Manual 19758851
APPENDIX H
PERIPHERAL DEVICES
H.1 OPERATING THE TELETYPE
The ASR-33 Teletype is the basic input/output device for PDP-11 computers. It con-
sists of a printer, keyboard, paper tape reader, and paper tape punch, all of which
can be used either on-line under program control or off-line. The Teletype con-
— trols (Figure H-1) are described as they apply to the operation of the computer.
OFF
REL.
ON
START -
STOP -
FREE -
OFF
LINE (С) коса!
ASR-33 Teletype Console
Figure H-1
+
H.1.1 Power Controls
LINE - The Teletype is energized and connected to the computer as an
input/output device, under computer control.
OFF - The Teletype is de-energized.
LOCAL — The Teletype is energized for off-line operation.
H.1.2 Printer
The printer provides a typed copy of input and output at 12 characters per second,
maximum.
*
H.1.3 Keyboard
The Teletype keyboard is similar to a typewriter keyboard. However, certain opera-
tional functions are shown on the upper part of some of the keytops. These func-
tions are activated by holding down the CTRL key while depressing the desired key.
For example, when using the Text Editor, CTRL/U causes the current line of text to
be ignored.
Although the left and right square brackets are not visible on the keyboard key-
tops, they are shown in Figure H-2 and are generated by typing SHIFT/K and SHIFT/M,
respectively. The ALT MODE key is identified as ESC (ESCape) on some keyboards.
0000000090008
© o0098068600000668
609009000608 066
©0000090609000G
| |
Г ce
Figure H-2
ASR-33 Teletype Keyboard
H.l.4 Paper Tape Reader
The paper tape reader is used to read data punched on eight-channel perforated
paper tape at a rate of 19 characters per second, maximum. The reader controls
are shown in Figure H-1 and are described below.
START Activates the reader; reader sprocket wheel is engaged and
operative.
STOP Deactivates the reader; reader sprocket wheel is engaged but
not operative.
FREE Deactivates the reader; reader sprocket wheel is disengaged.
The following procedure describes how to properly position paper tape in the low-
speed reader.
a. Raise the tape retainer cover.
b. Set reader control to FREE.
c. Position the leader portion of the tape over the read pens with the
sprocket (feed) holes over the sprocket (feed) wheel and with the arrow
on the tape (printed or cut) pointing outward.
d. Close the tape retainer cover.
e. Make sure that the tape moves freely.
| | |
f. Set reader control to START, and the tape will be read.
H.1.5 Paper Tape Punch
The paper tape punch is used to perforate eight-channel rolled oiled paper tape
at a maximum rate of 1% characters per second. The punch controls are shown in
Figure H-1 and described below.
RELease Disengages the tape to allow tape removal or loading.
B.SP Backspaces the tape one space for each firm depression of
the B.SP button. |
ON (LOCK CN) Activates the punch.
OFF (UNLOCK) Deactivates the punch.
Blank leader/trailer tape is generated by:
1. Turning the TTY switch to LOCAL,
2. Turning the low speed punch on (depress ON button),
3. Typing the HERE IS key,
4. Turning the low speed punch off (depress OFF button), or
5. Turning the TTY switch to LINE.
H.2 OPERATING THE HIGH-SPEED PAPER TAPE READER AND PUNCH UNITS
A high-speed paper tape reader and punch unit is pictured in Figure H-3 and des-
criptions of the reader and punch units follow.
H.2.1 Reader Unit
The high-speed paper tape reader is used to read data from eight-channel fan-folded
(non-oiled) perforated paper tape photo-electrically:at a maximum rate of 300
characters per second. Primary power is applied to the reader when the computer
POWER switch is turned on. The reader is under program control. However, tape
can be advanced past the photoelectric sensors without causing input by pressing
| the reader FEED button.
H.2.2 Punch Unit
The high-speed paper tape punch is used to record computer output on eight-channel
fan-folded paper tape at a maximum rate of [email protected] characters per second. All char-
acters are punched under program control from the computer. Blank tape (feed
holes only, no data) may be produced by pressing the FEED button. Primary power
is available to the punch when the computer POWER switch is turned on.
VE
|
/
PAPER TAPE OFF LINE
Tape retainer
A cover control
FEED
ON LINE
FEED
Figure H-3 | =
High-Speed Paper Tape Reader/Punch
1
Paper tape is loaded into the reader as explained below.
l. Raise tape retdiner cover.
2. Put tape into right-hand bin with channel one of the tape toward the
rear of the bin. |
3. Place several folds of blank tape through the reader and into the left-
hand bin.
4. Place the tape over the reader head with feed holes engaged in the teeth
of the sprocket wheel.
5. Close the tape retainer cover.
6. Depress the tape feed button until the leader tape is over the reader
head.
