Centronics 101 User manual

MODEL 101 PRINTER
MAY 1978
Centronics No. 37400010
Rev. H
I:EnTROnll:S
data computer corp.
HUDSON, NEW HAMPSHIRE 03051
TELEPHONE (603) 88_3 -0111

MODEL 101 PRINTER
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 [phone]

TABLE OF CONTENTS
SECTION 1
INTRODUCTION
SECTION
1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
4.1
4.2
4.3
4.4
4.5
4.6
4.7
General Description.
Logic
Flow Diagram
Printer Operation
1.3.1 Character Printing
1.3.2
Paper Movement .
1.3.3 Special Functions
Specifications Summary
Physical Description
SECTION 2
AND 3
INSTALLATION AND OPERATION
Site Preparation . . . . . . . .
Shipping Crate. . . . . . . . .
Paper Guide and Stacker Assembly.
Introduction . . . .
Basic Timing . . . .
Initializing the
Printer.
4.3.1 Prime Circuit
4.3.2 Select Circuit
Loading Data . . .
4.4.1 General
4.4.2 Data
Strobe.
4.4.3 Acknowledge
4.4.4 Busy Timing
SECTION 4
THEORY OF OPERATION
4.4.5 Clocking I
nput Data Into the Buffer
4.4.6 Function Decoder .
Character Printing . . . . . . . . .
4.5.1 Initiating the Printer Operation . .
4.5.2 Print
Head Motion . . . . . .
4.5.3 Character Registration
and Timing
4.5.4 Character Generator (ROM)
4.5.5 Print
Head Operation ....
4.5.6 Power Driver Circuit . . . . .
4.5.7 Terminating the Printing
Operation.
Paper Movement . .
4.6.1 Line
Feed
4.6.2 Form Feed
4.6.3 Vertical Tab
4.6.4 Vertical Format
Unit
4.6.5 Line Feed Solenoid Driver
Special Functions
4.7.1
Bell.
2.7.2 Delete. . . "
PAGE
1-1
1-2
1-3
1-3
1-4
1-5
1-6
1-7
. . 2-1,
. . 2-2
.2-3/2-4
4-1
4-3
4-3
4-4
4-6
4-8
4-8
4-8
.4-10
.4-10
.4-12
.4-14
.4-16
.4-16
.4-18
.4-18
.4-21
.4-21
.4-22
.4-24
.4-24
.4-25
.4-25
.4-27
.4-27
.4-29
.4-29
.4-29
.4-31

TABLE OF CONTENTS (Cont'd)
SECTION
4.8
5.1
5.2
6.1
6.1.1
6.2
6.3
6.4
6.5
4.7.3
Paper Empty . . . . . . . . . . . .
4.7.4
Motor Control (Optional) . . . . . . .
Power Supplies . . . . . . . . . . . .
.. .
4.8.1 +5V Regulator (Schematic No. 63011143) .
4.8.2 +12V
and -12V Regulators (Schematic No. 63002308)
4.8.3 +35V Power Supply, Unregulated (Schematic No. 63002307).
SECTION 5
REMOVAL, REPLACEMENT AND ADJUSTMENT PROCEDURES
Introduction . . . . . . . . .
Mechanical Assemblies . . . .
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
5.2.8
5.2.9
5.2.10
5.2.11
5.2.12
5.2.13
Cover
(A). . . . . .
Carriage Mechanism (HA)
Driving Mechanism (HB) .
Spring Drum (HC) . . .
Damper (HD) . . . . . .
Frame
(HE). . . . . .
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 Assemblies
SECTION 6
MAINTENANCE
Electrical Adjustments (model 101/101A)
Video
Amplifier Adjustment (Series 101)
Mechanical Adjustments . . .
Preventive Maintenance
(P .M.)
Recommended Tools .
Troubleshooting Guide . . .
SECTION 7
DRAWINGS
AND PARTS LISTS, ELECTRICAL
SECTION 8
DRAWINGS
AND PARTS LISTS, MECHANICAL
APPENDIX A
SIGNAL GLOSSARY
APPENDIX B
PARALLEL INTERFACE SPECIFICATIONS
ii
PAGE
·
4-31
· 4-31
· 4-35
. 4-35
4-37/4-38
4-37/4-38
5-1
5-1
· 5-1
5-2
5-5
.5-14
.5-14
.5-15
.5-19
.5-21
.5-24
.5-28
.5-34
.5-34
.5-35
6-1
6-1
6-1
6-2
6-3
6-4

