Teletype DATASPEED Checkout And Troubleshooting

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BELL SYSTEM PRACTICES
Plant Series
SECTION 578-500-300
Issue 3, August 1970
AT&TCo Standard
"DATASJ,>EED®" PRINTER
RECEIV:l;:-ONLY STATION
CHECKOUT AND TROUBLESHOOTING
CONTENTS
PAGE
1. GENERAL
. . . .....
1
2.
OPERATIONAL CHECKS 1
LOCAL CHECKS .
......
1
ON-LINE CHECKS
........
2
3. TOOLS AND TEST EQUIPMENT 6
4. TROUBLESHOOTING PROCEDURE 9
1. GENERAL
1.01 This section provides operational checks and
troubleshooting procedures for the DATASPEED
Printer (Receive-Only). It is being reissued to add a checkout
procedure, incorporate current troubleshooting information,
and to accommodate the latest engineering changes in the
electronic circuitry and mechanical components. Since this is
a general revision, marginal arrows ordinarily used to indicate
additions and changes are omitted. This section was formerly
designated 592-820-300, but this number is now cancelled.
Since this issue of Section 578-500-300 is a revision of
Section 592-820-300, Issue 2, it is designated Issue 3.
2. OPERATIONAL CHECKS
2.01 The following operational checks should be per-
formed after a station is completely assembled and
properly programmed.
All
checks should be performed upon
initial installation or whenever a system trouble condition or
routine maintenance requires an operational checkout. Refer
to Part 4 of this section for analysis and .correction of any
trouble which appears during checkout.
LOCAL CHECKS
2.02 Remove the cover assembly from the base and
front panel assembly at the top of the printer
cabinet, and insert the TP330131 jumper in the cover
interlock socket at the front left of the cover base.
2.03 Load the transport with a roll of standard KS1920
teletypewriter paper. Do not use KS8621 paper or
any other paper which is not identical in characteristics to
KS1920.
2.04 With the power cord plugged into the ac line, open
the front door of the cabinet and place the
ON/OFF switch in the ON position. The ventilating fans
should turn on. Close the front door. The READY lamp
should light approximately 15-45 seconds after the door is
closed.
2.05 Depress the PAPER ADVANCE pushbutton. The
PAPER ADVANCE and PRINTER ON lamps
should light, and the printer should feed paper.
Note: Observe proper braking action of the paper
puller and paper winder motors during paper advance.
2.06 Place the paper release lever at the top right of .the
transport in the OPEN position and make a pencil
mark on the line feed disc (top left of transport). Hold the
line feed drive belt to keep it from moving and press _the
·PAPER ADVANCE button for a few seconds. The red paper
jam lamp (top left rear of paper transport) should light after
the line feed disc has rotated from 1-1/2 to 1-3/4 turns, and
the line feed disc should stop rotating at the same time.
Depress the lens cap of the paper jam lamp to extinguish the
lamp and reset the circuit. dose the paper release lever.
2.07 If the requirement in 2.06 is not met, remove the
. knurled cover and adjust the potentiometer on the
right side of the transport frame (clockwise decreases
rotation, counterclockwise increases rotation). Press the
PAPER ADVANCE button several times before rechecking
this requirement.
2.08 Lift the paper roll on the paper unwinder assembly
to verify that the PAPER ALARM lamp lights
when the paper supply is low.
2.09 Open the front door of the cabinet and turn off
the ac ON/OFF switch. Remove the paper from
the transport, and remove the jumper from the interlock
Prepared for American Telephone and Telegraph Company by Teletype Corporation
©
1969 and 1970 by Teletype Corporation
All rights reserved
Printed in U.S.A.
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