Sykes 3000 Series User manual

SERIES 3000 SERVICE MANUAL
• EIA Cassette Tape System
• Cas$ette Tape· Controller

WARRANTY
SYKES DATATRONICS, INC. warrants each product of its manufac-
ture to be free from defects in material and workmanship. This warranty is
limited to service and adjustments of the product and to repair or replace-
ment of parts thereof (except fuses and lamps) for a period of 90 days from
date of shipment from Sykes Datatronics, Inc. ;provided that defective parts
are returned to us with transportation charges prepaid and that our exami-
nation discloses the defect to our satisfaction.
Products or components will not be accepted at the Sykes Datatronics,
Inc. plant without prior authorization by a company representative or au-
thorized service agency representative.
This warranty does not apply to products which have been altered or
repaired by other than factory authorized representatives nor does it cover
damage caused by misuse or negligence of persons other than factory au-
thorized representatives.
Sykes Datatronics, Inc. w~rrants title to the goods to be transferred
hereunder and further warrants that the goods shall be delivered free of the
rightful claim of any third person by way of infringement unless the buyer
furnishes to the seller specifications relating thereto in which case the buyer
shall hold Sykes Datatronics, Inc. harmless against any such claim which
arises out of compliance with the specifications.
EXCLUSION OF OTHER WARRANTIES
THERE ARE NO WARRANTIES, EXPRESS OR IMPLIED,
OF MERCHANTABILITY, FITNESS, AFFIRMATION OF FACT,
OR OTHERWISE, WHICH EXTEND BEYOND THE
DESCRIPTION HEREIN.
-'

SERVICE MANUAL
for
Series 3000
EIA Cassette Tape System
and
Cassette Tape Controller
Prepared by
SYKES DATATRONICS, INC.
CUSTOMER SERVICE DEPARTMENT
SYKES DATATRONICS, INC. ROCHESTER, NEW YORK 14606
Sykes Publication No. 9991C3000A Printed in lJ .S. A.
Price of additional copies - $45. 00

SCOPE OF MANUAL
This document provides service information for two Series 3000
devices and their options: the Series 3000 Cassette Tape Controller
Unit and the Series 3000 EIA System. Descriptions of these devices,
their specifications and functions are contained in Section 1 of this
manual.
Sections 2 through 10 describe the various major components of
the Series 3000 Units as indicated on the index tabs. These Sec-
tions include instructions for dismantling and assembling of the
indexed component(s) and any subassemblies; also parts illustra-
tions and replacement parts lists for equipment included in the
Section.
Adjustment and periodic maintenance information are contained
in Section 11, followed by a trciubleshooting guide in Section 12,
and a complete set of logic schema tic and other diagrams filed
in Section 13.

CONTENTS
SECTION 1.
GENERAL DESCRIPTION OF EQUIPMENT ••••••• o •••••••
1.1
1.lol
1.1.2
1.2
1.3
1.4
1.4.1
1.4.2
1.5
1.5.1
1. 5.2
1.6
1.6.1
1.6.2
1. 6.3
1.7
1.8
Series 3000 Equipment
•• 0 •••••••••••••••••••••••••••••••• 0
Series 3000 Cassette Tape Controller Unit ••• o ••• o •••••••
Series 3000 EIA. System •• o •••••••••••••••••••••••••••••
E~lanation of Terms •.••.•••••••••••••••••••••••••••••••••
Tape Cassette Requirements o ••••••••••••••••• o •••••••••••••
Series 3000 In.terfaces •••••••••••••••••••••••••••••••••••••
Series 3000 EIA. Cassette Tape System Interface ••••••••••
Series 3000 CTC Breadboard Interface Kit •••••••••••••••
Specifications .............. - •••• A .... "' • 0 ••• 0 •••• e e ••••• " ••••
General ...........................................•..
Tape Transport Perforlll.ance ••••.••.••••.••••••••••••••
Tape Format Information •••••••••••••••••••••.••.•••••••••
General ......••..•...•...•......•..•.•.•...•..•......
Character Format •••••••••••••••••••.•••••••.•••••••••
Tape Format .......•..................................
Synchronization and Character Error Detection •••••••••••••••
Overall Functional Description •••••••••••••••••••••••••.••••
SECTION 2. ENCLOSURE COMPONENTS •••••••••••••••••••••••••••••
2.1
2.1.1
2.1.2
2.2
2.2.1
2.2.2
2.3
2.3.1
2.3.2
2.3.3
Desk Top Unit Enclosure •••••••••••••••••••••••••••••••••••
Top Cover ••••••••••••••••••••••••••••••••••••••••••••
Front Panel Assembly •••••••••••••••••••••••••••••••••
Rack Mountable Unit Enclosure ••••••••••••••••••••••••••• ~.
Top Cover ••••••••••••••••••••••••••••••••••••••••••••
Front Panel Assembly •••••••••••••••••••••••••••••••••
Components Common to Both Enclosure Types •••••••••••••••
Pivoting Support Bar for Logic Assembly ••••••••••••••••
Power Switch/Indicator Assembly •••••••••••••••••••••••
Cooling Fan Assembly ................................. .
1-1
1-1
1-2
1-3
1-6
1-7
1-8
1-8
1-8
1-8
1-8
1-9
1-10
1-10
1-11
1-11
1-13
1-14
2-1
2-1
2-1
2-1
2-3
2-3
2-3
2-4
2-4
2-5
2-5
i