LIST OF ILLUSTRATIONS
FIGURE
PAGE
. Modell 01 Printer (Front Cover Removed) .
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
2-1
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
4-30
5-1
5-2
5-3
5-4
1-2
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
5-13
5-14
Basic Block Diagram
Print
Head Components . . .
Printing the Letter (H)
Paper Movement Mechanism .
Left Front View of 101 Printer
Right
Front View of 101 Printer. .
Rear View of 101 Printer . . .. ....
Rear View (101 Electronics Cavity Removed) .
Printer Dimensions . . . . . . . . . .
Moder1
01 Functional Block Diagram. .
Functional
Flow Chart
Basic Timing Circuit
Prime Timing . . . .
Prime Circuit . . . . .
Select Circuit . . . .
Input Data Timing -No Busy Condition .
Data I nput Circuit . . .
Acknowledge Circuit . .
I
nput Data Causing Busy.
Busy Circuit . . . . .
Function Decoder . . .
Character Printing Block Diagram
·
1-3
· 1-4
· 1-4
1-4
1-8
· 1-8
1-9/1-10
. 1-9/1-10
·
2-1
· . 4-1
.... 4-2
· 4-3
· . 4-4
4-5
. . . . 4-7
· 4-8
4-9
·4-11
·4-12
..4-13
.4-15
·4-16
.4-17
Forward
and Reverse Clutch Drive Circuits.
Character Timing. . . . . . . . . .
Character Registration
and Timing Circuit
Normal
and Elongated Characters
. . . . . .4-19
Solenoid Positions, 1 through 7
Print
Head Timing . .
Power Driver Waveform
Line
Feed Circuit
Line
Feed Timing
Form
Feed and Vertical Tab Circuit
Form
Feed and Vertical Tab Timing
Bell Circuit . .
.. .... . . .
Paper Empty . . . . . . . . .
Location
of Motor Control Circuit . .
Motor Control Board Interconnection Diagram . .
Motor Control Timing. . . . . . . . .
Power Distribution Diagram . . . . . .
Model
101 Series Drive Train ~ . . . .
Main
Motor Drive and Belt Arrangements . . . .
Bushing End Play Adjustment
for Preload Clutch Shaft (HB-50)
Location
of Left Reed Switch (Top View) . . . . . . . . .
Bushing End-Play Adjustment
for Preload Clutch Shaft (HB-50)
Flexible Timing
Fence Mpunting, Series 101 . . . . . . . .
Fence Adjustment and Optic Housing. . . . . . . . . . . . .
Vertical
and Horizontal Alignment of single Channel Optics Housing. . .
Location
of Left Reed Switch (Top View) . . . .. . . . . . . . .
4-20
.4-21
.4-22
.4-22
.4-23
.4-25
.4-26
.4-27
.4-28
.4-30
.4-32
· .. 4-33
·
.. 4-33
·
.. 4-34
· . 4-36
· 5-5
·
5-7
· 5-11
· 5-12
· 5-13
· . 5-16
· 5-17
· 5-18
Removal
of Belt (32) Idler Slide (28), and Drive Pulley (26) . . . . . . . . .
Adjustment
for Paper Holder Gate . . . . . . . . . . . . . . .
· . 5-19
· 5-22
.5-23
.5-24
· 5-27
Maintaining
5/8 IN. (15.9 MM) Nominal Print Margin ....... .
Two Adjustment, Gear with stop Cam (H H-23) and Inside Cam (H H-14)
Ribbon
Feed Mechanism (Rear of Printer, Left Side) . . . . . . . .
iii
· .
5-31

