3M OMEGA 890-0032-000 User manual

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•
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"OMIEGA"
Technical
Manual
890-0032-000
(5/87)
"Affordable
Performance
You
Can
Trust"
From
'~
The
Leader
in
Reliability
and
Service"
International Tapetronics Corporation/3M
2425
South Main Street
P.
O.
Box
241
Bloomington, Illinois 61702-02
41
3IVI

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Q C OPYR I GHT 3M Co m pa ny 1 987
All R1q h ts R ese r ved
Ma de Un der One Or M ore Of The Fo l lo w1n9 Paten t s :
•1 • Hl 2 . 22 1 ; 4 2 .2 L. .. Ho~ ti , HH '-13 7 4 . I 58 . 8c,cl ; 4 t '--.l :L l 03
"SCOTCHCART" 1 "SC OT CHCART " Brand, S cotchCar t ' 4D a nd
Scotc hC ar t~ II ar e t r ad em arks of the 3M Company ,
St . Pau l , Minne s ota , USA

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•
Preface
International Tapetron1cs Co rporation/ JM man ual s are w r1tLen
with the intent o f assisting the read er/u se ,- towards a better
understand.1ng of Il C equipment. Please rea.d th ro ugt 1 th1s 111an-
ual and fam iliarize yourself w1 th tt1e va t .1 0L1s pr ocectures a nd
test s ne ce ssary t o keep your equipment 1n top op er aL1ng con-
dition. It 1s ad visa b le to keep the nia nual 1n a c-u nv en1e nt
and readily a ccessable area near the machine.
Our te st procedure s ar e designed to allow a dJ us t mPnt f or
a
ccura te and repeatable results while y1el,;i1n•;i perfonna nc·e
within specifications,
Sheu ld you di sco ver any error·s or o,n1ss 1ons, or w1<::t, t o c' om-
ment on the manual or equ1pment, yo ur inp u t will be grea t ly
a ppreciated. Fon•Jard any suggest i ons or- r·ei; orn111encta t 1on:, to
the Te c:hn ical Documentation Coo ,-d1. na t or ; c/ o I TC Te ~hnica 1
Service department .

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Warranty
I ntern at ional T apetronics Corporation/3M
WARRANTY CONDI TIONS: There are no w arranties, expressed or
implied i ncludin g the w arranties of mer c hantability a nd fit-
ne ss for us e, beyond tho se s tated he r ein.
International Tapetronics Co rp or ati o n/3M, here i na ft e r
r
ef e rred to as ITC , warrants its products to be f r ee fr om
defe c ts 1n work manship and mate ria l under nor mal a nd p r o per
u se for the periods specified below . ITC a ssumes no obliga-
tion to repair or re pla c e equipment which has been subJ e ct t o
maltreatment, misapp li cation, exposure or excessive moisture,
imp r oper ma intenence or ins tallation, neg ligen c e or acc ide nt,
or had it s s eri al nu mber or a ny p ar t ther eo f altered , de faced
or r e moved . T hese warranties ap ply on l y to th e ori gi nal use r .
No dealer or agent is auth orized t o make any ot h er or a ddi-
tional guara n ty or warr an t y .
The sol e or · ex clust ve lia bil ity of ITC shall be t o r· eplace or
repair the prod uc t as it may de s ignate. ITC a ss umes no l iab-
ili ty for co n se quential dama ges or fo r any o t he r loss. dama ge
o r e xpe n se, direc tly or i ndire ct ly ar isi ng from the use of
its pr o du cts. In or de r to o bt ai n war ranty s e rvice ITC ma y
r
equi re P urchaser to deliver the i tem to · rrc at P ur chaser ' s
ex p ense.
NEW EQUIPMENT: W arranted to be f r ee fr om defects in w orkman-
s hip and mater i al, and con for m to the sp ecificat io ns r eferred
to or s e t out herein, for a period of t wo (2) years from dat e
of shipm ent .
REFURBISHED EQUIPMENT: Warranted to be free f ro m d ef e c ts in
workman s hip an d ma terial, and co hform to th e s pe c ifi c ati ons
r efer re d t o or set out herein , f or a period o f two (2) y ea r s
from date of s h ip ment .
USED EQUIPMENT: W arranty time-period de termin e d at time of
s
ale .
EQUIPMENT REPAIRS/REPLAC EMENT PARTS: W ar r an t e d t o be f ree
f rom defe c ts 1n workm an s hi p a nd ma te rial for a period of
nine ty (90) days fr om da te of s hipme nt.

