Marantz 5010 User manual

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TABLE OF CONTENTS
Section Title Page
1. PW. BOARDS ...........00 0005 efike heed ss a Wai tavisthan Pa dide a Mecaueiost Pi eiade ds Gu ee rteewaut bbe Mints cae: GH a i
2. TEST EQUIPMENT REQUIRED FOR SERVICING .. 0.0... ec ee eee eee tt eee tents 1
Sy DISASSEMBLY c5: 55%, nse ase 8 tein ae nce Selena we he WE ae elec o ad Wieices pite eee ake ye be Dee scents Te 2
3.1 Removing the Cassette Case Escutcheon ...........020022eeeecee *E fenb 2oNsi Hades tat wh aD Masab cohen ane. estate ete Bae 2
3.2 Removing the MainP.W. Board... 1... 1. ee eee eee eee eee eee eee 2
3.3 Removing the Mechanical Chassis ...... TF BeG WO ead th ROW Ia Se OSE Te ANS es one NR Neon Me "hc: cebdat dal 'd Ceutws Soto: bp BGA. Na. FOr aloe 2
4. ADJUSTMENT PROCEDURES .. 0... cc en re tee ee eee ee tee ee eee tee eee eee tes 3
4.1 Mechanical Adjustments.............. oor waka Sa a Gad heme: soe Sig hat scacd feta. cehel Shiba anerodies iSndacst Hiahe: Biedeatecst ae 8 3
4.2 Electrical Adjustments and Measurements .........0.. 020 cece er euueeee 5 Aeitas le terete al aye fed Siacee ets ican eicale, 8
5. VOLTAGE CONVERSION FOR EUROPEAN MODEL ..... 1... ce et ee eee ee eet eee 21
Bi DIAGRAMS ~ 5 53532 co hs he a es ak ee ER ae ee Se 5 OS ek at aoe dak Se 2 22
G21) ‘Level Diagrain 2.62525 3-45 Sos wt Ron ied ew he a oe Ge ee en ee See ate enti Daan 22
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6.5 Pre-Amp, Power Supply, Dolby Board Schematic Diagram and Component Locations-P100 2.1... . et eee 29
6.6 LED Board Schematic Diagram and Component Locations-P600.............20-5 Migeteene a8 Bleck 09, be aes we 8 ...33
6.7. Terminals Board Schematic Diagram and Component Locations-P700............. 00. ee eee eee eee ee tee eee 33
6.8 Fuse Board Schematic Diagram and Component Locations -P400-EUROPE ............ 0.2. ee ce ee eee eee 34
7. MAJOR COMPONENT LOCATIONS... 1... cc ee eee eee eee tee eee ee eee 35
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8. EXPLODED VIEWS AND PARTS LIST..... otk SRGNG A Be we ewes a tr SAV ws PLR ase ier eaten Hare! wits tote wie a aca aia bed 36
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8.3 Associated Mechanism for Cassette Tape Operation... .. 0.0... cee ee ee ee eee ee eee teeta wens 38
8.4 Buttons for Tape Operation. ...........-. GL Anse Sa GP bres 62500: ebte tocar tebe tela sare leelac is eiceleieue ties bok cen aean St aPanee te 39
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8.6 Parts Assembled on the Top of the Chassis... 0.0... ee eee ee ee ee eee te eee eee 40
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9. GENERAL SPECIFICATIONS ©... 0.0... . eee ee ee ee eee ee eet eee ere eee ee een 51

INTRODUCTION
This service manual and prepared for use by
Authorized Warranty Station and contains ser-
vice information for Marantz Model 5010 Stereo
Cassette Deck.
Servicing information and voltage data included
in this manual are intended for use by the knowl-
edgeable and experienced technician only, All
instructions should be read carefully. No attempt
should be made to proceed without a good
understanding of the operation of the Cassette
Deck.
The parts list furnishes information by which
replacement parts may be ordered from the
Marantz Company. A simple description is in-
cluded for parts which can be usually obtained
through tocal suppliers.
1. P.W. BOARDS
As can be seen from the circuit diagram, the
chassis of Model 5010 consists of the following
units. Each unit mounted on a printed circuit
board is described within the square enclosed by
a bold dotted line on the circuit diagram.