LIST OF ILLUSTRATION (cont'd)
FIGURE
5-15 Backlash Adjustment, Bevel Gear (HI-43, 59)
5-16 Driving
SI ide Shaft A - Adjustment .
5-17 Ribbon Reversing Rod
Adjustment. . . .
5-18 Ribbon
Reverse Timing . . . . . . . . .
7-1 Schematic Diagram, Electronic Card No.1 (Sheet 1 of 3)
7-2 Schematic Diagram, Electronic
Card No.1 (Sheet 2 of 3)
7-3 Schematic Diagram, Electronic
Card No.1 (Sheet 3 of 3)
7-4 Schematic Diagram, Electronic Card
No.2 (Sheet 1 of 2)
7-5 Schematic Diagram, Electronic Card No.2 (Sheet 2 of 2)
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, Diagram, +5V Regulator . . . .
7-9 Schematic Diagram, ±12 V
Regulator. . . . . . .
7-10 Schematic Diagram, Video
Amplifier ....... .
7-11 Schematic Diagram, Elapsed Time Indicator (Optional)
7-12 Schematic Diagram, Multitap Transformer
50/60 Hz .
7-13 Schematic Diagram,
Motor Control. . . . . .
7-14 Wiring Diagram, Printer Mechanism. . . . . .
7-15 Interconnecting Diagram; Connector Board
7-16 Schematic Diagram,
LED Tape Reader (Optional)
7-17 Component Board Assembly, Electronic Card
No.1
7-18 Component Board Location, Electronic Card No.2
7-19 Component Board Assembly, +5 Volt Regulator.
7-20 Component Board Assembly, ±
12V Regulator
7-21 Component Board Assembly, Connector Board
7-22 Component Board Assembly, Power
Driver. . .
7-23 Component Board Assembly, Video
Amplifier
7-24 Component Board Assembly, Elapsed Time Indicator (Optional)
7-25 Electronic Cavity Assembly. . . .
7-26
W1 Harness Assembly . . . . . .
7-27
W2 Cable Assembly, Computer Input
7-28 W3 Power Cable Assembly . . . .
7-29 Component Board Assembly,
Motor Control (Optional) .
7-30
Harness Assembly, Motor Control .
8-1 Mechanical Subassemblies Series 101
8-2 Cover Assembly A . . . . . . .
8-3 Carriage Mechanism
HA . . . . .
8-4 Drive Mechanism
HB (Part 1) Series 101
8-5 Drive Mechanism (Preload Clutches), (Part 2) Series 101
8-6 Spring Drum HC
8-7 Damper HD. . . . . .
8-8 Frame
HE . . . . . .
8-9 Paper
Feed Mechanism HF
8-10 Pin Feed Mechanism (Left and Right) HG
8-11 Form Feed Mechanism HH . . . . . .
8-12 Ribbon
Feed Mechanism HI .....
8-13 Electrical Hardware HJ (No Illustration) .
8-14 Print
Head and Associated Assemblies. .
iv
PAGE
.5-31
.5-32
.5-33
.5-33
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
· .7-21
.7-23
.7-25
.7-27
.7-29
· 7-31
.7-3:
.7-35
.7-37
.7-39
.7-41
.7-43
.7-45
8-3
8-5
8-7
8-9
·
8-11
.8-13
.8-15
.8-17
· .8-19
.8-21
.8-23
.8-25
.8-27
.8-28