2.3.4
2.3.5
2.3.6
2.3.7
2.4
Fan Filter ••••••••••••••••••••••••••••••••••••••••••••
....................................
Transport Tie Bar
Fuseholder and Fuse
..................................
Power Line Filter •••••••••••••••••••••••••••••••••••••
Parts List - Enclosure Components, Desk Top and
Rack Mollllt •••••••••••••••••••••••••••••••••••••••••••••
SECTION 3.
TAPE TRANSPORT ASSEMBLY •••••••••••••••••••••••••
3.1
3.1.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
:-' .15
3.16
3.17
3.18
3.18.1
3.18.2
3.19
ii
Description of Tape Transport ••••••••••••••••••••••••••••••
Removal/Replacement of Transport •••••••••••••••••••••
Cassette Holder Assembly •••••••••••••••••••••••••.•••••••
Tape Head Slide Plate Assembly •••••••.•••••••••••••••.••.•
Tape Head Slide Plate Solenoid •••••••••••••••••••••••••••••
Pinch Roller Solenoid
.....................................
Pinch Roller Assembly •••••••.••••••••••••••••••••••••••••
Tape Guide Assembly ••••••••••••.•.••••.••••••••••••••••••
Magn.etic Tape Head •••••••••••••••••••••••••••••••••••••••
Capstan Drive System (60 Hz and 50 Hz) •••••••••••••.•.•••••
Capstan Motor •••.••••••••••••••••••••••.•••••••••••••••••
Reel Drive System ••.•.••••••••••••••••••.•••.•••.••••••••
BOT /EOT Sensor and Lamp ••••••••••••••••••••••••••••••••
Change TA (Tape Address) Sensor and Lamp ••••••••••.••••••
Cassette-In-Place Switch
...................................
Track Protect Switches ••.•..••.•.••.••••.•••••.••••••.••••
l\1otor Control ... .:\ssembly ••••.••.•.••...•..••..••....•..••.•
Read/Write Assembly .•.•.•.•••...••.•••••••••.•.....•••.•
Timing Requirements ..•..•.••.•.•..•....••.•.••....••.•...
Forward-Reverse Sequence Timing ••••.••••.••.•••.•••.•
Read/Write Sequence Timing ..•....•••..••••.••.••.•.••
Optional Vacuum Tape Cleaning System .•.•..••••.•....•...•..
2-6
2-7
2-7
2-8
2-13
3-1
3-1
3-2
3-4
3-6
3-7
3-7
3-8
3-9
3-9
3-10
3-11
3-12
3-13
3-14
:3-15
3-16
3-20
3-20
3-20
3-21

