Grundig MAJESTIC TK83O User manual

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GENERAL I NFORMATION
Grundig Majestic ModelsTK830, TK830E, and TK830U taperecorders canrecord andplay
back on l/ 4" tape. The two-track systemis employed so that thefull length of tapemay beused
twice. The recorders can record and play back in both directions.
Tape speeds are 1 l/ 2 and 3 3/ 4 ips, giving a playback time of approximately one hour for
standardtape at 7 L/ 2 ips and two hours at 3 3/ 4 ips. Electromagnetic changeover from Track I
to Track II takes approximately 1. 5 seconds at 'l i/ 2 ips and less than one second at 3 3/ 4 ips;
thus, virtuallycontinuous track-to-trackrecording canbe made. Threetypes of high-impedance
input connections with push-button selection are avallable.
Two recordingand twoerasing headsare used, offset forthe respectiveTrack I and Track
II positions. The Trick button (Loudspeaker/ Eraser Cut-out button), together with the Temp-
orary Stop/Safety button and Recording button depressed, enables a second recording to be
superimposed upon a previous recording.
Supplied by:
Majestic I nternational Sales Corporation
743 West La Salle Street
Chicago 10, lllinois
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GRUNDIG MAJESTIC MODEI.S
TK83O. TK83OE. TK83OU
This moferiol compiled and pvblished by
HOWARD lA/. SAfrrS & CO., INC., INDIANAPOtIS 6, INDIANA
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Copyright 1959 . All Rights Reserved
DATI 3 - 59 stT 434 TOLDTR 5

SPECIFICATIONS
Tape Speeds:
33/4and7V2iPs
Tape Direction:
Both directions vritlout inverting tape reels
Tape Reels:
Madmum, 7" reels.
Running Time per Tape (Standard 1200-ft. tape):
I l/ 2 ips--30 minutes each track
3 3/4ips--60 minutes each track
Inputs:
Outputs:
and contact 3 of input socket.
Amplifier Output:
6 watts (double-ended push-pull output stage)
FastForwardandRewindTime(Standardl200-ft. tape): Fuses:
Loudspeaker:
3 permanent dynamic speakers, 18 x 13 cm
T\rbes:
EF 86, ECC81, ECC83, 8L95, 8L95, EL95,
EM ?1, and 4 selenium rectiJiers.
TK83O
AC Voltage:
Suitable for 50 cps AC only; 117 (110-127), 150,
200, 220, and 240 volts
Consumption:
Approximately 85 watts
Consumption:
At b0 cps, approximatelY 90 watts.
At 60 cps, approximately 100 watts.
5 x 20 mm, Din 415?1, surge resisting.
AC fusesl U? volts--l.6 ampsl 150 volts--l.25
amps; 200-240 volts--l.0 amp.
HT fusel 0.125 amp.
TK830V60 cps
Suitable for 60 cpe AC only; 1l? (110-12?), 150,
200, 220, and 240 volts.
Approximately 65 watts
Fuseg:
5 x 20 mm, Din 415?1, surge resisting.
AC fuses; l1? volts--I.6 amps; 150 volts--l.._
amps; 200-240 volts--l.0 amp.
Microphonel l. 5 millivolts/ 300K, contact I of Fuses:
lnput socket. 5 x 20 mm, Din 415?1, surge resisting.
AM-FM tunerl 5mi1livolts/250K, contactlof AC fusesl ll?volt--'.2b amps; lbO volts--'.0
lnput socket. amp; 200'-Zl0V--.09 amps.
Radio-TV-Phono; 100 millivotts,/ lmeg, contact HT fuse; 0. 12b amp.
3 of input socket.
TK83OU
External speakerl 12 ohms, contact 1 of output AC voltages:
socket- Suitablefor 50and 60cps, convertibte. AConlv'
Amplifler;0.6vo1t/ 5K, contact3ofoutputsocket 11? (110-12?)' 150' 200' 220' and 240 volts'
7 /2 ips--130 seconds
Automatic Stop Swttch:
Electromagnetic
Tape Run System:
Recordingandplaybackin bothdirections, oper- AC Voltages:
ated by track buttons.
Frequency Range:
At 7 l/ 2 ips--50 to approximately 15r 000 cps Consumplon:
At 3 3/ 4 ips--50 to approximately 10,000 cps
Recording Level Indicator:
Magic eye
Remote Control:
PAGE 2
Foot svritch222 for start, stop, and backspacing HT fusel 0.125 amp.