CAUTION
Oiled paper tape should not be used in
the high-speed reader or punch ~ oil
collects dust and dirt which can cause
reader or punch errors.
H.3 The LP11 LINE PRINTER
The LPll is a line printer with 849 column capacity; capable of printing more than
399 lines per minute at a full 89 columns, and more than 1109 lines per minute at
27 columns. The print rate is dependent upon the data and the number of columns
to be printed.
Characters are loaded into the printer memory. via the Line Printer Buffer (LPB)
serially. When the memory becomes full (29 characters) the characters are auto-
matically printed. This continues until the 8g columns have been printed or a
carriage return, line feed, or form feed character is recognized.
H.3.1 Printer Control Panel | | | ; *
Figure H-4 illustrates the printer control panel on which are mounted three indi-
cator lights and three toggle switches.
|
ON LINE
9 6 ©
TOP PAPER OFF LINE
OF STEP
FORM
Figure H-4
Line Printer Control Panel
Operation of the lights and switches is as follows:
POWER light a. Glows red to indicate mäin power switch
| (located inside cabinet) is at ON posi-
tion and power is available to the printer.
READY light
ON LINE light
TOP OF FORM switch
FAPER STEP switch
ON LINE/OFF LINE switch
H.3.2 Maintenance Panel
Glows white, shortly after the POWER light
goes on to indicate that internal compo-
nents have reached synchronous state and
the printer is ready to operate.
Glows white to indicate that ON. LINE/OFF
LINE toggle switch is in ON LINE position.
This switch is tipped toward the front of
the cabinet to roll up the form to the
top of the succeeding page. It is spring-
returned to center position, and produces
a single top-of-form operation each time
it is actuated. The switch is effective
only when the printer is off line.
Operates similarly to TOP OF FORM but
produces a single line step each time it
is actuated. It is only effective with
printer off line.
This two-position toggle switch is spring-
returned to center. When momentarily
positioned at ON LINE it logically connects
the printer to the computer and causes the
ON LINE light to glow. Positioned momen-
tarily at OFF LINE, the logical connection
to the computer is broken, the ON LINE
light goes off, and the TOP OF FORM and
PAPER STEP switches are enabled.
The maintenance panel contains controls used for the line printer's initial set-up
and maintenance. It is accessible only by opening the front cabinet door, located
beneath the control panel.
This panel contains three switches, and three indicators.
1. Main AC power switch;
2. PRINT INHIBIT switch - must be off (down) to enable printing;
3. DRUM GATE indicator - if lit, drum gate not properly locked;
4. PAPER FAULT - if lit, check for no paper, or torn paper;
5, PRINT INHIBIT indicator = if lit, turn PRINT INHIBIT switch off;
6. MASTER CLEAR switch - spring-loaded to off (down); if toggled to on (up),
resets printer logic, turns off READY and ONLINE indicators.
H.3.3 Adjustment Controls
Controls are provided as listed in Table H-1.
Table H-1
Adjustment Controls
Control
Location
Function
Drum gate latch
Tractor paper width
adjustment:
Tractor horizontal
tension adjustment
COPIES CONTROL lever
Paper vertical ad-
justment control
Е]
Top-of-form in-
dicators
Gearshift type knob near
right-hand side of main-
tenance panel.
Setscrew at far right of
tractor pressure plate
behind drum gate.
Next to left side of
tractor paper width
adjustment.
Extreme upper right-hand
corner of cabinet just
above drum gate hinge.
Knob at upper left of
cabinet, directly above
right-hand side of
maintenance panel.
Red arrows visible when
drum gate is swung open
one on each side of.
paper directly below
tractor pressure plates.
Unlocks drum gate
which can then be
swung open for access
to components on back.
Adjusts right tractor
for various paper
widths; left tractor
is factory adjusted.
Adjusts horizontal
tension of paper.
Adjusts the distance
between hammer bank
and character drum
for different numbers
of printed copies.
Settings are: 1-2,
3-4, and 5-6.
Adjusts vertical
alignment of printing
so that it prints on
lined paper. Can be
adjusted to plus or
minus one line and
may be adjusted while
the printer is in
operation.
Aligns paper during
loading.
H.3.4 Loading Paper
Follow the steps listed on the following page to load paper into the printer.
10.
11.
Procedure
Open front door cf cabinet to gain access to maintenance panel and turn main
AC power switch cn. Verify that control panel POWER indicator lights.
Lift control panel TOP OF FORM switch and release to move tractors to correct
loading position. |
Open the drum gate by moving the drum gate latch knob to the left and up.
Swing drum gate open.
Adjust right-hand tractor paper width adjustment for proper paper width.
This is accomplished by loosening the set screw on the 82-column model or
by using the easy release mechanism on the 129-column model. Make certain
that the right-hand tractor is tightened in place after it is adjusted.
Open spring-loaded pressure plates on both tractors.
