CONCORD 103 User manual

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GTNERAL INFORMATION
The Concord Modei 103 is a three-speed, dual-track tape recorder.
Recordings can be made directly from a microphone and from a radio, phonoglaph, or
television receiver.
The three tape speeds are I 7/ 8, 3 3/4 and 'l l/ 2 ips. The playing and recording time
using both tracks are as follows:
ReeI Size
3" (300 fr. )
5 " (600 ft. )
l7l8lps
I hour
2 hours
3 3/4 ips
l/ 2 hour
I hour
Indianapolis 6, Indiana.
oATt 7 -61
Printed in U.S. of Amerlca
7I/2ips
1/ 4 hour
V 2 hour
Connect recorder to an outlet supplying U0-120 volts, 60 cycles AC only. Before con-
nectj.ng to line supply, be certain it agrees with these speciJications.
Supplied By:
Concord Eleclronics Corp.
I 549 North Vine Street
Los Angeles, California
,\Y
HOWARD W, SAIUTS &
The li.stj.ng of any available replacement part herein does
not constitute in any case a recommendation, warranty or
guarantyby Howard W. Sams & Co., Inc., as to the quality
and suitability of such replacement part. The numbers of
these parts have been compiled from inlormation furnished
to Howard W. Sams & Co., Inc., by the manufacturers of
cQ480
GO.r I ll|c. !ndianapolls 6, lndiana
the partj.cular type of replacement part listed. Repro-
ductlon or use, without express permission, of editorial or
pictorial content, in any mamer, i8 prohibited. No patent
liability is agsumed vith re8pect to the ue ol the lnforma-
tioncontainedherein. @ 196t Hoverd w, sams & Co. , Inc.,
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2-
Remove the lid f rom the case.
Remove the AC cord and accessories from the
accessory bag.
3. Plug the AC cord into a convenient outlet of
PREPARI NG FOR OPERATI ON
FUNCTION OF CONTROLS
OPERATI NG I NSTRUCTIONS
proper power rating.
4. Recorder is now ready for use. Before oper-
ating, the operator should familiarize himself
with t}te function of the controls.
0n-0ff -Volume
Turn knob clockwise to turn the power on to the
unit. Further rotation increases the volume during
playback. When recording, it controls the recording
leveI.
Sel ector
l. The tape motion is stopped when the Selector is
in the "Stop" position.
2. Turning the Selector counterclockwise places
the unit in "Rewind" position.
3. Turning the Selector clockwise from the Stop
position places the unit in "Forward" or Play
position.
4. To Record, pull the 'RECI' lever toward you,
then turn the Selector control to the 'Forward"
position. ("REC. " lever is located to the right
of Selector knob).
Fast Forward
Turn Selector to Forward (Play) position and
then move the Fast Forward lever toward the front of
the case to advance the tape rapidly.
Quick Stop
When the lever is pulled toward the front of the
case it will stop the forward motion of the tape tem-
porarily without turning off the amplifier or motor
circuits.
REC. Safety
To record, move the REC. Safety Lever toward
thefront of the case before turningthe Selectorcontrol
to the Forward position. This is a Safety Lock to pre-
vent the recorder from being placed in the Record
position accidental.ly.
Speed Selector
To place the unit in 7 l/ 2 ips speed, move the
selector toward the rear of the recorder. For 3 3/ 4
ips speed, move the lever toward the front of the
recorder. For L7/ 8 ips, Ieave the selector in the
3 3/4 ips position. Remove the 7I/ 2 ips capstan
roller (115) and place it on the capstan holder.
N0TE: Replace the capstan roller on the cap-
stan when recording 3 3/ 4 ips or 7 L/ 2 ips.
Earphone Jack
The Earphone may be plugged into this jack for
monitoringa recording orfor listening tothe playback
of a recording.
"Ext. " 0utput Jack
This jack is provided for playing the recorder
through an external speaker, radio, or Hi Fi ampli-
fier.