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Equipment Return Policy
When reLurn o f ITC equipment or com ponents i s neces sar y,
please use ~he following procedure. These four easy steps
Wlll insure prumpt attention f or your equ1pment.
1. Call the ITC Technical Service Depar tment for r et ur n
authorization and assistance . We m ust know that your
equipment 1s coming an d what the proble m is before we can
help. Unexpected or uniden L 1f1ed equipment returned to us
1s subJeot to deldy. Also, many problems ca n be d ia gno s ed
and reGt1f1ed without actually returning the equipment ,
the r eby sav1n~ you the expe n se of shippi ng and downt1me.
2. Let us Know who you are by writing a brief note li sti ng
the problem, your name, call letters or com p any name,
addr·ess, phone number and wt 10 you spoKe w1. th at ITC.
Enclose this note with the equipment . Also, make SL H"e LhaL
yo11r
rt:lturn address 1-:; v1s1ble on the outs1de of the c.~r -
ton.
3. Package th e equipment secu rel y! IlC is no t respon si ble f or
ship p ing damage. I f possible, us e the origin al packing
m~ te rial. (Replacemen t packing material is av ail able from
I T C. )
4. Ship the equi pm ent, prepaid , via a t rac eable mode of
transportat1on; UPS, a1r express or air freight. Par c el
Post and Air Mail are not t raceabl e. Do not ship col le c t
11nless prio r arrangeme nts have been made . I TC re c ommends
th at you insure your shipment. Our Te c hnica l Service or
Customer Service staff can as s ist with declared values for
1nsurance purposes.
We co ntinual ly strive to make availabl e t he fi ne s t 1n te c hni-
ca l support and service fo r our products. Your help 1n ma K1n9
this possible 1s appreciated.
For Information On Warranty Or Se rv ice. Co ntact ITC At:
International tapetronics
2425 S . Main St., P.O Box 241
Bloomington, Ill1no1s, IJSA 61702-0241
TEL: Toll -Free 800-447-0414; Alaska & Illino is ca ll c ollect ,
309-828 -1 3 81 .
O~ts1de The USA Contact Your Local IT C R epr esentative.

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FCC Radio Frequency Emission Statement ·
WARNIN G: Thi s equipment gene r at es . uses, a nd c an radiate
radio f r equen cy energy, and if n ot i ns tal le d an d used i n
accordance with the instruc tio ns manual, may c au se i nterfer -
ence to radio com munications. It has been te sted and found to
comp ly wi th the l~mit s f or a C la ss A c omputing de v~ce pursu-
ant to S ubpart J of Part 15 of FCC Rules, whi ch a re designed
to p ro v i de r e aso nab l e pr o te ction against such int er fer ence
when op er ated in a commerci a l e nvironment. Ope r ation of this
equipmen t 1n a res iden t ial area 1s l ikel y to cause inter · fe r-
en c e in whi c h cas e the use r a t h is own expense will be
requ1red to take wha tever mea sur e s may be required to cor r ect
the interfe ren ce .

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Table Of Contents
T itle Pae•
Preface
Warranty
Return Policy
FCC Radio Frequency Emission Stateme nt
Sectio n I
Introduction/Specifications
Introduction ....... . .... ..... ...... .... ....... 1-1
Specifications .... .. .......................... 1-2
Section II Installation & Operation
Unpacking, Handling &
Pre-Installation Checkout . ... ................. 2-1
Installation .. ................... . ..... . .... . . 2-4
External Audio/Remote Control Connect1ons . .... 2-s
Mi cro phone/Line Leve l Input Selection S wit ch .. 2-5
Jumpers & Straps . ............. ... .... .. ...... . 2-12
Controls & Indicators ........... .............. 2-17
Sectio n III Adjustments & Alignment
Introduction .............. . .. ... . . ... . ...... .. 3-1
AdJUstment Tool Checklist .........•........... 3-1
Top Cover Removal ..... .. .... .... .............. 3-2
1 . Motor (Capstan Shaft) Location ....... . ..... 3-6
2. Pressure Roller Pressure ...... .. ............ 3-8
3. Solenoid Air-Damping ....................... 3-10
4. Cartridge Guides .......................... . 3-11
5 . Tape Gui des ................................ 3-13
6 . Reproduce Head Height & Zenith ......... .. .. 3-15
7. "Dummy" Head Height & Zenith . .............. 3-17
8. Reproduce He ad Azimuth ..................... 3- 18
A. MONO Azimuth .... . .... ... .... . ........... 3-18
8. STEREO Azimuth . ... ...................... 3 -1 9
9. Reproduce Amp Output Lev e l ................. 3-23
10 . Reprodu ce Amp Equalization ......... . . ... .. . 3-2 4
11. Miscellaneous AdJustments ...... .... ...... . . 3-2 4
A. Motor C on troller PCB/Motor ........... . .. 3-24
B. Motor Dut y Cycle ... ....... .. ... . ........ 3-24
C. Reproduce Cue Detect Se n si t i vity . ....... 3-24
Recorder Adjustments:
Introduction ...... .. ......... ... . ...... .. • . ... 3-25
1. Record Head Helght & Zenith .............•.. 3-26
2. Record Head Azimuth .......•.......... . ..... 3-28
3. Program Re cord Bias ... . ............. .... ... 3-29
4. Cue Record Bias ......... . . . ................ 3-30
5. Program Record Equal 1 za t1on .............• .. 3· -32
6. Program Meter Calibration . .............. .. . 3-33
7. Miscellaneous Adjustments ................ .. 3-35