SECTION 1
INTRODUCTION
This manual describes the Model 101 printer, manufactured by Centronics Data Computer
~orporation. It provides general information, detailed theory of operation and maintenance infor-
mation enabling field service personnel to service the printer. For serial input or other detailed
interface information, a separate document for each interface is published for your reference.
The manual is subdivided into eight sections, each with its specific purpose.
SECTION 1 -
SECTION 2-
SECTION 3-
SECTION 4-
SECTION 5-
SECTION 6-
SECTION 7-
SECTION 8-
INTRODUCTION, introduces the reader to the scope and content of the
mar'1ual, and provides the reader with a general description of the printer.
INSTALLATION, contains unpacking and installation instructions for the
printer.
OPERATION, describes the use of all operator controls and indicators.
THEORY OF OPERATION, contains a detailed description of each major
operation performed by the printer electronics, including flow charts, timing
diagrams and circuit diagrams.
REMOVAL, REPLACEMENT AND ADJUSTMENT PROCEDURES,
includes, step-by-step removal and replacement procedures of all major
assemblies and sub-assemblies in the printer.
MAl NTENANCE, includes electrical adjustments, preventive maintenance
procedures, and a troubleshooting guide.
ELECTRICAL DRAWINGS AND LIST OF MATERIALS, contains a com-
pleteset of schematic, wiring and component board layout diagrams and
their associated list of materials for the electrical portion of the printer.
MECHANICAL DRAWINGS AND PARTS LISTS, includes all printer as-
sembly drawings and their associated parts lists for the mechanical portion
of the printer.
APPENDICES - '(A) Signal Glossary
(8) Parallel Interface Specifications
1.1 GENERAL DESCRIPTION (FIGURE 1-1)
The Model 101 printer is a medium speed impact printer which uses a "5 x 7 dot matrix for
character generation.
The unit prints at a rate of 165 characters per second, which is approximately one full 132-
character line per second (including carriage return time). Paper is sprocket-fed, and paper widths
from 4 inches to 14-7/8 inches can be accommodated. The printer can produce one original and
four copies. Standard print format consists of 10 characters per inch horizontally and 6 lines per
inch vertically.
1-1 Rev.G

Figure 1-1. MODEL 101 PRINTER (FRONT COVER REMOVED)
1.2 LOGIC FLOW DIAGRAM (FIGURE 1-2)
The standard printer contains a 132-character buffer. For serial data inputs, optional serial
interfaces allow
data to be received at rates from 100 to 9600 baud. Several other optional inter-
faces
are available as required by the user ..
Once a line of printable characters is stored in the buffer, head motion is initiated by act-
ivating
the forward clutch, causing the print head to move from left to right across the paper. With
the head in motion, data is transmitted from the buffer to the character generator. From there,
character write pulses are sent to the driver circuits, which energize the print head solenoids causing
the print wires to form the characters on the paper.
Paper
movement is initiated by a line feed, vertical tab or form feed function. Vertical
forms movement is hardware - controlled by a vertical format unit (VFU) which controls vertical
spacing
by monitoring two channels in. .a punched paper tape.
In addition, the printer recognizes the following special control codes: bell, delete and
elongated character, as described in Section 1.3.3.
Rev.G
1-2

TIMING
FENCE
DA TA --r--...-t
INPUT
VFU TAPE
READER
A
OPERATOR ALARM
PANEL
CONTROL
1.
PRINT COMMAND
(CR OR LAST CHAR.)
2.
PAPER MOVEMENT
(LF, VT, FF)
3.
SPECIAL FUNCTIONS
(BELL, DELETE, EXP.
CHAR)
MEMORY
HEAD MOTION
CONTROL
PAPER MOTION
CONTROL
TIMING
WRITE
PULSES
Figure 1-2. BASIC BLOCK DIAGRAM
1.3 PRINTER OPERATION
CLUTCH
PAPER
MOVEMENT
SOLENOID
PRINT
HEAD
Basically, all printer functions can be grouped into one of the following three catagories:
1) character printing, 2) paper movement, and 3) other auxiliary functions such as bell, delete, etc.
1.3.1 CHARACTER PRINTING (FIGURE 1-3,1-4)
A small aluminum carriage supports the print head assembly .. During printing operation, the
carriage travels along the print line from left to right. Printing is accomplished by selectively firing
the print wires as the print head moves from left to. right across the print line. Printing impulses
energize the print solenoids and drive ·the print wir~s- against the ribbon, paper and platen
to form the characters in a dot matrix pattern. When the solenoids are de-energized, the wires are
withdrawn so they are flush with the surface of the jewel. Each solenoid .can fire independently
up to fives times for anyone character. Figure 1-3 shows an example of the dot matrix forming
the letter H. Character formations for the standard 64 ASCII set are shown in the Series 100
Operators Manual. Other available character sets are shown in Printer Character Sets brochure
(No. C332-20).
The print head (Figure 1-4) consists of the jewel, casting and seven solenoids with attached
print wires. The seven pr.int solenoids and their attached print Wires are arranged radially around
the print head. The free ends of the print wires pass through a wire guide at the front of the print
head, which properly spaces the wires so that the correct wires pass through the correct holes in the
print jewel.
Printing action is initiated when the input buffer has been filled or a carriage return (CR)
code has been received. The print head then sweeps across the page until a CR command is decoded
at the buffer output or the head reaches the 132-column limit switch. At this time, the print head
returns to the left margin and an automatic line feed is performed. As an option, the automatic
line feed can be disabled.
1-3
Rev. G