1. Pre-Amp, Power Supply
&Dolby .... mounted on P.W. Board, P100
2. LED a5 cei 2 3 mounted on P.W, Board, P600
3. Terminals . .. mounted on P.W. Board, P700
4. Fuse (N&P versions
only) ...... mounted on P.W. Board, P400
2. TEST EQUIPMENT REQUIRED FOR
SERVICING
For measuring or checking the Model 5010,
the following instruments and materials are
necessary.
VTVM
Audio Oscillator (af OSC)
Attenuator (600 Q)
Oscilloscope
Bandpass Filter (1 kHz, 500 Hz)
IEC A-Curve Filter
Wow and Flutter Meter
Torque Meter (Cassette Type}
Digital Frequency Counter
Distortion Meter
Blank Tapes (Completely erased with bulk
eraser)
TDK AC-211 (Normal)
TDK AC-511 (CrO,)
SONY CS-30 (Fe-Cr)
NOTE: if any doubt is noted in a measured
value, use new tape.
@ Test Tapes (New Tape)
MTT-111 Wow and Flutter Tape Speed
MTT-112 Measurement of Output Level
Signal-to-Noise Ratio
MTT-150 Adjustment of Output Level
MTT-116U Frequency Response (for Normal)
MTT-116K Frequency Response (for CrO,,
Fe-Cr)
MTT-121 Cross Talk
MTT-141 Channel Separation
BIAS and EQ switches setting in accordance with
tape used are as follows:
Switch Position
BIAS Switch | EQ Switch
; i
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RRB am Pease ERE Zz.
3. DISASSEMBLY
3.1 REMOVING THE CASSETTE CASE
ESCUTCHEON
Push the cassette case escutcheon at the two
positions upward in the arrow A direction. As it
will be detached, take it out in the arrow B direc-
tion.
3.2 REMOVING THE MAIN PW. BOARD
Remove the seven screws A, B, C,D, E, F andG
holding the Main P.W. board. Unplug the con-
nector H. Then, draw it out with taking care of
not applying excessive force to any lead wire.
3.3 REMOVING THE MECHANICAL CHASSIS -
Remove the five screws A, B, C, D, and E holding
the mechanical chassis. Remove the record lever
spring assembly F, Then, draw the chassis out
with taking care of the tape counter and operat-
ing levers,

4. ADJUSTMENT PROCEDURES
4.1 MECHANICAL ADJUSTMENTS
4.1.1 Adjusting the Flywheel Thrust
Adjust the thrust screw at the flywheel bracket
until the clearance between the capstan tail end
and thrust bearing is 0.1 to 0.3mm as shown,
using a phillips screw driver. For adjusting, feel
of axial dropping of the flywheel for proper
clearance as this cannot been seen through, Then
paint the screw to lock.
4.1.2 Adjusting Pause Timing
Set the unit in the play mode of operation. Then,
adjust the bend angle of the pinch roller bracket
arm (point A in the line drawing) until the clear-
ance between the pinch roller and capstan is
0.1 to 0.3 mm at the time when the take-up reel
is stopped by slowly pressing the PAUSE push-
button down,
NOTE: To widen the clearance, make the bend
angle smaller (in the direction C). To
make the clearance narrower, widen the
bend angle (in the direction B).
4.1.3 Adjusting the Pinch Roller Pressure
Measure the pressure of the pinch roller using a
gauge as shown. For measurement, draw the
pinch roller in the arrow direction in which it is
detached from the capstan shaft and gradually
return it toward the capstan. Read the gauge at
the time when the pinch roller starts turning. The
standard pressure is 300+50g. !f the pressure is
out of the range, bend the pinch roller spring
around the point A in the direction B or C.
NOTE: To make the pressure strong, bend in
the direction B. To make the pressure
weak, bend in the direction C.

4.1.4 Adjusting the Play Timing
It is normal that when the PLAY pushbutton is
depressed, the take-up reel table turns first, then
the pinch roller is rotated. The reel table and
pinch roller must not start turning at the same
time,
NOTE: Make certain that such a subsequent
operation is made irrespective of locking
state is depressed slowly without load-
ing the tape.