Load paper so that a perforation is pointed to by the two red arrows (top-
of-form indicators). Paper should lie smoothly between tractors without
wrinkling or tearing the feed holes.
Close spring-loaded pressure plates on both tractors.
Adjust the COPIES CONTROL lever to the proper number for the number of
copies to be made. For example, set to 1-2 for single forms, set to 5-6
for six-part forms.
Close drum gate and lock into position with drum gate latch. After approxi-
mately 108 seconds the contrcl panel READY indicator should light. If it
does not, check to see if any error is indicated. An error is indicated
if one of the following lights is on: DRUM GATE, PAPER FAULT, or PRINT
INHIBIT.
Lift TOP OF FORM switch several times to ensure paper is feeding properly.
Set system to on-line mode by lifting ON LINE/OFF LINE switch and verifying
that ON LINE indicator lights. At this point, printed matter can be aligned
with the paper lines by rotating the paper vertical adjustment knob.
For further details cn the LP11, refer to the LP11 Line Printer Manual,
L'EC-11-OLDPB-A-D.
H-8
H.4 THE [email protected] MAGTAPE DRIVE -
‘The [email protected] is a magnetic tape drive which may be 7- or 9-track unit and which will
record data in densities of 290, 556 or 8909 bits per inch.
Figure H-5 shows the magnetic tape drive control panel and its schematic representa-
tion. Table H-2 shows the meaning assigned to each indicator light and Table H-3
explains the function of each switch.
| LD || END [FILE
LOAD PROT
OFF | |
PWR ON ON-LINE START
PWR OFF OFF-LINE STOP
LOAD - FWD
-—— | | НЕМ =
UNIT :
BR REL SELECT REV
CP-0093
Figure H-5
Magnetic Tape Drive Control Panel
+
Table H-2
Status Indicators
Indicator
PWR
OFF-LINE
LOAD
SEL
FWD
END PT
REV
FILE PROT
Procedure
Indicates that power is being supplied to the drive
unit.
Indicates local operation by the control box.
Indicates that the vacuum system has been en-
abled ard the unit is prepared to accept on-line or
off-line commands.
Indicates the tape transport has been selected by
the controller (program). |
Indicates that the drive is ready to accept requests
for operation (provided the SEL light is also lit).
Indicates that the program has initiated a write op-
eration in the tape transport.
Indicates that the tape mounted on this unit is at
its Load point (BOT marker is being sensed). REW
command is disabled. |
Indicates that a forward command has been issued.
Indicates that the tape mounted on this unit is at
its end point (EOT marker is being sensed), FWD
command is disabled.
Indicates that a reverse command has been issued.
Indicates that the tape may not be written on (no
Write ring in tape reel). |
Indicates that a rewind command has been issued.
H-10
- Table Н-3
Switch Functions
UNIT SELECT
FWD/REW/REV
Switch Function
PWR ON/OFF Controls power to the drive.
ONLINE/OFF LINE Transfers drive control to processor
(ON LINE) or enables local control box
control by operator (OFF LINE).
START/STOP Initiates or terminates tape movement.
LOAD/BR REL LOAD position causes tape to be drawn
into vacuum columns.
Center position applies reel motion
brakes.
BR REL position releases reel motion
brakes.
Assigns a logical unit number (zero
through seven) to this drive.
Selects tape motion direction to be con-
trolled by START/STOP switch. FWD posi-
tion indicates transfer to take-up reel
until EOT (end of tape) marker is sensed,
REV position indicates transfer to file
reel until BOT (beginning of tape) marker
is sensed, REW position indicates transfer
as in REV at a higher tape speed; when the
tape stops at BOT, depressing the start
switch again causes tape to unload.
H.4.1 Operating Procedures
H.4.1.1 Loading and Threading Tape
Use the following procedure to mount and thread the tape:
Procedure
Apply power to the transport by depressing PWR ON switch.
»
Ensure the LOAD/BR REL switch is in the center position
(this applies the brakes) .
“Place a write enable ring in the groove on the file reel
if data is to be written on the tape. _
Ensure there is no ring in the groove if data on the
tape is not to be erased or written over.
Mount the file reel onto the lower hub with the groove
facing towards the back. Ensure that the reel is
firmly seated against the flange of the hub.
CH-11
Step
10
Procedure
Install the take-up reel (top) as described in Step 4.
Place LOAD/BR REL switch to the BR REL position.
Unwind tape from the file reel and thread the tape
over the tape guides and head assembly as shown in
Figure H-6.
Wind about five turns of tape onto the take-up reel.
Set the LOAD/BR REL switch to the LOAD position to
draw tape into the vacuum columns.
Select FWD and press START to advance the tape to
Load Point. When the BOT marker is sensed, tape
motion stops, the FWD indicator goes out, and the
LOAD PT indicator comes on.