3.19.1
3.19.2
3.19.3
3.19.4
3.20
3.21
3.22
3.23
Vacuuin Pu.Illp Assembly ••••••••••••••••••••••••••••••• 3-22
Vacuum Line Filter Assembly
Tape Guide/Cleaner Assembly
..........................
3-23
3-23
Vacuum Tubing • • • •• • • • •••• • • ••• •• • •• • •• •• • • • ••• • •• • • • 3 -2 3
Parts List -TT120 Transport (Front & Rear Views) •• • •• • • ••• 3-27
Parts List - Motor Control Assembly........................ 3-29
Parts List -5 IPS Read/Write Assembly • • ••• • •• • •••• •• ••• ••• 3-33
Parts List -12 IPS Read/Write Assembly • • • •• • • •• • •• • • •• •• • • 3-37
SECTION 4. MULTIPLE VOLTAGE POWER SUPPLY
ASSEMBLY (MVPS) • • • • •• • •• • • ••• • •••• • •• • •• • • • •• • ••• 4-1
4.1 General • • • ••• •• • •• • •• • • • • •• ••• • • •• • •• • •• • • • •• • ••• • • •• •• • • 4-1
4.2 Electrical In.puts • • • ••• •• • •• • •• • • •• •• •• • •• • •• •• • • • •• •• • •• • • 4-1
4. 3 Electrical Outputs • • • •• •• • •• ••• • • •• • •• • •• • • • •• • •• • • • ••• ••• • 4-2
4. 4 Removal/Replacement • . • • . • • •• • •. • • • •• •• • • • • •• • • • • •• •• •• • . 4-3
4. 5 MVPS Power In.put Connections -120 VAC or
230 VAC I:h.put • •• • •• • • • •• • • • •• • •• • • • •• • •• • •• •• • • •• •• • • • . • 4-5
SECTION 5. CONTROLLER BOARD ASSEMBLY •• • • •• • •• •• •• • • ••• • •• • 5-1
5.1
5.1.1
5.1.2
5.2
5.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
Description of Controller Board Assembly •• • • • •• • • •• • • • •• • •• 5-1
Access to Controller Board • • • • • •• • • • •••• • •• • • • • ••• • .. • •• 5-3
Removal/Replacement • • • • • •• •• • • •• • • •• • • •• • • • • ••• • •• .. • 5-3
Controller Operations • • • • • ••• • • ••• •• • • •• • •• ••• • • • •• • •• •• • • 5-3
Controller Interface Signal Descriptions . • •. • •• . . •. •• •. •. •. . . S-10
Interface Signal Timing •• • • • . •• . . •. • • •. • •• . •• •. . • . • • . . . . . . . 5-21
Command Execution Timing •• • •• •• • • ••• • •. • . •• . ••. • . . . • 5-21
Rewind Tim..in.g ••• •• •• • •• • •• . • . • •. •• •••• • . . • • . . . • •• . . . . 5-22
Write Data Timing . • . • • . • . . . •• • . •. . ••. • . • •. • . . • . •. . . . . 5-22
Read .Data. Timing • . • • . • . ••. . . •• . • • . • . •• • • • •. ••• • • • ••• • 5-23
Write File Mark Timing •.••••.•.••.••••••••••••.. ~ . . • . 5-23
File Mark Data Transfer Timing . . • •• . . . . • •. . . • •. . . . •. . 5-24
iii

5.5
5.5.1
5.5.2
5.5.3
5.6
Miscellaneous Controller Notes •••••••••••••••••••••••••••••
Simultaneous Operations •••••••••••••••••••••••••••••••
Far End of Tape Detection •••••••••••••••••••••••••••••
Data Packing Density ••••••••••••••••••••••••••••••••••
Electrical Parts List - Controller Board Assembly
...........
SECTION 6. HIGH SPEED SEARCH OPTION BOARD (HSSO)
...........
6.1
6.1.1
6.1.2
6.2
6.3
6.4
6.5
6.5.1
6.5.2
6.5.3
6.5.4
6.6
6.7
6.8
6.9
Description of High Speed Search Option •••••••••••••••••••••
Access to HSSO Board
.................................
Removal/Replacement
.................................
Theory of Operation •••••••••••••••••••••••••••••••••••••••
HSSO Ope rations .•.•••••••.•••.•••.•••••.••••.••.••••••.••
HSSO Interface Signal Descriptions
In.terface Sign.al Timing ••••••••••••••••••••••••••••••••••••
Search and Read File Signal Timing •••••••••••••••••••••
Address Enquiry Signal Timing •••••••••••••••••••••••••
Writing File and Load Marks Signal Timing ••••••••••••••
End of File Character (EOFC) Update Timing ••••••••••••
HSSO Settings • • •• • • • • •• •• •• • •• •• • • • • • ••• • • • •• • • •• • • •• • ••••
Dual Tape Operation Notes ••••••••••••••••••••••••••••.••••
Pin Number List - Signals Between HSSO Board and
EIA or Wire Wrap Interface Board •••••••••••••••••••
Electrical Parts List - HSSO Board •••••••••••••••••••••••••
SECTION 7.
EIA INTERFACE BOARD AND I/O PANELS ••••.•••••••••
7.1
7.2
7.2.l
7.2.2
7.2.3
7.2.4
iv
Description of EIA Interface ••••••••••••••••••••••••••
EIA Interface Board •••••••••••••••••••••••••••••••••
General ......•..........•. o • • • • • • • • • • •••••••••••••••
Functional Description of Block Diagram •••.•••••.•...•.
Access to EIA Interface Board ••••••••.••.•....••.•.••.
Removal/Replacement ••••••••••••••••.•..•.•.••.•...•
5-25
5-25
5-25
5-25
5-28
6-1
6-1
6-3
6-3
6-3
6-4
6-11
6-16
6-16
6-17
6-18
6-18
6-19
6-21
6-22
6-24
7-1
7-1
7-1
7-1
7-2
7-7
7-7