(1) Checking for adjustment
Check whether or not the clearance between the
pinch roller and capstan is 0.2 to 0.5 mm when
the take-up reel table starts turning with the
PLAY pushbutton depressed slowly.
(2) Adjustment
Bend the pinch roijler bracket at the point that
touches the head chassis stopper. In the line
drawing, bending left reduces the clearance be-
tween the capstan and pinch roller.
NOTE: Make certain that the pinch roller
bracket does not leave touching the
head chassis stopper in the play mode
of operation as a result of excessive
bending.
0.2~0.5mm
CAPSTAN SHAFT
PINCH ROLLER
Seis CHASSIS STOPPER
4.1.5 Adjusting the Play Torque
Put the two pawls of the circular plate spring on
proper stepped position of the reel rest. The
adjustable torque range is 40 to 70 g-cm.
To make the torque high, put the pawls on a
shallow step. For lower torque, put them on a
deeper step.
@ Checking the take-up clutch for sliding
Make certain that the flywheel rotates freely
when the reel table is locked. The flywhee!
that revolves irregularly or stops is not accept-
able.
4.1.6 Adjusting the Fast Forward and Rewind
Torque
The fast forward and rewind idler has a torque
adjust plate spring (part A in the line drawing),
which has two pawls (part B) at its ends. Set the
pawls in proper one of the three steps. To make
the torque high, set the pawls in the shallowest
step. For lower torque, set in the deepest step.
INCREASE DECREASE
OEE
Yi,
INCREASE DECREASE
i
P22

4.1.7 Positioning the Motor Pulley
Loosen the set screw and adjust the motor pulley
position until the clearance between the pulley
and motor is 4.8mm as shown. Tighten the set
screw,
4.1.8 Adjusting the Tape Speed
Adjust the semi-fixed resistor inside the motor
until the tape speed is 2985+5Hz, using a screw
driver.
4.1.9 Adjusting the Rewind Idler Side Pressure
Make certain that in the rewind mode of opera-
tion, the rewind idler does not slip on the supply
reel table when this is held by hand. If it slips,
change the hanging position of the rewind idler
arm return spring on the chassis in the arrow
direction step by step until it does not slip.
MOTOR
PULLEY
ADJUSTING
SCREW
SPEED DOWN
at
)
SPEED UP
ARM RETURN
SPRING

&
S002
MOTOR SWITCH
BRACKET
$003 <
PAUSE MUTING \ [
SWITCH 4
$009
PLAY TIMING
SWITCH
$004 :
PLAY MINE
SWITCH S
Da
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$005
REC. MUTING
SWITCH
4.1.10 Positioning the Switches
(1) Motor switch
Turn the motor switch in the arrow direction
until it is screwed tightly. Make certain that the
contact gap is wider than 0.5 mm.
MOTOR SW
(2) Record muting switch
In the stop state, loosen the screw holding the
record muting switch and position this so that
the clearance between its end mold tip and
mounting bracket may be 6mm, Tighten the
screw, Make certain that when the record lever is
pressed in, the record muting switch contact A
is made close and the contact B is broken out
securely,
FLYWHEEL
ADJUSTING
SCREW
REC MUTING SW
(3) Pause muting switch
In the stop state, loosen the screw ‘holding the
pause muting switch and position this so that the
clearance between its end tip and pause arm may
be 1 to 1.5mm.
FLYWHEEL
\
PAUSE LEVER
(4) Start muting switch
In the stop state, loosen the screw holding the
start muting switch and position this so that its
contact clearance may be 0.5 to 0.8mm with
leaving the contact tip in contact with the head
plate, Tighten the screw.
HEAD PLATE
ADJUSTING
SCREW
Pn “TO CONTACT
0.5~0.8mm
(5) Play muting switch
In the stop state, loosen the screw holding the
play muting switch and position this so that the
clearance between its end tip and play lever may
be 4mm,
FLYWHEEL
7” PLAY MUTING SW
oe
“ADJUSTING
SCREW

4.1.11 Setting the Eject Spring
Hang the eject spring at proper one of the three
holes so that the cassette lid can be opened well.
After setting, bond the spring to lock.
EJECT SPRING
ADJUSTER —— -- | INCREASE
ROLLER
>> ADJUSTING
SCREW
4.1.12 Adjusting the Interlocking Mechanism
IMPORTANT: In aligning the mechanical assem-
bly, place it alone.
