Revere T-1100 User manual

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=GENERAL INFORMATION
Revere Models T-1100, T-1120, andTR-1200 Tape Recorders feature a single three position
functionknob which performs the electrical and mechanical functions for "Record", "Stop", and
'-'Play"operations. Allthreerrnits basically incorporate the same tape transport mechanism but
differ slightly in amplifier circuitry and component values. The existing ditferences are best
pointedoutin the schematic diagrams, exploded views, and mechanical & electrical parts lists.
The Model TR-1200 is the same as Model T-1100 except for the addition of the Bfgg-6 Radio
Tuner Sub-Assembly. Model T-1120 is the same as Model T-1100 except for a built-in stereo-
phonic head and preamplifier (El199-11) for the lower channel. Treatment of the subject matter
pertainto the machines as being used a"s a monaural unit and information given for Model T-1I00
will cover Models T-1120 & TR-1200 unless noted otherwise.
These units are designedto recordtwotracks of material on standard width recording tape ,
which doubles the playing time of a tape reel with no loss of frequency response of quality. Re-
cordings may be made from microphone, phonograph, AM-FM tuner, Hi:Fi systems, external
radioortelevision, in additiontothosemadedirectly from the self-coniained "adio used in Mode1
TR-1200.
CAUTION: Do not use on direct current. Check name plate at rear of recorder for proper
current and voltage.
Manufactured by:
Revere Camera Company
320 East Twenty-First Street
Chicago 16, Ill.
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fhis moteriol compiled ond pvblished by
w. sAts & Go., tNc., INDIANAPOIlS,
c322
Copyrighr 1958 . All Rights Reserved
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INDIANA
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lllTt I -58 F0IDER 15

INDEX
COUNTER INSTANT REC_OLD rocK
BUTTON
STOP
SPEED
CHANG
KNOB EHIGH
SPEED
LEVER
ON.OFF
VOLUME
CONTROL
MICR PHONE
NORMAL-
DISTORTED INPUT
JACK
INDICATOR
FUNCTION
KNOB ADIO
DIAt
PITOT
LIGHT TONE
CONTROL
Figure l.
SPEC IFICATIONS
Tape Speeds - g 3/4 and7 f/2 ips x2%. Recordirg Indicator - ,rNormat,, half of indicator ir-
Head - Hau track recording head (Moders r-1r00 & f;::l?h:r,tffiTjl1ilh1t
TR -1200). ed' ha11 indicates 8% dtstortion.
Head - h-lirle etacked head with balanced hum'buck- ReeI Size - up to ?".
lng construction (Modei r-1120)' Tracks - Duar.
Frequency Responae (Models
. T-1100 e rn-rzoo) r3db, 85-?000 cps @ Track selection - Manual turnover'
B l,/4 ips.
*sdr, ibirrooo "p" @ Tape Loading - Drop-in-elot type.
7 1/2 ips' Fast Forward & Rewind - Approximately go sdconds
Frequency Respolse on a ?r'reel (1200 ft')
(Model T-1120) Upper channel: *gdb, ?5-13,000 phying Time (?,,Reer) _ 2 hours @ 3 B/4 tps (1 hour
cps @ 7 L/.2 ips. +sdb, ?b-8000 each tra;k).
cps @ 3 s/4 ips. (Recording & 1 nott @ i'i/z ips (11 hour
Playback). each track).
Lower_channel: +11b, Jb-13,0_09 Inputs _ Microphone input (short ptug) 10 megohma
cps @7 l/2 ipe. (Plaiback only) impedance; accepts'voltages from boo micro.
volts to 0.2 volts. Radio-Phono input 1 meg-
sigml To Noise Ratlo - Greater than 48 &, ohm impedance; operates n'ithvoltages from
0.025 to 10 volts.
Signal From Lower Chanlel
p;;:;fi-b;tp;;'(M"a-li"i:r rzol - 0.5 - l.b vous. output - 3'2 ohm nritft negative fee&ack suitable for
direct connection to 3-4 ohm speakers, high
cro8gtalk (Model r-1120) - Less than 50 db. lmpedance amplifier inputs, or earphonea'
wow & Frutter - Less tran .g% (Both sDeed-6). 'size -- 9 l/2" * 'n" x 13 1'l2" (approx')
Weight of Recorder - 2? Ibs.
Distortion -- Overalt amplifier and tape dlstortion at Power Requlrements - 105-120 Volts AC, 60 Cycles.
low levels is leas than 1%, and at maxi- Power Consumption - 90 Watts (Model T-1100),
mum output ol 5 watts is 8% at 1000cps. 100 Watts (Model TR-1200).
Page 2