NOTE
If tape motion continues for more than 10 -
seconds, press STOP, select REV (reverse)
and press START. The tape should move to
the BOT marker (L.oad Point) before stopping.
H.4.1.2 Unloading Tape
To unload the tape proceed as follows:
Step
Procedure
‘Press OFF-LINE switch if the transport has been operating
in the on-line mode. :
Press STOP switch and select REW.
Press START switch. The tape should rewind until the
BOT marker is reached. |
Press the LOAD/BR REL switch to release the brakes.
+
Gently hand wind the file reel in a counterclockwise
direction until all of the tape is wound onto the
reel. -
CAUTION
When handwinding the tape, do not jerk the reel.
This can stretch or compress the tape which could
cause irreparable damage.
Remove the file reel from the hub assembly.
H-12
TAPE WE
^^
| POSITIVE
` TAPE TENSION
HOLDS TAPE AGAINST
~~ CAPSTAN
TRANSPORT WILL :
AUTOMATICALLY -
SHUT-DOWN ;
‘| HEAD TAPE GUIDES [23 ©
(FAIL- SAFE CONDITION) —
}
a
R/W ERASE HEAD ASSEMBLY
©)
TAPE WILL BE SUPPLIED TO
COLUMN {TAKE-UP
REEL TURNED OFF)
NOTE: TAPE 1S AUTOMATICALLY
DRAWN INTO VACUUM COLUMNS
WHEN LOAD/BR REL SWITCH
* 1S SET TO LOAD POSITION
TAPE GUIDE
‘ ‘
PT +
x `
` X
~ ~
LEFT VACUUM COLUMN
- FILE REEL
TURNED ON
C
-——
TAPE WILL SE EXTRACTED
ROM COLUMN
(TAKE-UP REEL TURNED ON)
TRANSPORT WILL
AUTOMATICALLY
SHUT _COWN———
(FAIL-SAFE CONDITION)
Za
X
\
X
RIGHT VACUUM
> COLUMN
FILE REEL
TURNED OFF
>.
X
«С
VACUUM CHAMBER PORT
(TO VACUUM MOTOR) > N /
~ 7
Figure H-6
Tape Transport Mechanism
H.4.1.3 Restart After Power Failure
In the event of a power failure, the magtape automatically shuts down and tape
motion stops without damage to the tape. Return of power is indicated when the
PWR indicator lights. To restart the transport proceed as follows:
Step | | | | Procedure
1 | Press the LOAD/BR REL switch to release the brakes.
2 Manually wind the reels to take up any slack in the
tape. |
3 Set the LOAD/BR REL switch to the LOAD position to
draw tape into the vacuum columns.
4 — Set ON-LINE/OFF-LINE switch to the desired position
and continue operation.
H.4.1.4 Restart After Fail-Safe
If the tape loop in either buffer column exceeds the limits shown in Figure H-6,
the vacuum system automatically shuts down and tape motion stops without damage to
the tape. When this fail-safe condition occurs, the magtape does not respond
to on-line or off-line commands. To restart the transport, perform Steps 1 through
4 in Section H.4.1.3.
H.4.1.5 Tape Handling
Observe the following precautions when handling magnetic tape:
a.
H.5 THE
Always handle a tape reel by the hub hole; squeezing the reel flanges
can cause damage to the tape edges when winding or unwinding tape.
Never touch the portion of tape between the BOT and EOT markers. Oils
from fingers attract dust and dirt. Do not allow the end of the tape
to drag on the floor. |
Never use a contaminated reel of tape. This spreads dirt to clean tape
reels and can affect tape transport operation.
Always store tape reels inside their containers. Keep empty containers
closed so dust and dirt cannot get inside. | -
Inspect tapes, reels, and containers for dust and dirt. Replace take-up
reels that are old or damaged. |
Do not smoke near the transport or tape storage area. Tobacco smoke and
ash are especially damaging to tape.
Do not place the magtape near a line printer or other device that
produces paper dust.
Clean the tape path frecuently as described in Section H.5.2.1.
TC11 DECTAPE DRIVE
Figure H-7 pictures the TCll DECtape drive unit.
Figure H-7 TC11 DECtape Drive
H-14
To mount a DECtape on the TCll:
1. Move the LOCAL/REMOTE/OFF switch to the OFF position.
2. Mount a DECtape by centering it over the left band hub and pushing it
~ firmly onto the spring loaded hub.
3. Wind sufficient tape to wrap around the recording head guides and the
empty DECtape reel which should be mounted on the right hand hub.
4. Take up a few inches of tape on the right hand hub by hand.
5. Move the LOCAL/REMOTE/OFF switch to LOCAL position.
6. Depress the DECtape motion switch to the LOAD position until about 6
feet of tape are on the right hand hub.
7. Depress the WRITE PROTECT switch or write enable as appropriate.
8. Assure that the unit number showing for this drive does not show on
any other drive.