"Aux." Radio-Phono lnput Jack
This jack is used when recording from a radio,
phonograph, or TV.
"Mic. " lnput Jack
This jack is used when making recordings with
the microphone.
Threading the Tape
l. Movethe Selector control tothe "Stop" position.
2. Place a reel of tape on the left-handreelspindle
(76).
3. Place an empty reel on the right-hand reel
spindle (15).
4. Unwind about 12" of tape from the reel. Hold a
section taut and insert it in the tape slot. Make
sure the dull-coated side faces the rear of the
recorder.
Page 2
5. Insert the free end of the tape into one of the
radialslots ofthe right-hand spindle reel. Turn
the reel several turns counterclockwise to
fasten the tape to the reel and to take up slack
between reels.
Recording f rom Microphone
Rotate the On-Off -Volume control clockwise to
turn the recorder on. Allow suJficient time for
the tubes to warm up.
Insertthe microphone plug into the 'Mic. " jack. fr
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3. Set the speed selector for the desired speed
7I/2,33/4, orLT/ 8ips.
4. PulI the 'IREC. " lever toward the front of the
case and move the Selector control to the For-
ward position.
5. Hold the microphone about 6 to 12 inches from
the mouth and speak in a normal voice.
6. Adjust the Volume control until the level indi-
cator flashes on the loudest passages.
N0TE: Correctvolume levelduring a recording
is very important. Too weak a signal will
resultin weak playback andhigh background
noise. Too strong a signal will result in
distortion during playback.
Recording f rom a Radio, Phonograph or Television
Receiver
Connect the patch cord supplied with the re-
corder as follows:
l. Connect the alligator clips across the voice coil
terminals of the radio, phonograph, ortelevision
receiver.
2. Insert the patch cord plug into the Aux. jack.
3. Follow steps I thru 4 under 'Microphone Re-
cording".
Recording f rom Cartridge
l. Magnetic Cartridge:
(a) Connect theoutput of the cartridge to a pre-
amplifier.
(b) Connectthe preamplifier outputto the'Aux'.'
jack of the recorder.
(c) Follow steps I thru 4 under "Microphone
Recording".
2. Crystal or Ceramic Cartridge:
(a) Connectthe cartridge leads through the patch
cord to the "Aux. " jack of the recorder.
(b) Follow steps I thru 4 under "Microphone
Recording".
Dual Track Recording
This recorder will record and play on one-half
thewidth of the tape at atime, resulting in atwo-track
recording. After the first recording is completed,
remove the full reel f rom the right-hand spindle, turn
the reel over and place it on the left-hand spindle.
Page 3

Then make another recording. The tape canbe played
back in the same manner.
Rewind
To rewind the tape at a rapid speed turn the
Selector control to Rewind position.
To Play a Recording
l. Thread the tape as described under 'Ifhreading
the Tape".
2. Turn the Selector control to the Forward (Play)
position.
3. Adjustthe volume to the desired listening level.
To Erase a Recording
Any recording on tape is automatically erased
before a new one is made when inthe record position.
To erase a recording without putting new material on
the tape, follow the normal recording procedure but
set the volume control to the full counterclockwise
position.
To Edit and Splice Tape
NOTE: It is impossible to edit and splice one
track tapewithout effecting the other. Re-
cordings to be edited should be limited to
one track recordings only.
l. Tape maybe edited bycutting out unwanted por-
tions, or by joining selections into anotier
sequence. Announcements can be inserted be-
tween selections, etc. Unused tape can be
spliced for reuse.
2. For best results, cut tape at a slight diagonal,
butt ends together and fasten on the glossy side
with splicing tape. Trim off any excessive
width.
To Remove Recorder from Case
l. Remove all control knobs.
2. Remove head covers (4 & 5).
Remove thefour rubber feeton the bottom ofthe
case.
Li{t the bottom cover from case.
