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  9. Grundig MAJESTIC TK83O User manual

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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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).
TRO UBLE CHART (CON'T. )
Symptom Cause Remedy
2. Spring set assembly
(6?) of centrifugal
switch (66) closing
in running position.
2. Adjust.
No fast wind. 1.
2.
3.
2.
3.
1. Clutches improperly
adjusted.
Clutching coil (4)
defective.
Clutching coil (4)
not being energized.
See I'Electromagnetic
Clutchest'under
"Adjustments. "
Replace clutching coil
(4).
Check circuit.
Head assemblieg wear
too quickly. 1. Crepe rubber pressure
roller (33) improperly
adjusted.
l. Adjust crepe rubber
pressure roller (33).
Tape jumps from tape
guides. Pressure roller (34)
and capstan spindle
not para1lel.
Dirt or iron oxide on
pressure roller (34) or
on capstan spindle.
Sound channel not
correctly adjusted.
I. Adjust shalt of pressure
roller (34), or replace.
Clean and polish pres-
sure roller (34) or
capstan spindle.
Adjust tape guides.
2.
3.
2.
3.
Tape scrapes against
edge of reel.
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la
1.
2.
l.
2-
3.
Reel warped.
Tape guides out of
aligrment.
Clutches improperly
adjusted.
Replace reel.
Realign tape guides.
3. See "Electromagnetic
Clutches" under
"Adjustments. "
No fast wind. 1. Clutches improperly
adjusted.
Clutching coil (4)
defective.
Clutching coil (4)
not being energized.
See "Electromagnetic
Clutches" under
"Adjustments. "
Replace clutching coil
(4).
Check circuit.
2.
3.
2.
3.
Ilead assemblies wear
too quickly. 1. Crepbrubber pressure
roller (33) improperly
adjusted.
1. Adjust crepe rubber
pressure roller (33).
Tape jumps from
tape guides.
2.
3.
l.
2-
3.
Pressure roller (34) and
capstan spindle not
parallel.
Dirt or iron oxide on
pressure ro11er (34)
or on capstan spindle.
Sound channel not
correctly adjusted.
l. Adjust shaft of pressure
roller (34), or replace.
Clean and polish pres-
sure roller (34) or cap-
stan spindle.
Adjust tape guides.
Tape scrapes against
edge of reel.. O
tf
rn
n
\JI
l.
2.
1.
2-
Reel warped.
Tape guides out of
alignment.
Replace reel.
Realign tape guides.
PAGE II
TROUBLE CHART (CON'T. )
Symptom Cause Remedy
3. Clutches improperly
adjusted. 3. See "Electromagnetic
Clutches" under
"Adjustments't.
Safety button jamming. t.
2.
Burr on locking bar
of Safety button.
Tape deck not
correctly aligned.
l. Clean bar.
2. Remove deck and adjust
location of push-button
assembly (51) (unscrew
two screws in front of
cast top frame).
Right-hand reel spindle
sluggish when starting. Too much friction from
tape counter (18).
Too much frlction from
reel spindle on shaft.
(This also applies to
left-hand reel spindle).
1. Replace tape counter(l8)
2. Clean and lubricate
shaJt.
2.
Distorted recordingl
low volume due to no
recording bias.
1. Faulty bias oscillator
tube EL95 or oscillator
c0il.
Faulty recording head.
I. Check and replace.
2. Replace both recording
heads.
2.
No erase. 1. Faulty bias osclllator.
2. Faulty erasing head (21).
1. Check and replace.
2. Replace erasing head
(21).
Cross talk from other
channel. l. Recordlng head or erase
head gap not correctly
adjusted; tape not guided
horizontally.
l. See 'R.ecording/ Play-
back llead" under
" Adjustments. " Adjust
tape guides. Make sure
that tape rnns freely in
all four tape guides.
Recording and erase heads
cannot be adjusted to an
exact vertical position. l. Dirt or foreign matter
under heads. l. Clean heads.
Wow and flutter. 1.
2.
t.
2.
3.
4.
3.
4.
Jerky clutches.
Tape scratches against
screening hoods of
record,/ playback heads.
Tape not guided horizontally.
Too much pull from
take-up reel.
Check clutch adjustment.
Adjust screening hoods.
Check and adjust.
See "Electromagnetic
Clutches" under "Ad-
justments".
Hum level too high. 1. Hum-bucking coil
L3 not adjusted.
2. Humdinger Rb not
adjusted.
3. Seater-to-cathode short
in EF86 (Vl).
Readjust; see'rHum
Level" under "Adjust-
mentgtt.
Readjust; see "Hum
Level" under t'Ad-
justmentsr'.
Replace EF86.
1.
2-
3.
PAGT 12
TROUBLE CHART (CON'T. }
Symptom Cause Remedy
4.
5.
4.
5.
Faulty ECC81.