PRINT
HEAD
JEWEL
Figure 1-3. PRINTING THE LETTER (H)
1.3.2 PAPER MOVEMENT (FIGURE 1-5)
A
PRINT WIRES
A~
Figure 1-4. PRINT HEAD COMPONENTS
Paper can be moved manually by rotating the platen knob or automatically by any of three
paper movement commands: line feed, vertical tab
and form feed.
Figure 1-5. PAPER MOVEMENT MECHANISM
Rev. G 1-4

A small independent motor not shown in Figure 1-5, provides the power necessary to move
the sprocket-feed tractors which control paper movement. To move the paper, the printer electronics
energizes a line feed solenoid which activates a clutch that mechanically links the motor to the
sprocket-feed tractors.
To initiate a single line feed, the line feed solenoid is momentarily energized. Upon completion
of the line feed command, a delay interval is generated. Allowing the clutch pawl and clutch mech-
anism to return home before another line feed is allowed.
Vertical forms movement is accomplished by continuously energizing the paper feed solenoid
until a hole is detected in the Vertical Format Unit (VFU) paper tape. The p'aper tape uses two
tracks: one used for Top of Form and the other for Vertical Tab. The movement of the paper
tape is caused by direct mechanical linkage to the gear train which drives the paper feed tractors.
When the printer runs out of paper, a sensing switch activates a two-second audible tone in a
speaker located at the rear. The printer also stops printing and lights the PAPE R EMPTY light on
the control panel.
1.3.3 SPECIAL FUNCTIONS
In addition to the printable characters shown in Appendix B, the printer can recognize the
following special functions:
.Carriage Return (Octal 015) -Initiates the printing of a line.
Form Feed (Octal 014) -Moves the paper until the next hole in Tape Reader Channel 7 is reached.
Vertical Tab (Octal 013) -Moves the paper until the next hole in Tape Reader Channel 5 is
reached.
Line Feed (Octal 012) -Advances the paper one line.
Delete (Octal 177) -Initializes the printer electronics and clears the buffer.
Bell (Octal 007) -Generates a two-second audible tone in the speaker at the rear of the printer.
1-5
Rev. G

1.4 SPECIFICATIONS SUMMARY
Data Format
Input Code
Data Rate
Buffer
I nput Gating
Printing Method
Dot Matrix
Elongated Characters
Character Density
Print Format
Print Rate
Number of Copies
Character Set
Data Input
Printing
Paper Advance
Slew Rate
Vertical Format
Vertical Format Control
Paper Entry
Paper Feed
Auto Line Feed
Bottom of Form (Opt.)
7-bit parallel interface
64-character ASCII
Up to 75,000 characters/second
One-line character buffer
Data Strobe is normally gated with
acknowledge of previous character
Non-gated strobe available as an option.
Impact, character-by-character
5x7
By line, via octal 016
. 10 characters/inch (horizontally)
132 characters/line (max.)
165 characters per second
Prints original and up to four carbon
copies.
Standard 64-character ASCII, lower case
prints as upper case. Optional sets available.
4 inches/second
6 lines/inch (Std.)
8 or 10 lines/inch (Opt.)
2-channel VFU paper tape
Rear Paper Feed
Sprocket feed, adjustable to 14-7/8 inch
paper
Atltomatic line feed on carriage return
Controlled by VFU tape, causes paper to
advance to top of form.
Controls/Indicators
Rev.G
Switches
Indicators
Manual Controls
Auto Motor Control (Opt.)
Audio Alarm
1-6
ON/OFF, SELECT, FORMS OVERRIDE,
TOP OF FORM
ON/OFF, SELECT, PAPER OUT
Forms Thickness, Paper Advance Knob
Drive motor automatically turns off and on
as required by the incoming data.
Momentarily sounds a buzzer in response to
a Bell code or paper empty condition.