9. Move the LOCAL/OFF/REMOTE switch to the remote position.
To dismount a DECtape from the TCI11.
1. Move the LOCAL/OFF/REMOTE switch to the LOCAL position.
2. Depress the tape motion switch in the rewind direction (¢) until all
the tape is on the left hand reel. ot
3. Move LOCAL/OFF/REMOTE switch to OFF position.
4. ‘Pull the DECtape reel from the left hand hub.
| X
H.6 OPERATION OF THE LA30 DECWRITER
The LA30 DECwriter is a dot matrix impact printer and keyboard for use as a hard
copy I/O terminal. It is capable of printing a set of 64 ASCII characters at a
speed of up to 38 characters/second on continuous forms. Data entry and system |
control is accomplished from the keyboard, which is capable of generating either
97 or 128 characters.
The DECwriter is available in two models: The LA3ÿS for serial operation and the
LA39P for parallel operation.
H.6.1 Controls and Indicators
Controls and indicators for the LA3ÿ are listed in Table H-4 and shown in Figures
H-8 and H-9. (Figure H-8 shows the controls and indicators for the serial version
of the LA3ß; the parallel version has only the READY lamp and the LOCAL LINE FEED
switch.)
H-15
Table H-4
LA38 Contrcls and Indicators
Index
Control/Indicator
Function
de
READY
LOCAL LINE FEED
MODE LOCAL LINE
BAUD RATE 110,150,300
MOTOR POWER
AC POWER
Lamp - Indicates power up on printer
electronics and that the DECwriter is
READY for use.
Switch - When depressed, causes a
local line feed to be applied to the
printer without a code being sent to
the computer. This control will also
disrupt printing, but no characters
will be lost.
2-Position Switch - Selects either
local or on-line operation.
3-Position Switch - Selects the baud
rate clock frequencies for 110,150,
and 300 baud. |
Breaker (CB2) - Applies power to prin-
ter stepping motor electronics.
Breaker (CB1) - Applies ac power to
the unit power supply.
LENTA UCA REE
de fa dw fe (OK BB BCE AE TE TR
NN A SN AN INR I TL TT
|
|
EU
Figure H-8
[email protected] DECwriter (Serial Machine)
H-16
Figure H-9
LA37 Power Controls
H.6.2 Loading Paper
When loading paper, proceed as follows:
Remove main power at CBl.
Open the cover of the DECwriter by pulling up on both sides of the front.
Raise the cam lever located on the left-hand side of the print bar
assembly until it disengages and slide the assembly back.
Feed the paper from its box on the floor under the DECwriter up through
the opening in the bottom of the base casting (Figure H-10). Pull the
fresh ‘supply into the machine and discard any remnants of the old supply.
Make certain that the paper is feeding straight and re-engage the paper
with its sprocket tractor pins.
Pull the assembly forward and re-engage it by pressing the cam lever
down until it locks in place on its retainer stud. Adjust tractor width,
using vernier knob. Tractor pins ‘should not elongate holes in paper.
Advance the paper by rolling the knobs.
Feed end of paper through the smaller hole in the cover and close the
cover, latching both ball studs to the base assembly.
Re-apply main power at CBI.
H-17
THROUGH
COVER
ENGAGE PAPER
"WITH PINION (HIDDEN)
VERNIER KNOB
$ RIGHT - MARGIN
SWITCH
CAM
LEVER
(HIDDEN)
LEFT- e Du pp
MARGIN = | a J
SWITCH J
PUSH BACK
LEFT -MARGIN-
WARNING
SWITCH
FEED THROUGH
OPENING
IN CASTING
Figure H-10
Paper Loading and Threading Diagram
H.6.3 Changing Ribbon
When it is necessary to change the ribbon, which under normal operating conditions
should be every 10 hours of continuous printing, proceed as follows:
CAUTION
Ribbons left in service for more than 16
hours of continuous printing may function
poorly with possible damage to print head.
%,
1. Wait until the present reel has completely emptied and is ready to
| reverse.
2. Remove main power at CBl.
3. Raise lid and move the platen assembly back as described in Section
H.6.2.
4. Remove ribbon from the idler rollers, the print head, and the direction
reversing sense arms.
5. Snap both reels off of their motor shafts, run the ribbon off of the
most empty reel, and discard the full reel of ribbon.
H-18
{
6. Secure a new reel of ribbon and reel off approximately 1 ft. If the
ribbon is not equipped with a hook at its end, skewer the ribbon on the
arrow-shaped piece on the take-up reel (Figure H-11).
7. Wrap the ribbon on the take-up reel beyond the direction-reversing rivet.
CAUTION
If the rivet is not between the reel and
the sensing arm, the ribbon will not reverse.
