Centronics 101AL User manual

TECHNICAL
MIZAINUZATL
MODEL 101AL PRINTER
CENTRONICS
ara OC eaie! OC
CENTRONAICS
data computer corp.
HUDSON, NEW HAMPSHIRE 03051
Centronics
No.
37400050
Rev.C
TELEPHONE
(603)
8383
ts
0111
APRIL 1975

CENTRONICS
centronics data computer corp.
hudson, n.h. 0305!
telephone (603) 883-Oill
eastern region: [phone] (mass.)
central region: [phone] (ohio)
western region: [phone] (calif.) ;
© Copyright Centronics Data Computer Corp.
centronics data computer (canada) Itd.
mississauga, ontario [phone] All rights reserved.
derteariiettn a aeaso melee Patents Pending in U.S.A. and Other Countries
brussels, belgium [phone] (Printed in U.S.A. 4/75)

‘TECHNICAL
MANUAL
MODEL 101AL PRINTER
APRIL 1975
THE INFORMATION CONTAINED HEREIN IS
PROPRIETARY AND IS NOT TO BE RELEASED
OR REPRODUCED WITHOUT WRITTEN PER—
MISSION OF CENTRONICS data computer corp.
CENTRONICS
data computer corp.
HUDSON,
NEW
HAMPSHIRE
03051
TELEPHONE
(603)
883
-
0111

TABLE OF CONTENTS
SECTION 1
INTRODUCTION
Section
1.1 GENERAL DESCRIPTION... ... 1... 1 1 we ee ee we tw et
1.2 LOGIC FLOW DIAGRAM ........... 2 ee ee eevee ee
1.3. PRINTER OPERATION. ....... ee ee ew we ee
1.3.1 Character Printing ........+4+464-0+6006-8 eee
1.3.2 Paper Movement ...... 2. 2. 2 6 ee ee ee ew ws
1.3.3 Special Functions. . .... 1... 2 ee eww ee wes
1.4 SYSTEM FEATURES... .. eee ee ee ee ee ee ne
1.4.1 Features, Standard & Optional Specification Summary. . ,
1.4.2
Specification
Summary
«+
+
+
+
+
eee
ee
ee
ee es
1.5 PHYSICAL DESCRIPTION - +++ +++ +e: ee,
SECTIONS 2 & 3
INSTALLATION AND OPERATION
SITE PREPARATION. . 2... 2 2 1 2 ee we ww we ee we
SHIPPING CRATE. . 2. 1. 1 1 6 ww we ww ew ee ww we te ew
PAPER GUIDE AND STACKER ASSEMBLY. ~~... 1 1 ee ee ee eee
SECTION 4
THEORY OF OPERATION
4,1 INTRODUCTION. . 2. 1. 2 1 1 2 www we ew we ww te ee ee
4.2 BASIC TIMING. . 2. 2. 1 1 ew we we ww we te ee we ee te
4.3. INITIALIZING THE PRINTER. . . 2. 1. 7 2 we ew ee we we wee
4.3.1 Prime. ..... 2... eee nee ee eke ke kas
4.3.2 Select .......2 06.2 6 «© © © © © © © ee we ee th ws
Rev. A

TABLE OF CONTENTS (cont'd)
Section Page
4.4 DATA INPUT. ........... ee ee ew we ee ew 4-6
4.4.1 Data Input Timing. ........2.2.2.2.208080c86-.8 4~6
4.4.2 Busy... 2. 2. 2. ew ew ew we ww te ww he we 4-9
4.4.3. Function Decoder .........6-6246464654c84e88 4-10
4.5 SHIFT REGISTER (BUFFER). ..... be ww ee tw tw we 4-12
4.6 CHARACTER PRINTING. ....... 22. 2 0 ee ee we ee 4-14
4.6.1 Initializing the Printing Operation. ....... 4-14
4.6.2 Character Registration and Timing. ........ 4-15
4.6.3 Character Generator (ROM). .........2... 4-18
4.6.4 Print Head Operation. .......24646404688-8 4-20
4.6.5 Power Driver Circuits. . ...... 26 2 ee eee 4-21
4.7 PAPER MOVEMENT... 2. 2. 2 2 ee ew ee ew we ee we we ee 4-24
4.7.1
Line Feed... ... 1. 2 1 ew we ew tw ww 4-25
4.7.2 Form Feed. ...... 2. 1 eo ee ew ew ew ew ew ww 4-26
4.7.3 Vertical Tab. .........0242484 00 ee ee 4-27
4.7.4 Wertical Format Unit. .......2.0.60464208-8 4-28
4.7.5 Line Feed Solenoid Driver. .........e6.6-. 4-29
4.8 SPECIAL FUNCTIONS. ... . 2... 1 ee ww ew ew et te 4-30
4.8.1 Bell (Optional). ........ 06.6.6 2 ee eee 4-30
4.8.2 Delete... .. 1. 1 ew ew we ew ew we tt te 4-30
4.8.3. Paper Empty. ........ 505656 0 «© we ee eee 4-3]
4.8.4 Motor Control (Optional) ..........0.e-. 4-31
4.9 POWER SUPPLIES ........ 2. © © © we ee we ew ws 4-34
4.9.1 +5V Regulator. .......4.2.2.66.26c86858484 0848 4-36
4.9.2 +12V and -12V Regulators ..........e8e8- 4-37
4.9.3. +35V Power Supply, Unregulated ........... 4-37
4.10 OUTPUTS FROM LSI CHIPS .......... 0404248488088 4-38
4.10.1 Outputs from LSI Chip ME5......2.2.2.2.4.2... 4-38
4.10.2 LSI Chip ME9...........0 2628 2 we eee 4-4)
i1 Rev. A