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A. Cue Record Level ...... .. . ..... ......... . 3-35
B. Program Level Input Sensitivity ......... 3-35
Head Replacement .............................. 3-35
Section IV Routine Maintenance
l. Mechanical Maintenence Sc hedule .. ...•...... 4 -1
2. Electrica l Maintenance Schedule ..... ....... 4 -2
Section V
Service Ac cess
1 . PCB Swing-up Procedure ... ..... ..... . ....... 5-1
2. Access To Components Under Deck .. • .. •.. .... 5-3
Section VI
Electri ca l Illustrations
l. PLAY/LOGIC PCB ............. . ............... 6-2
A. Parts Lis t. ... .. .... .... ................ 6-2
B. Component Overlay ... . ............... . ... 6-4
C. Schematic .. ....... . ..................... . 6-5
2. RECORD PCB .... . ...... . ..................... 6-8
A. Parts List. ... ... . .. ................ .. .. 6-8
8. Component Overlay ...... ..... ............ 6 -10
C. Schema ti c ............... ..... ........... 6-11
3. MOTOR CONTROL PCB .......................... 6-13
A. Parts List ... . .... .................. . ... 6-13
B. Component overlay ....................... 6-14
C. Schematic ........................... . ... 6-15
4. POWER SUPPLY PCB ................ ........... 6-17
A. Parts List . ..... . . . . . .. ....... . ... . ..... 6-17
8. Componen t Overlay ... .. ...... .... ........ 6-18
c . Sc hem at i c ... . ..........•....... .... ..... 6-19
S . Interconne ction Schematic .................. 6-21
Section VII Me chanical Part s Lists
1. Deck Assembly-Complete ...... . ...... .. .. . .. . 7-2
A. Deck Assembly . ... ..... ..... .... . .. ..... . 7-2
B. Motor Assembly .... . ..................... 7-2
C. So le noid Assembly ........ . ............ . . 7-2
D. Regulator Assembly ...................... 7-2
E. Cart Switch Assembly ........... . ....... . 7-2
F. Cart Guide Assembly ............ . ........ 7-2
G. Head Block A ssembly ........ . .. . .... ... . . 7-2
H. Heads .. ............................. ... . 7-2
I. Head Cabl,e Assemblies . . .... ... .. .. ...... 7-2
2. Front Pane~~Assembly-Complete ..... . . ..... .. 7 -3
3. Rear Panel Assembly-Complete ............... 7-3
4. Chassis/Cover Assembly-Complete ........... . 7-4
A. Chassis ....... . ......................... 7-4
B. Cover ... . ..................... ...... .... 7-4
C . Mis cellaneous ... ........... ............ . 7- 4
Sec tion VIII Change Information •.. ... . .. . .. 8-1

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List Of Illustrations
Title Figure
Microphone Wiring ................. .. ........ 2-1
Sample Remote Control Scnemat1c (Play) ...... 2-2
Sample Remote Control Schematic (Rec) . ...... 2-3
Typical Installation (Grounding) Schemat1c .. 2-4
AC Leakage Te st Dia gram ..... ........••...... 2-5
Correct Grounding Diagram .... . ...... ..... ... 2-6
Star·t Lock Out/1 kHz Flash Jumpers ........ . . 2-7
150 Hz Audio Mute/Flash Jumpers . ............ 2-8
Recorder Input Imped ance Jumpers . ........... 2-9
Motor Control Jumpers .... ... ~ ... ..... ....... 2- 10
Recor de r Equalization Jumpers ..... . .... . .... 2-11
Reproducer Equalization Change Components . . . 2-12
Top Cover Removal .... ............. . ....... .. 3-1
Co ver Off Overview-Fro nt Half ............. . . 3-2
Co ver Off Overview-Rear Half .. . ............. 3-3
Pressure Roller As sembly-Exploded View ....•. 3-4
M otor Mounting Screw Location ...... . .. . ..... 3- 5
Capstan Shaft/Locator Gauge . ..........•..... 3-6
Capstan Shaft to Pressure Roller Contact .... 3-7
C apstan Shaft/Pressure Roller
Sh aft Orientation ... ... ..................... 3-8
Bottoming Solenoi d Plunger . .......•..... . ... 3-9
Pressure Roller Pressure Gauge .... .......... 3-10
Cartridge Sensing Switch/
Clevis Screw Locknut Location ............... 3-11
S olenoid Air -D amp Screw Location ............ 3- 12
Typical NAB AA Cartridge-rndexing Points .... 3-13
Properly Loaded Car t ridge .......... .. ....... 3-14
3-Poi n t Contact Path-Tape Gu ide s ... ...... . . . 3-15
Head Shield Removal . . .. . ... • ...... . ...... • .. 3-16
Tape Height Gauge Placement-
Left/Right Tap e Guide Adjustment ............ 3-17
Ta pe Height Gauge Pl acement-
Center Tape Guide Adjustment .............. .. 3-18
Reproduce Head He1ght/Zen1th Test Hookup .... 3-19
AdJustment Scre w Location-
Reproduce Head Height/ Zen i th ... .. ........... 3-20
Tape Height Gauge Placement-
Reproduce He ad Height/Zeni th . ........• ...... 3-21
AdJUstment Screw Locat1on-
"Dummy" Head H e19 ht/Zen1th ......... ..... ..•. 3-22
Adjustment Scre w Location-
Reproduce Head Azimuth ............ • ...... .... 3- 23
Reproduce (MONO) Head Azimuth Test Hookup ... 3-24
Reproduce (STEREO) Head A zimuth Tesl Hookup.3-25
Oscilloscope Patterns For Phase Shift ....... 3-2 6
Reproduce (S TEREO) Head Azimu th
Test Hookup---Substitute .. ........... ........ 3-27
Reproduce Left Channel Level Control •...•.. . 3-28
Rep rod uce Left/Right Channel Level Control .. 3-29
Reproduce Amp Output Level Test Hookup ..... . 3-50
# Page
#
2-5
2-7
2-8
2-9
2-10
2- 11
2
-12
2-13
2-14
2-14
2-15
2-16
3-3
3- 4
3-5
3-6
3-6
3-6
3-7
3-7
3-8
3-8
3 -9
3-10
3- 1 1
3-12
3 -1 3
3-13
3-1 4
3
-14
3-15
3-15
3-16
3- 17
3-18
3-18
3-20
3- 20
3-21
3-22
3-23
3-23

