Teletype 43K001/AAA, Repair Manual

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MANUAL NO.
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568
THE 43 KEYBOARD
REP AIR MANUAL
INTRODUCTION
REPAIR MANUAL 525
Issue 2, November 1983
This manual provides complete repair information for the 43 keyboards used
in 42/43 Basic Terminals. The manual is intended for field or shop use and is
arranged into various parts that include Troubleshooting, Disassembly /Reas­
sembly and Parts. The 50K122 unitized keyboard, however, is not a field
repairable component. Disassembly in the field should not be attempted.
Service Manual 369 provides complete servicing information for
all
versions
of the Basic 43 8-Level Teleprinter and Service Manual 538 provides complete
servicing information for
all
versions of the Basic 42 (5-Level) Teleprinter.
All replaceable components are identified in this manual. Waveforms are
included on wiring diagrams and charts are provided for additional trouble
isolation using an oscilliscope or volt-ohmmeter. No specially designed tools
or shop facilities are required for repair operations. However, Standard 42 or
43 Teleprinter Terminals are required to test and troubleshoot the keyboard
when not installed on location.
Spare parts for repair are available from Teletype Corporation. Repair per­
sonnel should be properly trained and have access to these spares before
attempting repair of the 43 keyboards.
This manual is intended to be used with the following supplemental repair
documentation for the 42/43 and 45-30 CPS Printers.
DESCRIPTION
Circuit Diagrams for Components used in 42/43 and 45-30 CPS Character Printer
Terminals and Associated Units
Product Support Manual
42/43 Paper Tape Unit
TTL and SSI Logic Cards used in 42/43 and 45-30 CPS Character Printers
Power Supplies used in 42/43 and 45-30 CPS Character Printer Terminals
Keyboards used in 42/43 Basic Terminals
SSI Keyboards used in 42/43 Buffered Terminals
Parts- Enclosures, Paper Handling and Miscellaneous Accessories used with 42/43
and 45-30 CPS Character Printers
Interfaces, Controllers and Modification Kit Circuit Cards associated with 42/43 Ter­
minals (includes AB, SCU, and brief repair of non-pedestal controllers)
42/43 and 45-30 CPS Character Printer Mechanisms
·
Internal Modems used in 42 Basic Terminals