7.3
7.4
7.5
7.5.1
7.5.2
7.5.3
7.6
7.7
7.8
EIA I/O Panel Assembly • • • • • • • • • • • • • •• • • • • • • • • • • • • • • •• • • • • 7 -7
Terminal and Modem I/ O Connector Pin Assignments • • • •• •• • • 7 -8
RS-232-C Interface Specifications • • • • •• • •• •• • ••• • • • •• • •• ••• • 7 -10
Modem Port Signals (On-Line to Tape Mode) • • • • • • • • • • • • • 7-10
Terminal Port Signals (Off-Line Mode) • • • • • •• • • • • • • • • • • • 7-12
Optional Current Loop Interface • • • • • • • • • • • • • • • • • • • • •• • • 7-14
In.sta.llation • •• • • •• • •• • • • •• • • •• • • • •• • ••• • ••• • •• • • • • • •• • •• •• 7 -14
Electrical Parts List -EIA Interface Board • • • • •• • • • • • • • • • • • • 7-16
Parts List -EIA Interface I/O Panel Assemblies
.•...........
7-19
SECTION 8. EIA OPTION BOARD ASSEMBLY • • • • • • • • • • • • • • • • • • • • • • •• 8-1
8.1
8.1.1
8.1.2
8•2
8.3
8.4
8.5
8.6
8.7
8.8
Description ••••••••••••••••••••• ., ••••• ., • •• • • ••• ••• ••• .. • • • • 8-1
Access to Option Board • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 8-1
Removal/Replacement ••••••••••••••••••••••••••••••••• 8-1
Transparent Receive Mode Option • • • • •• • • • • • • • • • • • • • • • • • • • • • 8-3
Current Loop to RS-232 Converter Option ••••••••••••••••• :• • 8-4
Copy/Dual Option (Dual Transport Systems Only) • • • • • • • • • • • • • 8-5
Output Delay Option • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 8-5
Custom Baud Rate Option • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 8 -6
Auto Disconnect/Remote In.terrupt Option
Electrical Parts List -EIA Option Board
8-8
8-10
SECTION 9. BREADBOARD INTERFACE, SERIES 3000 CTC UNITS • • • • 9-1
9.1
9.1.1
9.1.2
9.1.3
9.2
Breadboard Interface Kit • • • • • •• • • • • • • • • • • • • • • •• • • • • • • • • •• • • 9-1
General . . . . . ••. • . •• . . •. •. . . . . . . . . . •. . . . . . . •• . •. . . . . • . 9-1
Access to Interface Board in Unit • • • •• •• • • •• • • •• • • •• • •• • 9-2
Removal/Replacement • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • 9 -2
Pin Number List - Signals Between Controller Board
and Wire Wrap Breadboard Interface Board • • • • • • • • • • • • • • • •• 9 -3
9. 3 Wire List - Cable from Wire Wrap Breadboard to
Rear I/ 0 Pan.el o • • • • • • • • • • • • • • • • • • .• • • • • • • • • • • • • • • • • • • • • • • 9 -4
v

