769
Fig. 5-3 Azimuth adj, nut location

Deck settings: TEAC test tapes:
MONITOR sw.: TAPE MTT-150: For Dolby level calibration
NR SYSTEM sw.: OUT MTT-316: For playback frequency response
SPEED sw.: STANDARD check for METAL, Co(Cr0,)
5-1 PLAYBACK PERFORMANCE EQ sw.: METAL MTT-216: For playback response check for NORMAL
MEASURING
ADJUST —_|POINT:
ITEM SETTING INPUT SIGNAL, (or CHECK) REMARKS
RESULT
Conn.: Fig. 5-2 OUTPUT:
1,
REC/PLAY
head
Azimuth
nut
of
|
@
Phase:
about
0°
azimuth OUTPUT cont.: convenient MTT-316 (12.5 kHz) R-P heads ‘on ‘scope (Fig. 5-4)
output level position (Fig, 5-3) Max. output on
OUTPUT: |
Phase: 45° min.
2. Phase shift Same as above MTT-316 Check (315 Hz)
90° min.
(12.5 kHz)
- - TP1/TP2
MTT-150 R11/R21 2.5 dB (581 mV)
Spec. setting of
OUTPUT: OUTPUT cont.
3. Specified output zs MTT-180. OUTPUT cont, 1° 5 dB (436 mV) |e Spec. output
level
PEAK LEVEL meter
level
4, PEAK LEVEL meter - MTT-150 RIZ/R22 eA
EQ: METAL, Co(CrO,)
Adjust for 10 kHz to-be the output:
same level as ref. signal MTT-316 R10/R20 Fig. 5-9
(315 Hz)
5. Frequency response | ~~ - ----~~~~----4~-----------}-------- -- =
OUTPUT: At 10 kHz,
, should be 3 dB to 6 d8|
EQ: NORMAL MTT-316 Check higher than measured
in above step.
SPEED: STANDARD and __| Fully-erased tape: OUTPUT:
HIGH (Use bulk tape eraser) {82.48 min. ist0)] Ratio of spec.
6. Signal-to-noise ratio |EQ: METAL . . METAL . fe 55 dB min. (HI) output of
Co(CrO) . .MTT-5061 Check 48 dB min. (STD)| —5 dB to noise
NORMAL )IMTT-501 = 53 aB min, (Ht)
PHONES:
7. Headphone output | conn: Fig, 5-5 MTT-150 Check ~15.8 dB 43 dB 8 ohm load
(89.0 mV to 178 mV)
AC Voltmeter
f=}
0° (IN PHASE) 45° g0° 180°
Fig. 5-4 Confirming phase relationship
DECK under TEST
PHONES
one
Fig. 5-5 Test setup for headphone check

Deck setting:
REC-PAUSE mode
MONITOR sw.: SOURCE
NR SYSTEM sw.: OUT
|
INPUT
sw.:
LINE
5-2
MONITOR
PERFORMANCE
QUTPUT
cont.:
Specified
position
(item
3)
ly
MEASURING
ADJusT | POINT:
ITem
SETTING
INPUT
SIGNAL
iaonek
REMARKS
RESULT
:
Mic:
OUTPUT:
ie
Se
oe
ee
ice
400
Hz/-67
dB
Check
—5 dB
43
dB
MIG
rain:
Ineut
1
(346
uv)
(308
mV
to
615
mV)
8.
Min.
input
level
isioreeccd
irene
INPUT
sw.:
LINE
400
Hz/—19
dB
Check
—5
dB
43
dB
nee
(86.9
mv)
(308
mV
to
615
mv)|
'"P'
‘i
LINE
IN:
Specified
set-
:
RECORD
cont,
|
OUTPUT:
F
-
400
Hz/—9
dB
3
ting
of
RE-
(6
(LR)
—5
dB
(436
mV)
ee,
2,
EINE
epeeiteed.npatt
LINE
IN:
DOLBY
TP
(TP1/TP2);
=
400
Hz/-9
dB
Check
-2.5d8
£0.5dB
(275
mV)
(648
mV
t0
615
mV)
ge ECORD or OUTPUT controls,
after establishing their setting as ab
i
LINE
IN:
:
:
10.