1. Lay the mechanical assembly by its side as
shown in Figure 1.
2. Loosen the screw E holding the adjuster C a
little until this moves freely.
3. Adjust the interlock cam B by finger until the
clearance between the interlock cam B and
the lock cam release arm A is 0.1 to 0.6 mm.
. Keeping this clearance, tighten the screw E to
fix the adjuster C, which will be in light con-
tact with the cassette guide shaft D.
. After completion of Steps 1 through 4, per-
form checking by proceeding as follows.
a. Open the cassette door by pressing the
STOP/EJECT pushbutton.
b. Close the cassette door slowly by hand.
Make certain that the PLAY pushbutton
will not move in the range of the position
A to B in Figure 2 while the cassette door
is closed.
NOTE: The cassette door is locked at the
position C.
CAUTION
If the PLAY pushbutton is locked in that range,
replace the following parts as these may be defec-
tive.
REF.
DESIG.
811N 438305402-0 Cam
L 438005140-0 Guide ass’y
PART NO DESCRIPTION
~O)
f
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4.2 ELECTRICAL ADJUSTMENTS AND
MEASUREMENTS
Precautions Before Adjustment and Measurement
1. Before playing the test tape back,
thoroughly demagnetize the heads, capstan
and similar metal parts using an eraser as the
test tape-recorded tone is easily erased.
2. Do not place the test tape on any measuring
instrument.
3. Do not put the test tape near a place where
the eraser is used.
4. Method of Demagnetization:—Turn the eras-
er power switch on at a remote position far
away from the heads. Bring the eraser close
to the heads, capstan and other parts to be
demagnetized, and move it up and down
four or five times to demagnetize. Slowly
separate the eraser far away from the parts,
and turn the power switch off.
5. Do not use any magnetized adjusting tool.
When using it, demagnetize it from time to
time in the course of each adjustment..
6. Do not turn semi-fixed resistor, capacitor,
and inductor adjusting screws more than
needed.
7. If measuring the tape speed wow and flutter,
operate the tape deck in the normal opera-
R210
PLAY EQ.
0204
O y205
Reh
Lch
Oslo Ou
Ova
RNO
PLAY EQ.
8.
Definitions
1.
OQu222
R2i4
PLAY LEVEL
0220
120
RIS
af PLAY LEVEL
Ovl22
R240.
REC LEVEL
R315
DOLBY
RISO
REC LEVEL
R143
- METER
ting condition. :
Do not apply locking bond excessively.
The ‘‘norma! playback state’’ is an operating
state of the tape deck which plays back the
MTT-150 test tape and is adjusted so as to
produce a 775mV output at the MAIN P.W.
Board (P100) J120, J220 with the load
assuming the measuring instrument input
impedance of greater than 100kQ2 and with
the TAPE selector switch set at the
NORMAL position.
The “‘normal recording state’’ is an operating
state of the tape deck which records a 1kHz
signal to a specified recording level for which
the recording level control is adjusted with
the 1kHz signal applied at a specified input
level to the MIC input terminal.
In the normal recording state, therefore, this
tape deck is set up with the level control to
the state that the level meter pointer may
deflect to the 100% mark as OVU with a
1kHz, 1mV input signal applied.

——
1. Head Azimuth Adjustment
SET UP
1,
Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch position::- NORMAL.
3. Load:- Measuring instrument input im-
pedance.
4. Output terminal used:- LINE OUT.
5. Test tape used:- MTT-116U (31.5Hz to
14kHz).
PROCEDURES
1. Play the 10kHz poriion of the test tape
MTT-116U back. Adjust the head azimuth
adjusting screw for maximum VTVM read.
2. (If the peak output reads of the right and left
channels are different, set the screws to
obtain the mechanical center between the
peaks.
3. After adjustment, lock the screw with bond.
Mode: play back
Tone fOKHz VTVM
lookn
CAUTION
After adjustment, repeat the playback and
stop setting a few times to make certain of
no head azimuth deviation.
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2. Tape Speed Adjustment
SET UP
1.
Power voltage:- 50 or G0Hz AC voltage rated
for the unit to be used in a market country.