CLEAN ING
The record head (ll0), erase head (126), capstan
(lI5), pinch rouer (U4), and tape guides (f06) shoufd
be cleaned occasionally to remove the tape residue
which is worn off the tape as it passes these parts.
Use a soft cloth and alcohol to remove the residue.
Clean the rubber tired idler wheels and belts
with alcohol.
Remove one long brass colored phiJ.lips head
screw from front part of the chassis.
Remove three other phillips head screws from
chassis.
LiJt recorder from case.
To reassemble, reverse the foregoing proced-
ure.
DISASSEMBLY
5.
6.
t-
B.
3.
4.
LU B RI CATI ON
All rotating parts are provided withoilite bear-
ings and are lubricated before leaving the factory.
Under normal use, nolubricationis requiredfor along
period of time. When lubrication is necessary, use a
good grade of oil sparingly.
When lubricating the flywheel bearing, remove
the capstan (ll5) and inject 4 or 5 drops of oil.
ADJUSTMENTS
ldler Wheel
Toadjust the idler wheel pressure, setthe speed
selector to 3 3/4 ips. Hook a spring scale to the end
of the idler lever (89) and pull until the idler is liJted
away f rom the motor pulley. The spring(61) should be
adjusted so that there is between 9 and 12 ounces of
pufl.
The idler wheel height is adjusted by moving the
motor pulley up or down as required. In the 3 3/ 4 ips
position the distance between the lower surface of the
idler wheel and the step of the motor pulley should be
3/ 32". In the ? L/ 2 ips position the distance between
the upper sur{ace of the idler wheel (85) and the step
of the motor pulley (139) must be around L/ 32".
Tape Speed and Pinch Roller
(a) Tape Speed - Set the Speed Lever to 7 L/ 2
ips, and theSelector control tothe Forward
position. Adjust the hex nut (129) clockwise
to increase speed, and counterclockwise to
decrease speed.
After adjustment is made, check the L 7/ I
and 3 3/ 4 ips speeds.
(b) PinchRoller - Tocheck the pressureof the
Pinch Roller (ll4), set the controls as de-
scribed under 'nlape Speed".
Measure the tension of the pinch roller by
hanging the hook of a spring scale to the
pinch roller sha.ft, pull on the scales until s
Page 4

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the pinch roller (Il4) is lifted away f rom the
Capstan (ll5), the tension should be between
I and 2 pounds.
If adjustment is necessary turn the hex nut
(I29) clockwise to increase tension and
counterclockwise to decrease tension. If
adjustment was made, the 'Tape Speed Ad-
justment" must be checked.
Pressure Pad
Setthe Selector control toForward Position and
turn the Fast Forward lever to Fast Forward.
Adjust the position of t}re pressure pad retainer
(128) bV turning retaining screw (134) so the proper
distance between the f ront sur{ace of the pads and the
heads (ll0 and 126) is L/ 4". Tighten hex nut (133).
Adjust the angle of lug (124) so pads are parallel
to the heads (lI0 and 126).
Record Switch Arm
When the Recorder is in the record mode the
record switch arm (62) is locked against the switch
lock arm (52).
The distance between the outer edge of the re-
cord switch arm (62) and the switch lock arm (52)
protrusion, should be about L/ 64 to 3/ 64 inch.
Adjust screw (68) Iocated on the switch lever
(69) and lock it in place with the adjustment nut.
Play-Record Head
Thread agoodprerecorded tapeon the recorder.
While playing back, adjust the head mounting
screws for the proper position of the head which will
give maximum output. The adjusting screws must be
tight when adjustment is completed.
Erase Head
The erase head (126) should be adjusted so that
it effects just the top half of the recorded tape.
This adjustment should be made in Record posi-
tion. Loosen the erase head adjusting screws, and
adjust head to aposition where only the top half of the
tape will be erased. The adjusting screws must be
tight when adjustment is completed.
Record Bias Adjustments
Set the Selector to Record position and tape speed for
3 3/ 4'". Adjust Al for 45 volts Rn[,S aeross the
Recordr/ Play head.