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..
Reproduce Amp E.Q. Test Hookup ............ . . 3-31
Reproduce Equa11zatton Control ...... ........ 3-3 2
LIN E/ MIC Switch-Recorder .... • . . . ... • ..... ... 3-33
Re co rd Head He19ht/Zen1th Test Hookup .. . ... . 3-34
AdJustment Scr ew Locat1on-
Re cor d Head Height/Zenith .. ...... .. . . ....... 3-35
Tape Height Gauge Placement-
Record Head Height/Zenith ......... . . ........ 3 -3 6
Record Head Azimuth Test Hookup ......... . ... 3-37
AdJu s tment Scr ew Location-
Rec ord Head Azimuth .. . .. .... .. .. ............ 3-38
Program Record Bias T est H oo kup ........... . . 3-39
Program R ec or d Bias Co nt r ol ........... .. . . . . 3-40
Cue Rec ord Bias Te st Hookup .. ... .... . ...... . 3-41
Cue Record Bias Control ...... .• ........... .. 3-42
Pr ogra m Record E.Q. Test Ho okup . ............ 3-43
Pr og ram Rec or d E. Q. Co ntrol ........... . . .... 3-4 4
Program Meter Cal ibration Test Hookup ....... 3-45
Program Mete r Cal1bralion Control ... . ...... . 3-46
Head S hield Removal ............ .. ... .. ...... 3 - 47
Hea d S trap Removal .. . . . ........ . ............ 3-48
Head Cable Color Co de ........ . .............. 3 -49
P CB Sw 1ng-up For Troubleshooting ............ 5-1
5- 2
5 - 3
Access To Com ponents Under Deck . . . ... . ... . .. 5-4
5-5
5-6
5-7
PLAY / LOGIC PCB Componen t Over l ay ...... ..... . 6-1
PLAY /LOGIC PCB Sch ema ti c ...... .. ..... .. . . . . . 6-2
R ECORD PCB Compon ent Overlay .... . ..... ... ... 6-3
RECORD PCB Schematic ...... .... .............. 6-4
MOTOR CONTROL PCB Component Overlay . . .• .. . .. 6-5
MOTOR CONTROL PCB Schematic ....... . ... . ... .. 6-6
POWER SUPPLY PCB Co mp onent Overlay . ......... 6-7
POWER SUPL LY PCB Schematic .... . ..... . .. . . . .. 6-8
Inter c onnect Sc hematic ............. . ...... . . 6-9
List Of Tables
Title Table#
120V /2 40V Component s Ver1f1cation .. . ....... . 2-1
Opti o nal Rack Mo unt Ki t Part Numbers . . ... .. . 2-2
PLA Y/ LOGlC PCB Terminal Block Functions .... . 2-3
RE CO RD PCB Terminal Block Functions ... ...... 2 -4
Start Look Out/1 kHz Flash Jumpers ..... . .... 2-5
150 Hz Audio Mute/Fla s h Jump ers ... .. . ..... .. 2-6
Re co rder Equalization Jumper . ... . . .... . ..... 2-7
Repr o du c er Equalization Change Components ... 2-8
3-2 4
3-2 4
3-26
3- 26
3-26
3-27
3- 28
3-29
3-3 0
3-30
3-31
3-31
3-3 2
3-33
3-34
3-3 4
3-35
3-36
3-36
5-1
5-2
5-3
5-3
5 -4
5-4
5-5
6-4
6-5
6-10
6-11
6- 14
6- 15
6-18
6-19
6-21
Page#
2-2
2-4
2-7
2-8
2-12
2- 13
2 -15
2-16
AdJustment Tool Checklis t ............. . .. . .. 3-1 3-1

