TEST SETUP & TESTING 6 - 15
Service Flow Chart (Board Level)
Figure 6-2   Servicing the MTM800 ENH
No
Ye s
No
Ye s
If the radio does not have a control head 
attached you need to connect a control 
head to operate the radio. For a motorcycle 
radio use a motorcycle control head. In all 
other cases use a standard control head
Switch on the radio and observe the display 
at power up. The radio must completely 
power up. 
NOTE:
Before replacing any kits, check the 
flexes to the control head or expansion 
head.
If the main board has been replaced:
Send the new TEI number to service 
provider. Clone/reprogram customer 
details to new radio.
If fuse F0301 or F0302 or F0303 needs
to be replaced use Motorola part No.
6580542Z01
(see figure on following pages).
A list of replacement kits can be found 
in the Appendix B (Replmt. Parts & Kits).
For a list of replacement parts refer to 
Chapter 7 (Maintenance). 
 
Start
Power up
OK ?
All tests
successful
?
Replacement
kits available
?
Read the codeplug with the CPS. Connect 
the radio to the IFR. Perform all RF, call & 
manual tests of chapter TESTING.
Replace main board and start 
complete procedure again.
If no kits have been replaced, 
verify installation integrity:
   Check DC cable and connector
   Check RF antenna , cable & connector
   Check connected accessories 
If the main board has been replaced:
   Send the new TEI number to service 
   provider. Clone/reprogram customer 
   details to new radio.
Replace the costumer's radio
Send the faulty radio to Level 3 maintenance
Clone/reprogram customer details to new radio
Send the TEI number of the new radio to the
service provider.
Incorrect behavior of 
LEDs, display or buttons.
Replacement 
kits available
?
Replace the control head 
or the expansion head.
Switch on the radio again.
Power up
OK ?
Check fuses F0301, F0302 
and F0303 on the main board
before you replace main board 
and restart complete procedure.
Done
No
No
Ye s
Ye s
Ye s
Use the buttons and volume control  and 
check for correct display result.
6866539D31.book  Page 15  Tuesday, March 20, 2007  6:32 PM