Bias Frequency Adjustment
Set the Selector to Record position and adjust A2 for
bias frequency of 30KC + 2KC.
Record Level Indicator Adjustment
Inject a 1000 cycle signal into either Input jack with
the Selector set to Record. Adjust R2 until the neon
lamp lights with Il to l5 volts of signal level at pin 6
(plate) of V2 (I2AUT).
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Page 5

TROUBLE CHART
Symptom Cause Remedy
Tape Speed too fast. l. Voltage seleetor plug in wrong 1. Insert plug in ll?V jack.
jack.
2. Frequency selector plug in 2. Insert plug in 60 cycle jack.
wrong jaek.
3. Pinch Roller spring (132) mis- 3. See "Pinch Roller Adjustment"
adjusted. under "Adjustments".
No Rewind. l. Drive belt (77) broken. 1. Replace drive belt (??).
2. Rewind spring (81) broken or 2. Connector replacerewind spring
disconnected. (81).
3. Motor pulley (139) loose on its 3. Tighten set screw (140) on motor
shaJt. pulley (139).
No Record or Playback. l. 'Play-record head (110) defec- l. Replace Play-record head (ll0).
tive.
2. Pinch Roller Spring (tgZ) ais- 2. Connect or replace Pinch Roller
connected or broken. spring 032).
No Erase l. Erase head (126) defective. l. Replace erase head (126).
2. Erase head 026) positioned 2. Position erase head (126) so it is
wrong. parallelwith thetape when inRe-
cord position.
Rewind spindle brake inop- l. Rewind brake spring (22) dis- l. Connect or replace rewind brake
erative. connected or broken. spring (22).
Takeup spindle brake inop- l. Takeup brake spring (74) dis- l. Connect or replace takeup brake
erative. connected or broken. spring (74).
Selector switch operates too 1. Interlock spring (54) discon- l. Connect or replace interlock
freely. nected or broken. spring (54).
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FIG.3A EXPLODED VIEW OF MECHANISM
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FIG.3A EXPLODED VIEW OF CABINET
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MECHAN ICAL PARTS LIST
I
2
3
4
5
6
7
B
9
l0
ll
12
l3
L4
r5
l6
I7
IB
i9
20
2L
22
23
24
25
26
27
28
29
30
3L
32
33
34
35
36
37
38
39
40
4L
42
43
44
45
46
47
48
49
50
5l
5rA
5lB
52
53
54
55
56
57
58
59
60
6l
62
63
64
65
A-8[52
A-8ll5l
A-81r54
A-8U39
A-81152
A-81153
A-8U54
A-Brr40
A -6?397
A-81055
A-81059-B
A-85151
A-6488?
A-?0048
A-81145
A-700?5
A-65382
A-67464
A-65376
A-48u2
A -48110
A -65385 -A
A-70143
A-7005?
A-65379
R-83603
A-65398-A
A-65380
A-65381
A-6?689
A-65407
A-6540r
A-6?685
A-67687
A-6539?
A-70133-A
A-67682
A-65386
A-65384
A-?007r-B
A -7005?
A-?005?
A-65396
A-654r5
A -?0126 -C
A-65428-A
Fast Forward Lever Knob
Selector Knob
Reeord Safety Knob
Head Cover (Rear)
Head Cover (Front)
Speed Selector Knob
On/ o/if. Volume Control Knob
Quick-Stop Knob
Cabinet
Handle Assembly
ReeI Spindle Screw
Reel Holder
Washer
Lock Washer
Takeup Spindle
Friction Felt
Friction Disc
Friction Spring
Takeup Reel Drive Spindle
"E " Type Retainer
Phenolic Washer
Brake Spring
Takeup Brake Lever
Screw
Shake-proof Washer
Flat Washer
Spacer
Selector Slide
Fiber Washer
Takeup Brake Cam
Washer
Phenolic Washer
Felt Washer
Fast Forward Roller
Phenolic Washer
Felt Washer
Idler Wheel
Fast Forward Roller Lever
Fast Forward Spring
Rewind Spring
Takeup Arm
Rubber Bushing
Screw
Pilot Lamp Retaining Brkt.