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Sec ti on I
I NTROD UCT ION
Int r oduction & Spec ifi cations
This manual provide s instructions for the installa-
tion, opera tion and maintenance of OMEGA series
audio tape c artridge machines from International
Tapetronics Corporation/3 M. OMEGA machines are
available as Stereophonic or Monophonic reproduc-
ers, and as Monophonic recorder/reproduc e rs. All
versions are covered by this manual.
ITC cartridge machines are designed and built for
rugged use, with minimal required effort needed for
normal servicing.
OMEGA series cartridge machines ut1l1ze a crystal-
referenced, DC brushless capstan motor an d bottom-
ing solenoid for stable flutter & speed ac cu racy . A
toroidal po wer transformer significantly reduces
heat and minimizes radiated ele c tromagnetic fields.
Also, a patented head mounting module provides pre-
cise adjustment and alignment for tape co nta ct.
Access for adjustments and rout1ne s ervicing is
made via an easily removable top cover.
Electronics are co ntained on three (3) maJor
printed circ uit boa r ds:
l . The main board, (P LAY/LOGIC), holds the micro-
processor-based playback/record 10910 system, sole-
noid driver circuits, cue/reproduce amplif1ers, and
output transformers. Power supply compone nt s are
located separately on a small PCB assembly whi ch
mount s next to the solenoid.
2. A second board, (MOTOR CONTROL), contains the
motor servo system, including the frequency refer-
ence, motor tachometer, and winding driver ci r-
cuits. This board is mounted ne xt to the motor,
underneath the de ck plate.
3. The thlrd maJor board (RECORD), l.S used in l.he
recorder/reproducer only. Thi s board co ntains the
reco r ding c1rcu1ts, including the input ampl1 f 1er,
meter amplifier, bias generation and amplifier cir-
cui ts , and the record logic (switch & lamp) inter-
face t o the microprocesso r. Also, the record head
drtver~ are located on this bo ard.
The design of the rear housing and PC mo untJ ngs
allow the PLAY/LOGIC and RECORD boards to be tilted
up and over the cha ssis, 1nto an "in-circu1t" tesl
position . This permits servi ci ng the b oa rd s during
uperat 1 on without extender boards or other cu5tom
sp,· v, ce aids.

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1-2
SPECIFICATIONS: OMEGA series cartridge machine s
Power-
A. 105-13 2 VAC or 2 1 0- 26 4 VAC
B. 50/60 Hz
Power consumption-
A. Mono Reproduc e r: 45 VA Typ . ; 65 VA Max.
B. Stereo R eprod u ce r : 45 VA Typ . ; 65 VA Ma x .
C. M ono Recor de r/ Re prod.: 50 VA Ty p.; 70 VA
Max.
T ape Spee d-
A. 7 . 5 IPS (19 cm/s) S ta nd ar d
B. 3 . 75 I PS (9 . 5 c m /s ) St ra ppa ble Opt i on
S peed A ccuracy-
Better t ha n +/ - 0.2%
Capstan Hotor-
A. Di rec t Drive
B. DC Brushl e ss
C. Non-magne t ic , Sta i nl e ss Steel Shaft.
D. Per ma ne ntly Lubrica t ed Ball Bearings
E. Crys t al-ref e re n ce d , Ph ase- l ock e d Con troller
Rec ord/Play Flutte r -(measured on a 3 . 5 mi n. ca r t)
A. Play Max.: 0 . 12% DI N Wtd. @ 7. 5 IPS
B. Rec/Play Max. : 0 . 15% DI N Wtd. @ 7 . 5 !PS
Audio Output Configuration-
Transformer Coup led
Audio Output Impedan c es -
600
Ohm Recommended Load Impedance
(180 Ohm So u rce Impedan c e)
Audio Output Level-
+18 dBm Before Cl 1pp1ng Into 600 Ohm Loa d
Distortion-*
Sys tem: 1.5% or less THD. (Tap e de pe nde nt)
Noise -
A.* Si gna l to Noi s e: Measu r ed with b i as/
no signal.
MONO
56 dB
(or- better)
STEREO
54 dB
(or better)
MIC-MONO R/P
51 dB
(or better)

