Radio Shack 26-1154A User manual

LINE PRINTER n
Catalog Number
26-1 154A
mmmm\
USS

NOTE
The purpose of this manual is twofold. It provides the owner with complete
adjustment procedures and it provides Radio Shack Service Personnel with
complete repair procedures.
If you are not technically inclined, do not attempt to repair your Printer. If
you do, you'll void your warranty.

TABLE OF CONTENTS
SECTION 1
INTRODUCTION
Section
1.1 SCOPE
1.2 GENERAL DESCRIPTION
1.3 PHYSICAL DESCRIPTION
1.4 FUNCTIONAL DESCRIPTION
1.5 SPECIFICATIONS
SECTION 2
INSTALLATION
2.1 INSPECTION
2.2 INTERFACE INFORMATION
2.2.1 Printer Interface Connector .
2.2.2 Interface Connector Pin-Outs .
2.2.3 Interface Drivers and Receivers .
2.2.4 Interface Communication and Timing
2.2.5 Host-Generated Control Codes .
2.2.6 ASCII Code Charts
2.3 AUTO LINE FEED ENABLE/DISABLE ....
2.4 CHARACTER SET SELECTION
SECTION 3
THEORY OF OPERATION
3.1 BASIC DESCRIPTION
SECTION 4
MAINTENANCE
4.1 GENERAL
4.2 PREVENTIVE MAINTENANCE
4.3 OPERATOR TROUBLESHOOTING
Page
1-1
1-1
1-2
1-4
1-7
2-1
2-1
2-1
2-2
2-2
2-3
2-4
2-5
2-9
2-9
3-1
4-1
4-1
4-3
-l-

TABLE OF CONTENTS (cont'd)
Section Page
4.4 FUSE REPLACEMENT 4-4
4.4.1 Removal of Covers 4-4
4.4.2 Fuse Replacement 4-6
4.5 DETAILED TROUBLESHOOTING 4-7
4.6 GENERAL CLEANING AND LUBRICATION 4-10
SECTION 5
ADJUSTMENTS
5.1 INTRODUCTION 5-1
5.2 TOOLS AND ACCESSORIES 5-1
5.3 PRINTHEAD GAP ADJUSTMENT 5-2
5.4 PLATEN ADJUSTMENT 5-2
5.5 ROTOR/HALL EFFECT SENSOR ADJUSTMENT 5-3
5.6 LINE FEED SOLENOID ADJUSTMENT 5-3
5.7 PRINT DENSITY (SPEED) ADJUSTMENT 5-4
SECTION 6
REMOVAL AND REPLACEMENT
6.1 SCOPE 6-1
6.2 MECHANISM ASSEMBLY 6-1
6.3 PCB LOGIC BOARD 6-3
6.4 LINE FEED SOLENOID ASSEMBLY 6-5
6.5 CARRIAGE RACK, MOLDED .6-5
6.6 BASE COVER ASSEMBLY 6-7
6.7 BODY COVER ASSEMBLY 6-7
6.8 HEAD CARRIAGE ASSEMBLY 6-9
6.9 PLATEN ASSEMBLY. 6-10
SECTION 7
SUPPORTING ILLUSTRATIONS
-ii-

TABLE OF CONTENTS (cont'd)
SECTION 8
ILLUSTRATED PARTS BREAKDOWN
Section Page
8.1 INTRODUCTION 8-1
8.2 ABBREVIATIONS 8-1
8.3 MECHANICAL PARTS BREAKDOWN 8-4
8.3.1 Figure and Item Number 8-4
8.3.2 Part Number 8-4
8.3.3 Description 8-4
8.3.4 Quantity 8-4
8.4 ELECTRICAL PARTS BREAKDOWN 8-22
8.5 NUMERICAL INDEX LIST 8-27
8.5.1 Part Number .8-27
8.5.2 Description 8-27
8.5.3 Figure and Item Number 8-27
8.5.4 Quantity 8-27
APPENDIX A
ADJUSTABLE PIN-FEED DRIVE ROLLER
-ill-