8. Snap both reels on their motor shafts and thread the ribbon through the
sensing arms and over the idler rollers and print-head assembly as shown
in Figure Н-12.
FRESH REEL... — TAKE UP REEL
DIRECTION - SKEWER HOOK
REVERSING | RIBBON _OR * RIBBON
RIVET | ON ARROW HERE
CP-0190
Figure H-11 - RIGHT HAND REEL
LEFT HAND REEL ;
NN Securing Ribbon to Reel
RIVET —N —Ua— RIVET
(See note) : (See note)
| | TYPE BAR ВЕ и a
SENSE ARM —>— |— | | | — | —<— SENSE ARM
BE SURE RIBBON LAYS SQUARELY BETWEEN 1
TOP A BOTTOM GUIDES ON |
SIDES OF PRINT HEAD A RELEASE
y LOCK & MOVE BACK a
BARREL - SHAPED
> (O+— GUIDE FREE
| TO ‘ROTATE
O— -
NOTE:
Direction reversing rivets must be on
reel side of sensing afms.
PRINT HEAD
ASSEMBLY ©
EP- 0191
‘Figure H-12
Ribbon Threading Diagram
H-19
H.7 OPERATION CF THE [email protected] ALPHANUMERIC DISPLAY TERMINAL
The [email protected] Alphanumeric Display Terminal, consisting of a CRT display and self-contained
keyboard, can be used as a peripheral I/O device with the PDP-11. Basic operation
of the [email protected] is described in the section that follows; detailed information is
available in the [email protected] Alphanumeric Display Terminal Reference Manual (DEC-00-H4AC-D).
H.7.1 Controls and Indicators
— VTZ5 controls and indicators and their respective functions are listed in Table H-5.
Table H-5
[email protected] Controls and Indicators
Control or Indicator Functions
Power ON/CFF Switch This switch is located on the right front
of the VTZ5. When the ON/OFF switch 15
turned ON, power is applied to the com-
plete system and the [email protected] display refresh
memory is cleared. After approximately
one minute has elapsed, the cursor should
appear in the upper left<hand corner (HOME
position) of the screen.
LOCAL/REMCTE Switch This switch is located on the right front
- of the VT#5. In LOCAL mode, the terminal
is off-line and data transmitted from the
keyboard is applied back to the [email protected] re-
ceiver logic by connecting the transmitter
output to the [email protected] receiver input. In
REMOTE mode, keyboard data is transmitted
from the [email protected] to the processor while the
[email protected] is simultaneously receiving data from
the processor for entry into the buffer
memory (full-duplex operation).
When operating in HALF-DUPLEX mode, if the
VTÿS is transmitting and receiving simul-
taneously, two sets of information are
garbled.
FULL/HALF-DUPLEX Switch This switch is located on the rear of the
VTG5. In the FULL-DUPLEX position, while
keyboard data is transmitted to the compu-
ter, the display can concurrently receive
data from the computer. In the HALF-DUPLEX
position, data is transmitted to the [email protected]
receiver logic as well as to the computer.
In both cases, received data will be recog-
nized and processed by the VTÿ5 (see Figure
H-13).
H-20
Table H-5 (Cont.)
Control or Indicator | Functions
CONTRAST Control | The CONTRAST control is located on the right-
o | hand side of the [email protected] and is used to adjust
for picture contrast (clarity).
BRIGHTNESS Control The BRIGHTNESS control is located on the right-
| hand side of the VTÿ5 and is used to adjust for
CRT display brightness or intensity.
i
NOTE
To correctly adjust the [email protected] character
Presentation, turn the CONTRAST control
counterclockwise to minimum, then adjust
the BRIGHTNESS control decreasing the in-
tensity until the brightness is barely
intensified (just above the CRT cutoff
point). As a final step adjust the CONTRAST
control to the desired level, according to
ambient lighting conditions.
VERTICAL Sync Control The VERTICAL sync control is located on
| | the right-hand side of the [email protected] and is
used to properly synchronize the screen
in the vertical direction.
HORIZONTAL Sync Control The HORIZONTAL sync control is located on
. the right-hand side of the VTY5 and is used
to adjust the picture for proper synchroniza-
tion in the horizontal direction.
BAUD RATE SELECTION Switch This switch is located on the rear of the
[email protected] and has ten positions (see Figure
H-13). The various switch positions and
respective transmit and receive rates are
provided in Table H-6. See Filler Charac-
| — ter Requirements, below. -
EEE DUPLEX SYNC DATA SEY
E SR SATE AIR Io
y
Figure H-13
VTO5 Rear Panel Connectors and Controls
At the 11ÿ-baud rate, an ll-unit code consisting of one start bit, seven data bits,
one parity bit, and two stop bits is used. A [email protected] code is used for all other
baud rates (only one stop bit is used). The parity bit can optionally be set to
~
a "mark" (no parity) or to even parity.