PEAK
LEVEL
PEAK
LEVEL
meter:
i
=
400
Hz/—9
dB
Check
i
:
meter
400
He
dB
#1
dB
:
LINE
IN:
‘
a.
;
11,
“TEST
IN”
INPUT
sw.:
TEST
400
Hz/—29
4B
Check
atl
i
(27.5
mV)
L
>
U
Deck
settings:
:
MONITOR
sw.:
TAPE
}
NR
SYSTEM
sw.:
OUT
INPUT sw.: LINE
SPEED sw.: STANDARD TEAC test tapes:
ADJUST/PRE-SET
sw.:
PRE-SET
MTT-5061:
For
record
test
with
Co(Cr0.)
OUTPUT
cont.:
Specified
position
(item
3)
|
MTT-501:
For
record
test
with
NORMAL
5-3
RECORDING
PERFORMANCE
RECORD
cont.(L/R):
Specified
position
(item
9)
METAL:
For
record
test
with
METAL
MEASURING
ADJUST | POINT:
ITEM
SETTING
INPUT
SIGNAL
a
eneeK)
REMARKS.
RESULT
NEN:
BIAS
TRAP
TP
12.
BIAS
trap
Record-pause
mode
Ae
nek
L104/L.204
(TP3/TP4):
a
Min.
reading
LINE IN:
OUTPUT:
BIAS, EQ: METAL “AOOHz & 10 kHz
Tape:
METAL
alternately/—42aB
|
R18/R25
Neatly.
eciuel
eve
eienvl
at
both
frequencies
Hl LINE IN
i
:
:
ouTPuT:
:
13,
Record
bias
BIAS,
EQ:
Co(CrO9)
400
Hz
&
10
kHz
|
Tape!
MTT-5061
alternately/—42.aB
|
R14/R24
Nesrlv.caual
level
eee
at
both
frequencies
Gee
ER
ROSES
TNEINGA
ket
Woe
wc
oe
ourTPUT:
BIAS, EQ: NORMAL 400 Hz & 10 kHz i
Tape:
MTT-501
alternately/—42.dB
|
R13/R23
Nearly
cate
level
LL
(6.15
mv)
at
both
frequencies
1
J

MEASURING
ApJust | POINT:
ITEM SETTING INPUT SIGNAL ieee REMARKS
RESULT
LINE IN:
BIAS, EQ: METAL OUTPUT:
Tape: METAL perepetirad Rie/A26 8 dB (308 mV}
LINE IN
BIAS, EQ: Co(Cr0.) OUTPUT:
14, Record level Pee MELeDOT a0 He/-12 48 R17/R27 Be AB aOR TV)
LINE IN:
BIAS, EQ: NORMAL OUTPUT:
Tape: MTT-501 (po Het 12 OB Rig/n2e —8 dB (308 mv)
cn "Required signal/ Check QUTRUT:
BIAS, EQ: METAL Be ee te Fig. 5-10
LINE IN:
BIAS, EQ: Co(CrO2) IN ouTPUT:
15, Frequency 7 Required signal/ Check a
response Tepe: MIT-S08? —42 dB (6.15 mV) Fig. 6:10
LINE IN
: NORMAL INE ouTPUT:
aera Required signal/ Check Feeaa
—42 dB (6.15 mV)
If frequency response is out of specification, reche ck #13, “Record bias”.
16. Total harmonic _| Same as above, but with LINEN side aa ouTPuT:
distortion STANDARD tape only percent 2% or less distortion
SPEED:
STANDARDand
[UNE
IN
augur
HIGH ix
: (275 mv) Check 48 dB min. (STD)
BIAS, EQ: METAL 1 49 dB min. (HI)
Tape: METAL Ac ser
17. Signal-to-noise y 1 kHz/—9 dB OUTPUT: Ratio of spec-
ratio trina eee tee (275 mv) Check 48 dB min. (STD) | ified output of
if 4 49 dB min. (HI) 5 dB to noise
no signal
‘ 1 kHz/—9 dB output:
Pee MEE (275 mv) Check 45 dB min. (STD)
7 + 46 dB min. (HI)
no signal
© Connection is same as in Fig. 5-1, but engage 1-kHz filter.