LIST OF ILLUSTRATIONS
Figure Page
1-1 Printer Assemblies 1-3
1-2 Pictorial Schematic 1-5
2-1 Top View of Printer Interface Connector 2-1
2-2 Interface Drivers and Receivers 2-2
2-3 Interface Timing 2-4
2-4 ASCII Code Chart (U.S.A., France) 2-6
2-5 ASCII Code Chart (United Kingdom, Germany) 2-7
2-6 ASCII Code Chart (Italy, Sweden/Finland) 2-8
2-7 Setting Auto Line Feed and Character Set Switches .... 2-9
3-1 Line Printer II Basic Block Diagram 3-1
3-2 Line Printer II Character Styles 3-3
3-3 Interface Timing 3-4
3-4 Acknowledge Timing on Power-Up 3-5
4-1 Replacement of Fuse F1 4-5
6-1 Mechanism Assembly Replacement 6-2
6-2 Logic Board Replacement 6-4
6-3 Line Feed Solenoid Replacement 6-6
6-4 Carriage Rack Replacement 6-6
6-5 Base and Body Cover Assembly Replacement 6-8
6-6 Head-Carriage Assembly Replacement 6-10
6-7 Platen Assembly Replacement 6-11
7-1 PCB Part No. 63669422 Schematic Diagram 7-2
7-2 PCB Part No. 63669416 Scrematic Diagram 7-3
8-1 Line Printer II Major Assemblies 8-4
8-2 Body Cover Assembly 8-6
8-3 Mechanism Assembly 8-8
8-4 Printer Head/Carriage Assembly 8-12
8-5 Left/Right Side Plate Assemblies 8-14
8-6 Base Cover Assembly 8-16
8-7 Paper Roll Holder Assembly 8-18
8-8 Main Acoustic Kit 8-20
8-9 Logic P.C.B. Assembly 8-22
-IV-

SECTION 1
INTRODUCTION
1.1 SCOPE
This manual contains detailed information on the installation,
theory of operation, maintenance, and adjustment of the Radio Shack Line
Printer II dot-matrix printer. The contents of the manual are for use by
qualified service personnel who have been trained to maintain and repair
electronic and electromechanical equipment. Care must be exercised when
servicing the printer to avoid possible damage to the printer or injury to
personnel.
1.2 GENERAL DESCRIPTION
The Line Printer II is an operationally simple, compact, microprocessor
controlled, dot-matrix, impact printer. The unit prints 7x7 dot matrix
characters at 10 or 16.7 characters per inch in line lengths up to 8inches at
arate of 100 characters per second. The printer features three-way paper
handling.
(1) 91/2-inches (9-inches pin-to-pin) wide standard computer fanfold
forms, with fixed position pins to ensure pinfeed paper registration.
The paper can be multipart up to three parts.
(2) Rolled paper, 31/2-to 81/2-inches wide, 1-inch core and up to 5-
inches diameter. The printer includes aroll paper holder. A
built-in rip-and-read cutting edge allows easy removal of paper.
The first line of following page is printed within five lines of
tear edge. Two ply paper may be used with operator attendance.
(3) Single sheets of 81/2-inch wide paper, hand fed as with an
ordinary typewriter.
The printer contains six dip switch selectable character sets of the
following countries: U.S.A., France, United Kingdom, Germany, Italy and
Sweden/Finland. Characters are printed at up to 80 characters per line in the
10 cpi character density and up to 132 characters per line in the 16.7 cpi
character density. Elongated characters are double-width characters and can
be printed in either the 10 cpi or 16.7 cpi character density.
Other significant features include:
(1) Reliable free-flight head.
(2) Microprocessor technology.
(3) Full line buffer.
(4) Fast carriage return at 10 inches per second.
(5) Special line feed buffer for host-controlled forms control.
(6) Compact size (5-inches high x14 1/2-inches wide x11-inches
deep)
.
1-1