Figure 2.
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FUNCTIONS OF CONTROLS,
(Refer to Figure 1.)
0n-Off-Volume Control
Initial clockwise rotation of this control supplies
power to the entire recorder; further rotation regulates
thevolume for both the recording and play-back oper-
ations.
Tone Control
This control is designed to give three distinct
tonal extremes, and can be varied continuously between
them to produce a blend of tone suitable to any type of
program. The tone control is automatically discon-
nected when recording.
Function Knob
AIt electrical and mechanical functions for
"PIay" and "Record" operations are performed by this
single three position knob. AIso, for convenience and
protection, the Function Knob is returned to "Stop"
position when the power On-Off-Switch is turned of{
thus disengaging all pressure pads and rubber idlers.
I ND ICATORS & SW ITCHES
Speed Change Knob
Operation of this knob selects either 3 3/4 ips,
(slow speed, "S"), or 7 1/2 ips, (fast speed,"F'), tape
speeds while the recorder is in any function. The fi-
delity on 7 t/2 ips selection is greater insofar as re-
cording-reproduction is concerned.
Automatic Record Lock Button
This is a safety device preventing the Function
Knob to be turned to "Record" position, thus guarding
recordings from accidental erasure. The Lock Button
is re-set whenever the Function Knob returns to the
"Stop" position. To make a recording, the Record Lock
Button must be depressed before Function Knob can be
turned to "Record" position.
Rapid - Forward Rewind Lever
This lever is used to skip ahead to any point on
the tape or to rewind tape onto the supply reel. By
moving this lever back & forth the tape can be inched
along in either direction to find an exact point on the
tape. This levercan bemovedwhile the Function Knob
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Page 3

Figure 3.
is in either "Record" or "Play", and the lever will
automatically return the Function Knob to "Stop".
Manual Start-Stop Button
This button is provided to instanily stop the tape
in either "Record" or "PIay, functions. Examples of
its use are: to prevent recording of unwanted breaks
in radio programs; to noiselessly hold back the tape
for instantaneous starts in either "Record" or "play"
functions; to precisely pre-set the record level while
the Function Knob is in "Record" position; to momen-
tarily stop tape in transcribing.
Record Level lndicator
This indicatortakes the guessworkout of setting
the recording level. The volumecontrol should bead-
justed until the "Normal" half of the indicator flashes
and no flashing occurs at the "Distorted" half. If it is
desired to preset the level in "Stop" position, turn the
tone control to treble.
lndex Counter
This is a precision revolution Counter enabling
Page 4
pinpointing of selections. The Counter is re-set by
turning the Counter wheel back.
Dual Hi-Lo lnput Jack
I The Input Jack is designed to make the proper
selection between the low level microphone (requires
short input plug 15n6" Iong) or high levelradio-phono
connection (requires long input plug, I g/!6,, long),
thus making two input jacks unnecessary. When the
longer input plug (three circuit) is used, the speaker
is automaticallyconnected for monitoring in "Record"
position or for public address in "Stop" position. When
the shorter plug is used, the speaker is left discon-
nected. Regardless of which input plug is used, in
both cases the buitt-in radio used in Model TR-1200
is disconnected.
Output Jack
Located on the rear panel,this jack can be used
to connect accessories such as a remote speaker (3.Zf,}),
or earphones. The Attachment Cord can be used'for
this purpose. See Auxiliary parts List page 24 for
l-isting of accessory parts. The speaker in the recorder
is automatically disconnected whenever a plug is in-
serted in the Output Jack.

Figure 4.
OPERATI NG INSTRUCTIONS
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Threading The Tape
1. Plug linecord in socket provided at the rear
of recorder, and plug the linecord plug into a conven-
ient wall receptacle of the proper rating as specified
on name plate.
2. PlacefuII supplyof tape (glossy side out,i.e.
"A" wind) on left spindle and empty reel on right spind-
le, making sure the reels are fully seated.
3. Unwindabout 14" of tape from the supply reel.
Hold a section of the tape straight with both hands and
insert the tape in the tape slot making sure the dull
coated side of the tape faces the rear of the recorder.
Feed the end of th'e tape into one of the radial slots in
the empty reel. Rotate the reelcounterclockwiseuntil
the tape is secured and aII slack is taken up between
reeIs.
To Record From Microphone
Note: The Revere automatic high frequency erase re-
moves previous recorded sound when new ma-
terial is recorded; therefore, no special step is
necessary to erase recordings before new re-
cordings are made. The Erase functions only
when the Function Knob is in "Record". By
turning the volume control down, the recorder
will erase withoutputting new soundon the tape.
1. Insert microphone plug firmly into input jack.
2. Turn tonecontrol to treble, and while talking
into the microphone adjust the volume control until
"Normal" half of indicator flashes and no flashing
occurs at the "Distorted" half.
3. Set the index Counter to zero. While holding
the Record Lock Button in its depressed position, turn
the Function Knob to "Record" position.
To Record From Radiq TV, 0r Phonograph
l. To Record From Radio or T.V. - Insert
Attachment Cord plug into the input jack on the re-
corder. Connect the cord clips to the radio or T.V.
speaker terminals. Proceed with recording as des-
cribed, in "To Record From Microphone".
2. To Record From Phonograph -Insert stand-
ard phono plug, used with most crystal or magnetic
type phonographs, into input jack onrecorder. If stand-
ard phono plug is not used, Attachment Cord may be
used. Proceed with recording as described in "To
Record From Microphone".
Monitoring Recordings
The longer L-3/t6" standard phone plug, when
inserted in the input, turns on the recorder speaker
for monitoring radiq T.V, or phono. Tomonitormike
recordings, a high impedance headset can be plugged
into the output jack. Monitoring mike recordings from
the recorder's speaker can be accomplished by using
the microphone P.A. extension cord accessory. (See
Auxiliary Parts List). With this cord, the speaker is
connected for Public Address in "Stop" position and
Speaker Monitoring in "Record" position.
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Page 5