Section
o.1
9.2
6.1
6.2
6.3
TABLE OF CONTENTS (cont'd)
SECTION 5
REMOVAL,
REPLACEMENT
AND
ADJUSTMENT
PROCEDURES
INTRODUCTION.
MECHANICAL ASSEMBLIES.
AnaInrianinnn
ooo
ot
ND RO AD PO
AO
NAD
NO
NAD [PO
lo NO
lO
PO
WO
CONN
OP
WNMrF
Cover (A) . .
Carriage Mechanism (HA)
Driving Mechanism (HB).
Spring Drum (HC).
Damper (HD)
Frame (HE) . . tk
Paper Feed Mechanism (HF).
Pin Feed Unit (HF). . .
Form Feed Mechanism (HH) .
Ribbon Feed Mechanism (HI)
Electrical Hardware (HJ) .
Paper Stacker and Guide ...
Printer Head and Associated Assemb1 ies
SECTION 6
MAINTENANCE
ADJUSTMENTS . ;
PREVENTIVE MAINTENANCE
TROUBLESHOOTING GUIDE
SECTION 7
DRAWINGS AND PARTS LISTS, ELECTRICAL
SECTION 8
DRAWINGS AND PARTS LISTS, MECHANICAL
APPENDIX A
~1O1AL
SIGNAL
GLOSSARY,
SOURCE
AND
DESTINATION
LISTING
APPENDIX B
STANDARD 9 x 7 64-CHARACTER SET
APPENDIX C
PARALLEL
INTERFACE
SPECIFICATIONS
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6-1
6-3
Rev.

LIST OF ILLUSTRATIONS
Figure Page
1-1 Model 101AL Printer (Top Cover Removed) ........ 1-2
1-2 101AL Printer Logic Flow Diagram. ........... 1-3
1-3 Printing the Letter (H) .........4...28 8888 1-4
1-4 Print Head Components ........4...2.0880868 1-4
1-5 Paper Movement. . . 2. 2. 2 6 ee ee ee ew ew ew ew we 1-5
1-6 Left Front View of 1OIAL........2.2.2.2.2.22.2.4.2. 1-8
1-7 Right Front View of 1O1AL.......2.2.2....28-8 1-8
1-8
Rear View of 1OIAL. ....... 2... ee ee eee 1-9/1-10
1-9 Rear View (101AL Electronics Cavity Removed). .... . 1-9/1-10
2-1 Printer Dimensions. . . 1... 2. 6 ee ww te ee ee 2-1
4-1 Model 1lOIAL- Block Diagram. .........2.2.+4+6-6 4-2
4-2 Prime Timing. . 2... 2 ee ew ew ew ww we ew we we et 4.4
4-3 Input Data Timing - No Busy CondItion......... 4.7
4-4 Input Data Timing - Causing Busy Condition. ...... 4-8
4-5 Character Timing. . ..... 6. © ee we we we we ee 4-16
4-6 Normal and Elongated Characters .........e66-. 4-19
4-7 Print Head Timing . ........ 6.06606 6 «© ee ee 4-2]
4-8 Power Driver Waveform. ........464.4.448888 4-22
4-9 Line Feed Timing ....... 2.6 © © © © we we ee 4-27
4-10 Form Feed and Vertical Tab Timing. .......... 4-28
4-11 VFU Tape Reader Amplifier (located in VFU)....... 4-29
4-12 Location of Motor Control] Circuit. .......4... 4-31A
4-13 Motor Control Assembly Interconnection Diagram. .... 4-31B
4-14 Motor Control Timing. ....... 2... © «© ee we ew 4-33
4-15 Multitap 50/60 Hz Transformer ..........2446-. 4-35
4-16 +5 Volt Regulator Interconnection Diagram ....... 4-36
4.17 12V Regulators Interconnection Diagram ........ 4-38
5-1 Model 101 Series Drive Train .......4.-+ see. 5-8
5-2 Main Motor Drive and Belt Arrangements ........ 5-13
5-3A Bushing End Play Adjustment for Preload Clutch Shaft
(HB-50) a a 5-21
5-3 Flexible Timing Fence Mounting, Series 101. ...... 5-29
iV Rev.

