Click here to make tpub.com your Home Page

Page Title: SECTION III. TROUBLESHOOTING
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 11-5920-252-24
SECTION III. TROUBLESHOOTING
Section Contents
Paragraph
General .......................................................................................
2-7
Tools and Test Equipment ..........................................................
2.8
Troubleshooting Procedure ........................................................
29
2.7
GENERAL
Troubleshooting at the organizational maintenance level is limited to resistance measurements.
The arrester is a passive device, therefore the absence of a signal to a shelter communications equipment could be the
fault of the arrester when it is certain that the signal is present at the input (channel) of the arrester.
Table 2-2 gives the typical channel numbers with the circuit over which signals pass through the arrester. For example,
the 4 lines used for channel 1 are P1 to J1 pins A to A, B to B, C to C and D to D.
2-8.
TOOLS AND TEST EQUIPMENTI
A Phillips screwdriver located in Tool Kit, Electronic Equipment TK-101/G is required for access to the arrester.
Multimeter TS-352B8U is required to make the necessary resistance measurements.
2-9.
TROUBLESHOOTING PROCEDURE
1.
Determine the faulty channel.
2.
Remove the access panel of the SIGNAL ENTRANCE panel. Determine from Table 2-2 which circuits may be at
fault and disconnect P and J connectors of the arrester.
3.
Perform continuity check as follows:
Set TS-352B/U FUNCTION switch to OHMS and set range switch to RX1.
Connect the TS-352BIU leads to the same lettered pins on the P and J connectors shown in Table 2-2.
All resistance measurements should be less than 20 ohms. If any measurement is more than 20 ohms,
higher level of maintenance is required.
2-4

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business