1.3 PHYSICAL DESCRIPTION
Aprinter mechanism, printed circuit board, cover assembly set, and
holder for roll paper comprise the major assemblies of the printer. See
Figure 1-1.
The three cover set provides structural support and consists of a
base cover, abody cover, and atop cover. The base cover supports the
printed circuit board and the printer mechanism. The body cover fits over and
around the base cover and contains aflat tray for the ribbon. It also houses
the ribbon drive motor and gear mechanism. The top cover snaps into the body
cover and prevents contact with the print mechanism and electronics. Printed
paper exits through aslot in the rear of the cover which has aserrated edge
to provide atear bar for removing printed pages.
The printed circuit board (pcb) contains all the printer electronics
including an "on board" DC power supply with an input transformer, filter
capacitors, and fuse. The pcb fits underneath the printer mechanism and is
approximately the same size as the bottom cover although the electronic
circuitry requires only about one-third of this area. This allows the printed
circuit input edge card connector, which protrudes from the bottom rear of the
printer, to be an integral part of the pcb for increased reliability. It also
allows the POWER ON/OFF and ONLINE/OFFLINE switches, which protrude from the
bottom front to be mounted directly on the pcb.
The printer mechanism consists of aleft and right end plate which
secure the carriage assembly shafts and carriage rack, the platen, and the
paper feed roller assemblies. Asolenoid attached to the left end plate
provides the drive for paper movement. The solenoid is mechanically linked by
apawl which engages aratchet on the paper feed roller. When the solenoid is
energized the paper feed roller is rotated incrementally resulting in a
forward (upward) movement of paper one-sixth inch (4 mm) or one line.
The carriage assembly is driven back and forth on the carriage
shafts by the drive motor pinion gear which engages the rack. The print head
is transported along the platen by the motion of the carriage assembly. A
flexible cable connects the drive motor and print head solenoids to the
pcb.
1-2

00899
PAPER EXIT SLOT
ONLINE/OFFLINE
SWITCH
SERRATED
EDGE
PRINTED
CIRCUIT
BOARD (PCB)
BODY
COVER
PRINTER ASSEMBLY
POWER
ON/OFF
SWITCH
Figure 1-1. PRINTER ASSEMBLIES
1-3

1.4 FUNCTIONAL DESCRIPTION
Figure 1-2 is apictorial diagram of the Line Printer II. All of
the logic, control, and power supply circuits are contained on the logic pcb
(printed circuit board) .The printer employs amicroprocessor located on the
logic pcb to control printer operation. Under program control the micro-
processor controls the receiving of input data from the host device, monitors
printer status, initiates and controls movement of the carriage assembly,
controls printing by the print head, and controls paper movement. It monitors
the position of the print head at all times and provides printer status
information to the host device.
The host device transmits 8-bit parallel (ASCII) data and adata
strobe signal to the printer logic pcb. Control of the transmission of data
between the host device and the printer accomplished using the acknowledge
(ACK) ,BUSY, and DEMAND signals. Data transmitted by the host device is
strobed into the logic pcb circuits by the DATA STROBE signal. The printer
responds by sending aBUSY signal to host device indicating printer is opera-
ting on the data. After processing the data the printer sends an acknowledge
signal to the host and the BUSY signal is discontinued. The DEMAND signal is
the inverse of the BUSY signal and when present indicates to the host that the
printer is not busy and can accept data.
The input data applied to the printer consists of character data and
control code data. Character data is stored in an input buffer until the data
is to be printed. Control codes are interpreted as instructions by the
printer and provide the means for host control of the printer.
Input character data is stored in the input buffer until the buffer
is full, or until acarriage return (CR) control code is received. ACR
control code is interpreted as aprint command by the printer. Receipt of a
CR control code by the printer intitiates printing of the contents of the
input buffer. Printing is also initiated when the input buffer becomes
full. In the 10 cpi mode buffer full is 80 characters while in the 16.7 cpi
mode buffer full is 132 characters.
Characters are printed by selectively energizing the print head
solenoids which in turn activate the pins of the print head which are arranged
in acolumn. As the print head is moved across the paper the appropriate pins
are activated driving them against the ribbon paper, and platen to form
characters in a7x7 dot matrix.
The print head is mounted on the carriage assembly. Printing occurs
only when the carriage is moved from left to right. When the printer is
turned on and after printing each line, the print head is moved to the left
side of the printer mechanism. The carriage assembly is driven by areversible
dc motor mounted on the assembly. When aprint command (CR) is received the
motor is energized, the carriage assembly is moved in the forward direction,
and the contents of the input buffer is printed. As the carriage assembly
moves, an encoder wheel (which has magnets imbedded in it) is rotated. The
column sensor (Hall effect device) senses when each of the magnets moves past
it and generates column sense signals which are used to synchronize the
print head solenoids. Upon completion of printing aline of data, the polarity
of the dc voltage applied to the carriage drive motor is reversed and the
carriage assembly is moved to the left side of the printer.
1-4

