TM 11-7025-234-23
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Index of Maintenance Procedures
Paragraph No.
Title
Page No.
Access/Close Up V.29 Modem
Remove/Replace Power Supply Assembly
Check/Adjust Power Supply Voltage
Remove/Replace Fuse
Remove/Replace Rate/Mode Display Board
Remove/Replace Input/Output Board
Remove/Replace Mother Board
Remove/Replace Circuit Boards Al thru A8
Section 1. REPAIR PARTS, SPECIAL TOOLS,
TMDE AND SUPPORT EQUIPMENT
For authorized common tools and equipment, refer to the Modified Table of
Organization and Equipment (MTOE) applicable to your modem.
Refer to TM 11-701O-2O5-23P for a complete listing and description of special
tools, TMDE and support equipment required by direct support maintenance. Also
refer to appendix B for a list of tools pertaining to the modem.
Refer to TM 11-701O-2O5-23P for a complete listing and description of spares and
repair parts required for direct support maintenance of this equipment.
Section Il. TROUBLESHOOTING
Failure of this equipment is usually determined by a system level diagnostic
program. See your system manual for instructions. Upon determination of equipment
failure, the modem assembly is removed from the system for fault isolation.
The most effective way to find a fault in this equipment is to follow a routine
which guides you through the five phases of troubleshooting (fig. 4-l). By
following this routine you assure accurate use of fault isolation and fix
procedures. You will also improve your troubleshooting skills.
