Singer 1501 Specifications

OPERATOR INSTRUCTIONS
SINGER MODEL 1501
INTELLIGENT TERMINAL
SINGER
BUSINESS MACHINES

OPERATOR INSTRUCTIONS
SINGER MODEL 1501
INTELLIGENT TERMINAL
22-6504-01
AUGUST 1975
SINGE;R
BUSINESS MACHINES
. PRIN~£D IN ;U.S.A.

REVISION RECORD
Edition
Letter Suffix Description
None
00 Original Printing -
August
1975
"
" " ,
"
, .
Operator Instructions 8/75

SECTION
1
2
3
4
INTRODUCTION . . . .
GENERAL DESCRIPTION
OPERATOR CONTROL pANELS
OPERATING PROCEDURES .. ...•
3-1. Scope of this Section
3-2.
3-3.
Inspection of the Terminal
Application of Power ...
3-4. Loading a Tape Cartridge .
3-5.
Normal Operation •...
3-6. Unloading a Tape Cartridge
3-7.
3-8.
Removal of Power
Error or Check Conditions
3-9.
Tape Errors
OPERATOR MAINTENANCE • . • . •
4-1. General Information
4-2.
Tape Drjve Cleaning
4-3.
4-4.
Leader Replacement
Freeing a Jammed Loader
i
CONTENTS
PAGE
iv
1-1
2-1
3-1
3-1
3-1
3-1
3-1
3-3
3~3
3-4
3-4
3-6
4-1
4-1
4-1
4-5
4-9

CONTENTS
ILLUSTRATIONS
FIGURE
PAGE
1-1 Singer Model 1501 Intelligent Terminal. • • . • • . • • • .. 1-1
2-1
Location of the Power On/Uff Switch
· · · · · · · ·
2-2
2-2
Location of the Switch Well
· · · .
2-2
2-3
Keyboard Layout
. . . . · . · · · ·
2-2
2-4 Controls
on the Tape
Drive. · · · ·
2-3
2-5
Tape Cartridge • . . . . · . . . · · ·
2-4
2-6
Tape Cartridge with Cartridge Cap
2-4
4-1
Releasing the Loader Retainer Lock
4-2
4-2
Seri es 1500 Tape Dri ve • · · · · · · · · · 4-3
4-3
Removing the Leader Eyelet • . · · ·
~-~
4-4 Cleaning the
Capstan After Leader Removal
· · · · 4-4
4-5
Removing the Leader Clip From the Clip Channel . · · · · · · · 4-5
4-6
Inserting the Leader Eyelet in the Clip Channel
· · · · · 4-6
4-7 Connecting the
Leader Eyelet to the Post on the Clip.
4-7
4-8
Moving the Clip into the Channel
4-7
4-9
Leader Shown in Tape Path 4-8
4-10
Fre~ing a Jammed Loader
· . . · · · · ·· · 4-9
ii

TABLE
3-1
CONTENTS
TABLES
Error or Check Conditions ••••••••••••.•.••.
iii
PAGE
3-5

INTRODUCTION
This manual provides the operating instructions for the Model 1501
Intelligent Terminal. It includes the following information:
SECTION 1 GENERAL DESCRIPTION, which provides a brief description
of
how the equipment functions from the viewpoint of an operator
and identifies all major parts of the equipment.
SECTION 2 OPERATOR CONTROL PANELS. This section shows the location
and appearance of all operator controls. It also briefly describes
what each control does when it is operated.
SECTION 3 OPERATING PROCEDURES. Included in this section are the
step-by-step procedures required to operate the
machine. This
section does not include instructions that are provided with the
operating
programs. It does, however, include a list of error
conditions and the checks to be made to correct them.
SECTION 4 OPERATOR MAINTENANCE. Routine maintenance functions to
be performed by the operator and the procedures to perform them are
provided in
this section.
iv

SECTION 1
GENERAL DESCRIPTION
The Singer Model 1501 Intelligent Terminal shown in figure 1-1 is a com-
pact desk-top unit that provides all the functions of a mini-computer. It
houses a keyboard slmi1ar to that of a typewriter, a display screen for
efficient fi11-in-the-b1ank type of data entry, two tape drives that
can serve as either input or output units, and a memory that stores the
program that controls operation of the 1501. Various, wide-ranging
functions can be obtained by simply loading different pre-recorded
program tapes and following the instructions given by the program.
Operator controls other than the keyboard include power-on, system reset,
program load, and program interrupt switches. Notification of data entry
errors is both visual on the display screen and audible through a speaker
in the keyboard section.
Figure 1-1. Singer Model 1501 Intelligent Terminal
1-1