9.4
9.5
Pin Number List - Signals Between High Speed Search
Option Board and Wire Wrap Interface Board ••••••••.•..•..•
Parts List - Wire Wrap Breadboard Interface Components •.••
9-5
9-8
SECTION 10. CONTROL SWITCH AND PC BOARD ASSEMBLIES FOR
FRONT PANEL AND FOR PERIPHERAL KEYBOARD • • . 10-1
10 .1 General •••••••••••••••••• ~... • • •• • • •• •• • • • • ••• •• . • • . • . . • 10-1
10.2 Left and Right Hand Control Switch Modules • • • • •• • • •• • • • . • •• 10-2
10. 3 Integral Control Keyboard - Series 3000 EIA Systems • • • •• • • • • 10-3
10.4 Peripheral Control Keyboard Option - Series 3000 EIA
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
10. 5 Mechanical Parts List - Control Switch and Keyboard
Assemblies • • •• . •. • •. • • ••. • • •• • . •• • • • •• . • ••• • •• • •• •• • •• • 10-9
10. 6 Electrical Parts List - PC Boards for Control Switch
and Integral Keyboard Assemblies • • • • •• • • •• • •• • •• •• • • • ••• • 10-11
10. 7 Electrical Parts List - PC Board for EIA Peripheral
Keyboard Assembly •• • • • • •• •• • •• • • • •• • • •• • •• • • •• • • •• • • •• • 10-13
10. 8 Parts List - Optional I/O Cable Assemblies for 3000
EIA System • • •• •• • •• • •• • • •• • •• • • • •• • • •• • • • •• • •• • • • • •••• • 10-14
SECTION 11. ALIGNMENT AND MAINTENANCE PROCEDURES • • • •• • • 11-1
11.1
11.1.1
11.1.2
11.1.3
11.2
11.2.1
11.2.2
11.2.3
11.2.4
11.2. 5
11.3
11.3.1
vi
Routine Checks and Adjustm.ents • • • • • •• • • •• • • •• • •• • • ••• • • •• • 11-1
Capstan Drive Belt • • •• • • •• •• • • • • •• • •• • •• • • •• •• • •• • ••• 11-1
Pinch Roller and Pinch Roller Solenoid • • • • • • •• • • • • • • ••• • 11-1
TA Sensitivity •• • •• •• • ••• • •• • • • •• • • •• ••• • • • •• • •• • • •• • • 11-3
Corrective Adjustments • • •• • • • • •• • •• • •• •• • ••• • • •• • •• • •• •• • 11-4
BOT/EQT Sensitivity.................................. 11-4
Slide Plate Solenoid • • • • •• • •• • • •• •• • •• • • • • •• •• • • •• ••• • • 11-4
Tape Head and Read/Write Assembly • •• • • • • •• • • • • • •••• • 11-6
Power Supply •••••••••••••• ~ ...... ,. • • • • •• • • •• .. •• • •• ••• • 11-6
Fast and Slow-Speed Servo Adjustments ••••• ,. •• •• • • • • •• • 11-6
Preventive Maintenance Procedures • • •• •• • • •• ••• •• • •• • •••• • 11-7
Cleaning Control Keys • • • • • •• • • • •• •• • •• • • •• • • •• • • • •••• • 11-7

11.3.2
11.3.3
1L3A
Cleaning Tape Head, Tape Guide, and Pinch Roller •• • ••• • 11-7
Cleaning the Cooling Fan Filter • • • • •• • •• • •• • • ••• • • ••• •• 11-8
Cleaning Vacuum Filter (Units with Tape Cleaner
Option) • • •• •• • •• • •• • •• •• • • • •• •• •• •• • •• • •••• • • • • •• •• • 11-9
11. 3. 5 Handling and Storing Tape Cassettes • • • • ••• • •• • • • • • ••• • • 11-1 O
SECTION 12. TROUBLESHOOTING GUIDE • • •• •• •• •••• ••• • •• • • •• • •• • 12-1
12 . 1 General . . . . . . . • . . . . . • . •. . • . . . . •. . . . . . . . . . . . . . . . . . . . . . . . . . 12 -1
12. 2 Troubleshooting Chart and Check List Index •• •• • ••• • • • •• • •• • 12 -2
12•3 Troubleshooting Outline •. • • •• •• •. •• •• • ••• • •• • •• • • • •• • • ••• • 12 -3
SECTION 13. SCHEMATIC AND INTERCONNECTING DIAGRAMS ••• •• • 13-1
13 .1 Designation Codes for Equipment Areas, Components
and Connectors -Main Unit • • • ••. • • • • •• •• • •• • • •• • • • • •• • . • • 13-1
13. 2 Designation Codes for Components and Connectors -
Peripheral Keyboard Assembly •• •• ••••• •• •• ••• ••• • •• •• • •. • 13-4
vii