Figure 5.
To 0perate Radio-Recorder Combi nation
(Model TR-1200)
1. To Listen To Buitt-In Radio - Any plugmust
be removed from recorder's input jack. Turn Function
Knob to "Stop" position, and adjust tone & volume
controls to desired levels. To disconnect Radio, while
in "Stop" position, any plug can be inserted into the
input jack or the Radio can be de -tuned.
2. To Record From Built-In Radio - Any plug
must be removed from the input jack. No external
connections are necessary. Proceed with recording
as described in "To Record From Microphone".
3. Whenexternal sources of recording material
are used, the built-in radio wiII be automatically dis-
connected by the insertion of the respective plug into
the input jack.
Twin-Track Recording
1. These recorders are designed so that each
reel of tape holds two full length recordings, one on
each half of the duII'.side of the tape.
2. After the first track has been recorded, a
second recording can be made on the same side of the
tape by removing the reels from the recorder, turning
them over, and placing them on opposite spindles.
3. Thread the tape and proceedwith the record-
ing as previously described.
4. After the second track has been recorded,
the first track is ready to be played, withoutrewindirig,
by changing reels as described in Step No. 2 above.
Page 6
Splicing & Editing
Note: Since it is impossible to editandsplice one track
without affecting the other, recordings which
are to be edited should be limited to one track
only.
1. The tape may be edited by cutting out un-
wanted portions, or by joining selections into another
sequence. Announcements may be inserted between
selections, etc., and unused sections of tape can be
spliced together for re-use.
2. For bestresults,cut tape ata slightdiagona!
join ends together with splicing tape on the glossy side,
and trim off any excess width. Use Scotch #41 tape to
prevent bleeding of adhesive.
3. For very precise editing turn Function Knob
to "Play" position and push in Instant StopButton. Turn
.reels by hand tolocate a single word or sound. Cutor
mark tape at this sound by removing the head covers
and marking tape at the right hand pole face of the
Sound Head.
To Rewind Tape
1. The tape may be rewound at any time by
moving high speed lever (105) to the left. In so doing,
the tapeon the take-upreel istransferred tothesupply
reel.
2. By moving the high speed lever back & forth
(betweenrewind & neutral) the tapecan be inchedalong
to the number previouslynoted on the index counter.
3. After reaching the desired portion of the tape,
move the high speed lever to the middle or neutral
position to stop all movement of the tape.

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To Play Back Recordings
1. Move high speed lever (105) to the left and
wind tape back to the original counter setting. Return
high speed lever to the center position to stop the reels.
2. Turnthe Function Knohto "Play"positionand
adjust volume and tone controls to the desired listening
leveI.
Fast Forward
1. Any portion of a recording may be skipped,
or any selection may be located in a few seconds by
moving the high speed lever (105) to the right. A few
seconds of "Fast Forward" is equivalent to several
minutes of playing time.
2. By moving lever (105) back & forth, the tape
can be inched along to an exact point.
3. After reaching the desiredportionof the tape,
move the high speed lever to the middle or neutral
position to stop all tape movement.
Connecting To Hi-Fi Systems
1. The recorder can beconnected toHi-Fi sys-
Figure 6.
TIPS ON RECORD ING WITH A MICROPHONE
tems by using Revere Hi-Fi cables (see Auxiliary
Parts List).
2. To connect for recording, plug a Hi-Ficable
between tfie recorder's input jack and the jack of an
amplifier marked "Detector", "Tape", "Recorder In-
put", or "Pre-Amp Output".
3. To connect for playing a tape, plug a Hi-Fi
cable between the recorder's rear output jack and
the jack of an amplifier marked "Auxiliary", "T\I',
"Tunert', or "lV Inputt'.
4. While tape is playing set the recorder's tone
control so that the black dot on the top plate assembly
is opposite the blank space between treble and bass;
set the volume control to flash the normal half of the
indicator. Thereafter, adjust the Hi-Fi amplifier
volume & tone to desired listening level.
To Use As Public Address System
1. Insert microphone plug into the Microphone
P.A. Extension Cord. PIug Extension Cord into the
recorder's input jack.
2. Turn Function Knob to "Stop" position and
adjust volume & tone controls to desired listening level.
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In recording, the most satisfactory results are
obtained when the microphone is held about one foot
from the mouth. The microphone should notbe placed
on the same table with the recorder, or on a piano or
radio,as it may pick upvibrationsand producea noisy
recording. The pre-setting of the record level with
either microphone or radio will be more accurately
set if the tone control is placed in treble. In monitoring
with the recorder's speaker, the microphone must be
kept as farfrom the speakeras possible. Bestresults
wiII be obtained if the speaker and microphone are in
separate rooms. Feedback and howling will occur if
this precaution is not taken.
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Page 7