SECTION 2
OPERATOR CONTROL PANELS
The Model 1501 Intelligent Terminal has relatively few operator controls
aside from the keyboard. The function of these controls is described in
the table
below, and their location is as follows:
a.
The power on/off switch is located on the right side panel, as shown
in figure 2-1.
b. A well beneath the display screen houses the PROGRAM LOAD/PROGRAM
INTERRUPT and the SYSTEM RESET switches, which are shown in
figure 2-2.
c. The keyboard, which is similar in layout to that of a typewriter
supplemented by the addition of some special purpose keys, is shown
in figure 2-3.
d. On each tape drive, there is a manual rewind switch located between
the supply and take-up reels. There is also a cartridge lock lever,
which ;s used to lock the tape cartridge in place. The location of
these controls
is shown in figure 2-4.
Control
Keyboard
PROGRAM LOAD Switch
PROGRAM INTERRUPT Switch
and SYSTEM RESET Switch
Rewind Button
Power on/off
Function
Data entry and various functions deter-
mined by program
Enables operator to load a program from
the tape in drive 2 (Switch forward for
program load)
Used when called for by specific
programs
Rewinds tape into cartridge
Controls
AC power to the 1501 (Switch·
up for power on)
2-1

OPERATOR CONTROL PANELS
Figure 2-1. Location of the Power
On/Off Switch
Figure 2-2. Location of the
Switch Well
Figure 2-3. Keyboard Layout
2-2

OPERATOR CONTROL PANELS
CARTRIDGE REWIND
LOCK'LEVER BUTTON
Figure 2-4. Controls on the Tape Drive
Operation of the Model 1501 Intelligent Terminal requires handling of the
tape
cartridges. This snap-in cartridge, which is shown in figure 2-5,
contains
100 feet of computer grade tape on a floating inner reel, and is
a storage device used with all Series 1500 Intelligent Terminals. A
clear outer case fully encloses the inner tape reel.
located on the outer case is a two-position hole for the write pin. If
the write pin is inserted into the position on top of the cartridge, the
tape cannot be written on. If the write pin is inserted into the position
on the bottom of the cartridge, the tape may be written on; this is called
the IIwrite-enable
li
position.
It is important that the tape be fully rewound within the cartridge before
the tape
is loaded or the cartridge removed from the tape drive. The tape
leader eyelet
must be in the position shown in figure 2-5 before the tape
is loaded.
Cartridge caps are supplied with each cartridge to prevent the eyelet from
vibrating out of position during shipping. To remove the cap, simply pry
it off with fingertips. To install a cap, push cap into place on the
bottom side of the tape cartridge. Turn the cap in direction of arrow to
rewind loose tapes. (See figure 2-6.)
2-3

OPERATOR CONTROL PANELS
Figure 2-5. Tape Cartridge
Figure 2-6. Tape Cartridge with Cartridge Cap
2-4

3-1. SCOPE OF THIS SECTION.
SECTION 3
OPERATING PROCEDURES
This section contains the procedures for operating the Model 1501
Intelligent Terminal up to the point at which the program provides
further operating instructions. Steps to
be taken and checks to be made
by an operator when errors or malfunctions occur are also included in
this section. Do not attempt to perform any step that is not clear to
you; ask your supervisor, sales engineer, or field service representative
to explain the procedure to you.
3-2.
INSPECTION OF THE TERMINAL.
Inspect the terminal before using, as follows:
a.
Make sure that I/O cabling is connected and terminator (if any) is in
place correctly.
b. Check to see if the power cord is properly plugged in and any other
cables
and plugs are properly connected.
c.
Make sure that the cooling airways are not blocked.
3-3.
APPLICATION OF POWER.
a. Turn the power on/off switch to the on (up) position. The switch is
located on the right side of the unit near the back.
b. Listen for indication that the fan is operating properly.
3-4.
LOADING A TAPE CARTRIDGE.
Always load the first program tape cartridge on tape drive 2. To load a
tape, observe the following instructions
and photographs:
a. After
opening the access
cover,
move the locking
lever to the unlock
position.
3-1

OPERATING PROCEDURES
b. Lift the loader. Thi sis
called the cartridge inser-
tion position.
c.
Insert the tape cartridge
into tape drive 2. Check
that the position of write
pin
is correct.
d.
Push down on the loader
with the tape cartridge
inserted.
e.
Move the locking lever to
the lock position,
and
close the access cover.
3-2

OPERATING PROCEDURES
f. Locate the well beneath the visual display, and lift the well access
cover.
g. Move the PROGRAM LOAD switch forward to load the program from the
tape,
and close the access cover.
3-5.
NORMAL OPERATION.
After the program has been loaded as a result of step (g) above, instruc-
. tions appear on the display screen. Follow these instructions until the
task
is completed; then unload the tapes and turn off the machine as
described in the following paragraphs.
3-6.
UNLOADING A TAPE CARTRIDGE.
Unload a tape cartridge as follows:
a.
Open the access cover and,
if tape is not already
rewound into the tape
cartridge~ push the rewind
button.
b. Move th~ locking lever to
the
unlock position.
c.
Lift the loader
3-3

OPERATING PROCEDURES
d. Remove the tape cartridge.
e.
Push down the loader with
tape cartridge
removed.
f. Keep the locking lever in
the
unlock position to keep
leader in place, and close
the access cover.
3-7.
REMOVAL OF POWER.
a. Turn the power on/off switch to the off (down) position. The switch
is located on the right side panel near the back.
b. Refer to Section 4 of this manual and perform all necessary operator
maintenance procedures.
3-8.
ERROR OR CHECK CONDITIONS
There are several steps that an operator can take to correct minor prob-
lems that occur during normal operation of the Model 1501 Intelligent
Terminal. Table 3-1 lists some of these problems and the action that can
be taken.
3-4