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B.~ Si gn al to No ise: No ta pe runn1n g;
Souto h Ca rt™ II broa d cas t cartridge 1n place.
MONO
58 dB
(or bet t e r- )
C. Squelc h Noi se-
70 dB o r b etter
Crosstalk (System)-*
STEREO
56 dB
(or better)
-50 dB M1n1mum Se pa r ation Be t ween Any Two
Channe l s.
Frequency
Re sponse-*
A. Pl ayback : +/ - 2.0 dB, 50 Hz to l6k Hz
8 .
R/P-L1ne
Lev el Input:
+/- 2 . 0 dB , 50
C.
R/P-M I C
Lev e l Input: +/ -
3.0
d B,
300
Equalization-
A. 1 975 NAB: Fa c t or y St andard
8. 1 96 4 NAB: Fie ld Convertible
C. C CIR : Field Co nv e rtible
Hz t o 16 kHz
Hz
to 10 kH 2
AdJustments : Hi gh Fr eq ue nc y Via Po te ntiometer
Low Frequenc y V1a Jumper
Head Co nf ig uration-
NAB St an dar d: Mono Pl ay; S tere o P la y; M on o R/P
C ue Signals- (Conforms to NAB Specification)
A. NAB Pr1rnary Cue: l kHz
8 . NA B Secondar y Cu e: 150 Hz
C. Exte r nal Cu e:
1. Cue Record L og ging Input-
Source Imp ed a n ce : l OK O hms or less
Vol t s In: 0 . 5 +/- .2 5 V RM S
2 . Cue Repro d uce Audio Ou t pu t-
Load Impedanc e: 47 K Oh,ns or gr ea tar
Volts Out: 0.5 +/ -. 25V RMS
Audio Input Sensi tivity-
A. Line Input : O dBm nomi nal
8. MIC Input : -70 dBV nominal
(Input Range: +/ - 18 dB From Midpoint Se tting
Of Front P anel Level Control Kno b. )
Audio Input Configuration -
A. Line Input-Transfor mer Coupl ed ~
1. 20 K Ohm Bridging Stan d ard
2. Strap pable f or 150/6 00 Ohms Terminating
Impedanc e

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•
B. Microphone Input:
1. Unbalanced
2. Input Impedance: 50K Ohms
Meter i ng -
A. Monitors Input Level To The Recorder
B. Taut Band Movement with "A'' Scale
Bia s-
111.84 kHz, Crystal-referen c ed
Cartridge Size-
NAB A/AA
Start Ti me-
100 ms typical .
damp ad j ustment.
Stop Tim e-
(D ependent on solenoid air -
less than 100 ms typical.
( Tape travel varie s according to type of c a r-
tridge and length of tape)
Ambient Operating Te mperature Range-
10 to 50 Degrees C. (50 to 122 Degrees F.)
St or age Temper at ure Range-
-4 0 to +85 Degrees C. (- 40 to + 185 Degree s F.)
F ro nt Panel Controls-
A. START Switch: On during RUN; flash e s upon
150 Hz dete c ti on.
8. STOP Switc h: On durtng READY; flashes
slowly upon l kH z Cu e detection ; flashes
fast when stop p ed manually.
C. RECORD SET S witch/150 Hz Record: On dur in g
RECORD/RECORD S
ET; flashes when l kHz ton e
is de f eated. Re cor ds 150 Hz o ue tone when
pressed while machine is 1n RECORD or RUN.
D. CUE S wit c h: Used for high -s peed cue & audio
mute from STOP, START, or REC OR D modes.
(Cancels RECORD SET.) Pressing CUE whi le 1n
high-speed cue causes audio to turn ON for
duration of switch closure .

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Remote Co ntr ols-
A. START Sw1t.ch
8. STOP Switch
C. CUE switch (high-speed & mute)
D. RECORD SET/150 Hz Cue Record/
l KHz Defeat Switc h
E. Cue Bias Enable S witch
F. RUN Lamp: On durin g RUN; fl a s he s upon
150 Hz detection.**
G. READY Lamp ; On during READY: fla~hes slowly
upon 1 kHz Cue detec t ion; flashes fast when
stopped manually . **
H. CUE Lamp: On during high-speed cue _
I. 150 Hz C ue Open Col le ct or Swit c hing to
Ground : ( o perates on 150 Hz Cue dete c tion)
1. Maximum Voltage : 25 VD C
2. Ma ximum Current: 200 ma
J. Record Lamp: On during RE C OR D /REC O RD SET;
flashe s when 1 kHz tone i s defeated . *~
** Rat ings f or lamps**
l. Max im um Voltage: 25 V DC
2. Maximum Current: 150 ma
External Conne cto r s-
Screw Terminal blo cks - A udi e & Rem ote Control
Mo un ting-
A. T able-top Standa rd
B. Rack -moun t Optio n al wi th URM - 0001 Rac k-
mount Kit
(Three units may mount s1de-by-s1de)
Dimensions -
A• W id t h : 14 . 6 cm (5 . 7 5" )
B. Depth: 38 . 1 cm (15.00'')
C. Hei ght: 13.34 cm (5 .25 ")
Add l cm ( . 375") for feet
We igh t - (Typ ical)
A. Mono Reprodu ce r· : 6
.84
8. Stereo Repr o du c e r : 6.84
C. Mono Re corder/
Reproduce r :
6.8 4
D. Total Max.
Shipping We 19tH;
9. 1
kg (15
lbs.)
Kg
(15
lbs .)
k•:1
(ls
lus.)
h:;1 (20
lbs.)
-•---M-- -
Note : Specification s marked with a single asterisk
(*) we re made w ith a ScotchCartT" II broadcast car-
tridge at a referen ce level of 1 kH z@ 250 nWb/m.
I n ternational Tapetr on1cs Reserves
The R ight To Change Products And Specifica tion~
Wi th out Noti ce.
1-5