Figure Z.
D I SASSEMBLY I NSTRUCT IONS
To Remove Main Top Plate Assembly
This is done to expose most of the tape transport
mechanical assembly. On Model TR-1200 remove two
screws from Radio perforated top plate before attempt-
ing to remove Main Top plate Assembly.
1. PulI "up" to remove plastic Function Knob
(15), on-off Volume Control Knob (12), Tone Control
Knob (13), Volume Control Nameplate (14), and Rear
Head Cover (3). Remove High Speed Knob (9) by re-
moving its rear scr-ew. Remove Dual Speed Control
Knob (11) by removing its top retaining screw.
2. Remove the following screws: Two phillips
head wood screws in front of the control panel, one
screw above High Speed Knob, and five screws between
the reel spindles.
3. Press the Instant Stop Button, and pry Top
Plate Assembly "up" starting at the rear.
To Remove Recorder From Case
1. Remove large Phillips head screw with cup
washer below Output Jack at rear of case.
2. Remove two small phillips head screws at-
taching rear nameplate.
3. Remove fivelarge Phillips headscrews near
the right and left sides of the bottom Tube Replacement
Grille.
Page 8
4. Lift the unit carefully up out of the case.
Length of speaker cable permits speakers to remain
with case.
5. Unplug speaker cable.
To Remove Amplifier From Mechanism
This is done to expose amplifier parts.
1. Unplug head plug and motor plug. Both are
Iocated on the bottom of the amplifier chassis. (See
Fig. s ).
2. Remove speed Change switch arm (1bb), see
F.ig. 4 by removing its large phillips head screw (1b6).
3. Remove three large phillips head screws (B
used in Model T-1100 and 2 used in Model TR-1200)
on the right eompartment panel. The first of the four
(4 used in Model T-1100) or the first of the three (B
used in Model TR-1200) need not be removed.
4. Remove two nuts holding left side of ampli-
fier chassis to mechanism. Nuts are located r:nder
wire clamps, near motor (169). See Tig. g.
To Service Radio Tubes (Model TR-I200)
fl,adio Tuner tubes can be checked or replaced
without removing the recorder from its case by re-
moving two small Phillips head screws from perforated
top plate.

Figure 8.
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To Service Amplifier Tubes
The Amplifier tubes can be checked or replaced
PREL IM I NARY TESTS
TEST PROCEDURE: FAILURE TO PASS ANY OF
THESE TESTS IND ICATES A FAULT THAT SHOULD BE
REMED IED .
1. Remove front and rear plastic head covers
(3 & 4) by pulling "up". Clean head (94), tape guides,
and capstan with alcohol.
2. Turn Function Knob (15) to "Stop" position,
place high speed lever (105) in the middle or neutral
position, and turn power "on".
3. Thread tape on recorder. Brakes should be
engaged. Pull required on reel should not distort the
tape and shouldoffer sufficient drag to preventspilling
of tape. Drop tape into threading slot. Attach free
end to take-up reel (right). Reel should rotate freely
counterclockwise and drag when rotated clockwise.
4. Turn Function Knob to "PIay" position.. Felt
pressure pads should press square against tape and
cover shinypole face areaunder tape. Pressure roller
(53) should contact capstan and tape should move past
the play-record-erase head atplaying speed. Take-up
reel should wind up tape as it passes capstan. The
counter should tally each revolution of the supply reel.
5. Move highspeed Ieverto theright (Fast For-
ward) or left (Rewind) andcheck to see that the Function
Knob is automatically returned to "Stop" position;
without removing the recorder from its case by re-
moving six Phillips head screws from the case bottom
grille.
REPA I R PROCEDURE
pressure roller and pressure pads should also be re-
leased. Tape should move in either direction at a
greatly increased speed.
6. Returnhighspeed lever tothe middle orneu-
tral position. Tape should stop without spilling or
breaking.
7. Connect microphone and prepare to make a
microphone recording. With tone control in treble,
adjust volume control while speaking sothat "Normal"
half of indicator flashes and "Distorted" half does not.
While holding the Record Lock Button in the depressed
position, turn Function Knob to "Record". Turn speed
change knob to make recordings at both speeds.
8. Rewind tape by moving high speed lever to
left. The Function Knob should automatically return
to "Stop" position, thus re-setting the Record Lock
Button.
9. Playbacktherecordingatbothspeeds. Check
the volume,tone, andoverall quality. Amplification at
full volume should be sufficient, on a normally recorded
tape, to deliver approximately 5 watts output.
10. Press Instant Stop Button while recorder is
in either "Play" or "Record" position. Tape should
stop instantly. Upon releasing Button, tape should start
instantly and not spill off the reels.
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Page 9

@-______ri
A PHOTOFACT "EXPLODED" VIEW
@Howarii V. Sa.s & Co., lnc' 1958
Page l0
Figure 9. Exploded View 0f Tape Transport Mechanism.