Takeup Arm
Stop Lever
Fast Forward Lever ShaJt
Stop Arm
Hex Nut
Retaining Screw
Selector Rod
Selector Cam
Selector Shaft
Switch Lock Arm
Hex BoIt
Interlock Spring
Stopper Screw
Fast Forward Lever
Interlock Arm
Pad Spring
Handle Spring
Record Switch Arm Spring
Idler Arm Spring
Record Switch Arm
Fiber Washer
Fast Forward Turning Spr.ing
Fast Forward Turning Serew
Fast Forward Turning Lever
Switch Lever Spring
Switch Lever Retaining Screw
Switch Lever
Fiber Washer
Retainer
Fiber Washer
"E" Type Retainer
Brake Spring
Rewind Brake Lever
Rewind Splndle
Belt
Separator Lever Spring
Separator Lever
Rewind Pulley
Rewind Spring
Rewind Lever
Screw
Screw
Idler Wheel
Spring Retainer
Speed Selector Spring
Quick-Stop Supporter Lever
Idler Lever
Idler Arm
Screw
Speed Selector Slide
Speed Selector Lever
66
6?
68
69
70
7L
72
?3
74
75
?6
71
?8
79
BO
8l
82
83
84
85
86
8?
88
89
90
9I
92
92A
93
94
95
96
9?
98
99
100
101
r02
103
r04
r05
106
l0?
108
109
u0
lll
Ltz
lr3
u4
ll5
116
Il?
ll8
lI9
r20
TzL
122
123
r24
125
126
127
r28
129
130
l3r
A-?0075
A-65383
A-8U46
A-83063
A-?005?
A-65390
A-48090
A-7005?
A-65400
A-48n0
A-65062
A-70104
A-65434
A-6b3?8
A -653?7
A-65394
A-65395
A-65405
A -65389
A-70057
A-65403
A-65430
A-65368
A-6?688
A-?00?5
A-65404
A-65374-B
A-6?680
A-67393
A-65402
A-67696
A-46030
A-65393
A-6?698
A-676?4
A-48lil
A-68109
A-653?5
A-67684-A
A-65325
A-85490
A-6?686
A -48106
A-46028
A-70r34-A
A -6538?
A-65388
A-65429
Belt Guide
Screws
Quick Stop Connector
Quick-Stop Lever
Quick-Stop Lever Spring
Quick-Stop Lever Holder
Screws
Neon-Lamp Retaining Brkt.
Spring Bracket
Speed Selector Shaft
Stepper Spring
Stepper for Speed Selector
Base Plate
Tape Guide
Capstan Holder
Tape Guide
Tape Guide Spacer
Record-Play Head
Head Retaining Board
Pinch Roller Cap
Capstan Retaining Screw
Pinch Roller
Capstan (for 60 cycle)
Screw
Head Retaining Board
Pinch Roller Lever
Oil Cap
Felt Washer
Flywheel Bearing
Flywheel
Screw
Spring Retaining Lug
Head Screws
Erase Head
Pad Spring
Pressure Pad Retainer
Hex Nut
Pressure Pad Arm
Spring Adjusting Screw
Page 8

Description
A-70122
A-83062
A-67679
Pinch Roller Spring
Hex Nut
Retaining Screw
Shock Absorbing Rubber
Cushion
Shock Absorbing Rubber
Spacer
A-65392
A-48105
Screw
Motor Retaining Board
Motor Pulley
Motor Pulley Set Screw
Motor
Motor Fan
Motor Fan Set Screw
MECHAN I CAL PA RTS L I ST ( CON'T" )
12AU7
I2AU7
35W4
AMP CHASSIS-BOTTOM VI EW
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