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CAlJTION
Section II
Installation & Operation
UNPACKING, HANDLING &
PRE -INSTALLATION CHECKOUT
Fully unpa ck the unit, retaining all packing
material. Place the un it in an area suitable
for servicing . Visually inspect the c ha ssis
and cover f or signs of freight damage. Th1s
inspectio n 1s necessary in order to determine
if a damage c laim i s w arra nted.
Occasionally, damage is hid de n and not readily
apparent on external examination . Remove the
top cover by sliding the cover forward approx-
imately 1/4" and lifting the cover off.
Inspect internal components for signs of dam-
age.
If damage is discovered--DO NOT POWER UP THE.
UNIT! Personal injury or further damage to the
machine may occur. When a machine is damaged
in shipment. please follow this pro c edure :
1. Call the ITC Customer Service depa rtmen t to
inform them of the damage .
2. Describe the damage, how
and whether the del1ver1n9
informed . We can assist
forms need to be submitted
1t was discovered
carr1er ha s been
1n determi ning what
fo r a c1a1,n.
3 . Do not repack the machine or di s pose of any
pa c king material until an inspection t)as been
made by the delivering carrier or a represent-
ative .
After i s is d et e rmine d that t he unit has n ot
been damaged 1n shipment, check al 1 inte, · n,H
connectors and other assemblies to make sure
th at nothing has been s haken loo se or come
unplugged. Veri fy th at the 11ne·cord and fuse
are correct for your type o f i n stallation :
(S ee Table 2-1)
2-1

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2-2
"
Un i t
!Yee
120V
240V
120V
240V
12 0V
240V
Q.~...ru:.i r;> ti o n
Pl>i r t umber
- Line Cord-
Nor th Amerioan plug, trrold ed, wi th
gro und lug ....•. . •.••• '. • .• ~ • .•• . . •. • • 433-0001 -000
European type pigtail. provi_ded fo r ·
customer install ed conneotor ••• •.• •••• 433 -:_000 7-00 0
.,
--------- ---- -- ---- --~ ~ ~---~-~--~-.
European Color Co de for b.ead . s:
erown = Liv e Conduotor
Blue : Neut ral C ondu ctor
Gr een w /Yellow St ri~e = Ground
----------------------------------
-Fuse Car rier -
3AG size fuse holder (Grey) . •... .. . .. 418 -00 06 -000
5mm x 20mm Europ 'e an fuse ho lde r.
(BlacK) ... . •.•. ..•.... ••. . . ••. .... " • . 4 18-0007-00 0
-Fuse-
3AG, .75 Amp time-delay ty pe •. .. . . •.. 4 17-0 012-Q0 0
5m m x 20mm , 250V, 400 mA
slo-blo type .. . ..•.•.• •. • •••.•.• . . ..• 417-0018-0 00
-----~--------------------- ------------------------ -~----- -- -
Operational
Checkout
P1·1or to actu al inst allation, it is a d visab l e
to perform a short, op er ationa l c he ck on t he
unit :
l. With the top c over removed, p l ug the unit
in and check to make su r e that the motor i s
running . No fr on t panel l a mps w il l be illumi-
nated.
2 . In se r t a blank ta p e c art r i dge into t he
mac hine. The yell ow (READY/STOP) lamp will
i llumi na te, indi ca t i ng the m oto r and mi cro p ro-
cessor are functional.
3. P ress the green (RUN/ START) butt o n. The
green lamp will com e on , t he yellow l amp will
go out, th e solen o id p lung e r will pul l 1n and
t ape will be pulled.

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Factory Setup
4. Press the yellow butt o n. The g ree n lamp
W ill go out, the solenoi d plunge r will r ele ase
and th e tape wi ll stop . T he yellow lamp w il l
be flashing .
5. Pres s t he blue bu t ton . The blue lam p wi l l
illumin a t e , the s olenoid pull 1n again, and
and the m ot or increase to approximately 3X
n ormal sp e ed for "hig h-speed " cueing . Simulta-
neous ly, the yello w lam p will e xtinguis h.
6 . P re ss
function
lamp w il l
flash.
the yello w b utt o n . As before, t he
in progr e ss wil l be halted. The blue
exting u i s h, and t he yel l ow l a mp
7. Rem ove the c a r t ridge f rom the mac h i n e. The
yel l ow lamp will go o ut . Unp l ug t he unit.
I f t he m otor fails to run or 1 f any o f t he
l am p s fail to illuminate, check connec ti ons to
make sure that not h ing has c ome loo s e . The
lamps may be c hecked by re m oving the switch
lens ( pull str aight f o rward ) a nd reseating th e
bul b .
Factory setup procedures c all for adjusting
and testing this unit to prevailing industry
s tandards. The unit's final s etup s tandards
may be different than those already in us e at
your facility. Therefore, a c areful check of
th i s unit' s operating parameter s i s in order
t o in s ur e that the unit c onf or ms t o yo ur
need s . We make every pos s ible effort t o in s ure
the ac c ura c y of our fa c tor y adju stme nt s a nd
pre s ume that c ertain setup condition s ex i s t a t
y
our fa ci lity . These c ondition s in c lud e, b ut
ar e not limited t o input level, output level ,
r
eco rd flu xiv ity, e qualization, ta pe t y pe ,
c
artridge type, etc . Please c h ec k the un i t 's
fi nal in s pe c tion tag and the S pe c i f i c ati ons
s e c
ti o n o f thi s manual for s etup in fo rmat io n .
To complete the pre - 1 nsta l la tio n process T 1 na~ e
not e 1n your company's permanent r ecor ds of
tl1e Cl,~te you received the e q u.1pment, and t11e
model/seria l numb ers . You may ne e d thi s 1nfo r -
mat1on for futu r e reference.

