Radio Shack DMP-200 User manual

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Radio Shack's nationwide network of service facilities provides quick, convenient,
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within manufacturer's specifications, including, but not limited to, the
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Shack part found in the equipment, and perform whatever modifications are
necessary to return the equipment to original factory manufacturer's
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PURCHASED FROM ARADIO SHACK COMPANY-OWNED COMPUTER CENTER. RETAIL STORE OR FROM A
RADIO SHACK FRANCHISEE OR DEALER AT ITS AUTHORIZED LOCATION
Jjj
CUSTOMER OBLIGATIONS LIMITED WARRANTY
IfeVs?:
US]
Ir
ACUSTOMER assumes full responsibility that this Radio Shack computer harcware purchased (the "Equipment"), and any copies of Radio
Shack software included with the Equipment or licensed separately (the •Software") meets the specifications, capacity, capabilities,
versatility, and other requirements of CUSTOMER
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Contents
Introduction 1
1/ Description of the DMP-200 3
Top Panel 4
Rear Panel .....5
2/ Setting Up the DMP-200 7
Tractor Installation and Removal *7
How Does the DMP-200 Handle Paper? 9
Paper Loading 9
Ribbon Installation/Replacement 13
Print Function (DIP) Switches 14
Setting the Rotary Switch 16
Connecting the DMP-200 to aPower Source 16
Carriage Movement Test 17
Self-Test 17
Connecting the DMP-200 to aTRS-80 17
Power-Up Sequence 18
3/ Using the DMP-200 (General Printed Operation). .... 19
Control Codes 19
Sending Control Codes from BASIC 20
Data Processing Mode 20
Word Processing Mode ... .
.
21
Graphics Mode 21
Selecting aPrint Mode 21
4/ Print Font Styles and Character Widths 23
Selecting Font Styles 24
Standard Character Font Style 24
Correspondence Quality Font Style 25
Proportional Spaced Font Style 25
Graphic Characters 25
Right Justification 26
Wrap-Around 27
Elongated Characters 27
Bold Characters 28
5/ General Control Codes 29
Line Feed (LF) 29
Carriage Return (CR) 30
Backspace (BS) 30
Setting Top-of-Form and Form Length 31
Form Feed (FF) 31
Ignored or Undefined Codes 31
DMP-200 Buffer Operation 32

6/ Word and Data Processing Modes . . ...35
Superscript and Subscript 35
Repeat Printing 35
Underline Printing 36
Print Head Positioning . . 36
7/ Graphics Mode 39
Printing Graphics Patterns 40
Line Feed 41
Repeat Function 41
Print Density 42
Leaving Graphics Mode 42
Mixing Modes 42
Free Hand Drawing 42
Appendix A/ Control Code Summary 45
Appendix B/ Character Sets 49
Appendix C/ Programming Information 55
Appendix D/ Care and Maintenance 57
DMP-200 Printing Limits (Duty Cycle) 59
Appendix E/ Specifications 61

Introduction
Congratulations for selecting this Radio Shack computer product! The DMP-200 is a
high-density dot-matrix printer which can perform avariety of different printing operations.
For instance, it can print:
•Proportional spaced characters.
•Monospaced characters (Normal, Condensed and Compressed).
•Correspondence Quality characters.
•Graphic characters.
For maximum efficiency ,the DMP-200 operates in three modes:
•Data Processing Mode for fastest output of program listings or data.
•Word Processing Mode for letter-writing or the creation of any text documentation
.
•GraphicsMode for drawing pictures, figures, or graphs.
For word-processing, you'll find the DMP-200's Proportional spaced characters (created on
avariable 15x9 dot-matrix) can produce letter-quality results.
If, however, you need aprint-out that is produced faster, Monospaced characters (created
on an 9x8dot-matrix) are just the thing for you!
In the Graphics Mode, you can use graphic data to draw just about any type of graphic
configuration you desire.
You can use three types of paper with the DMP-200.
•Standard (4"- 10" wide) computer fanfold forms with guide holes. The Printer can also
print one original and up to two carbon-copies
.
•Standard single-sheet typewriter paper for use as an ordinary typewriter.
•Roll paper (8 Vi wide) with a1" core and amaximum diameter of 5".
Other software-controlled features include:
•Bi-directional logic-seeking carriage motion, (uni-directional in Graphic Mode.)
•Full- or Half-Line Forward and Reverse (for printing above or below the *'current' 'line)
and 3/4 Line Feed.
•Underline capability.
•Paper Empty sensor automatically stops the printer so you can replenish the paper.
•Parallel and Serial Interfaces.
and much more
!