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FIG. I TOP VIEW OF MECHANISM WITH TOP PLATE REMOVED.
FUNCTION OF CONTROLS
Speed Switch
Set the Speed swltch before the recordlng is
started, although its positlon can be altered while the
tape ls moving. Never switch durlng fast renrind from
fast (? / 2 ips) to slow (3 3/ 4 ips) tape speed. How-
ever, swltching from slow to fast speed is possiblel
to the rlght for 7 l/ 2 ips, to the left for 3 3/ 4 ips.
Recording Level Control
. TheRecordlng Level knob controlsthe qualityof
the recording.
lnput Selector
The three discs on the left side of recorder are
used to select any one of the three different inputs.
The marking above the buttons corresponds to the
appropriate sockets at the back of the recorder. Any
or all of the lnput leads can remain connected to the
input socket at the rear of the recorder at all tlmes.
To select one of the lnputs, pull the notch of the disc
forward. A white fietd indicates the on positlon, a red
fleld, the off posltion of the particular input selectlon.
The input selector does not function during playback.
Volume Control 0n-Off Switch
The Off position is marked by a red dot. During
recording, this control ls used for monitoring and for
adjusting the volume in the buitt-in speakers or ear-
phones. During playback, this switch controls the
volume.
Tape Counter
The tape counter reglsters rt000't to "999". The
readlng may be noted while recordlng, ild reference
to any glven polnt on the tape may be rapidly made.
After a recorded tape has been logged or referenced,
always "zero" the indicator before playingthe recorder
and before the tape ls threaded on the reel.
Multi sonic Tone Control
The Multisonic tone control ls used only when
playing back through the built-in speakers or through
an external speaker. The left-hand disc of the Multi-
sonic tone control emphaslzes the bass boost, the right-
hand disc, the treble boost. By means of the middle
dlsc, all notes between thetwo extremitiesof the bass
and treble notes are controlled.
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PAGE 3

FIG. 2 FROM VIEW OF MECHANI SM
Stop Bar
TtreStop bar stopsthe motor and returns all de-
pressed buttons except the track buttons to neutral.
Safety Button/Temporary Stop Button
This button prevents accidental erasure. Moving
the depressed Safety button slightly forward locks it.
The tape will not move until this button is released.
The same button also serves as a temporary stop,
halting the recorder ineither record or playback only
as long as the button is depressed.
Trick Button- Speaker Control
The Trick button permlts blending of voices,
sound effects, or music into previous recordlngs.
The same button also cuts off the speakers. Depress-
ing the button switches off the built-in-speaker. De-
pressing and moving the button slightly forward will
lock it.
Recording Button
The Recording button is used with the Safety
button to place the recorder in the Record position.
Playback Button
fire Playback button places the recorder in the
Playback position.
PAGE 4
Track ll Button
The Track II button starts the recorder operating
on Track II, with the tape moving from right to left.
The recorderwill either recordor play back, accord-
ing to which button has been depressed.
Track I Button
Same as Track tr button, excepttape moves from
left to right.
Fast Wind Buttons
These two buttons are used to find thebeglnning
of aparticular recording. They startthe reelsturning
rapidly. The entlre tape can be wound from one reel
to the other in approximately two mfulutes,
NOTE: If eitherFastWind buttonsare in use, theStop
bar must be depressed before changing functions.
In other words, don't go from Fast Wind to Re-
cording or Playback withoutfirst depressingthe
Stop bar. When using either of theee buttons,
depress and release them immediately.
Voltage Selector
To set the voltage selector to another voltage,
pull out voltage tappingplug (83) in voltage setector (84)
and reset so that the voltage closest to the power supply
voltage is visible in the tiny window of voltage tapping
plus (83).

FIG. 3 REAR VIEW OF MECHANISM
OPERATI NG I NSTRUCTIONS
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Threading the Tape
l. Tworeels aresupplied, one full andthe other
empty.
2. The full reel fits on the left-hand spindle, the
empty one on the right.
3. Hold full reel in left hand with loose end of
tape hanging down left side of reel. Now
place the reel on the left-hand spindle. T\rrn
the reel slightly until lt falls into place and is
held securely by the ridges on the spindle.
4. Place empty reel on right-hand spindle.
5. Placetape into soundchannel andslip thefree
end lnto slot in empty reel. T\rrn empty reel
counterclockwise until tape is secured to reel.
N0TE: : The tape has a shiny and a dult slde. Always
be sure the shlny side faces the buttons.