STEREO HEAD ASSEMBLY
USED IN MODEL TR-IIzO
A PHOTOFACT "EXPLODED' VIEW
@ Howrrd \(/. Sams & Co., lnc. lg58
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Figure 10. Exploded Vlew 0f Upper Plate Mechanism Sub-Assembly.

11. Rewind tape and re-record over previous
recording. AII trace of previous recording should be
erased on the portion of the tape re-recorded. Check
irregularities in playing speed (wow and flutter).
12. With the Function Knob in either "Record"
or rrPlay" functions, turning "off" the volume control
should trip the Function Knob to "Stop".
Replacing Pressure Pads
Felt pressure pads (see Auxiliary parts List)
may be glued on with household cement without re-
moving pressure pad arms (96 & g?). pads should
cover shiny pole faces of head, and the side of pad
touching head should be free of cement.
Replacing Sound Head
1. After removing head spring retainer (92),lift
head & brass alignment plate from head shield cup.
Unplug head cable pluq.
2. Pry head from brass alignment plate. Note
position of locating pins.
3. Place the head over the pins in the aligning
plate in the proper location and press into place.
4. Replace alignment plate into head cup. The
two brass pivot studs should engage the two holes in
the plate. Replace head retaining spring.
5. Alignheadazimuth as describedunder "play-
Record-Erase Head Azimuth Adjustment".
Play-Record-Erase Head Azimuth Adjustment
It is very important that the head be lined up
perfectlywith the tape. If it is not,Iow outputand loss
of high frequencies wiII result. There is one adjust-
ment to be made, which is as follows:
1. For alignmentofthe PIay-Record-Erase Head
a 1 mil alignment tape should be used. Thread tape
onrecorder and setcont-rols in "Play"position. Adjust
head for maximum playback sensitivity by turning ad-
justment screw (Item 100 on Figure 10). In lieu of'
alignment tape, play a previously recorded tape and
adjust head for maximum treble tone. After adjustment
is made cement alignment screw (100) to lock adjust-
ment.
Bias Adjustment
The bias is measured by placing a 100 ohm re-
sistor in series with t}re record element and measuring
the voltage across this resistor with a meter capable
of accurately reading .175 volts at a frequency of 40KC.
Adjustment is made by means of tle screwdriver ad-
justing slug onoseillator coil (L1). This screwadjust-
ment is located near the rear of the left side apron of
the amplifier chassis. The above value of bias will
produce optimum results on most types of standard
tape presently available.
Hum Balancing Adjustment
Hum control (R2) is provided to assure maximum
signal to noise ratio. This control has been factory
adjusted for optimum performance. If adjustment is
required, screwdriver adjusting control is accessible
through hole from bottom of amplifier chassis near
head socket. Proceedwith folloriing tominimize hum:
1. Reverse power plug for minimum hum.
2. Turn Function Knob to "Play" position and
adjust hum control (R2) for minimum hum at speaker,
volume set at maximum.
3. For stereo pre-amp hum adjustment used in
Model T-1120 turn recorder "on" and place Function
Knob in "Play" position. Set volume control "up" on
external auxiliary amplifier and adjust pre-amp hum
control(R45) for minimum hum. The pre-amp hum
adjustment is accessible by removing the bottom tube
replacement cover.
ADJUSTMENTS
CLEAN ING
LUBR ICATION
The majority of defects, other than wear or break-
age, can be traced to dirty surfaces. Theplay-record-
erase head (94) capstan and pressure roller (bB) are
subject to an accumulation of tape coating residue,
which is worn off the tape as it passes these parts.
This accumulation should be periodically removed
since it willcause faint recording and poorplay-back.
Wipe off the above surfaces carefully with a clean cloth.
If dirtis cakedor hard and will notcomeoff with adry
cloth, dampen cloth slightly with alcohol.
AII moving parts are permanenily lubricated.
Under normal use no further lubrication is necessary.
In heavy duty service, the following parts should be
lubricated once a year with a drop of #10 motor oil:
1. The top and bottom motor bearings.
2. The top and bottom flywheel (124) bearings.
3. Pressure roller (b3) bearings.
Page 12
4. AII idler ancl clrive wheel bearings.
5. The reel spindle bearings.
The basic rule is - do not over lubricate. Oil
must be keptoff all rubber idlerg beltg andperiphery
of flywheel and off parts tbat might transfer oil to them.
Always wipe excess lubricant from parts that have been
lubricated.