1/ Description ofthe DMP-200
Carefully unpack the DMP-200, being sure to locate the Ribbon Cassette, the Paper Tray,
the Roll Paper Holder and the Roll Paper Shaft. Keep the empty box and packing material
just in case you ever need to transport the Printer.
Be sure to remove theprotective blackplastic tubefrom the rear Carriage Guide.
Figure 1. Removing the Black Tube
It's important to become familiar with the DMP-200 before you set it up and begin using it.

Figure 2. DMP-200 (Top View)
^!?WE
:
R
J
0nin
udi^t0r-Th'SIndic3tor wiI1 i^minate when the DMP-^00 is properly
connected and the Power ON/OFF Switch is set to ON. -uu is properly
@i^RT IndicatCfThls lamPwiil »me on when the Printer is out ofpaper when
there is acarnage fault, or when there is some son of electrical problem.
@SSSSnt TES
,
WUCh*^^ SWkCh mUSt be S£t t0 0N"LINE bef0re «he
2JSS£SrHZpnntmg at anytime orto use otherFront Pane! Switches -
©RESTART Switch. When the Printer runs out of paper, pushing this switch resumes
IZl1^- ?eV!0p after comPleti ™another line printing or loading new paSrTen
presses Switch to return the Printer to its statufbefore the out-oKr'cSndition
®fhtswkch^nJenuhiS SWkCh iS pr£SSed 'the paper wil1 advance one line -Holdine
theSwitch down will cause cont.nuous paper feed. The Printer must be OFF-LINE
beforepressing this Switch.
®1™%°N/0FF SwitCh-Pr£SS the white dot t0 tum the P°w"ON.Press the Switch
the other way to turn power OFF. Note that turning the power OFF and ON durin*
operation may cause loss of the current program.
®Print Head Control Lever. Move this Levertowards you (e.g. .move the Print Head
away from the paper) when changing ribbons. If printing is faint, move the Lever away
ZZ^?•* '
*
eP™1"6*1towards the paper); if smudging occurs during printing,
move the Print Head slightly away from the paper

®Platen Pressure Lever. If you are "friction feeding" paper (single sheets or roll papaer),
position this lever toward the rear of the printer to apply pressure on the Platen. If
you are "tractor feeding" (fanfold), position this lever toward the front of the printer.
CD Paper Bail Lever. For optimum print quality ,keep the Bail down on the paper (Lever
toward rear of printer)
.
®Tractor Feed. See Setting Up the DMP-200 for derails on using the Tractor Feed.
©Paper Feed Knob. Turn this Knob to manually advance the paper.
©Paper Insertion Opening. Be sure the paper enters the DMP-200 here (just
underneath the black metal shield).
©Paper Guide Rack. Prop this rack up for single sheet paper feeding, down for fan fold
paper, and remove it for roll paper feeding.
When the Printer stops because it is out of paper, the ALERT lamp will illuminate, and the Printer
automatically goes OFF-LINE. To continue printing press RESTART, then printing will be done
one more line, or insert more paper and press RESTART. The DMP-200 will automatically go
back ON-LINE (and continue printing without loss of data in the print buffer).
Model II users :If aBASIC program stops execution because of aPrinter error, typing:
CDNT (ENTER) after you have put the printer back on-line will cause printing to resume.
However, the entire contents of the print buffer will be printed starting with the current Print
Head position.
®©©
Figure 3. DMP-200 (Rear View)
©Parallel Interface Connector. If your TRS-80 has parallel interface capabilities
,
connect the cable here.
®Serial Interface Connector. If your TRS-80 has serial interface capabilities, connect
the cable here. See Setting Up the DMP-200 for the correct cable for your TRS-80.
®Function Selection (DIP) Switch. The settings of this switch define the printer's use.
©Rotary Switch. This switch selects the character style to be used by the printer.
©Power Cord. Plug the power cord into awall-outlet or approved power strip.