© Record a 1-kHz signal. Rewind tape to midpoint of recorded portion.
Record a ‘no signal” portion, Find the difference between the 1-kHz portion
and the “no-signal’’ portion.
18, Erase efficiency TINEING
BIAS, EQ: METAL eee eke ourTpur: Ret output
Tape: METAL . +: 65 dB min. ratio 45 dB (1.38V)
no signal
Connection: Fig, 5-1, but engage 1-kHz filter.
Record a 1-kHz signal, Push REC MUTE button for several seconds. Rewind
and play the tape. Find the difference between the 1-kHz portion and the
“no-signal” portion.
19, REC MUTE
function LINE IN:
BIAS, EQ: Co(CrO,) a Ghedie OUTPUT: Ret: cutout
Tape: MTT-506! baa 65 dB min. ratio eee i aavy
no signal
20. Channel separation
filter.
Connection: Fig. 5-1, but do not connect LINE IN (R), and engage 1
Set the deck to record mode. Find the difference between the 1-kHz
recorded portion (L-ch) and the “no signal’ portion (R-ch).
“kHz
BIAS, EQ: Co(CrO2)
‘Tape: MTT-5061
LINE IN:
Lich 1 kHz/-9 dB
(275 mV)
Rech No signal
Check
OUTPUT:
35 dB min. ratio
C-3X.
1

MEASURING
ADJUST POINT:
ITEM
SETTING
INPUT
SIGNAL
(or
CHECK)
REMARKS
RESULT
Connection:
Fig.
5-1,
but
do
not
connect
LINE
IN
(L)
and
OUTPUT
(L).
Record a 125-Hz signal on R-ch and note output level. Invert tape
and
play
R-ch
track,
Check
leakage
level
against
the
output
reference
of previously recorded portion.
21. Adjacent track
crosstalk
LINE
IN;
BIAS,
EQ:
Co(CrO)
L-ch
No
signal
Check
OUTPUT:
Tape:
MTT-5061
Rech
125
Hz/-9
dB
a
40
dB
min.
ratio
(275
mV)
mt
‘@
Record
a
1-kHz
signal
with
NR
SYSTEM
switch
OUT.
Play
this
portion
with
NR
SYSTEM
switch
set
to
OUT
and
set
to
NR.
Obtain
the
difference
in
output
level
between
OUT
and
NR
positions.
Repeat
the
above
process
using
a
10-kHz
signal.
22.
DOLBY
NR
effect
’
LINE
IN:
OUTPUT:
nt
£O:
ColcrOa)
1
kHz/—29
dB
Check
Variation
Pee
(27.5
mv)
3
dB
to
8
dB
|
LINE
IN
OUTPUT:
BIAS:
.
2:
GolCrO2)
10
kHz/—39
dB
Check
Variation
5
(8.69
mv)
8dB
to
12dB
BIAS,
EQ:
NORMAL
LINE
IN:
,
(1)
|Tape:
MTT-501
Required
signal/
Check
On
ee
NR SYSTEM: NR —42 dB (6.15 mV)
EIN EIN R36 (for L-and |OUTPUT:
Rechannels) Fig. 5-12
(2)
||
NR
SYSTEM:
NR
+
HX
Required
signal/
42
dB
(6.15
mv)
TIWEIN OUTPUT:
23.
DolbyHX
—
(3).
||
NR
SYSTEM:
NR
+
HX
Required
signal/
Check
Re
Baa.
effect
=12
dB
(195
mV)
eee
LINE
IN:
:
INE:
At
10
kHz
to
12.5
kHz,
Ay
ay
NE
SYSTEM
OU
Required
signal/
ee
should
be
lower
than
12
dB
(195
mV)
measured
in
step
(3)
to)
[Ras
Eas
colcro2)
Repeat
steps
(1)
to
(4),
but
substitute
R37
for
R36.