MECHANICAL TROUBLES
No Tape Drive ln "Play" 0r "Record',
1. Pressure roller spring (aOA) disconnectedor
broken, resulting in pressure roller (53) not being held
in contact with thecapstan. Connect or replace spring
(46A)
2. Motor pulley (131) Ioose on motor shaft.
3. Idler tension spring (81 or 12?) disconnected
or broken,thereby not holding idler wheel (110or 126)
in contact with motor pulley (131) and flywheel (124).
Connect or replace springs (81 or 12?).
4. Take-up belt (123) stretched or not properly
connected.
5. Check for oil on motor pulley (131), idter
wheels (110 & 126), flywheel (124), and take-up belt
(123). If necessary,clean with alcohol. Check forany
t4pe wound around capstan.
No "Fast Forward" (Check "Fast Forward" With
Nearly Full Take-Up Reel)
1. Check high speed lever (105) to see if it moves
approximately 1/8" to the right. This should allow
idler wheel (107) to be pulled by its spring (89) into
contact with high speed cup (42) and flywheel (124). A
weak spring (89), binding slide (90), or bent arm may
prevent this.
2. With tape speed selector in 7 Lk ips position,
flywheel idler slide (85) must be free to slide ? 1/2
ips speed idler wheel (110) into contact with motor
pufley (131). Check tension on fast speed idler spring
(8 1).
3. With tape speed selector in 3 3/4 ips position,
3 3/4 ips idler wheel (126) should make contact with
motor pulley (131). Check tension on slow speedidler
spring (12?).
4. Check foroilondrivesurfaces. If necessary,
clean with alcohol.
5. Pressure pads & pressure roller (53) should
be disengaged.
6. Check rewind spindle to see that it rotates
freely. Brakes should be disengaged and rubber tire
(34) on rewind spindle (33) should not contact motor
pulley (131).
No "Rewind", 0K In "Play" And "Fast Forward"
1. High speed lever (105) should move approxi-
mately 7f8" to the left. Rubber tire (34) on rewind
spindle (33) should contact motor pulley (131).
2. Check take-up spindle for free rotation.
Brakes should be disengaged, and idler wheel (10?)
should not be driving high speed cup (42).
3. Rewind arm spring (39) loose or broken. Re-
place.
Tape 0verruns 0r Spills When Changing Functions
1. Brake arm spring (17) disconnected or broken
Connect or replace spring (17).
2. Brake roller springs (20 or 2?) broken. Re-
place defective spring.
3. Clutch felt (113) may be worn. Replace.
4. Check for grease or oil on all driving sur-
faces.
Speed lrregularities (Wow And Flutter)
Check for binding in the following:
1. Flywheel (124) oearings. Check by moving
flywheel tuive idler wheel (110 or 126), depending on
which speed is selected, and fast forward idler wheel
(10?) away from the flywheel; rotate the capstan by
hand. A small fuag is normally obtained from belt
(123).
2. Pressure roller (53).
3. Check all idler and drive wheel bearings.
4. Checkleftandrightreel spindles. The brakes
should be disengaged or held away before turning
spindles.
5. Motor bearings. Check by turning shaft by
hand.
Check to see that:
1. Supplyreel is freetorotateand is notscrap-
ing top plate.
2. Rubber tire (34) on rewind spindle (33) touch-
es motor pulley (131) only when in "Rewind" position.
3. Brakes are released.
4. Pressure roller (53) is making good contact
with capstan.
5. Capstan is clean.
Check for irregularities :
1. Idler wheel surfaces.
2. Pressure roller (53) surface.
3. Take-up tension. Take-up clutch can be
checked by holding right spindLe while recorder is in
"PIay"position. The tension should be smoothwithout
any pulsations. If surface of take-up clutch felt (113)
is gummy, it must be replaced.
I nsufficient Tape Take-Up
1. Increase take-up by adding another washer
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Page 13