Figure 1-2. PICTORIAL DIAGRAM
1-5

Paper is automatically moved up one line after each line is printed
or whenever aline feed (LF) control code is sent by the host device. When a
line feed is to be executed, the line feed solenoid is momentarily energized
which causes the paper feed roller to move the paper one line. The automatic
line feed function may be disabled. However, if this function is disabled,
the host device must transmit at least one LF command prior to sending aprint
command (CR) or afull line of character data or overprinting will occur.
Line feed (LF) commands may be intermixed with input character data
and multiple line feed commands may be sent by the host device. Aspecial
line feed buffer is provided which can store up to 255 pending line feeds.
The initial line feed received causes an immediate advance of one line.
Because of the time required to execute aline feed is relatively long (160
milliseconds) with respect to the input data rate (9300 characters per second)
subsequent line feeds are stored as acount in the line feed buffer. All line
feeds are executed prior to printing the line of data.
The printer uses aMobius strip ribbon configuration which allows
printing on the upper and lower portions of the ribbon on alternate passes of
the ribbon thereby increasing ribbon life. The ribbon drive motor (ac) is
energized at all times except when the print head is at the left-most position.
This insures proper movement of the ribbon through the ribbon path and compen-
sates for the movement of the print head in both forward and reverse directions.
1-6

1.5 SPECIFICATIONS
1-1. The specifications for the Line Printer II are contained in Table
Table 1-1. Specifications
Ribbon (12 per box)
Paper
Printing Speed
Characters Per Line
Print Width
Character Structure
Line Feed Buffer
Line Feed Repeat Rate
Vertical Spacing
Horizontal Spacing
Parallel Data Input Connector
Parallel Interface Cables
Code
Character Set
Input Character Format
Input Data Rate
Input Voltage/Frequency
Power Requirements
Size
Weight
15-yard zip pack Mobius strip
Cut Sheets (8 1/2-inches wide)
Rolls (3 1/2-inches to 81/2-inches wide x5-inches
diameter with 1-inch Core) ,2ply
Fanfold (9-inches pin-to-pin) ,3ply
28 lines per minute (1pm) at 80 characters
per line (cpl) or 74 1pm at 20 cpl left justified
80 maximum @10 cpi/132 maximum @16.7 cpi
8inches maximum (204 mm)
7x7 Dot Matrix
Capacity for 255 pending line feeds.
9linefeeds/second
6lines per inch
10 characters per inch/16.7 characters per inch
40-pin PC edge connector
Maximum length: 10 feet
Type: Twisted pair
Gauge: 26 AWG
Standard ASCI1-2
Dip switch selectable for U.S.A., France,
United Kingdom, Germany, Italy and Sweden/Finland
8parallel data bits.
Up to 9300 characters/second.
120 Vac +_10% 60 Hz
100 Watts
14 1/2-inches Wx11 -inches Dx5-inches H;
(368 mm) x(279 mm) x(127 mm)
12 pounds (5.4 Kg)
1-7

SECTION 2
INSTALLATION
2.1 INSPECTION
Visually inspect the printer for signs of damage received during
shipment. Notify the common carrier immediately of any discrepancies.
NOTE
Any attempt to operate adamaged printer voids
the warranty and may cause further damage.
2.2 INTERFACE INFORMATION
2.2.1 PRINTER INTERFACE CONNECTOR
A40-pin printed circuit edge-card connector located at the left rear
of the printer provides the means for connecting the printer to an input
device. The physical and electrical characteristics, pin orientation, and
connector pin-outs of the printer interface connector are shown below.
COVER OUTLINE K15° TYP
0.02x45°
CHAMFER
PIN 40 I
f
0.75
0.035 KEY BETWEEN
PINS 36 &38
PINS ON .100 M-s
0.88
Figure 2-1. TOP VIEW OF PRINTER INTERFACE CONNECTOR
2-1