Physical/Environmental/Electrical
Height
Depth
Width
Weight
Temperature -Operating
Storage
Humidhy- Operating
Storage
Input Voltage
11.4" (28.2 cm)
20" (50.8 cm)
27.7" (70.3 cm)
118
Ibs. (53.5 kg)
40° F to 100° F (4° C to 37.5° C)
-40° F to 160° F (-40° C to 71° C)
5 to 90% (no condensation)
Oto 95%
115
VAC ± 10%,60 Hz (Std.)
230
VAC ±10%, 50 Hz (Opt.)
Other Options
Serial Communications Interface
Popular Parallel Computer Interfaces
Ribbons
The
printer uses a 1-inch nylon ribbon mounted on 3-inch diameter spools.
The
following four colors are available:
Black -Part No. 63002293-5001
Red -Part No. 63002293-5002
Green -Part No. 63002293-5003
Blue -Part No. 63002293-5004
NOTE
Centronics nylon ribbons
are designed specifically for
use in Centronics matrix printers. The fabric design and
proprietary
ink formulation ensures optimum print quality,
as well as long print head and ribbon life. Centronics reserves
the right to void the warranty with regard to any parts damaged
through the
use of non-qualified ribbons.
Paper
The printer uses continuous form paper with standard feed holes on each edge. Paper widths
from 4
to 14-7/8 inches can be accommodated by the printer. Using'multiple-part form, one original
and up to 4 copies can be printed, all very legible. Paper weight specifications are as follows:
Single-Part Forms: 15
to 12 Ib.-
Multiple-Part Forms: Original -12 to 15 lb.
Copies - 9
to 1.2 lb., last copy 15 lb.
(Maximum
of five parts)
Carbon
Paper: 7% lb. with. medium hardness
1.5 PHYSICAL DESCRIPTION
The
printer is approximately 11.4" (28.9 cm) high by 20" (50.8 em) deep by 27.7" (70.3 cm)
wide,
and weighs approximately 118 I bs. (53.5 kg.).
Figures 1-6
to 1-9 show various photographic views of the printer taken with the covers removed.
All major assemblies and components are identified in the table below the photo.
1-7
Rev. G

1.
2.
3.
4.
1. Print Head Assembly
4. VFU Tape Reader 7. Spring Drum
10. Timing Fence
2. Carriage 5. Pin Feed Mechanisms 8. Platen
Knob
11. Main Drive Belt
3. Form Feed Mechanism
6. Ribbon Feed Mechanism 9. Damper
Figure 1-6. LEFT FRONT VIEW OF 101 PRINTER
Operator Control Panel
Form Feed Motor
Video Amplifier & Cable Assembly
Optic Block
5.
6.
7.
8.
Ribbon Cable
Power
Driver Board
Penetration
Control Knob
Forward Clutch
9. Main Pulley & Drive Belt
10. Reverse Clutch
11. Cooling Fan
12. Ribbon Feed Mechanism
Figure 1-7. RIGHT FRONT VIEW OF 101 PRINTER
Rev. G 1-8