2/ Setting Up the DMP-200
This section will show you how to set up the DMP-200 so you can begin using it as quickly
as possible. This includes:
•Loading paper.
•Replacing aribbon.
•Connecting the DMP-200 to aTRS-80
and more!
The following Start-Up Checklist is asummary of how to set up your Printer. You should
follow this procedure every time you start-up the Printer —notjust the first time.
Find agood spot for your Printer. Be sure to consider:
•The Printer should be placed on asturdy work surface.
•The length of the printer cable will determine how far from the TRS-80 you can place
the Printer.
•Papertakes up space. Be sure to leave enough room forsmooth paper flow.
•Don't place the Printer near noise generators such as refrigerators and industrial
equipment.
Be sure the POWER switch (at left side of Printer) is OFF.
Remove the Top Cover and the packing materials.
Install continuous form fanfold paper, single-sheet paper, or roll paper. Refer to Paper
Loading.
Check the Ribbon Cassette. If it has not been installed, see Ribbon
Installation/Replacement.
Set Front Panel Switches, Rotary Dial and Print Function (DIP) Switch (rear of Printer).
Connect the AC powerplug to a3-wire, 120 volt, 60 Hz grounded AC outlet (220/240v,
50 Hz where the unit is so marked).
Check that the Printer is ready by running the Self-Test.
Connect the interface cable from the TRS-80 to the printer interface connector.
Turn the Power ON and check that the Power On Indicator (on the Front Panel) is
illuminated.
Push the RESTART Switch.
Place ON-LINE/OFF-LINE Switch in ON-LINE position.
Tractor Installation and Removal
This printer can be used with either the Tractor Feed system or the Friction Feed system.
The difference is that the Tractor Feed system is used with paper which has guide holes on
both edges while the paper used with the Friction Feed system does not have these holes.
The Friction Feed system may be used with the tractor installed; however, better
operation can be acheived if it is removed especially with single sheets of paper.

Removing the Tractor
1. Set the ON/OFF Power Switch to OFF.
2. Remove the Top Cover.
3. Hold the back bar of the Tractor (close to the edges) between the thumb and forefinger of
each hand and pull upward to unlock and remove the tractor.
4. Replace the Top Cover.
Installing the Tractor
1. Set the ON/OFF Power Switch to OFF.
2. Remove the Top Cover.
3. Place the front cutouts in the Tractor unit onto the outside studs (see Figure 4), then press
on the rear of the Tractor until the back posts snap into place.
4. Replace the Top Cover.
Figure 4. Installing the Tractor
8

How Does the DMP-200 Handle Paper?
The DMP-200 provides both Tractor Feed for continuous forms and Friction Feed for
single-sheet printing.
Paper Loading
Warning! When loading paper (single-sheets, roll or fanfold) ,be sure the paper correctly
enters the Paper Insertion Opening.
If the paper is correctly loaded, it should enter between the body ofthe Printer and the
Paper Separator. Once the paper is loaded and power is ONrcheck the ALERT Indicator. If
the lamp is illuminated, press the RESTART Switch. If the lamp remains on, the paper is
probably loaded incorrectly
.
If the lamp is not illuminated after the paper is loaded, you mav besin printing (if the power
is ON). 'w
Single-Sheet Paper Loading
We suggest you remove the tractor feed unit before loading single-sheet
paper into the DMP-200.
1. Be sure the Power Switch is OFF.
2. Remove the Top Cover.
3. Gently move the Print Head Control Lever away from the paper.
4. Move the Platen Pressure Lever forward (toward the front of the Printer).
5
.
Insert the paper into the Paper Insertion Opening (underneath black shield) and push
the Release Lever back towards the rear of the Printer. Use the Paper Feed Knob to
advance the paper until it appears between the Platen and the Print Head. (See Figure 5)
6. Move the Release Lever forward and align the paper. Push the Release Lever back
again.
7. Set the Penetration Control Lever to the appropriate position.
•Single-Part Forms. Move the Lever towards the paper as far as it will go.
•Multiple-part Forms. Move the Lever as far as it will go toward the Platen without
smudging the paper. Check for smudging by moving the Carriage back and forth at
each of the Lever settings.
Note: If you use carbon paper or other duplicate form paper with the friction feed
system, take extreme care when setting up and printing out with the paper. Aslight
shifting of paper between the original and the copy could occur resulting in poor
printing or improper registration.
Warning! The Penetration Control Lever must always be as close to the platen as
possible; otherwise damage to the Print Headmay result.
8. Replace the Top Cover.
Note: When the Paper reaches the end of apage, the printer will automatically
stop printing about 2" from the bottom of the page. If you want to print a
few extra lines, press RESTART and another line will be printed. Press
RESTART more and another line will be printed, etc. We do not recommend
that you print more than three extra lines if you are using Friction Feed ^,
(single -sheet).
We do not recommend that you attempt to use the RESTART Switch if the
extra lines require reverse line feeds (superscript or subscript for example).
If you do not want to print extra lines, load anew piece of paper into the
printer and press this switch once. The printer will be restored to the status
just before the "out-of-paper" condition occurred.
PRINTER
! j
Paper
RIGHT
PRINTER
/,
/
'?
Paper ^
WRONG