2.2.2 INTERFACE CONNECTOR PIN-OUTS
Table 2-1 shows interface connector pin numbers and the input and
output signals at each pin.
Table 2-1 .Printer Interface Connector Pin-Outs
PIN SIGNAL PIN
1DATA STROBE 2
3DATA BIT 14
5DATA BIT 26
7DATA BIT 38
9DATA BIT 410
11 DATA BIT 512
13 DATA BIT 614
15 DATA BIT 716
17 DATA BIT 818
19 ACKNOWLEDGE (ACK) 20
21 BUSY 22
23 ALWAYS LOGIC (GROUND) 24
25 ALWAYS LOGIC 1(+5V) 26
27 SIGNAL GROUND 28
29 NOT USED 30
31 SIGNAL GROUND 32
33 CHASSIS GROUND 34
35 +5V SIGNAL (P.S. ON) 36
37 NOT USED 38
39 NOT USED 40
SIGNAL
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
TWISTED PAIR GROUND
NOT USED
ALWAYS LOGIC 1
GROUND
PIN 32 JUMPERED TO PIN 34
FOR SENSING PRINTER CONNECTED
DEMAND
NOT USED
NOT USED
(DATA STROBE)
(DATA BIT 1)
(DATA BIT 2)
(DATA BIT 3)
(DATA BIT 4)
(DATA BIT 5)
(DATA BIT 6)
(DATA BIT 7)
(DATA BIT 8)
(ACKNOWLEDGE)
(BUSY)
(DEMAND)
2.2.3 INTERFACE DRIVERS AND RECEIVERS
Figure 2-2 illustrates the requirement for drivers and receivers used
in the interface. All levels are TTL compatible.
LO =0.4 volts HI =2.4 volts
@ 400ua
@16ma
O<LO =0.4 volts HI =2.4 volts
@7ma @O.Oma
IK t>
DRIVER RECEIVER 00844
All input/output signals are TTL compatible.
Figure 2-2. INTERFACE DRIVERS AND RECEIVERS
2-2

2.2.4 INTERFACE COMMUNICATION AND TIMING
The paragraphs below describe the interface communication signals.
Figure 2-3 illustrates the interface timing.
Data Strobe (Host Generated)
The data strobe (DATA STROBE) signal is anegative going pulse which
is used to transfer the incoming data from the host into the electronic
circuitry of the printer. The pulse duration must be aminimum of one micro-
second. The relationship of the leading and trailing edges of the DATA STROBE
signal with the leading and trailing edges of the input data signals must be
as shown in the interface timing diagram (See Figure 2-3)
.
Data Lines (Host Generated)
The eight input data lines provide the means to transfer bits 1
through 8of the ASCII character data and control code data. The presence
of logic 1bits is indicated by positive going signals.
Acknowledge (Printer Generated)
The acknowledge (ACK) signal is anegative going signal which indi-
cates that the printer has processed the latest data transferred from the
host .No new data can be sent to the printer until the leading edge of the
ACK pulse has occurred. If the printer receives acarriage return (CR)
control code, or if the printer print buffer or line feed buffer becomes full,
the acknowledge pulse will not occur until after the line has been printed or
until the line feed buffer becomes only partially full.
Busy (Printer Generated)
The BUSY signal is apositive going signal which indicates the time
when the printer cannot accept new data. The BUSY signal goes positive on the
trailing edge of every data strobe pulse and remains high until the leading
edge of the acknowledge pulse. No new data can be sent to the printer while
the BUSY signal is high.
Demand (Printer Generated)
The DEMAND signal is the inverse of the BUSY signal. When high
(positive) ,the DEMAND signal indicates that the printer can accept data.
+5V Signal (Printer Generated)
The +5V signal (I/O Connector, Pin 35) indicates that the +5V power
supply is operating in the printer. The +5V signal is intended to be used for
signal purposes only and it must not be used to provide power to external
equipment
.
2-3

DATA BIT 1-8 J.nin Imin [
II
«1us
min >\
-1us ,Xl us »
mm |min
1
hlus
min
00840
i(
DATA STROBE *100us 11 HI
±5us <(
1
ACK !r50ns
max 1
5us>u
'±0.! s*"
BUSY 50ns J
max "—
\)—
H-•-50ns
DEMAND
*100 usee is for data reception and line feeds that
do not fill the line feed buffer. For line feeds that
fill the buffer, the time is 11msec +10%, -0%.
For carriage return codes, the maximum time is
2.6 seconds. In approximately 10% of the data
transfer cycles (strobe to ACK cycles) amicro-
processor interupt occurs which extends the busy
time from anominal 100 usee to approximately
200 usee.
Figure 2-3. INTERFACE TIMING
2.2.5 HOST-GENERATED CONTROL CODES
Control code data is sent to the printer along with character code
data via the input data lines. Control codes are sent as data, but are
interpreted as instructions by the printer. Asummary of the control codes
and control code sequences recognized by the printer is shown below. Each of
the control codes is described in detail in the following paragraphs.
Function
Full Line Feed Forward
Print Command
Start Elongated Characters
Stop Elongated Characters
Select 10 cpi Character Density
Select 16.7 cpi Character Density
Mnemonic Decimal Octal Code Hex Code
LF 10 012 0A
CR 13 015 0D
ESC SO 27,14 033,016 1B,0E
ESC, SI 27,15 033,017 1B,0F
ESC, DC3 27,19 033,023 1B,13
ESC, DC4 27,20 033,024 1B,14
Line Feed (LF) Code
Each line feed (LF) code received by the printer causes the paper to
be advanced one line. Line feed codes are received at the same rate as
character data (up to 9300 characters per second.) When multiple line feed
codes are sent to the printer, the initial line feed code is acted upon
immediately and the additional line feed codes are stored in the line feed
buffer as acount. If more than 255 lines feeds are received the printer will
go BUSY, and no more data can be sent to the printer until pending line feeds
have been processed and the line feed buffer is partially full. Line feed
codes and character data can be intermixed, however all line feeds in the
buffer will be processed before the next line is printed.
2-4