Turning Recorder 0n
Once the voltage selector has been adjusted to
agreewlth rating of wall receptacle, the recordermay
be pluggedin. T\rrn Volume Control/On-Off switch to
the right. After a few seconds (while the tubes warm
up), the recorder is ready to record or playback.
To Record from Microphone
l. Depress Track I button.
2. Depress the small Safety button on the left of
the Recording button and then depress the
Recording button. Keep Safety button de-
pressed (or locked). Set Volume control to
low level.
3. Talk into microphone, holding it about lg in-
ches from the mouth. The Magic Eye will
start to flutter. Adjust Record Level control
until Magic Eye just closes on the loud parts
of speech. If the Volume control is too high,
the recording will be distorted.
4. Release Safety button. Tape will move from
left-hand to right-hand reel, and any sound
entering the microphone will be recorded on
tape.
NOTE: To switch tothe second track, ddpress Track
II button. The tape will move in the opposlte
direction, and the recording can be continuedon
other half of tape.
To Record f rom AM-FM Radio,
1. Connect lead 23? to tape recorder socket of
radlo and to input socket of tape recorder
marked AM-FM Tuner.
2. Operate middle input selector wheel.
3. Depress and lock Safety button. Depress
Record button and tune accurately to broad-
casting station.
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FIG. 4 BONOM VIEW OF MECHANISM
4. T\rrn Recording Level control clockwise un-
tilthetwo sectlonsof green lightof the Magic
Eye just begln to meet at the loudest passages.
5. Rel.ease Safety button.
6. At end of recording, depress Stop bar and
mark the reading of the tape corurter.
NOTE Lead 23? has 3-way ptugs on both endsl there-
fore, the radio must have a correspondin!socket
for proper connection. See 'Tnstalling Soiketfor
Connecting Tape Recorder to Radio. i'
To Rmord from Phonograph
l. Connect the leads from the pickup arm of
record player to the red and btack banana
plugs of connection lead 238.
2. Connect the 3-prong plug to socket marked
Radio-TV-Phono or recorder.
3. Fasten the ground of the pickup to the sleeve
of the plug.
4. Operate outside lnput selector wheel.
5. Start the record player.
6. Place recorder in Record position.
PAGE 6
To Record a Telephone Conversation
The Grundig TelephoneAdaptor 243T is a small
coil htdden in a plastic case. Thls coll picks up the
magnetic field from the coils wtrich form part of alt
telephones. With the coll, both incomlng and outgoing
conversatlons can be recorded.
fireplugof the adaptorftts intothe socket marked
AM-FM T\rner. Slighily molsten the rubber dlsc on
the bottom of ,the Adaptor-to lmprove its sticking power,
and press onto the telephone.
Dlfferent tlpes of telephones requlre a dlfferent
position of the Adaptor. Ilere is how to find the best
position for each tlpe:
1. Plugthe Adaptor lntothe socket marked AM_
FM Ttnerat rear of recorder, and swltch on
recorder.
2. Proceed as for recordlng, dtr the AM-FM
T\rner disc (middle selector) selected. T\rrn
RecordlngLevel eontrol to a convenient level.
" Liftthetelephonereceiversothat thedialtone
can beheard. MovetheAdaptor slowlyaround
thebaseof the telephone, with the rubberdisc
just touching the telephone. The Magic Eye
wiil oscillate, and the dial tone will be heard
tlrough the speaker. Do not forget to adJust
the monltor control. When the Magtc Eye

registers lts madmum deflection and the dial
tone is loudest, the best posltion has been
reached. Fastenthe Adaptor to the telephone
at thls polnt.
NOTE: The Adaptor ls sensitive to all klnds of mag-
netlc fields and should be used at least four and
one-half feet from the recorder.
IMPORTANT: : It ts against the law to record a tele-
phone conversatlon, except under certaln con-
ditlons. See your local authorities about tlese
condltions before recordlng a conversation.
Never record a conversation wtthout t}te caller' s
permleslon urder any clrcumstances.
To Play Recordings
l. fitread tape as described rnder "Threading
Tape. "
2. Set the two-speed selector knob to the speed
at whlch the recordlng was made.
3. Depress the Playback button.
4. Adjustt}eVolume control andturn thewheels
of the Multisonlc tone control for desiredtone
level.
Automatic Stop
Metal fotls at both ends of the tape automatically
swltchoff the motor. Ttre motor is switched off at the
end of each track whether the recorder is recording,
playingback, orfastwinding. To start tapeagain after
the motor has been switched off by the metal foils,
depress the track button (which is already depressed)
further.