2. Output terminal:- LINE OUT.
3. Test tape used:- MTT-111.
4. Unit position:- Horizontal.
PROCEDURES
1. Play the mid portion of the test tape
MTT—111 back. Adjust the tape speed
adjusting semi-fixed resistor for 2990 to
3010Hz counter indication.
Mode: playback
SPEED DOWN
Tone: 3kHz
FREQUENCY COUNTER
SPEED UP
CAUTIONS
1. For adjustment, the tape deck should be set
up in the normal operating condition.
2. Do not adjust the semi-fixed resistor more
turns than needed.
3. Do not proceed with adjustment after the
tape deck temperature has changed.
4. If a strong shock or similar vibration is
applied to the tape deck after adjustment,
make certain that the measured tape speed
had not changed.
5. If the tape speed deviation occurs, perform
the adjustment again.
6. Be careful that the counter may indicate a
wrong value because of too low counter
input level.
7. Before adjustment, allow for 30 seconds or
more after depressing of the PLAY push-
button.

3. Playback Equalizer Adjustment
SET UP
1. Power voltage:- 50 or GOHz AC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch position:- NORMAL.
3. Load:- Measuring instrument input im-
pedance.
4. output terminal:- LINE OUT.
5. Test tape used:- MTT-116U (31.5Hz to
14kHz).
PROCEDURES
| 1. Play the test tape MTT-116U. Let the 315Hz
| signal level be reference as OdB.
2. Adjust R110 and R210 (3k{2 each) for
1Q0kHz frequency response of 0 to-—1dB in
reference to the 315Hz signal level (OdB).
3. Proceed both for the right and left channels
i in the same manner.
| 4. Note that clockwise turning of R110 and
| R210 will increase the 10kHz signal output
i level.
Mode: playback
Tone: 31.5Hz— 14kHz
Line Our
R210
PLAY EQ,
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10
4, Playback Output Adjustment
SET UP
1.
100KG [a]
2 fr
Power voltage:- 50 or 6GOHz AC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch position:- NORMAL.
3. Load:- Measuring instrument input im
pedance.
4. Output terminal:- MAIN P.W. Board (P100)
J120 and J220.
5. Test tape used:- MTT-150.
PROCEDURES
1. Play the test tape MTT-150 back. Adjust
R114 and R214 (50k22 each) for 775mV
playback output level.
2. Proceed both for the right and \eft channels
in the same manner.
Mode: playback
J125, 225
R2I0
PLAY £0.
i Reta
Ox204 2) PLAY LEVEL
0.205 0.220,
Reh
Leh ‘
Quiros.” rt. Odeo
Quis Ayes
PLAY LEVEL
RIO,
PLAY €0,
CAUTION
1. This adjustment should be performed after
the one for the playback equalizer. If the
playback equalizer is adjusted after the
playback output adjustment, the playback
output should be readjusted.
are

5. VU Meter Adjustment
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch position:- NORMAL.
3. Load:- Measuring instrument input im-
pedance.
4. Output terminal used:- MAIN P.W. Board
(P100) J120 and J220.
5. Input terminal:- MIC.
PROCEDURES
1. Connect a 1kHz, —60dBV input signal to the
MIC terminal. Set up the tape deck for the
recording mode of operation.
2. Adjust the REC control for 775mV output
level at MONI. OUT of the MAIN P.W.
Board (P100) J120 and J220,
3. Adjust R143 and R243 (3kQ each) until the
VU meter pointer deflects to the DOLBY
mark (DQ) on the VU meter.
Mode: record
Tone IkHz
at Ose
nik J125. S225
(Beas:
METER 2
Over
R210 °
PLAY EQ, Be Ouzee
€ R2ia * .
‘ ( ‘ < DOLBY
* Ouezo
Rea" +
REC LEVEL,
be Ogio,
a (@ Ria °
ah LEVEL,
BND aoa
PLAYEQ! os A
6. Recording Bias Current Adjustment
(Temporal)
SET UP
1.
Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch:- NORMAL.
PROCEDURES
1.
Set up the tape deck in the recording mode
of operation, Connect the VTVM to J104,
J105 (Lch) and J204, J205 (Rech). Adjust
the semifixed resistor R156 and R256 for
3.5mV VTVM read.