BIAS,
EQ:
Co(CrO,)
R35/R45
trim-pot:
fully
CCW
(7
}
Tape:
MTT-5061
F30/R40
trim-pot:
fully
CW
(>)
INPUT:
TEST
i
ADJUST/PRE-SET
sw.:
ADJUST
i
Record-pause
mode
SE
Loe
as
RECORD
cont’s
|
OUTPUT:
fal
MONITOR
sw.:
SOURCE
|
[fev
(LIR)
=25
dB
(43.6
mV)
1
LINE
IN:
-
|
Record-pause
mode
PEAK
LEVEL
meter:
1
kHz/—29
dB
Check
erp
!
MONITOR
sw.:
SOURCE
(27.5
mV)
Record-play
mode
St
eae
OUTPUT
level
between
the
setting
where
|
R35/R45
24,
BIAS/REC
MONITOR
sw.:
TAPE
breay)
amaximum
output
value
is
obtained
and
|
Yetajis
"ns
CALIBRATION
’
when
the
trim-pot
is
set
fully
clockwise
=a
(on
front
panel)
is
more
than
4
dB.
su
‘Set
R35/R45
in
the
position
correspond-
LINE
IN:
ing
to
maximum
output
value.
Check
that,|
R30/R40
TY
er
Ape
1
kHz/—29
dB
When
F30/R40
is
rotated
from
fully
CW
|
variable
range
e
(27.5
mv)
position
to
fully
CCW
position,
OUTPUT
|
checks
level
is
reduced
by
more
than
10
dB.
ri
oureur;
OS™
LINE
IN:
,
Record-play
mode
Equal
level
with
MONITOR'sw.:
TAPE
soo
Hel
ee
R30/R40
MONITOR
switch,
SOURCE
;
TAPE
and
SOURCE
LINE |
OUTPUT:
Record-play mode 400 Hz/—29 dB
YMONITOR
sw.:
TAPE
6.3
kHz/—29
dB
R3s/R45
tee
level
betwen
12.5 kHz/—29 dB 7
12

5-4
ADJUSTMENT
AND
TEST
POINT
LOCATIONS
1.
(ie
SYSTEM:
NR
(St
SYSTEM:
NR+HX
‘SPEED:
STANDARD
SPEED:
STANDARD
using
Co(Cr02)
SPEED:
STANDARD
HIGH
or
NORMAL
tape
&
METAL,
Co(CrO2)
¢
:
NORMAL,
(eis
ae
METAL
/EQ,
BIAS:
Co(CrO2)
(EQ,
BIAS:
NORMAL
Tape:
MTT-316
Tape:
MTT-216
Tape:
METAL
(Fepue
MTT-5061
(robe:
MTT-501
FeSpoNsE 1
35 ee 38 0 a AF ese ay a
een Fmcauene wv
Fig.
5-9
Playback
frequency
response
Fig.
5-12
Overall
frequency
response
(Dolby IN)
NR SYSTEM: NR+HX
SPEED:
STANDARD
SPEED:
STANDARD
(————)
HIGH
uated
|
EQ,
BIAS:
Co(CrO)
EQ,
BIAS:
NORMAL.
(Ge
BIAS:
METAL
EQ,
BIAS:
Co(CrO2)
Tape:
MTT-5061
(Tepe:
MTT-501
\Tape:
METAL
Tape:
MTT-5061
Input
level:
—12
dB
(3
dB
lower
than
specified
level
of
-9
dB)
Fig. 5-6
ies
cn
R10/R20
Playback
EQ
Pacer
unc
R11/R21
Playback
level
FP
TE
aes
aad
=
AE
eauhy
wi
wanes
R12/R22
PEAR
TEVEL
mater
Fig.
5-10
Overall
frequency
response
Fig.
5-13
Dolby
HX
effect
R13/R23
Record
bias
(NORMAL)
[METAL,
Co(Cr0)]
R14/R24
Record
bias
[Co(CrO)]
R15/R25
Record
bias
(METAL)
R16/R26
Record
level
(METAL)
R17/R27
Record
level
[Co(Cr0,)] SPEED:
STANDARD
(
R18/R28
Record
level
(NORMAL)
HIGH
a
a=
R30/R40
Record
level
(coarse-adjusted
ee
MAL
Fig,
8-7
for
general
setting)
R35/R45
Record bias
(coarse-adjusted
for general setting)
R36
DOLBY
HX
effect
(NORMAL)
R37
DOLBY
HX
effect
[Co(Cr0.)]