Faulty recording/
playback head.
Replace ECC8l.
Replace bottt heads.
Low galn. l.
2.
3.
4.
Faulty recording bias.
Bias oscillator doeg
not oscillate.
Faulty recording head.
Faulty output transformer,
T2.
Low B+.
Adjust C16, C18, R4.
Change oscillator tube
EL95.
Replace both heads.
Replace output trans-
former, T2.
Check rectifier.
1.
2.
3.
4.
No playback. 1.
2.
1.
2,
Faulty switching.
Blas oscillator
oscillates in playback
position.
Adjust.
Correct switching.
Cuts off at 51 000 cps
Ln 3 3/ 4 ips position. t. Absorption coil L2
improperly adjusted.
Recording made with
gap of recording head
in different position.
Worn head.
Dirty head.
See "Absorption Coil"
under "Adjustmentst'.
Realign head.
Replace both heads.
Clean head.
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*=
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F5
2.
3.
4.
3.
4.
Too much treble
response on playback, l. Absorption coil L2
improperly adjusted. l. See "Absorption Coil" { f|
under "Adjustments." $ 3
High background nolse
on erased tape. l. Tape guides or heads
magnetized. 1. Demagnetize tape guides
or heads. E9
LllrF
gl
Crackle in playback
position when motor
ls running.
1. Lead touches rotating
cage motor. 1. Correct.
Hum when recording
from microphone. 1. Stray AC fields. 1. Correct.
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PAGE 13
MECHANICAL PARTS LIST
Ref.
No. Part
No. Descriptlon
11
12
13
I
2
3
4
5
6
7
I
I
10
l4
l5
l6
t7
r18
l9
20
2t
22
23
24
25
26
27
28
29
30
3l
32
33
34
35
36
3?
38
39
40
4t
42
43
44
45
5024-004
0279-284
0279-285
5021-051
9604-319
0279-296
9604-321
0219-293
9604-726
9604-320
02?9-303
7882-006
0354-031
0354-034
0354-330
0354-331
5021-018
0628-124
7485-512
7489-008
7485-533
?489-001
02?9-048
96r9-518
?485-53?
?485-560
7485-563
?485-514
?485-516
7485-564
060?-050
0279-044
b021-080
0354-27r
02?9-210
5021-039
5016-044
9628-220
5021-03?
0354-006
0607-061
5016-04?
5021-032
Cast Top Frame
Complete Clutch
Upper Clutch Spindle
Complete Clutching Coil
Plastic Washer (Simrit White)
26 x 8.2xQ.2
Clutching Dlsc
Plastic Washer (Simrit White)
15x6.1x0.3
Clutch Drive Pulley
Steel Washer 15 x 8. 2 fl.z
Plastic Washer (Simrit)
15x8.2x0.5
Locking Nut (2)
Complete Motor 50/ 60 cps
Uni-directional Drive Pulley
(Left Locking)
Uni-directional Drive Pulley
(Right Locking)
Drive BeIt (Motor-Uni-direct-
ional Drive Pulley) (2)
Drive Belt (Uni-directional
Drive Pulley Clutch) (2)
Drlve Belt For Tape Counter
Tape Counter
Outer Tape Guide Post (2)
Bracket For Erasing Head (2)
Erasing Head (2)
Left Hand Base Assembly For
Rec./Rep. Head
Bec.,/ReP. Head (2)
Inner Tape Guide Post (2)
Compression Spring For Inner
Tape Guide Post
Right lland Base Assembly For
Rec.,/Rep. Head
Complete Pressure Solenoid
Complete Slider With Lifting
Post For Pressure Roller
Spring Clamp
Upper Clutch Spindle Securing
Bracket
Extension Spring (2)
Compression Sprine (2)
Complete Crepe Rubber Pres-
sure Roller With Fittings (2)
Pressure Roller
Complete Two-Speed Selector
Rubber Buffers (6)
Washers For 36 (6)
Complete Top Deck With
English Descriptions
Plastic Head Cover
Grundig Emblem
Operating Indicator Ptate With
English Descriptions
Scale For Recorder Level
Control
Two-Speed Indicator Plate
English
Perspex Window For Tape
Counter
Perspex Wtndow For Input
Selector
Ref
No. Part
No. Descriptlon
46
47
48
49
50
5r
52
53
54
55
56
57
58
59
60
6I
162
lee
lo+
t65
loo
loz
1.,
los
lzo
lzr
lzz
I
lzs
74
?5
76
77
78
?9
80 1
8rl
82 I
83 I
84 I
85 I
86 I
8?l
88 I
8eI
e0 I
el I
s2 I
e3 I
s4 I
e5 I
e6 I
9?l
5021-036
5016-05r
5016-052
5016-053
7482-002
?482-5lt
7482-507
?482-508
7482-513
7482-515
?482-536
?482-53?