Proceed both for the right and left channels
in the same manner.
For the tape deck equipped with the TAPE
selector switch, make certain that the VTVM
reads approximately 4.5mV with it set to
the CrO, position.
R210, ‘
PLAY EQ, *
ms ~ os, Al) gare?
Ousdq od SE {eye LEVEL /.,
Os205 Qve20
Lrg EE ei
_—__——t 0 yios é 14 ;
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BRAY’ EQ.
11

7. Recording Current Adjustment (Temporal)
SET UP
1.
Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. Input signal:- 1kHz, —60dB signal.
3. TAPE selector switch positions:- NORMAL,
4. Load:- Measuring instrument input im-
pedance.
PROCEDURES
1. Stop the recording bias current oscillation by
disconnecting the bias circuit +B resistor
(R305).
°
be fest ls
a ry | ee
me J
Set up the tape deck to the normal record-
ing state. Connect the VTVM to J105, J104
{L ch) and J205, J204 (R ch). Adjust the
semifixed resistors R140 and R240 until the
VTVM reads 0.35mV, respectively.
Proceed both for the right and left channels
in the same manner.
After adjustment, release the recording bias
current.
VTVM
210
BES eo
Reta’
Q s204 PLAY LeveL
O20 ovez0
Reh
Lar
Oss
Ona
Lge
Ova ae
7 ) PLAY LEVEL.
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PLAY £0,
geen ee eee ee eer eee

8. Reocrd-Playback Frequency Response Ad-
justment
SET UP
1. Power voltage:- 50 or 60Hz AC voltage
rated for the unit to be used in a market
country.
2. Input signal:- 1kHz, —60dB with —20dB
referenced as OVU.
3. TAPE selector switch:- Fe-Cr.
4. Output terminal:- LINE OUT.
5. Load:- Measuring instrument input im-
pedance.
6. Test tape used:- SONY CS-30.
PROCEDURES
1. Connect the input signal to the MIC ter-
minal. Set up the tape deck to the normal
recording state.
2. {In turn, reduce the input level by 20dB with
the use of the attenuator. Record the 1 and
10kHz tones.
3. Play the 1kHz, 20dB-down recorded tone
back as OdB. Adjust the recording bias
current until the 10kHz response is within
+1dB as referenced to the 1kHz, OdB re-
sponse,
4. Proceed both for the right and left channels
in the same manner.
5, If the recording bias current is reduced in
the above adjustment, be sure to measure
the distortion.
Mode: record
\kHz, 60dB
af OSC
Sionk Tope
attenuator
Recorded
Portion VTVM
!00KQ LZ]
im
9. Record-Playback Output Level Adjustment
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. Input:- 1kHz, —60daB signal.
3. TAPE selector switch position:- NORMAL.
4. Output terminal:- MAIN P.W. Board (P100)
J120 and J220.
5. Load:- Measuring instrument input im-
pedance.
6. Test tape used:- TDK AC-211.
PROCEDURES
1. Connect the 1kHz, —60dB input signal to
the MIC terminal. Set up the tape deck to
the normal recording state.
2. Adjust the REC LEVEL semi-fixed resistors
R140 and R240 until the recorded signal is
reproduced at 623mV +0.5cB.
CAUTION
1. If the bias current is changed, be sure to
perform the above adjustment.
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10. Adjusting the Dolby Circuit
(1) Encoder circuit
. Set the 5010 in the recording mode of
operation.
. Set the DOLBY NR switch to the OFF
position.
. Connect a 5 kHz signal to the MIC input
jack,
. Adjust the input signal level until the
output voltage at J120 or J220 is 23.5
mV,
. In that state, measure the output level at
the REC QUT jack J122 or J222 provid-
ed for the DOLBY NR switch.
. Turn the DOLBY NR switch to the ON
position.
. Adjust the LAW CONT semi-fixed resis-
tor R315 until the output level at J122 or
J222 is 8+0.25dB higher than the one
obtained in Step 5 above.
(2) Decoder circuit
1. Set the 5010 in the playback mode of
operation.
2. Set the DOLBY NR switch to the OFF
Position.
3. Connect a 5 kHz signal to J117 or J217.
4, Adjust the input signal level until the
output voltage at J200 or J220 is 59 mV.