High-Speed Fast Wind
Toplayacertain portlonof tape agaln, the entire
reelneed not berewound. Depress thecorrect button,
dependlng on which direction the tape must be trans-
ported. The Fast Wtnd (right to left) button is next to
theTrack I button, andtheFastWlnd(left to rlght)but-
ton is next to the Trick Button-Speaker control.
To Edit and Splice Tape
NOTE: Shce one track cannot be edited and spliced
without affecting the other track, recordings to
be edited should be llmited to one track only.
1. The tape may be edited by cutting out unwanted
portions or by ioining selections into another
sequence. Annormcements, etc., may be in-
serted between selections. Unused sections
of tape can be spliced for re-use.
2. Forbestresults, cuttape at aslight diagonal,
join ends with splicingtape on the glossy side,
and trim any excess width.
lnstalling Socket for Connecting Tape
Recorder to Radio
For high-quality recording from a radio, a
worthwhite improvement may be obtained by feeding
the recorder directly from the detector diode. This
makes the level of a recording independent from the
setting of the radio volume control and bypasses the
distortion of the output stage. The diode connection
consists basically of a potential divider, which should
be mounted as close as possible to the radio volume
control. If DC is present on the volume control, a
blocking capacitor should be added in series. The
value of 1-2 megohms is based on a radio delivering
apporximatety 100 millivolts to the diode load. Where
the voltage varies considerably from this figure, the
value in megohms may be calculated by multiplying the
voltage in volts by 17 (i. e. , 200 millivolts requires 3. 4
megohms).
Flg. 5 shows the measurements for the cutout
in the rear of the chassis.
FIG. 5 REAR CHASSIS CUTOUT
Fig. 6 shows the wiring. Both resistors are
connectedtocontact 1(recording) of socket. Contact 2
is lead-to-ground connection of Volume control. For
playback, contact 3 (playback) will be connected to
phone socket. For this connection, use shield wire
only if distance between connection points is large.
Generally, the socket is ground by fastening it to the
chassis, but the top of the socket housing can also be
solderedto the chassis. Connectionlead 23?, equipped
with 3-way plugs at both ends, is used to connect the
tape recorder to the radio. The part number of the
3-way socket is No. 5784 (Din 41524\.
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FROM DIODE RESP.
RATIO DETECTOR
I RECORDING
2 GROUND
3 PLAYBACK
FIG. 6 TAPE RECORDER-TO.RADIO SOCKET
PAGE 7

DI SASSEMBLY I NSTRUCTIONS
1. Remove the two control knobs and the two-
speed knob.
Unscrew the four coil-slotted brass screws.
Lift offtop deck (38) and unscrew the six small
nuts securing the chassis to the cabinet.
Lift the chassis partly out of the cabinet.
5. Unplug the loudspeaker leads.
Now lift the chassis completely out of the cab-
inet. Never lift the chassis by the clutches because
serious damage will result. When the chassis is clear
ofthe cabinet, alltubes willbe readily accessible. By
removing the bottom screen, all components can be
easily reached.
2.
3.
4.
All bearings are oilite, and regular lubrication
ls unnecessary, After approximately 1,000 hours,
however, lubrication may be required. Two types of
motors are used, and they should be lubricated as
follows:
1. Motor with oiling facilities in friction and
lower ball bearing only--These types can be
recognized by the shallow dish in the upper
mounting plate, with an inserted felt ring, ol
by the cap, with an oiling ho1e. Oil the felt
inserts and fill the containers for lubricant
with light machine oil.
2. Motor with oiling facilities in lower friction
Pressure Roller and Drive Capstan
Dirt or other foreign matter on the pressure
roller or capstan will increase wow and may cause tape
to jump from its guides. Remove any tape residue,
bearing and ball bearing for splndle, and
facilities for greasing upper friction bearing
througha grease container--These types can
be recognizedby the shallowdish inthe upper
mounting plate, with cover and wittrout felt
insert. Lubricate thelower bearing as in step
1, and fill the grease container in the upper
mounting plate with Sta-Put gTease.
Clean all other self-lubricating bearings by wip-
ing off dust, 8;rease, and all other foreign matter.
Then lubricate the bearings with machine oil. Avoid
excessive oiling, because surplus oil nrill be thrown
ontodrive belts, clutches, pressure roller, orfrlction
wheels.
LU BRI CATI ON
CLEANI NG
ADJUSTMENTS
dust, and dirtfrom therollerby holding a pieceof fine
sandpaper against the roller while it ie rotating.