H-21
Table H-6
Baud Rate Selector Switch Positions
Switch Positions Transmit Rate Receive Rate
Fully Counterclockwise ° 110 110
150 150
300 . 300
600 * 600
1200! 1200!
through 2400! 2400!
150! 2400!
110! 2400!
- 150! 1200!
Fully Clockwise | 110! 1200!
lyrgss only; not implemented on [email protected]
H.7.2 Filler Characters Required at High Baud Rates
At speeds above 300 baud, filler characters (or time delay) are required after many
of the control characters transmitted to a [email protected]
Characters Requiring Fillers Above 300 Baud:
Line Feed
Cursor Down
HOME
Cursor Up
Erase Screen
Cursor: Y Address
Filler characters should be null (2070007) as a rule, though other characters may
be satisfactory if direct cursor addressing is not used. (Fillers after Cursor Y .
Address must be null to be interpreted correctly.)
The delay required is slightly greater than one full cycle of the ac line. At both
50 Hz and [email protected] Hz, the number of fillers required to accomplish the delay is:
2400 baud 4
1200 baud 2
600 baud 1
300 baud or less none required
H.7.3 Local Operation Turn-On Procedure
The following procedure is provided for initial turn-on when operating in LOCAL
H-22
mode. Perform step 3 of this procedure only during installation or initial setup,
or in instances when the VTÿ5 must be moved to a different location and a different |
wall receptacle must be used.
Step | | a Procedure
1 Ensure the power switch is set to the OFF position.
2 | | Set the LOCAL/REMOTE switch to the LOCAL position.
3 | Check the selected wall receptacle for the correct line
voltage. Ensure the line voltage and frequency agree with
the line voltage and frequency specified on the rear panel.
Insert the power cord into the wall receptacle.
4 | ВЕ Set the power switch to ON; the blinking cursor will ap-
| ~ pear in the HOME position (the first character position
of the first line), and the speaker will "beep" once.
5 | Allow approximately one minute for CRT filament warmup.
6 If the cursor does not appear as specified, press the
-HOME key. If the cursor still fails to appear, ensure
that the BRIGHTNESS control has not been adjusted too low.
If the cursor still fails to appear, turn the terminal off
and contact the local DEC Field Service Office.
H.7.4 Remote Operation Turn-On Procedure
The following procedure is provided for initial turn-on when operating in REMOTE
mode. Perform step 4 of this procedure only during installation or initial setup,
or if the [email protected] is moved to a different location and a different wall receptacle
must be used.
Step | Procedure
1 ~ Ensure that the power switch is set to the OFF position.
2 Set the DUPLEX switch on the rear panel to FULL or HALF
according to the requirements of the particular system
to which the VTÿ5 is connected.
3 | Set the LOCAL/REMOTE switch to the REMOTE position.
4 | | Check the selected wall receptacle for the correct line
voltage and frequency as specified on the rear panel of
the VT95. Insert the power cord into the wall receptacle.
5 | | Set the power switch to the ON position.
© Allow approximately one minute for CRT filament warmup
before continuing. The blinking cursor should appear
in the HOME position (upper left-hand corner), and the
speaker should "beep" once.
H-23
Step Procedure
7 . If the cursor fails to appear as specified, press the
HOME key. Ensure that the BRIGHTNESS adjustment has not
been turned down. If the cursor still fails to appear,
* о turn the terminal off and call the local DEC Field Service
Office.
8 Set the BAUD RATE switch on the rear panel to the desired
- position.
H.8 CRI11 CARD READER
=
The usual medium of batch input will be the CR11 card reader. Two models are
available for use with Batch: CR-11A and CR-11B. Operating procedures for each
are detailed below.
H.8.1 CRI11-A Card Reader
Figure H-14 illustrates this mode. To operate CR11-A:
1. Turn power switch ON.
2. Remove card-deck weight from input hopper.
3. Place card deck in input hopper. Cards should be face down, with the
= notched corner to your left. Edges of all cards should be aligned
evenly.
4. Replace card-ceck weight on top of deck.
5. Press MOTOR START button.
6. Press READ START button.
The unit is ready for operation if the green lights associated with MOTOR START and
READ START are lit; no red lights should be on, If a red light is on, do not attempt
to enter the BATCH command at the keyboard, because the card reader is not ready.
H-24
Figure H-14
Model CR11-A Card Reader
H.8.2 CR11-B Card Reader
Model CR11-B is shown in Figure H-15.
1. Turn power on (switch located in upper left corner in back of the unit).
2. Remove card-deck weight from input hopper.
It is operated as follows:
3. Place deck in hopper, with cards evenly aligned, face down, notched
corner to your left.