5. Turn the DOLBY NR switch to the ON
position.
6. Make certain that the output level at
J120 or J220 is 8+0.5 dB lower than the
one obtained in Step 4 above.
CAUTIONS
1, If the output level is not in the above-men-
tioned allowable range, repeat adjustment
beginning with the encoder circuit, not from
the circuit in any case.
2. The LAW CONT semi-fixed resistor R315
serves for both right and left channles. Adjust-
ment therefore may be made either for the
right or left channel.

11. Tape Speed Measurement
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. Output terminal:- LINE OUT.
3. Test tape used:- MTT-111.
4. Set position:- Horizontal
PROCEDURES
1. Play the wound-up end of the test tape
MTT-111 back. Read the frequency counter
indication.
Mode: playback
FREQUENCY COUNTER
Tone 3kHz
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cine Out
STANDARD
Tape speed:- 4.8cm/sec +2, —2%.
Frequency: 2950 to 3050Hz.
CAUTION
The tape deck should be leveled as specified
for this measurement.
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12. Wow and Flutter Measurement
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. Output terminal:- LINE OUT.
3. Load:- Measuring instrument input im-
pedance.
4. Test tape used:- MTT-111.
5. Set position:- Horizontal.
6. Wow & flutter meter function switch: -NAB
WTD- for U and C, DIN WTD- for N,
PROCEDURES
1. Play the test tape MTT-111 back. Read the
wow & flutter meter indication.
Mode: playback
WOW @ FLUTTER METER
Tone 3kHz
STANDARD
Less than NAB WTD 0.11% in rms (for U
and C),
Less than DIN WTD 45511B4 0.16% in rms
(for N).
CAUTION
The measurement should be performed at
the wound-up end of the test tape.
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13. Playback Output Level Measurement
(at LINE OUT)
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch position: NORMAL.
3. Load:- Measuring instrument input im-
pedance.
4. Output terminal:- LINE OUT.
5. Test tape used:- MTT-112.,
PROCEDURES
1. Play the test tape back in the normal
playback state. Read the VTVM indication.
2. Proceed both for the right and left channels
in the same manner.
Mode: playback
Tone: 333 Hz
Line Our
STANDARD
Within 800mV +#3aB.
14, Playback Signal-to-Noise Ratio Measurement
SET UP
1. Power voltage:- 50 or GOHz AC voltage rated
for the unit to be used in a market country.
Load:- Measuring instrument input im-
pedance.
Measuring output terminal:- LINE OUT.
Test tape used:- MT T-112 (333Hz tone).
TAPE selector switch position:- NORMAL,
CrO, and Fe-Cr.
PROCEDURES
1. Load the test tape MTT-112. Set up the tape
deck to the normal playback state with the
use of the I.E.C. A-Curve filter.
2. Read playback output as aOdB reference.
Then playback blank tape and note the
output level drop in dB.
3. Proceed both for the right and left channels
in the same manner.
4. Repeat the above measurement for each
TAPE selector switch position.
Mode: playback
Tone 333Hz
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STANDARD
Greater than 52dB.
CAUTIONS
1. Arrange the tape deck power cord for
minimum hum component.
2. Effect by induction noises should be
minimized for the measurement.
3. When playing the standard reference {evel
tape MTJT-112 back, the VU meter indica-
tion is close to +2.5 VU and is used as the
reference level for the signal-to-noise ratio
measurement.
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15. Playback Frequency Response Measurement
SET UP
1. Power voltage:- 50 or GOHzAC voltage rated
for the unit to be used in a market country.
2. TAPE selector switch position:- NORMAL
and CrO, or Fe-Cr.
3. Load:- Measuring instrument input im-
pedance.
4. Measuring output teminal:- LINE OUT.
5. Test tape used:-
MTT-116U (for NORMAL).
MTT-116K (for CrO, or Fe-Cr).
PROCEDURES
1. Play the test tape MTT-116U and MTT-
116K back. Let the 315Hz output Seve! be
OdB as reference level,
2. Read the 40Hz and 10kHz output level
differences from the 315Hz, OdB reference
level.
3. Proceed both for the right and teft channels
in the same manner.
4. For the above measurement, use the test
tape MTT-116U for the NORMAL position
and MTT-116K for the CrO, or Fe-Cr.