\IAL
Figure 5. Single-Sheet Paper Feeding
Roll Paper Loading
1. Set the Power ON/OFF Switch to OFF.
2. Be sure that there is enough space on aflat, wide surface behind the Printer for the Roll
Paper Holder.
3. Insert both support arms of the Paper Holder into the two round holes in the top rear o(
the Printer and place the other end of the Holder on the flat surface.
4. Insert the Roll Paper Shaft through the standard 1" roll paper core. Place the Paper
Shaft assembly onto the Holder so that the paper feeds from the bottom of the roll .(See
Figure 6.)
5. Move the Print Head Control Lever away from the Platen. Refer to Figure 7.
6. Move the Platen Release Lever and the Paper Bail Lever forward.
7. Insert the end of the paper into the Paper Insertion Opening, then push the Platen
Release Lever towards the rear of the Printer. Turn the Paper Feed Knob until the paper
appears between the Platen and the Paper Bail.
8. Pull the Release Lever forward and pull out the paper approximately 2". Be sure the
.paper is straight, then push the Release Lever back.
9. Adjust the Paper Guides on the Roll Paper Holder so that there is avery small space
between the guides and the edges of the paper.
10. Move the Paper Bail towards the paper.
1 1
.
Move the Print Head Control Lever as far as it will go towards the Platen.
Warning! The Print HeadControlLever must always be as close to the Platen as
possible to avoidpossible damage to the Print Head.
12. Replace the Top Cover.
Note: The DMP-200 can only use roll paper that is not greater than 5" in diameter.
Radio Shack catalog number 26-1402 is ideal for this printer.
10

Figure 6. Roll Paper Feeding
Figure 7. Roll Paper Installation
Hints and Tips On Single-Sheet Paper and Roll Paper Loading ..
.
•With the paper properly installed, printing will continue until the paper passes the Paper
Empty Sensor. The Printer will then go off-line and the Alert lamp will light. Insert
another piece of paper and turn the Paper Feed Knob to advance the paper. When the
paper is in place, press the RESTART Switch and the DMP-200 will continue printing
from where it left off.
•Remember to set the Platen Pressure Lever to the rear of the Printer while using
single-sheet paper, and keep the Paper Bail down for maximum print quality.
11

Fanfold Paper Loading
The DMP-200 will accept standard fanfold and mailing label strips from 4" to 10" wide. The
paper may be either single or multi-part, up to three pans total.
To load fanfold paper into the DMP-200:
1. Set the Power ON/OFF Switch to OFF.
2. Remove the Top Cover.
3. Move the Print Head Control Lever away from the paper. Refer to Figure 8.
4. Move the Platen Release Lever and the Paper Bail Lever toward the front of the printer.
5
.
Pass the paper through the Paper Insertion Opening .(If the Roll Paper Rack is
installed, pass the paper underneath the center of the rack then through the Opening.
)
Return the Release Lever and turn the Paper Feed Knob to advance the paper.
6. Move the Release Lever towards the front once again and pull out approximately 6" of
paper.
7
.
Raise the clamps on the Paper Feed Sprocket Units. Align the paper guide holes with
the sprockets and snap the clamps back onto the sprockets.
•If the paper guide holes do not fit over the sprockets ,release the lever on the
Sprocket Units, re-position the Unit, then snap lever close. If the paper is stretched
too tightly or is loose and wrinkled, it may not feed through correctly.
•Be sure that the paper is straight (i.e., even across top of page) when it is clamped
onto the sprockets.
8
.
Adjust the Paper Guides on the top rear of the Printer so that there is asmall space
between the Guides and the paper edges
.
9. Adjust the Print Head Control Lever as follows:
•Single-Part Forms. Move the Control Lever toward the Platen as far as it will go.
•Multiple-Part Forms. Move the Lever toward the Platen as far as possible without
smudging the paper. Check for smudging by manually moving the Carriage back
and forth across the paper at each of the Lever settings.
Warning! The PrintHeadControlLever must always be as close to the Platen as
possible, otherwise damage to the Print Head may result.
10. Replace the Top Cover.
Figure 8. Fanfold Paper Loading
12