Crocug paper is recommended for cleaning the drive
capstan; lts surface should always look highly polished.
El ectromagnetic Cl utches
Clutch components or the complete clutch as-
semblymay beeasily adjusted or replaced. However,
faults must be correctly diagnosed before any clutch
repairs are attempted.
A braking actionis obtained from the left clutch
in the Record and Playback positions on Track I, and
in the Fast Wind right to left. The right-hand clutch
acts as a brake in the Record and Playback positions
on Track tr. Clutching coil (4) is not energized, and
the felt insert of upper clutch spindle (3), which is
braking, regtg on the polished top of surface of its
clutch drive pulley (8). The pulley is kept static by
unidirectional drive pulley (13) or (14), to which it is
coupled by drive belt (16). Upper clutch spindle (3) is
rotated by the unreelingof the tape and exertsa brak-
ing action proportionalto the weight of the tape or reel.
A smallamount of torque is appliedto the right-
hand upper clutch spindle (3) in the Record and Playback
positionson Track I, and to the left-hand upper clutch
spindle (3) in the Record and Playback positions on
Track II. Ctutching coil (4) is not energized, and
clutching disc (6) rests on its three washers (7) in
clutchdrivepulley(8). The pulleyis driven at approx-
imately 650 rpm at 7 I/ 2 ips and approximately 325
rpm at 3 3/ 4 ips, and a slipping clutch action occurs
PAGE 8
between the felt inserts of upper clutch spindte(B) and
tlte top of clutch drive pulley (8). This action is dir-
ectly proportional to the amount of tape on the reell
i. e., the torque increases at the weight of the tape
increases. The tapepull shouldbe reasonablyuniform
over the entire tape. In both Fast Wind positions,
clutching coil (4) of the take-up clutch is energized.
This liJts clutching disc (6) and tocks it to the plastic
insert of upper clutch spindle (3). The tape will then
be rapidly wound onto the reel.
Replacing Clutch
To remove complete clutch (2), firstdisassemble
unit and remove from cabinet (see "Disassembly In-
structions").
1. Unsolder the two leads to clutching coil (4)
and remove upper clutch spindle (3).
2. Remove bottom locking nuts (11) and lift out
clutch.
3. Insertnew assembly and half-tighten thebot-
tom nut.
4. Insert two 0.2-mm steel washers between
clutching coil(4) and upper clutch spindle(3).
Rotate upper clutch spindte (3) and observe

FIG. 7 EXPLODED VIEW OF CLUTCH ASSEMBLY
whether its felt insert just clears the top of
clutch drive pulley (8). If it does, remove
the top steel washer (leaving one washer on
the shaft) and again rotate upper clutch spindle
(3). The felt tursert sirould now touch the top
half of clutch drive pulley (8), causing a
smooth friction.
5. To adjust for comect alignment, hold bottom
hexagonnut and turn the shaJt (with a screw-
driver) clockwlse to reduce the spacing and
counterclockwise to increase the spacing
between the clutch parts.
6. Make sure both clutch spindles are even with
each other by holding a steel straightedge
across their tops. Then tighten the lower
hexagon nutand recheck as follows: Insert a
0. 2-mmwasher andcheck for sufficient fric-
tion between clutch drive pufley(8) and upper
clutchspindle (3). Next insert a secondsteel
washer. Upper clutch spindle (3) should just
clear clutch drive pulley (8). Now remove
both washers, replace upper clutch spindle
(3) and the upper clutch spindle securing
bracket(30), and resolder the two clutch coil
leads.
Unidi rectional Drive Pul leys
The maximum play of wridirectional pulleys (13)
and (f4) should not exceed 50o. The pulleys must not
be subjected to any pressure. If the fault occurs in
any part of a unidirectional drive pulley, replace the
complete item.
Centrifugal SwitCh
When centrifugal switch (66) is in neutral, the
middle contact is raised by the opet'ating pin. The
upper contacts should be deflected in this position by
0.3 mm or | 64".
Recordi ng/ Playback Head
The bias current to each recording/playback
head when recording is approximately 1 milliamp and
may be meagured by inserting a 200-ohm resistor ln
series with the chassis return lead of the head. The
potential drop across this resistor should be 200
millivolts + 10%. If the current differs considerably
from this fTgure, adjust Cl8 for Track II and CI6 for
Track I. The erase voltage to each head, measured
with a VTVM, should be 125-150 volts.