2. Clutch felt(113)may beworn. Replaceclutch
felt.
Tape Squeak
Tape squeak iscaused by faulty tape with insuf-
ficient lubrication. Tape squeaking is accentuated by
high temperature and humidity. Squeaking can be min-
imized by:
1. Cleaninghead andpressure pads withalcohol.
2. Slightly decreasing pressure pad spring (98
or 99) tension.
Fails To Record
1. Pressure pad spring (98) weak or broken re-
sulting in the pressure pad not holding tape firmly
against erase element. Replace spring (98).
2. Pressure pad worn or missing. Replace
pressure pad.
3. Check for dirton erase head element. Clean
with alcohol on a.soft cloth.
Fails To Erase
1. Pressure pad spring(99)weak or broken re-
sulting in the pressure pad not holding tape firmly
against the record element. Replace spring (99).
2. Pressure pad worn or missing. Replace.
3. Check fordirtonrecord headelement. Clean
with alcohol on a soft cloth.
Pressure Pads Do Not Disengage ln "Stop" Position
1. Checkpressure roller (53) arm linkageunder
sound head shield cup.
Tape Counter Sticks
1. Counter sticking is usually caused by a de-
fective counter (145) and not by slippage of tape counter
drive belt (35). Check counter.
"Stop" Position
Recor*playback-erase head disconnected. Pre-
amp, 12AX7(V1), connected toinput jack. Tonecontrol
is functioning. Driver 6S4(V2) used in Model TR-1200,
or 6C4(V2) used in Model T-1100 disconnected. In
Model TR-1200 amplifier output is connected to speaker
without the.insertion of a plug into the input jack. In
Model T-1100 insertion of a long plug must be made
before amplifier output is connected to the speaker.
"Record Position"
Record-playback head connected to the ampli-
fier output. Pre-amp, 12AX?(V1), connected to input
jack. Tone Control is disconnected. Driver 6S4(V2)
used in Model TR-1200, or 6C4(V2) used in Model
Page,l4
Function Knob Does Not Return To "Stop" When
High Speed Lever ls Moved 0r When Volume
Control ls Turned "Off"
1. Check forbinding inall linkageseonnected to
the mechanism control shaft, In particular, check for
binding in theamplifierfunctionswitch (M4). Tocheck
this, Ioosen set screw from function switch cam act-
uator (157) and slide upward on control shaft (b0).
Thereafter see if mechanism acts normal. Binding
in the amplifier function switch may be caused by the
switch shield rubbing against the slide switch. In some
cases excessive friction in the function switch can be
reduced by lubricating the switchcontacts rvith a non-
oxidizing lubricant.
2. If turning the volume control to "off" does
not trip the Function Knob to "Stop" position, check to
see if the pin at the bottom of the volume control knob
is tripping function cam pawl (63).
Function Knob Cannot Be Turned To "Play" Position
1. Spring (66) disconnected or broken. This
spring must be connected as shown in Figure 2. If
not, the Function Knob cannot be placed in the "Playt'
position.
Function Knob Will Not Stay ln "Play" 0r',Record',
Position
1. Spring (5?A) disconnected or broken. This
spring must be connected as shown in Figure 2. If
nct, the Function Knot will return to "Stop" position
when placed in the "Play" or "Record" position.
Faulty lnstant Stop
1. While Function Knob is in "Play" position,
cheek that the instant stop brake (18) comes in contact
with the rewind spindle tire (34) the instant the pres-
sure roller (53) starts moving away from the capstan.
Slight adjustment can be made by bending fire instant
stop arm linkage to the instant stop spring (24).
T-1100 connected to operate as a bias-erase oscillator.
In Model TR-1200 amplifier output is connected to
speaker through a 10 ohm muting resistor with noplug
insertion into the input jack necessary. In Model
T-1100 insertion of a Iong plug is necessary before
the amplifier outputconnection is made to the speaker
through the 10 ohm muting resistor.
"Play" Position
Record-playback head connected to the pre-
amp, 1ZAX?(Vl). Tone control is functioning. Driver
6S4(V2) used in Model TR-1200, or 6C4(V2) used in
Model T-1100 connected as a driver between pre-amp
12AX?(V1) and output stage 6V6GT(V3). Amplifier
output is connected to speaker.
AMPLIFIER FUNCTION SWITCH OPERATION (ELECTRICAL)