Hints and Tips On Fanfold Paper Loading ..
.
•Whenever the Tractor Feed is used, the Platen Pressure Lever must be toward the front of
the Printer. For friction feed paper, set the Lever to the rear ofthe Printer to apply
pressure to the paper.
•Be sure that the paper is positioned so that it can travel through the printer without
binding.
•Do not let paper pile up on top of unprinted paper or printed paper may be pulled back
into the Paper Insertion Opening. This could jam the paper feed or damage the Printer.
Ribbon Installation/Replacement
If the Ribbon Cassette is already installed, simply check to see that it is properly threaded
between the paper and Print Head. See Figure 9.
If the Ribbon Cassette is not installed, or if it must be replaced due to excessive wear, faint
printing, etc. ,follow this procedure:
1
.
Set the Power switch to OFF. (Note: When you turn the power OFF, any information
stored in the Printer's buffer will automatically be lost.)
2. Remove the top Cover and gently move the Print Head Control Lever towardthe front
of the Printer as far as it will go
.
3
.
Gently grasp the Print Head towards the center of the printer.
4. To remove the used Ribbon Cassette, grasp the Cassette by the edges nearest to the
platen and lift it upwards.
5. Before installing the New Cassette, tighten its ribbon by turning the knob on the
Cassette in direction indicated by the arrow.
6. Gently press the Cassette down until it is firmly secured by the "stopper claws/'
Do not force the Cassette into place !If the Cassette is not properly fitted, the Cassette
knob will not match up with the shaft from the Carriage. Do not force the Cassette
down but fit it in gradually while turning the Cassette knob in the indicated direction.
7. Once the new Cassette is installed, gently slide the ribbon in between the paper and the
Print Head. Tighten the ribbon by turning the Cassette knob in the indicated direction.
8. Move the Carriage back and forth manually to check that the ribbon advances properly.
If the ribbon has not been properly fitted between the paper and Print Head (i.e. ,into
the Print Head Ribbon Guide Bezel) ,the Ribbon feed will not operate smoothly.
9. Move the Print Head Control Lever towards the rear of the Printer.
10. Replace the Top Cover.
Remember! It is extremely important that the Print Headis as close to the paper as
possible; otherwise damage to the PrintHeadmay occur. Tofind the proper distance
,
move the PrintHeadControl Lever towards the paper and move the Carriage back and
forth until smudging occurs. Then gradually move the Control Lever awayfrom the
paper until the smudging stops.
13

Figure 9. Ribbon Cassette Installation
Print Function and Character Selection
Switches
There are two switches at the right rear of the Printer; one DIP Switch and one Rotary
Switch. These switches allow you to customize some ofthe DMP-200 features for your own
applications.
Setting the Print Function Switch (DIP switch)
When you receive DMP-200, all Switch positions should be set to OFF (i.e. ,in the down
position). By setting certain DIP Switch positions ON, before turning the DMP-200'
s
power ON, you can select different processing modes, interface modes, baud rates, etc.
Table 1defines the DIP switch settings. These switches establish the power up defaults for
the DMP-200.
14

