Teletype Dataspeed 4500 Series Testing And Troubleshooting

BELL SYSTEM PRACTICES
AT&TCo Standard
SECTION 582-311-500
Issue 1, April 1980
"DATASPEED*" 4500 KEYBOARDS
TESTING AND TROUBLESHOOTING
CONTENTS PAGE
1. GENERAL..................... 1
2. TESTING. . . . . . . . . . . . . . . . . . . . . . 1
3. TROUBLESHOOTING. . . . . . . . . . .. 10
1. GENERAL
1.01 This section provides testing and trouble-
shooting for the DATASPEED 4500 series
keyboard as in Fig. 1.
45K301GAA/03 Keyboard
Without Magnetic Stripe Reader
45K301GAA/02 Keyboard
With Magnetic Stripe Reader
Fig. 1-DATASPEED 4500 Keyboards
1.02 Whenever this section is reissued, the
reason for reissue will
be
listed in this
paragraph.
*Registered Trademark of AT&TCo.
Note:
When ordering replaceable parts, prefix
each part number with the letters "TP" (ie,
TP123456), unless otherwise specified.
1.03 The extent of the testing and trouble-
shooting procedures are limited to that
which is required for correction of troubles or
replacement of parts in field locations.
1.04 Refer to Section 582-311-100 for infor-
mation providing description and opera-
tion of DATASPEED 4500 series keyboards,
Section 582-311-400 for wiring, and Section
582-311-700 for adjustments, disassembly/reas-
sembly and parts information.
1.05 The reference manual associated with the
DATASPEED 4500 series keyboard is:
999-300-140 How to Operate Synchronous
DATASPEED 4540 Keyboard Display.
2. TESTING
2.01 Operational checkout procedures are pre-
sented in Tables A through D. Use all
applicable tables to assure complete operation
after maintenance or to isolate a poorly defined
trouble area.
2.02 Perform the checkout in the order pre-
sented. The required response for each
test step is .shown. If the unit under test fails
to respond correctly to a test step, go
to
3. TROUBLESHOOTING.
2.03 The keytop identification can be found
in Fig. 4.
Prepared for American Telephone and Telegraph Company by Teletype Corporation
©
1980 by Teletype Corporation
All rights reserved
Printed in U.S.A.
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