ILLUSTRATIONS
Figure
Page
1-1 3220 CTC Unit, Desk Top Version • • • • •• • • ••• •• •• • •• •• • •• •••• 1-2
1-2 3220 EIA System, Desk Top Version with Integral Keyboard 1-3
1-3 3220 EIA System, Rack Mountable Version with Integral
Key ooard • • • • • •• • • ••• • •• •• • • •• •• • • •• • • •• •• •• • • ••• • •• •• •• • 1-4
1-4 Peripheral Keyboard Assembly • • • • • • • •• • • •• • • • •• • ••• •• • • • •• • 1-5
1-5 Tape Leader, Trailer and Tracks • • • • • •• • • •• • • • •• • •• • • •• • • •• • 1-10
1-6 Cl1aracter Format • •• • •• ••• • • •• • • •• • • • •• • •• • • •• •• • •• •• • • •• • • 1-11
1-7 Tape Format • • • • • •• • •• ••• • •• • • ••• • • • •• • ••• •• • •• • •• • • • ••• •• 1-12
1-8 Block Diagram, Series 3000 CTC or EIA Unit • • • • •• •• • • • •• • •• • 1-15
2-1 Dimensions - Desk Top Units • • • •• •• • •• • • •• •• • •• •• • •• • • • •• •• • 2-9
2-2 Dimensions - Rack Mountable Units • • •• • • • ••• • •• • •• • •• •• • ••• • 2-10
2-3 Desk Top Enclosure Components • •• • •• • •• • • • ••• • • ••• • • •• •• •• • 2-11
2-4
3-1
Rack Mountable Enclosure Components
Tape Transport Assembly, Front View
.......................
.......................
2-12
3-4
3-2 Tape Transport Assembly, Rear View, Showing Connector
Codes ••••••••••••• , • •• • • .. • • •• • • ••• • •• •• •• •• • •• • • •• • •••• • 3-5
3 -3 Basic Drive Layout • • • •• • •• •• •• • • •• • • • • •• •. • • • • • •• ••• • •• • • •• • 3-8 ·
3-4 Block Diagram, Read/Write Assembly • • •• •• • • •• • • • •• • •• • ••• • 3-18
3-5 Timing Requirements for Typical Forward-Reverse
3-6
3-7
3-8
3-9
3-10
3-11
4-1
4-2
5-1
viii
Sequence • • . • • • •• • • •• • •• • • • ••• • •• • • •• • •• • • • ••• . • • •• • • •. • • • 3-20
Timing Requirements for Typical Read/Write Sequence • • •• • •• • 3-21
Exploded Front View of TT120 Transport • • •• • • • •• • •• • • • • •• •• • 3-25
Exploded Rear View of TT120 Transport • • • • • •• • ••• • • •• • • •• •• • 3-26
Motor Control Assembly • • • • • •• • • •• • • • • • ••• • • •• •• • •• • • • •• •• • 3-31
5 IPS Read/Write Assembly • • • •• • • • ••• • • • ••• • • • •• • • • • • • •• •• • 3-32
12 IPS Read/Write Assembly •• • • • • • •• • •• • •• • • • •• • • •• • • • • •• • • 3-36
Wiring Side of Connector Pl (PSlJl Mate) •• • • • • • •• ••• • • • • • ••• • 4-2
Multiple Voltage Power Supply • • • • •• •• • • • • •• • •• •• • ••• • • • • •• •• 4-6
Block Diagram, Controller Board Assembly • • •• •. • • • . . • • . •. • •. 5-2