Pos. Symbol OFF ON
NUCR
DP/WP
1200/
600 BPS
Parallel/
Serial
Not Used
Not Used
Not Used
generates
"CR +LF"
operation
Data Processing
Mode
1200 Baud trans-
mission rate
for serial
interface mode
Parallel interface
mode
CR causes
Carriage Return
operation only
Word Processing
Mode
600 Baud trans-
mission rate for
serial interface
mode
Serial interface
mode
European/ European Symbol Japanese KANA set
KANA set selected in will be selected
the codes A0 through in the codes A0
BF(Hex) through DF (hex)
Table 1
Remember! The Printerpower must be OFF beforeyou change any ofthe Switch
settings.
WP Serial Not used Not used
CR
ID
600BPS KANA
UDUU
Not used
Uu
345678
Nl_ I2008F5 European Not used
ON SIDE
OFFSIDE
DP Parallel Not used Not used
Figure 10. Function Switch Settings
15

Setting the Character Selection Switch (Rotary Switch)
This switch selects the desired character pitch (i.e. ,number ofCharacter Per Inch —CPI)
.
This is also referred to as character spacing since the DMP-200 adjusts the space between
the font style characters you have selected. Always set the Switch when the power is OFF.
When the Printer is switched ON, the rotary switch condition is recognized and the initial
character style set into memory. Table 2describes the Rotary Switch settings.
CHARACTER SELECTION SWITCH SETTINGS
Position Character Style
Standard 10 CPI
1Compressed (Elite) 12 CPI
2Condensed 16.7 CPI
3Proportional
4
Correspondence ,„ -™
>10 CPI
Quality
j
5
6
7
8Standard 10 CPI
9Compressed (Elite) 12 CPI
Table 2
WjJ
Figure 11.Rotary Switch Set For Normal Printing
Connecting the DMP-20Q to aPower Source
Before plugging the power cord into an AC power outlet, check the following:
Is Printer Power ON/OFF Switch set to OFF?
Have you removed the black plastic protective tube from the Carriage Guide?
Don't connect the Printer to the Computer yet.
Connect the AC power plug to a3-wire, 120 volt, 60 Hz grounded AC outlet (220/240v, 50
Hz where the unit is so marked) or an approved power strip such as the Radio Shack Plug-In
Power Strip (6 1-26 19) or the Automatic Power Controller, SW-301(26- 1429)
.
16

Carriage Movement Test
The Carriage Movement Test allows you to check that the Carriage moves freely from one
end of the Platen to the other and that the Platen is turning properly.
Printing is not performed during the Carriage Movement Test.
1
.
Set the ON-LINE/OFF-LINE Switch to ON-LINE.
2. Press and hold the RESTART Switch while setting the Power Switch to ON. The
Carriage will move back and forth, performing aLine Feed at the end of each line.
3
.
Turn the power OFF to end the Carriage Movement Test.
Self-Test
The DMP-200 has a''built-in' *self-test feature which lets you check printing quality and
general printer operation before you connect the Printer to aTRS-80. This is agood time to
check that the Print Head is adjusted properly (printing is neither too faint or smudging
occurs) and if the paper is feeding properly.
*
Printing character font styles will be selected in accordance with Character Selection
Switch setting.
Before running the Self-Test, however, always be sure to load the DMP-200 with 10" wide
paper since the Test prints from one end of the Platen to the other. Printing on the Platen can
shorten the life ofthe Platen and the Print Head.
To run the Self-Test:
1.* Plug the Printer into an AC power outlet.
2. Set the ON-LINE/OFF-LINE Switch to OFF-LINE.
3. Press and hold the RESTART Switch.
4. Set the Power ON/OFF Switch to ON.
The Printer will begin printing all the characters that it's capable of printing.
5. If the printing is too light, gently move the Penetration Control Lever towards the paper.
If printing is too dark or begins smudging, move the Penetration Control Lever away
from the paper slightly.
6. Printing will continue until you turn the power OFF.
Connecting the DMP-200 to the TRS-80
Before making any connections between the Printer and TRS-80, be sure all units are off!
You must also be sure you have the correct cable for your TRS-80 if the DMP-200 is to
operate properly. Table 3describes the printer cables Radio Shack provides; Table 4
provides quick instructions for printer connection locations.
1
.
Attach the molded male end of the cable to the connector at the left rear ofthe Printer.
Do not force the plug. If it doesn't fit one way, turn it over and try again.
2. Connect the other end ofthe cable to the Printer Jack ofyourComputer. See your
TRS-80 owner's manual for specific instructions.
17