1.
2.
3.
Electronics Cavity
Electronic Card 1
Electronic Card 2
4.
5.
6.
4
+5VDC Power Supply 7.
12 VDC Power Supply 8.
+30 Volt Power Supply 9.
Input Connector
Speaker
AC Power Input
Figure 1-8. REAR VIEW OF 101 PRINTER
1.
2.
3.
Main Motor 4.
Motor Starting Capacitor 5.
AC Power Connector 6.
Electronics Connector
Power Transformer
Power Distribution
7.
8.
Figure 1-9. REAR VIEW 101 (ELECTRONICS CAVITY REMOVED)
1-9/1-10
10. Fuses
11. In-Line Fuse
Ribbon Reversing Rod
Ribbon Drive Rod
Rev.G

SECTIONS 2 AND 3
INSTALLATION AND OPERATION
A separate operators manual contains most of the installation, set-up and operating procedures
for the Model 101 printer. This operators manual should be referred to during normal printer
installation and operation.
Included on the following pages is additional information not contained in the operators
manual.
2.1 SITE PREPARATION (FIGURE 2-1)
A line drawing of the printer dimensions is shown in Figure 2-1. As shown in this drawing, the
width of the installation site must take into account the side covers in an opened position.
POWER CORD 0
2'.'" (10.3 ,m) -----I
WEIGHT: 118 POUNDS (53.5 kg.)
Figure 2-1. PRINTER DIMENSIONS
2-1
Rev. G

Environmental and electrical requirements at the installation site are as follows:
Temperature:
Humidity:
Electrical:
2.2 SHIPPING CRATE
40
0
to 1000 F (Operating)
-400 to 1600 F (Storage)
5% to 90% (no condensation) -Operating
0% to 95% -Storage
115 VAC ± 10%,60 Hz
230 VAC ± 10%,50 Hz
The printer is shipped in a crate approximately 20 inches high, 27 inches deep and 32 inches
wide. The crate is made of weatherized, triplewalled cardboard. When properly strapped, the
packing crate and printer is capable of fork lift operati'bn with a seven-high stacking capability.
(1) If a special interface is used, the interface card is included with the printer. For certain
interfaces such as the RS232,oa special cable is also shipped. Cabling requirements for
the standard parallel interface are defined in Appendix B.
(2) A standard vertical format paper tape providing six line feeds (one inch) for each vertical
tab and 66 line feeds (11 inches) for each form feed code. This tape is a part of the
Vertical Format Unit. Refer to the Operators Manual for duplicating the existing tape,
or if a different format is desired, for generating a new tape.
(3) Documentation - All documentation describing that particular printer is included in a
plastic bag under the printer. This documentation includes a technical manual for the
printer andany optional interface, and a notice of all approved changes incorporated
in the printer but not documented in the manual. Please keep this documentation
with the printer at all times so that accurate information will be available for trouble-
shooting purposes.
(4) Pin Feed Knobs -These knobs are contained in a small plastic bag stapled to the guide
bar for the pin feed unit.
(5) Print Sample - A sample printout from that particular printer is included in the upper
paper pan.
(6) Unpacking/Repacking and Set-Up Instruction Sheet.
Shipped in a separate container is the paper guide and stacker assembly. Installation instructions
for this assembly are included with the assembly and also in Section 2.3.
Rev.G
2-2

2.3 PAPER GUIDE AND STACKER ASSEMBLY
The Series
100
paper guide and stack-
er assembly (Part No.
5~7001
001-
5001) can be used with
all
Centronics
Series
100
printers
except
the
Model
104. It
is
designed for use in
both
table
top
or
printer
stand applica-
tions, as shown
in
the
diagram.
To
attach
the
unit
to
a printer, first
remove
the
two
screws from
the
left
and right sides as indicated. Then, in-
stall
the
paper guide and stacker
to
the
back,
top
of
the
printer using
these
four
screws.
Make sure
the
rounded
paper guides
rest on
top
of
the
printer,
in
front
of
the
paper feed opening.
PRINTER
STAND
TRAY
2-3/2-4
PRINTER
STAND
PRINTER STAND
APPLICATION
TABLE
TOP
APPLICATION
Rev.G