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2-4
Machine
Installation
CAUTION
Ventilation
CAUl10N
INSTALLATION
TABLE TOP: Your OMEGA cartr i dge machine was
s h ip pe d f rom th e factory as a t a ble-top u nit.
Up t o three (3) units may be mo unt ed on to p of
each other. Uni t s shoul d no t be fully enclosed
un less additional ve ntilation is provi ded by
external sources. (See VENTILATION) I n addi-
tion, units shoul d not be placed on top of
equipment producing larg e amou nts of heat.
RACK MOUNTING: OM EGA car t ridge machine s may be
rac k mounted. Three (3) units will fit s1 d e-
by-side in a standard 19" rack op enin9. ITC
makes available a universal r a ok mounting kit
and filler panel as options. Pleas e r e fer to
Table 2-2 for ordering informatio n .
Desoript i on
URM-0001 Univ e rs al Rae k Mou nt.
1 /3 R ack Widt h Fi ller P an e i .
Part Number
878-00 8 9- 01 0
87 8 -0 0 91 - 0 00 '
----~ - ~---------~---- ~---~-- --- -- -- ~- ---------
To pr ep are t he unit fo r rack mo u nting, remove
al l four ( 4 ) feet and the top cover. Place
these parts in a storage area for use if
needed a g ai n .
,Rack mounted units may be installed without
lids. and must have power disoonnected during
removal from or installation into the rack
frame.
The unit's top co ver, and the URM-0001 ( r ac k
mount) . are slotted to allow normally gener-
~ted heat to diss i pate without a llow i ng debris
to fall 1nto the chassis. No for c ed a1r cool-
ing is needed unless the unit is to be
installed in fully closed, un vent i late d hou-
sing. If a fully c lose d ho using i s used, a
ventilating fan should be in s talled to d ra w
heat away from the unit. Als o , c heck air - flow
f r om the fan and instal l a filter 1f needed to
pre v ent ex c ess dust from being drawn 1nto the
cart ma c hine.
Do not block the top cover slots, or those of
the URM-0001 by placing material on top the
unit ~ Abnormal heat buildup will cause compo-
nent life to be considerably shortened .

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External
~/Output
Recorder
lrl)Ut Switch
Miaophone
Wring
Cabling
EXTERN AL A UDIO/ REMOTE CO NTROL CO NNE CTI ON S
Connec t1on s for external audio inputs/ o utput $
and remote controls are made at rear panel
t e rminal bloc , ks.
Audi o outpu t for playback un its i s baldnced,
trans f ormer c ouple d . Au d io 1nput f or
record/playba c k units 1s transfo r m er co~pled
ba l anced or un balanced . (See Jumpers & Strap~
li3. )
MI CR OPHONE /LI NE LEVE L INPUT SELECTION SWITCH
Slid e swi t c h S301, l oc ated on the Recoro
Amplifier PC B, lS used to sel e ct E[THER the
M icro ph on e level inp u t, ( TB 301-Pins 1 & 2 ), or
the Line audio input, (TB301-Pins 3 & 4). ON LY
one in p ut m ay be s el ect ed at a lime. The sl1de
s witch kn ob 1s moved t ow ard the back o f Lhe
ma c hine for Line position and t owa r d the front
of the machine for Microphone position.
M ic r ophone input JS un balan c ed . Please reter
t o Figure 2-1 . f or a s amp le microp ho ne w1r 1n~
diagram.
TB-301
2
TB-301
2
----------------- -- -----~
SAMPLE WIRING DIAGRAM
-UNBALANCE~ HGH IMPEDANCE
MICROPHONES
SAMPLE WIRING DIAGRAM
-BALANCED,1. LOW
IMP EDA NCE
MICROPHONt.S
Fig. 2-1
IT C r e commends that only s h iel ded , twi s ted
pair cabl e be used for in put/outp ut connec-
tions . In some remote audio output applica -
tions) uns h ielded ca ble may be tolerated 1f
necessary, but thi s is not recommended .
2-5