Mode: playback
BISHr — 14KH2 vTVM
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Line Our
STANDARD
In reference to the 315Hz, OdB signal output
level,
40Hz-6.3kHz...... +2.5dB
6.3kHz-10kHz...... +2.5, —3dB
14kHz...... +4dB
CAUTION
Since the test tapes used may involve some
head azimuth difference, the head azimuth
should be corrected at the highest frequency
of each test tape before measurement.
16. Record-Playback Output Level Measurement
(at LINE OUT)
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. Input: 1kHz, —60dB signal.
3. Load:- Measuring instrument input im-
pedance.
4. Level control position:- SRL for recording
operation.
5. TAPE selector switch position:- NORMAL,
CrO, and Fe-Cr.
6. Measuring output terminal:- LINE OUT.
7. Cassette tape used:- TDK AC-211, AC-511
and SONY CS-30.
PROCEDURES
1. Record the 1kHz, —60dB signal in the
normal recording state.
2. Play the recorded signal back. Read the
VTVM indication.
3. Proceed for the NORMAL, CrO, and Fe-Cr
positions each in the same manner.
4. Proceed both for the right and left channels
in the same manner.
Mode: reocrd
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STANDARDS
1. NORMAL position: 430mV + 3dB.
2. CrO, position: 430mV + 3dB.
3. Fe-Cr position: 430mV + 3dB.
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17. Record-Playback, Harmonic Distortion
Measurement
SET UP
1. Power voltage:- 50 or 6OHz AC voltage rated
for the unit to be used in a market country.
2. \nput:- 1kHz, —60dB signal.
3. Playback output level:- Same as the recorded
signal level.
4. Load:- Measuring
pedance.
5. Measuring output terminal:- LINE OUT.
6. Cassette tape used:- TDK AC-211, AC-511
and SONY CS-30.
instrument input im-
PROCEDURES
1. Record the 1kHz_ signal
recording state.
2. Play the recorded signal back in the normal
playback | state. Calibrate the harmonic
distortion meter to 100% at the INPUT
CONT. Adjust the adjusting knob for
minimum meter pointer deflection, and read
the harmonic distortion.
3. Proceed both for the right and left channels
in the same manner.
4. Proceed for the NORMAL, CrO, and Fe-Cr
positions each in the same manner.
in the normal
Mode: record
Bank Tape
Mode: playback
Recorded
Postion
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Line Out
STANDARDS
1. Less than 2.5% for the NORMAL and CrQ,
positions.
2. Less than 3.5% for the Fe-Cr position.
CAUTIONS
“1. Be sure to demagnetize the heads as the
measured values may deviate from the ac-
curate values.
2. Note that excessive wow and flutter aiso
causes deviation of the measured values.
18. Record-Playback Signal-to-Noise Ratio Meas-
urement
SET UP
1. Power voltage:- 50 or GOHz AC voltage rated
for the unit to be used in a market country.
2. tnput:- 1kHz, —60dB signal.
3. Playback output level:- Same as the recorded
signal level.
4. Load:- Measuring instrument input im-
pedance.
5. Measuring output terminal:- LINE OUT.
6. Cassette tape used:- TDK AC-211, AC-511
and SONY CS-30.
PROCEDURES
1. Record the 1kHz signal in 3dB above the
normal recording state.
2. Disconnect the input signal from the micro-
phone jack. In this state, record no signal.
3. Play the 1kHz signal back in the normal
playback state with the use of the I.E.C. A-
Curve filter, Let the output level be OdB as
reference level,
4. Read difference between the recorded OdB
reference output and no-signal output levels.
5. Proceed both for the right and left channels
in the same manner.
6. Set the DOLBY switch to the ON position,
and proceed with similar measurement.
the use of the high-pass filter.
Mode: record
1kHz af OSC
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Mode: record
Blank Tape
Blank Tope
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Mode: playback
Recorded 1.E.C A-Curve VTVM
Portion (00k Filter
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cw) Line Out
STANDARDS
1. Greater than 55dB for the ON position of
the DOLBY switch.
2. Greater than 50dB for the OFF position of
the DOLBY switch.
CAUTION
Arrange the tape deck power cord for
minimum hum component.
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