With 5 millivolts at 1 kc fed into the diode socket
and with the Recording Level control at maximum, a
head current of 16 millivolts across a resistor of 200
ohms ln the chassis return lead of the head should be
obtained. Remove the EL95 oscillator tube for this
test.
The positioning of the head assemblies is very
critlcal and is particularly important for perfect re-
production of recordings made from a different record-
er. Make the adjustmentwith a test tapeorwitha tape
on which a frequency of 6 kc has been recorded. The
recording/playback heads are plugged into the base-
plate and attached to the chassis by two screws. By
atteringthesettingsof these twoscrews, the head may
be correctly aligned. Check this alignment by connect-
ing aVTVM into the high-impedance outputsocket and
playing back the test tape. Then adjust the recorder
until theVTVM shows maximum deflection. Theheads
can also be aligned horizontally so that the head gap
just contacts the tape. When the tape erepb rubber
pressure rollers (33) are moved away, the output
should not vary by more than 2 db. When the tape is
running in Track I, the top edge of the left-hand re-
cording,/ playback head should be 0. I mm above the
top edge of the tape, and in Track I[, the bottom edge
of the right-hand recording/ playback head should be
about 0.1 mm below the bottom edge of the tape. The
pole pieces of the corresponding erase heads should
be level with the (top or bottom) edge of the tape.
When the recorder is running, the tape should be
guided within the guide posts in an absolutely straight
line.
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PAGE 9

Hum Level
Adjust humdinger Rb for minimum hum level
with the recorder switched to the straight amplifier
position (depress both track buttons). Then adjust
humbuckingcoil L3, under playback conditionson both
tracks, for minimum hum. Thelevelshouldnotexceed
V 200th of 1 kc with a recording made atfull modulation
level on both tracks and at both speeds. This corres-
ponds to a hum content of -46 db, and a compromise
setting must be found so that the hum at either speed
or track does not exceed this level.
Absorption Coil
Remove oscillator EL95 and switch to Record.
Connect a signal generator, set at 15 kc, to the diode
input. Connect a VTVM to the high-impedance output
socket and adjust the signal generator output for a
convenient reading on t}te VTVM. With the two-speed
!T!"h at 7 l/ 2 ips, adjust the core of absorption coil
L2 for maximum deflectionon the VTVM. Now reduce
the -audio frequency to g kc and set the two-speed switch
to 3 3/4 ips. Note the reading on the VtyU anO
slightly sweep the signal frequency above and below
9 kc, observing whether the peak is indicated with a
signal of I 4-t 300 cps. If not, repeat the procedure,
this time with the frequency just above 15 kc and fed
to the diode input at 7 l/ 2 ips.
Head Assemblies
After the recorder hag been used for a while,
the heads should be inspected, and any dirt or iron
oxide should be carefully removed. Removal is best
done with a match or orange stick and, perhaps, with
methylated spirits. Never use carbontetrachlorideor
any acetone fluid; these will damagethe plastic casing
of the heads.
TROUBLE CHART
Symptom Cause Remedy
Tape does not move in Record or
Ptaybaek, but motor runs. l. Tape not threaded
properly.
Pressure slider (28)
jamming.
Faulty pressure
solenoid (2?) or
related circuit.
Thread tape properly
(see "Threading the
Tape" under "Operating
Instructions").
AdJust and/ or lubricate
pressure slider (28).
Check and repair.
2.
3.
2.
3.
Recorder does not run at coruect
speed when recording or playing
back.
l. Too much friction on
supply reel. 1. See "Electromagnetic
Clutches" under "Ad-
justments. "
2. Realign sound channel.
3. Clean and lubricate
shaft.
4. Check tape counter (18)
and drive belt (17), and
replace, i,f necessary.
5. Replace motor.
6. Thread tape properly
(see "Threading the
Tape" under "Operating
Instructions ").
4.
2.
'3.
5.
6.
Tape jams in tape guides.
Pressure roller (34)
jamming.
Tape counter (18)
jamming.
Faulty motor.
Tape not threaded
properly.
Tape runs sluggishly when
starting. l. Faulty centri-fugal
switch (66).
2. Spring set assembly
(67) of centrifugal
switch (66) not closing
in running position.
Check push rod in
motor spindlel clean
and lubricate, if nec-
essary.
Adjust.2.
Tape nrns slowly in
either Fast Wnd
position.
PAGE IO
l. Check push rod in
motor spindlel clean
and lubricate, if nec-
essary.
I
1. Faulty centrifugal
switch (66).