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