oc
ty yf
meer
Figure
5-4
5-4A
9-5
9-6
5-/
5-9
5-10
5-11
7-1
7-2
7-3
7-4
7-5
7-6
7-7
7-8
7-9
7-10
7-11
7-12
7-13
7-14
7-15
7-16
7-17
7-18
7-19
7-20
7-21
7-22
7-23
LIST
OF
ILLUSTRATIONS
(cont'd)
Pade
Location
of
Left
Reed
Switch
(Top
View),
.......
.
.
5-24
Two
Adjustments,
Gear
with
Stop
Cam
(HH-23)
and
Inside
Cam
(HH-14)
2
ow
ke
ee
5-31
Ribbon
Feed
Mechanism
(Rear
of
Printer,
Left
Side)
.
.
.
.
5-36
Backlash
Adjustment,
Bevel
Gear
(HI-43,
59)
......-
5-37
Driving
Slide
Shaft
A
-
Adjustment...
...
+.
-
»
2»
9738
Ribbon
Reversing
Rod
Adjustment
.-
+--+
see
ete
5-39
Ribbon
Reverse
Timing
.
.
,.,.....2
ee
ee
eee
5-40
Fibre
Optics
Head,
Adjustment
from
Optic
Fence
-
+--+
+e.
5-45
Fibre
Optics
Head
Alignment
and
Flexible
Timing
Fence
,
.
5-45
Schematic Diagram, Logic/P.S. Board +5V (Sheet 1 of 4) . . 7-3
Schematic Diagram, Logic/P.S. Board +5V (Sheet 2 of 4) . 7-4
Schematic Diagram, Logic/P.S. Board +5V (Sheet 3 of 4) . 7-5
Schematic Diagram, Logic/P.S. Board +5V (Sheet 4 of 4) .. 7-6
Schematic Diagram, Power Driver Board (Sheet 1 of 2) . 7-7
Schematic Diagram, Power Driver Board (Sheet 2 of 2)... 7-8
Schematic Diagram, Video Amplifier ............ 7-9
Schematic Diagram, Power Connections 1OIAL........ 7-10
Schematic Diagram, Motor Control .........4.4.. 7-11
Multitap Transformer 50/60 Hz .......46424808-4 7-12
Wiring Diagram, Printer Mechanism ........-2.2.6-4 7-13
Interconnection Diagram, Connector Board and Power Supply. 7-14
101AL Connector Configuration .........60 6488-8 7-15
Component Board Assembly, Logic/P.S. Board +5V — |
(Sheet 1 of 3) 2... ww ee ee ee ee ke ee we 7-17
Component Board Assembly, Logic/P.S. Board +5V
(Sheet 3 of 3) 7 ww wk ee ee ee ee ee ee 7-18
Component Board Assembly, Power Driver .......... 7-23
Component Board Assembly, Video Amplifier. ........ 7-25
Component Board Assembly, Connector Board. ........ 7-27
Component Board Assembly, Motor Control ......... 7-29
Electronics Cavity Assembly ........6 64.4068 7-31
Harness Assembly (W1) ... 2... ee eee ee eee 7-33
- Input Cable Assembly .. 0... eee ee ee ee 7-35
Power Cable Assembly (W3). .... 2.0... 0 ee ee ee 7-37
-\- Rev. B

Figure
8-4
8-1
8-2
8-3
8-3A
g-4
8-5
8-6
8-7
8-8
8-9
8-10
8-12
LIST OF ILLUSTRATIONS (cont'd)
Mechanical Sub Assemblies
Cover Assembly -
Carriage Mechanism .
Drive Mechanism .
Drive Mechanism (Preload Clutches).
Spring Drum
Damper
Frame
Paper
Feed Mechanism . ee
Pin Feed Mechanism (Left and Right)
Form Feed Mechanism.
Ribbon Feed Mechanism .
Print Head and Associated Assemblies .
-Vi-
Page
8-2A
8-3
8-5
8-9
8-11
8-13
8-15
8-17
8-19
8-21
8-23
8-26
Rev.