L104/L204
Bias
trap
3s OS 205 ry OB
FREQUENCY
IN
He
Fig. 5-11 Overall frequency response
[NORMAL]
R35 R45 R30 R40
Fig.
5-8
13
14

|
3x
3X
ASSEMBLING
HARDWARE
CODING
LIST
6
EXPLODED
VIEWS
AND
PARTS
LIST
EXPLODED
VIEW
-1
All
screws
conform
to
ISO’standards,
and
have
crossrecessed
heads,
unless
otherwise
noted.
2-Round
Washer
Head
1SO
screws
have
the
head
inscribed
with
a
point
as
in
the
figure
to
the
right.
Max6
(BLK
Ni)
Qe
2-Fiber
Washer
CS
9 4x B15x10.5(BLK)
FOR
EXAMPLE:
7
Peery
-
i
Length
in
mm
(L)
L L
Diameter
in
mm
(D)
*
M3x8(BLK_
Ni)
We
x@6H105
Metric
System
Nomenclature
loL
pk
*
Inner
dia.
for
washers
and
nuts
Name
MACHINE
‘SCREW
R
Round
Head
Screw
|
(Jami
P
Pan
Head
Sorew
[3
mn)
Stove
Head
Screw
-
Cross)
|
QD
Binding
Head
Screw
Name
TAPPING
Binding
Head
BTA
|Tapping
Screw(A
Type)
A
Ont
QO,
®
Rens
!o-Round
Washer
Hood
axe
(BLK
Ni)
|
Binding Head
BTB
{Tapping
Screw(B
Type)
Round.
Head
RTA
=
|Tapping
Screw(A
Type:
Round Head
RTB
|
Tapping
Sorew(B
Type)
Flat
Countersunk
Head Screw
Hex
Socket
SETSODEW
SF
Setscrew(
Flat
Point)
Oval
Countersunk
Head Screw
Hex Sooket
SC
|
setscrew(Cup
Point)
Round Head
Wood Screw
Slotted
Sooket
SS
|Setsorew(Flat
Point)
TAPTITE
PTT
Pan
Head
E-Ring
SCREW
Taptite
Screw
WASHER
E
(Retaining
Washer)
Washer Head
Taptite
Screw
w
Fiat
Washer
(Plain)
Binding Head
SEMS
Screw(A
Type)}
Look
Washer
(
Spring)
Binding Head
SEMS
Screw(B
Type)
Binding
Head
SEMS
Screw(F
Type)
©)
Lock
Washer
(internal
Teeth)
3B
MBx6(NI)
Lock
Washer
EWE
(External
Teeth)
Pan Head
SEMS
Screw(A
Type)
O}up
Pan
Head
=
SEMS
Screw(B
Type)
Trim
Washer
(Countersunk)
Hex
Nut
a
Uno
16

Parts marked with *require longer delivery time than regualr parts.
EXPLODED
VIEW
-1
INCLUDED
ACCESSORIES
REF.NO. PARTSNO. DESCRIPTION REF.NO. PARTSNO. DESCRIPTION
1
-
1
*5800060300
Cover,
Top
[All
except
L]
5128065000
Cord
Assy,
1
-
2.