Figure
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
6-1
6-2
6-3
6-4
6;_5
6-6
6-7
6-8
6-9
7-l
- '"' 1-0
7-4
8-1
8-2
Flow Chart, General Operations Sequence •••••••••••••••••••••
Flow Chart, Read and Skip Sequence ••••••••••••••••••••••••••
Flow Chart, Backspace Record or File Sequence •••••••••••••••
Flow Chart, Write File or End Mark Sequence •••••••••••••••••
Command Execution Signal Timing •••••••••••••••••••••••••••
Re'Wind Tim.in.g •••••••••••••••••••••••••••••••••••••••••••••
Write Data Timing ••••••••••••••••••••••••••••••••••••••••••
Read Da.ta Timing ••••••••••••••••••••••••••••••••••••••••••
Write File Mark Timmg •••••••••••••••••••••••••••••••••••••
File Mark Da.ta Transfer Timing •••••••••••••••••••••••••••••
Contl"oller Board ••.•.••••.••.••••••••••••••••••••••••••••••
Block Diagram, High Speed Search Option •••••••••••••••••••••
Flow Chart, HSSO General Search Sequence •••••••••••••••••••
Flow Chart, Search for Desired Tape Address •• ~ ••••••••••••••
Flow Cr.a.art, Enquire Sequence •••••••••••••••••••••••••••••••
Flow Chart, Mark Write Sequence .•••••••••••••••••••••••••••
Flow Chart, File Mark Tape Address Update Sequence •••• _ •••••
Search and Read File Signal Sequence Timing ••••••••••••••••••
Address Enquiry Signal Timing ••••••••••••••••.•••••••••••••
Writing File and Load Marks Signal Timing ••..••.•.•••......•
End of Fil~ Character (EOFC) "Cpdate Signal Timing •.••.•.....•
Hi.~h Spet"'d. Search Option (HSSO) Board ...••.•.•..•.........•.
Bh_)ck Diagram - Series 3000 EIA Interface .••••...••••...•••..
RS-232-C Electrical Specifications and Voltage Levels •...•..•.
EL.\ In.ter:face Board ••.•..•.••.••••.••.•.•.••.•.••.••.....•.
EIA Interface I/O Panel Assembly ••.•..•....••••.••.•• · • · • · • •
Flow Chart of Keyboard Controlled Transparent Ikcei ve Mode ••.
Flow Chart of Copy File Sequence ..••.•••••••••..•••. • · • · • • • •
Page
5-4
5-8
5-9
5-11
5-21
5-22
5-22
5-23
5-24
5-24
5-27
6-2
6-6
6-7
6-8
6-9
6-10
6-17
6-17
6-1~
c-1rs
7_.,
•J
7-J"
7-l;,
7-18
8-2
8-7
ix

Figure
Page
8-3 EIA. Option Board . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . • . . . . . . . • . 8-9
9-1 Wire Wrap Breadboard Kit • •• •• • •• • • • •• •• • • • •• • •• • •• • • • ••• • • 9-7
10-1 Control Switch and Integral Keyboard Assemblies • • • • • •• • •• ••• • 10-7
10-2 Peripheral Keyboard Assembly • • • • • • •• • • • •• • •• • •• •• • • • •• • •• • 10-8
10-3 PC Boards for Control Switch and Integral Keyboard
Assemblies • • • • • . • •• • •• • •• • •• •• • • • • •.• • •• • • •• •• • • •• •• • •• • • 10-10
10-4 PC Board for EIA Peripheral Keyboard • • • •• • •• • • • • •• • • •• •• •• • 10-12
11-1 Pinch Roller Adjustments •••••••••••••••••••• • •• • •• • • • • •••• • 11-2
11-2 Tape Head Slide Plate Solenoid Adjustment •• • • • •• • • • • •• • • • •• • • 11-5
11-3 Cleaning Tape Head, Guide, Pinch Roller • • •• •• •• • • •• •• • • • • •• • 11-8
13-1 Harness Layout - Desk Top Series 3000 Unit • • • •• • • •• • • •• • ••• • 13-6
13 -2 Harness Layout - Rack M01.mtable Series 3000 Unit •• • • •• • •• • • • 13-7
Schematic Diagrams
x

1.0
1.1
SERIES 3000 Service Manual
General Description
SECTION 1 - GENERAL DESCRIPTION OF EQUIPMENT
SERIES 3000 EQl.JIPMENT
Sykes Datatronics, Inc. Series 3000 equipmen~ employs Sykes
high performance cassette-loaded tape transports in combina-
tion with a functionally oriented cassette type controller which
can be interfaced to a variety of systems.
This manual deals primarily with two Series 3000 devices;
the Series 3000 Cassette Tape Controller (CTC) and the Series
3000 EIA System. The former is a general purpose CTC which
can be interfaced to various systems, and the latter is an EIA
compatible version of the CTC with added operator keyboard,
remote control capability and EIA RS-232-C plug-to-plug inter-
faces. Both devices are available with either desk top enclo-
sure (Figures 1-1, 1-2) or rack mountable enclosure (Figure
1-3).
The ensuing paragraphs in this Section describe the two Series
3000 devices and their functions in more detail.
1-1

SERIES 3000 Service Manual
General Description
1.1.1
1-2
Series 3000 Cassette Tape Controller Unit
The Series 3000 Cassette Tape Controller Unit is a general pur-
pose unit designed for interfacing to a variety of devices such
as data communications terminals and small or medium size
computers or for use in special systems applications.
FIGURE 1-1 3220 CTC UNIT, DESK TOP VERSION
The unit is equipped with transport(s) configured either for 5 ips
or 12 ips read and write operations. Both (5 ips and 12 ips) trans-
port types can perform read and write operations on either of two
tape tracks.
The Series 3000 CTC is composed primarily of the following sub-
assemblies:
One (Model 3120) or two (Model 3220) TT120 Tape Transports
Power Supply Assembly
Controller Logic Assembly
Front Panel Controls
User Designed Interface