7482-567
1482-544
7482-551
?482-561
7482-562
o21S-044
0354-079
5024-039
5024-040
?481-00?
?481-009
7482-539
?482-538
7482-640
7482-64t
?485-004
5021-082
035r-013
0810-018
0810-019
0810-022
0810-023
9631-308
0279-234
?689-010
0279-226
9625-621
0154-0r?
5844
5021-030
7482-526
7482-524
7482-522
5016-058
0809-014
0600-098
Tone Control
Scale For Volume Control
Complete Plasttc Sound Channel
Cover
Golden Finished Insert For (48)
Clover Emblem
Push Button Assembly
Medium Operating Slide For
Stop Bar
Operating Slide (3)
Operating Slide (3)
Small Operating Slide (LeftHan$
Small Operating Slide (Right
Hand)
Compression Spring (9)
Extension Spring (3)
Spring Set Ass,y. (With Con-
tacts e l-2-3)
Spring Set Assry. For Stop With
Contacts
Spring Set Aas'y. For Cut Off
Speaker, And Erase Current
WitI Contact t t-2-3
Left Hand Switch Bank Assry.
Right lland Switch Bank Ass'y.
Five Pin Plug (a)
Shaft For Extension Piece (2)
Centrifugal Switch
Spring Set Assry. For Centrifu-
gal Switeh
Hi-Fi Multisonic Tone Control
Input Selector
Stop Bar
Press Button (6)
Becording Safety And Temp.
Stop Button (Red)
Trick And Spealer On-Off But-
ton (Black)
Complete Sound Channel Assry.
Spring Set Assry. For Two
Speed Selector
Complete Extension Piece
6-Way Plug Wtth Guide Pins
6-Way Jack
5-Way Plug
5-Way Jack
Wire Guard
Line Cord
Voltage Tapping Plug
Voltage Selector
Screw Plug For Fuse
Complete IIi Fi Panorama Speak-
er Socket
Complete Ground Socket
3-Way Jacks (4)
Complete Back Socket
Speaker Jack
Complete Switching Slide Short
Complete Switchlng Slide Long
Complete Locking Slide Lower
Two Speed Selector Knob
Control Knobs (2)
Screening Hood (2) |
Remote Control Socket I
PAGE 14
TOP VIEW OF MECHANISM WITH TOP PLATE REMOVED.
#]', t41l ;*d.t$1}r
.5-: '-.{
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EL 6267
TOP VIEW OF MECHANISM WITH TOP PLATE & FRAME ASS'Y. REMOVED
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PAGE 15
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PAGE 16
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PAGE 17
ELECTRI CAL ADJU STMENTS
Adjustment of llead Currents
The Bias Current to each of the Recording/ Playback
Heads is approximately IMA when recording. This
current may be measured by placing a 2004 resistor
in series with thechassis returnlead of each headand
measuring the voltage drop across the resistor. The
voltage drop across the resistor should be .2 + lOL
If the Voltage differs considerably from this filure,
adjust Cl8 for track number II and Cl6 for track num-
ber I. The Erase Voltage across each head should be
between 125 and 150 volts measured with a VTVM.
With the oscillator tube (Vb) removed from its socket
and the recording level set at maximum, a IKC signal
at 5 millivolts fed to the Diode Socket should provlde
a voltage of 16 millivolts across the 200 ohm test re-
sistors. Remove resistors after adjustments. Replace
Vb in its socket.
Modulalion Level Adiustments
Feed a lKC signal at a level of 20 millivolt into the
Diode Input and adiust the Recording Level Control
until the two halves of the Indicator Tube (V3) iust
begintotouch. Record and measurethe thirdharmonic
distortion content onplayback bynieans of a Distortion
meter. The reading obtained should be 4%+ l% with a
maximum difference of go between track Iand II. If
the reading is more than 5$, R6 should be adjusted to
close the eye at a lower setting of the Recording Level
Control. The Indicator Tube should be opened un bv
adjusting RO if the reading obtained is loiver than 396.
Absorption CoiI Adjustment
Removethe Oscillator tube (V5) and switchto "Record".
Connect an Audio Oscillator totheDiode Input and set
for l5KC. Connect a VTVM tothe high impedance out-
put socket and adjust the audio oscillator output for a
convenient reading on the VTVM. Wittr the two speed
switch set to ?| lps, adjust the absorption coil Li for
maximum defleetion on the VTVM. Reduce the audio
frequency to 9KC and switch speed to 3 2/ B ips. Note
the readlng on the VTVM and stightly rotate the fre-
quency above and below gKC noting whether the peak
is indicated wtth a signal of 9KC + 300 cps. If not, the
procedure should be repeated, th-is time with the fre-
queqcy just above or below ISKC fed tothe Diode Input
at 7f ips.
BACK VIEW OF FRONT SWITCH ASSEMBLY
PAGE 18
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PAGE 22

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