*5122168000
Connector,
Socket;
6P
Input-output
Connection
1
-
3
*5122165000
Connector,
Socket;
3P
5101345000
Information
Supplement,
Cassette
1 - 4 — *5122166000 Connector, Socket: 4P
1 - 5 *5122172000 Connector, Socket; 10P 5101495000 _ Information Supplement, Cassette
[Atl except U]
1 - 6 "5122167000 Connector, Socket; 5P
1 - 7 — *5800059400 Bracket, Handle; L [All except L] 5740005000 Plate Assy, Side; B [All except L]
1 += 8 *5800083400 Escutcheon Assy, Cassette 5544995000 Washer x 4 [All except L]
1 - 9 *5122174000 Connector, Socekt; 12P 5534659000 Sapcer x 4 [All except L]
1-10 *5785603025 Spacer 5780215015 Screw, M5 x 15 (Ni) x4
[All except L]
1-11 5504712000 Knob Assy, TIMER 5564682000 Seal, MEMORY [All except L]
1-12 *5640007300 Panel Assy, Front
1-13 5543027100 Knob, VR 5700007200 C-3X Owner's Manual [U]
: 1-14 5534521000 Knob, Lever Switch 5700007300 C-3X Owner's Manual
i 1-18 *5552340201 Chassis, Rear [All except L] [all except U}
*5502229001 Chassis Assy, Rear [L]
1-16 *5504676000 Foot [All except L]
1-17 — *5800059500 Bracket, Handle; R [All except L]
1-18 *5800064800 Cabinet Assy [L]
1-19 | *5555526000 Washer [L]
1-20 *5800060400 Cover, Top; Shield [L]
1-21 *5800059800 Sash, Side; L [L]
1-22 *5800059900 Sash, 7 RL]
1-23 5138009000 Key Unit
1 [phone] Cover Assy, Cassette
|
|
(U]:
U.S.A,
[C]:
CANADA
[GE]:
GENERAL
EXPORT
(Al:
AUSTRALIA
[E]:
EUROPE
(UK]:
U.K.
[L]: LIMITED AREA
3X
7

¢-3X
nN
= a S i) w a
=)
a a bo if]
18

EXPLODED VIEW -2
Parts marked with *require longer delivery time than regualr parts.
REF.NO. PARTSNO. DESCRIPTION
rae ae | “5553285000 Holder, Cassette
2 + 2 *5544958000 Shaft, Lock Plate
2-3 *5534612000 Plate, Lock
2-4 *5534613000 Guide, Cassette; L
eB. *5555655000 Plate, Cassette Holder
2-6 *5534615000 Spring, Cassette Pressure
es *5555582000 Tape, Adhesive
2-8 *5534638000 Lens, Lamp
2-9 5534844000 Shoe, Brake
2-10 *5520333000 Spring, Brake
2-11 *5504669002 Plate Assy, Brake; B
2 -12 *5210010200 PCB, LAMP [U]
*5210022400 PCB, LAMP [All except U]
2 -13 5142026000 Lamp, DC 6V 65mA
2-14 “5544656000 Shaft, Lever
2-15 *5555544000 Lever, Record Preventing; D
2 -16 *5524197000 Spring, Lever
2-17 *5555535000 Bracket, Counter Assy
2 -18 5504660001 Counter Assy
2-19 5534617000 Belt, Counter
2 -20 *5534448000 Mounting Rubber
+ as *5200018410 PCB Assy, REED SW [Allexcept U]
"5200018400 PCB Assy, REED SW [U]
Pee 2 *5534444200 Guide, Cassette
2-23 5524201000 Spring, Eject Arm
2 -24 5555551000 Arm, Eject
2 26 *5800090600 Holder Assy, Switch
2 -26 *5800098500 Cushion, Reel
2-27 *5555552000 Arm, Eject Actuating
2 -28 5800063800 Pulley Assy, Reel; R
2 -29 *5581055000 Screw, Shoulder
2 -30 5800063700 Pulley Assy, Reel; L
2 -31 *5555549000 Arm, Eject Preventing
So 282 *5524200000 = Spring, Arm
2 -33 *5534606000 Arm, Pinch Roller
2 -34 5504828001 Arm Assy, Pinch Roller
2 -35 *5800060100 Chassis Assy, Mechanism
2 -36 *5524285000 Spring, Pinch Roller
2 -37 *5555531000 Plate, Head Base; B
2 -38 *5555530000 Plate, Head Base; A
2 -39 *5504717000 Plate Assy, Head Base
2 -40 *5581062000 Clamper, Cord; E
2-4 5540055000 Steel Ball, $2
2 -42 *5555533000 Plate, Pressure
2 -43 5800064400 Spacer, Erase Head
2 -44 5569613000 Head, Erase
2 -45 5524141000 Spring, Height Adj.