4. Replace card-deck weight on top of deck.
4. Press RESET button.
H.9 Multipunch Cards
Figure H-15
Model CR11-B Card Reader
EOF (end of file)*
blank suppress*
326 mode*
#29 mode*
12-11-2-1-6-7-8-9
12-11-1-2-8-9
12-2-4-8
12-9-2-4-6-8
in column one.
Character or Function 229 code 826 code
[ (left bracket) 1.2-8-2 11-8-5
1 (right bracket) 11-8-2 12-8-5
12-11-9-1-6-7-8-9
12-11-1-2-8-9
12-2-4-8
12-9-2-4-6-8
*multipunch must appear
H-26
H.1¢ LPil LINE PRINTER
H.12.1 Control Panel
The LP11 Control Panel is located at the top of the cabinet, to the left of the
window. This panel contains the controls for normal operation of the printer.
To operate in batch mode, the line printer controls and indicator lights must be
set as follows:
1. POWER indicator on;
2. READY indicator on;
3. ONLINE/OFFLINE switch in UP (ONLINE) position; and,
4. ONLINE indicator lit. (If the printer is not on line, the system hangs
until the ONLINE/OFFLINE switch is put to ONLINE.)
H.19.2 Maintenance Panel
”
The maintenance panel contains controls used for the line printer's initial set-up
and maintenance. It is accessible only by opening the front cabinet door, located
4
beneath the control panel.
This panel contains three switches and three indicators:
1. Main ac power switch;
2. PRINT INHIBIT switch - must be Off. (down) to enable printing;
3. DRUM GATE indicator - if lit, drum gate not properly locked;
4. PAPER FAULT - if lit, check for no paper or torn paper;
5. PRINT INHIBIT indicator - if lit, turn PRINT INHIBIT switch off,
6. MASTER CLEAR switch - spring-loaded to off (down) ; if toggled to on (up),
‘resets printer logic, turns off READY and ONLINE indicators.
H.10.3 Adjustment Controls
Controls are provided as listed in Table H-7.
H-27
Table H-7
Adjustment Controls
Control
Location
Function
Drum gate latch
Tractor paper width
adjustment
Tractor horizontal
tension adjustment.
COPIES ‘CONTROL lever
Paper vertical
adjustment control.
Top-of-form
indicators
Gearshift type knob
near right-hand side
of maintenance panel.
Setscrew at far
right of tractor
pressure plate
behind drum gate.
Next to left side
of tractor paper
width adjustment.
Extreme upper right-
hand corner of
cabinet just above
drum gate hinge.
Knob at upper left
of cabinet, directly
above right-hand side
of maintenance panel.
Red arrows visible
when drum gate is
swung open; one on
each side of paper
- directly below
tractor pressure
plates.
Unlocks drum gate
which can then be
swung open for
access to components
on back.
Adjusts right
tractor for various
paper widths; left
tractor is factory
adjusted. о
Adjusts horizontal
tension of paper.
Adjusts the distance
between hammer bank
and character drum
for different
numbers of printer
copies. Settings
are: 1-2, 3-4 and
5-6.
Adjusts vertical
alignment of
printing so that it
prints on lined paper.
Can be adjusted to
plus or minus one
line and may be ad-
justed while the
printer is in opera-
tion.
Aligns paper during
loading.
H-28
H.18.4 Loading Paper
‘Follow the steps listed below to load paper into the printer.
- step
Procedure
1.
10.
11.
Open front door of cabinet to gain access to maintenance panel and turn
main AC power switch on. Verify that control panel POWER indicator
lights. :
Lift control panel TOP OF FORM switch and release to move tractors to
correct loading position.
Open the drum gate by moving the drum gate latch knob to the left and
up. Swing drum gate open.
Adjust right-hand tractor paper width with adjustment for proper paper
width. This is accomplished by loosening the set screw on the 8ÿ-column
model or by using the easy release mechanism on the 12ÿ-column model.
Make certain that the right-hand tractor is tightened in place after it
is adjusted.
Open spring-loaded pressure plates on both tractors.
Load paper so that a perforation is pointed to by the two red arrows
(top-of-form indicators). Paper should lie smoothly between tractors
without wrinkling or tearing the feed holes. |
Close spring-loaded pressure plates on both tractors.
Adjust the COPIES CONTROL lever to the proper number for the number of
copies to be made. For example, set to 1-2 for single forms, set to
5-6 for 6-part forms.
Close drum gate and lock into position with drum gate latch. After
approximately 19 seconds the control panel ready indicator should light.
If it does not, check to see if any error is indicated. An error is
indicated if one of the following lights is on: DRUM GATE, PAPER FAULT,
or PRINT INHIBIT.
Lift TOP OF FORM switch several times to ensure paper is feeding properly.
Set system to on-line mode by lifting ONLINE/CFFLINE switch and verify-
ing that ON LINE indicator lights. At this point, printed matter can
be aligned with the paper lines by rotating the paper vertical adjust-
ment knob.
H-29
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