Carriage Return (CR) Code
The carriage return (CR) code serves as aprint command to the printer.
Data is received by the printer and stored in the print buffer until aCR code
is received. Upon receipt of aCR code, the contents of the print buffer are
printed. If the print buffer is filled, aCR code is generated by the printer
and the line is printed. The print head is returned to the left margin after
the content of the print buffer is printed.
ESC, SO; ESC, SI Code Sequence and Data Bit 8Control
The ESC, SO code sequence (or bit 8logically high) initiates printing
of elongated characters (doublewidth characters.) The ESC, SO code sequence
may be sent to the printer at any time during the transmission of aline of
character data (up to 40 characters.) Reception of an ESC SI code sequence
(or bit 8logically low) causes all data following the code sequence to be
printed normal size. The end of aprint line terminates printing of elongated
characters. The next line of data will be printed as standard-width characters
unless an ESC, SO code sequence is received during the transmission of the
character data for that line.
ESC, PCI; ESC, DC3 Code Sequence
The primary character density is 10 cpi, selected by the printer
logic during initialization, or by ESC, DC3. The ESC, DC4 code sequence
selects the 16.7 cpi character density. The print buffer is set to 80 char-
acters for 10 cpi and 132 characters for 16.7 cpi. The 16.7 cpi character
density is deselected by sending an ESC, DC3 code sequence or at the end of a
print line.
2.2.6 ASCII CODE CHARTS
Figures 2-4 through 2-6 are the ASCII code charts showing the 96
ASCII characters for the six different character sets, the codes for the
various characters, and the control codes recognized by the printer.
2-5

-%. %\%\1°o 1°1 1io \
k\ b4b3
t
b2
t
^Column
1234567
NUL DLE Space I? P4- p
11SOH DC1 11AQaa
12STX DC2 2BRhr
113ETX DC3 *3CSc s
14EOT DC4 *4DTdt
115ENQ NAK •/. 5EUeu
1 1 6ACK SYN 86FVfV
11 1 7BEL ETB 17GWGu
18BS CAN <8HXhy^
119HT EM )9IYiy
1110(A) LF SUB *:JZJZ
11 1 11 (B) VT ESC +?Ktk<
1112(C) FF FS rL. \11
11113(D) CR GS -=H3M>
1 1 1 14(E) SO RS .>N*|-| -»
111 1 15(F) SI US /?<- O
CONTROL
CODES
A. U.S.A.
STANDARD
~%. On
°0 °°1 %\\\11\
kA b4
t
b3
t
b2
t
^\Column
1234567
NUL DLE Space n*P-p
11SOH DC1 1iAQ a Q
12STX DC2 2BRhr
113ETX DC3 f. 3 C Scs
14EOT DC4 *"> DTdt
115ENQ NAK •/. 5EUeu
116ACK SYN X b FVfV
1 1 1 7BEL ETB '7 G WGw
18BS CAN (8HXh
119HT EM )9IYiy
1 1 10 (A) LF SUB *:J7. Jz
11111 (B) VT ESC +tK°k£
1112(C) FF FS fLC1d
11113(D) CR GS -=M5M£
1 1 1 14(E) SO RS •NAn
111 1 15(F) SI US /-> o
CONTROL
CODES
B. FRANCE
STANDARD
Figure 2-4. ASCII CODE CHART
2-6