2 -46 *5524208000 Spring, Tension
2 -47 *5533174000 Arm, Tension
2 -48 5540056000 Steel Ball, $3.
2 -49 5800063300 Table Assy, Reel; R
2 -50 5800063200 Table Assy, Reel; L
2 -51 5534683100 Guide, Cassette; L
2 -52 *5504716000 Plate Assy, Head Mounting
2 -53 *5555658000 Plate, Tension Adj.
2 -54 5569606100 Head, REC-PLAY
2 -55 5534614000 Guide, Cassette; R
2 -56 *5504714000 Bracket Assy, Holder; L
2 -57 *6504715000 Bracket Assy, Holder; R
2 -58 5524202000 Spring, Holder
USA. [c]:
[A]: AUSTRALIA (El:
(Ll: LIMITED AREA
CANADA
EUROPE
[GE]:
[UK]:
GENERAL EXPORT
U.K.
19

EXPLODED VIEW - 3
' 20

EXPLODED VIEW -3
Parts marked with *require longer delivery time than regualr parts.
REF.NO. PARTSNO. DESCRIPTION
3 - 1. *5504673000 Holder Assy, Damper; C
t eo 5 *5555555000 Bracket, Damper
3-3 5370000600 Motor Assy, Capstan; DC
3 - 4 *5800064600 Plate, Flywheel Base
3-5 *5534277000 Bearing, Flywheel
3-6 *5200014100 PCB Assy, JOINT [U]
*6200014110 PCB Assy, JOINT [All except U}
CBee 5504757000 Flywheel Assy, Capstan
3-8 5163040000 Solenoid, B
3-9 5163039100 Solenoid, A
3-10 5313000500 Solenoid
3-11 *5555546000 Arm, Pressure; B
3 -12 *5581038000 Clamper, Cord;A
3 -13 *5800062600 Lever, Actuating
3-14 *5524195000 Spring, Lever
3 -15 *5504666000 Lever Assy, Pause Actuating
3 -16 *5534611000 Arm, Pause Actuating
3-17 *5800061900 Arm Assy, Actuating
3-18 *5504665000 Lever Assy, Actuating
3-19 *5524213000 Spring, Actuating; A
3 -20 *5800065500 Bracket Assy, Solenoid; B
3-21 *5555543000 Bracket, Switch
3 -22 5130003000 Switch, Micro
3 -23 *5534610000 Arm, Base Actuating
3-24 *5800062700 Spring, Pulley Guide
3-25 *5800062900 Plate, Pulley Guide
3 -26 *5504667000 Lever Assy, Pause
3-27 *5524203000 Spring, Damper
3 -28 *5788202100 String, Damper
3 -29 *5555556000 Angle, Spring
3 -30 *5800060100 Chassis Assy, Mechanism
3-31 *5800062300 Bracket, Switch
3 -32 *5800062800 Spring, Cassette Pressure
3 -33 *5800061600 Arm, Cassette Pressure
3-34 *5504670000 _Lever Assy, Eject
3 -35 *5524199000 Spring, Eject
3 -36 *5800063000 Guide, Actuating Bar
3-37 *5800062500 Bar, Brake Actuating
3 -38 *5534130000 Washer, Oil Retaining
3 -39 *5504091000 Housing Assy, Capstan
3 -40 *5550031000 Washer Thrust
3-41 5504808000 Pulley Assy, Fast Wind
3 -42 *6524274000 Spring, Arm
3 -43 5800063100 Belt, Capstan Drive
3-44 5800062400 Pulley, Motor
3-45 *5504807001 Plate Assy, Motor
3 -46 7105135000 Motor Assy, Reel; DC
3-47 *5534537000 Collar, Rubber
[U]: U.S.A. [c]:
{A]: AUSTRALIA [El]:
(L]: LIMITED AREA
CANADA
EUROPE
[GE]:
[UK]:
GENERAL EXPORT
U.K.
21

EXPLODED VIEW -4
S2-W B 45x B 10x10.2