ETICTRICAL TROUBLES
Weak "Playback" Volume 0r No High Frequencies
0n Known Good Recordings
1. Check for dirty head (94). Clean head with
alcohol. (The plastic head covers, front and rear of
threading slot, are removed by prying "up").
2. Checkpressure pads. See paragraphon"Re-
placing Pressure Pads", page 12. ..
3. Wrong type of tape or wind (dull side of tape
should be wound I'in" - "A" wind).
4. Check head azimuth adjustment, page 12.
5. Head may be worn badly or need replacement
(see "Replacing Sound Head", page 12.
Recorder Dead, Pilot Light (M3) Off
1. Check fuse (M1). Cause of blown fuse may be
shorted 6X5GT(V4) or unit plugged into D.C. or 220VAC.
2. Check power transformer (T1) for short or
open.
3. Check power cord and "on-off" switch onvol-
ume control (R1B).
Dead "Playback", Appears To Operate Properly l n
"Record" (Record Level Indicator Operating)
1. Check output jack (M?), speaker socket (M8),
and speakers (SP1 & SPz).
2. Check for mal-functioning of function switch
(M4) contacts.
3. Check fordefectivehead(94). A screwdriver
rubbed over the playback element (right element) with
volume control set at maximum shouldproduce a sound.
No Monitoring 0r P.A. 0f Sound When Signal ls
Fed lnto lnput Jack Using Standard Phone Plug
(Function Knob ln "Stop" For P.A. And ln
"Record" For Monitoring) Unit Functions Properly
0n "Playback"
1. Check input jack switch contacts. In Model
TR-1200 a long plug inserted in the input jack should
short out the input from Radio Tuner Sub-Assembly
and simultaneously switch the speaker ',on" for P.A.
in "Stop" position or for Monitoring in "Record"
position. In a like manner, with the exception of
shorting out of radio tuner input, speaker is switched
"on" in Model T-1100.
No Sound From Radio (Model TR-1200) Function
, Knob ln "Stop" Position (Unit Functions Properly
ln "Playback")
1. Check to see that there is no plug inserted
into the recorder's input jack.
2. Check input jack switch contacts.
3. Check function switch (M4) contacts.
4. Check radio tubes (V5-V?), resistancechart,
& operating voltages. (See schematic diagram, page
1?).
Weak 0r Distorted "Record, " "Playback" 0n
Pre-Recorded Tape 0K
1. Check biaserase oscillator coil (Ll) second-
ary for approximately 30 volts @ SSXC. Normal bias
cument is 1.75 milliamps.
2. Check input jack and function switch (M4)
contacts. Normal speech 1ft. from microphone should
flash tfie "Normal" half of the indicator.
3. Check microphone or other input source.
Failure to push plug firmly all the way into jack will
cause distortion.
Recording Level lndicator lnoperativg "Records" .
And "Plays" Properly
1. If indicator (M2) is dead, lamp may be loose
or record level indicator circuit defective. Check
(c24), (R2?), (R28), & (R29).
2. If indicator always glows (C24) may be short-
ed, (R28) changed value or open, or amplifier may be
oscillating.
Records Backgrou nd Hum,
Hum Lower 0n Pre-Recorded Tape
1. Check all tubes (Vl-V3) for heater tocathode
leakage; also check (C1) & (C2).
2. Check input shield wiring to see if grounded.
3. Record fromanother microphone, radiq ete,
to see whether hum comes from an outside source.
Hum 0n "PlaybacK',
Falls Off With Decrease ln Volume Control
1. Minimize hum as outlined under "Hum Balano-
ing Adjustment" on page 12.
2. Moverecorder awayfrom hum fieldssuch as
fluorescent lamps, amplifiers, etc.
Microphonic Howl ln "Play",
But Dies Out When Volume ls Lowered
1. Try different 12AX?(V1) in pre-ari.rplifier
stage.
No "Erase, " Records Over Previous Recordings
1. Check for,dirt on erase head element and
check pressure pads.
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2. Check biae-erase oacillator. coit.(Lt) aB dis- NO SOUnd NeOn BUlbFlaSheSWhen playingA
cus8ed prevlously under "Weak Or Distorted Record". ^-, ,;_
check 6b4 or 6ci(v2) bias oscili;to;:;il.***- ' Recorded Tape
3. check erase head co for open or ehort. l. check futrction svitch (M4) contacts.
Excessive Erase, Tape Burns when Remote Control 2. check speaker jack swrtch contact.
ls Used
1, Adjust bias for.1b volts or ress (see page 12 3' check transformer (T2) secondary for open'
I'Bias Adiustment"). q. Check connecthg cables, iacks, plugs, etc.
6BE6 c -6 64 C 6AV6
Figure ll. Top View - Radio Tuner.
455KC
tANT
500Kco5c
t620KC
Page 16
Figure 12. Bottom View - Radio Tuner .

TUNING RANGE _BROADCAST 540-162OKC
get Functlon Swltch to 'tstop" po8ttlon.
Make ce"tatn that no plug is inserted in recorder lnput jack.
Volume control should be at maximum position. Output of eignal generator should be no higher than necegsary to obtain an
output reading. Use an tnsulated allgnment ecrevdrlver for adjusting.
DUAAAAY
ANTENNA SIGNAT
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREQUENCY
RADIO
DIAL
SETTING OUTPUT
METER ADJUST REIviARKS
.01mfd High side to pin ?
(grid) of 6BEO (V5).
Low side to chassis.
455KC
(4004, Mod. Tuning Gang
fully open. Amplifier
output A1,42.
A3, A4 Adjust for maximum output.
Loop 162oKC tl A5 Fashion loop of several turns of wire
and radiate signal into loop of re-
celver. Adjust for maximum output.
600Kc It A6 tt
tt 150oKC Tune to 1500KC
signal. A? Repeat Steps 2, 3, and 4.
POINTER SETTING
Wtth tuntng cap. fully closed, set tuning drum eo that the laet lndex mark is opposite the index mark on top plate of recorder.
2.
ALIGIWENT INSTRUCTIONS (MODEL TR.Iz()O ONLY} - READ CAREFULLY BEFORE AilEMPTING ALIGNMENT
3.
4.
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MEASURED IN '' RADIO" POSITION A PHOTOFACT STANDARD NOTATION SCHEMATIC
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RESISTANCE READINGS
TEM TUBE Pin IPin 2Pin Pin 4Pin 6
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Figure 13. Schematic - Radio Tuner.
Page 17

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