1.1.2
SERIES 3000 Service Manual
General Description
Series 3000 CTC options include:
HIGH SPEED SEARCH which allows the user to
access any file directly by file address at an
average speed of 120 ips e
VACUUM TAPE CLEANER which removes particles
of dirt, dust, and oxide deposits with every pass of
the tape.
CARRYING CASE which allows units in desk top con-
figuration to be easily transported.
FIGURE 1-2 3220 EIA SYSTEM, DESK TOP VERSION
WITH INTEGRAL KEYBOARD
Series 3000 EIA System
The Series 3000 EIA System is designed to function in a data com-
munications enviroment. It can function as a stand-alone commu-
1-3

SERIES 3000 Service Manual
General Description
1-4
nications terminal in either a manual or unattended mode. The
unit has keyboard control for local operation and can also be op-
erated remotely by means of user selected codes sent from either
an associated I/O device or directly from the communications line.
The unit is equipped with transports configured to operate at 5 ips
during read/write operations, utilizing a single •080 inch wide tape
track. The keyboard may be integral to the unit or the optional
peripheral type illustrated in Figure 1-4. The unit is plug-to-plug
compatible with equipment interfaced in accordance with EIA Stan-
dard RS-232-C and CCITT (European). Two interfaces are avail-
able: one for direct connection to operator oriented devices such
as CRT display terminals, and one for connection to a remote de-·
vice, usually via a communications link. Each of these interfaces
has a separate baud rate selector switch.
FIGURE 1-3 3220 EIA SYSTEM, RACK MOUNTABLE VERSION
WITH lliTEGRAL KEYBOARD
Standard operational features of the basic Series 3000 EIA System
include Off-Line Operation; 110, 150 and 300 baud operation; Re-
wind, Clear, Send, Load, Mark, File and End keyboard functions;
Start Send, Stop Send, Start Receive, Exit Receive, Reset, Char-
acter Delete, Line Cancal and Store Record remote commands.

SERIES 3000 Service Manual
General Description
FIGURE 1-4 PERIPHERAL KEYBOARD ASSEMBLY
The Series 3000 EIA System is composed primarily of the fol-
lowing subassemblies:
One (Model 3120) or two (Model 3220) TT120 Tape Transports
Power Supply Assembly
Controller Logic Assembly
Basic Front Panel Controls
Keyboard Assembly (either Integral or optional Peripheral)
EIA Interface Assembly
Rear Panel Controls and Connectors
Series 3000 EIA System options include those listed in Section
1.1.1, plus:
ON-LINE/DEVICE SELECT which provides two
separate keys used for placing either the terminal
or tape unit on-line.
MANUAL SEARCH which provides FORWARD,
BACKSPACE and SKIP keys.
COPY/DUAL which enables dual transport systems
to copy a record, file or complete tape from tape
1 to tape 2, or to write information on two tapes
simultaneously.
1-5

SERIES 3000 Service Manual
General Description
1.2
1-6
CERTIFY which provid~s a key which allows data
to be checked for parity errors. A record, file or
complete tape can be certified. If a parity error
is found, the fault indicator will blink and the trans-
port will stop.
MONITOR which allows the tape unit to record data
communications between the on-line termfu.al and
the modem; also the terminal may monitor data to
the tape unit when the tape unit is on-line.
TAPE which, on a dual transport system, allows
alternate selection of tape 1 or tape 2 from the key-
board.
EXPANDED REMOTE OPERATION OPTION which
provides 16 additional remote commands:
Write File Mark
Write End Mark
Load Point
Load Point, Send to End
Retransmit
Send Record
Escape
Tape 1 Select
Tape 2 Select
Terminal Select
Tape Unit Select
Start Transparent Receive
Page
Search and Send
Search and Respond
Enquiry
EXPLANATION OF TERMS
BAUD (or BAUD RATE) - A unit of speed (signal elements per
second) in data commtmications. The term baud is used to
designate the total number of bits (both useful information bits
and position or locating bits) transmitted per second. The total
number of useful information bits only which are transmitted per
second is usually stated as the bit rate in bits per second.