Symptom
Cooling fan not
rotating
and no
lights on tape
dri
ves
Line fuse blows
continually
Program does not
load
Burning odor
Failure during
program
Display is blank
Read and/or write
errors
Leader has trouble
returning to
"home" position
Tape runaway
OPERATING PROCEDURES
Table 3-1. Error or Check Conditions
Possible Cause
1. AC line fuse blown
2. AC line cord loose
3.
AC power on/off
switch not
on
1. Wrong size fuse
2. Internal defect
1. Tape cartridge
installed
improperly
2. PROGRAM LOAD switch
defective
Burned Component
Undetermined
Program did not
load
1• Dirty read
head
2. Dirty write
head
1• Dirty capstan
2. Faulty leader
1• Broken leader
2.
Broken
tape
3-5
Action to be Taken
Replace fuse.
Check line cord.
Turn switch on.
Check fuse rating
Call service representative.
Check Tape Loading
procedure.
Retry
PROGRAM LOAD switch
Turn power off and call
service representative
Retry
program
Retry program load
Follow directions
under read/write errors.
Clean capstan.
Replace leader.
Follow directions under
tape runaway

OPERATING PROCEDURES
3-9. TAPE ERRORS.
Tape errors may occur if preventive maintenance is inadequate. If a tape
error occurs, the tape read or write operation may have to be aborted,
depending
on the type of error. The two major error classes are the
following:
Tape Runaway.
If both tape reels ever spin uncontrollably at high speeds, turn power
off immediately. There are two possible causes. In all cases it is
recommended that the entire program be reattempted.
a.
If the leader breaks, a tape runaway occurs. Replace the leader,
using the procedure in Section 4 of
this manual.
b. If the tape breaks, a tape runaway occurs. Replace the tape cartridge,
and refer to the procedure for freeing a jammed loader in Section 4 of
this manual.
Read/Write Errors.
This type of
error is accompanied by an error tone. If read error occurs
while loading a
program tape, depress the red rewind button in the middle
of the tape drive. The program tape, or the copy of the program tape, may
be reloaded after the cause of the error is determined and corrected.
For read/write errors with data tapes, the current program should be
completed and later reattempted. The cause of the read/write error must
be determined. Depressing the ERROR key will quiet the error tone.
Possible causes of read/write errors include the following:
a.
On a tape write operation, the write pin was not in the bottom
cartridge position.
b. Dirt on the read/write heads, caused by inadequate preventive
maintenance.
c. Wrinkled tape.
d.
The leader threading was not aligned in the proper grooves of the
tape guides.
3-6

OPERATING PROCEDURES
The corrective action to be taken for read/write errors is as follows:
a.
If unable to write on a tape, check the position of the write pin.
It must be in the bottom position on the cartridge. Retry this
operation.
b. Check the leader threading path and inspect the leader. Replace the
leader
if necessary by following the leader replacement procedure in
Section 4 of
this manual.
c. Follow the tape drive cleaning procedure in Section 4 of this manual
if solutions (a) and (b) above do not apply.
3-7

4-1. GENERAL INFORMATION.
SECTION 4
OPERATOR MAINTENANCE
The Model 1501 Intelligent Terminal should be given the care worthy of
any high-quality piece of electronic equipment. Dust the cabinet,
keyboard,
and display screen regularly with a clean, soft cloth.
Foreign material
such as coffee or candy should be removed with a cloth
dampened with a mild detergent or Freon. Keep the keyboard free of
metallic objects
such as paper clips and hairpins, since these items
can easily cause jamming of the keys or electrical shorts if they drop
through into the electronic circuits.
Other than the overall cleaning outlined above, the only preventive
maintenance required of the user
is to clean all tape drives at least
once each week, using the procedure in this section. Inspect the tape
leader
each time the tape drive is cleaned, and replace it as necessary.
The inspection and replacement procedures are included in this section.
4-2.
TAPE DRIVE CLEANING.
Perform the following steps to clean each tape drive:
a.
The first step is to move the loader to the upright position, as
follows:
(1)
Move the locking lever to the unlock position and lift the
loader to the
cartridge insertion position. If the loader
cannot
be raised, perform the steps in paragraph 4-4 before
performing the following step.
(2) Firmly pull the loader
retainer lock with a forefinger, as
shown in figure 4-1, and lift the loader.
(3) Now that the loader is in the upright positio'n, take time to
become familiar with the various components on the tape drive,
as
shown in figure 4-2. Note the threading path of the leader.
b. Lift the leader eyelet upward off the pin on the take-up reel, as
indicated in figure 4-3. The leader clip will remain in the clip
channel because the locking lever is in the unlock position.
c.
Remove the leader from its path. If the leader has worn spots or is
twisted, replace it as described in the leader replacement procedure
in
this section.
4-1