LBI-3890
19
CONTROL UNIT
SYMPTOM DIAGNOSTIC PROCEDURE
Radio dead at power-
on (display dark and
no lighted indicators)
a) Check battery connections and the Red Lead A+ fuse on the Power Cable.
b) Turn unit "OFF", then simultaneously press and hold "EMERGENCY" and
"OPTION" buttons, while turning the unit "ON". All indicator lights and all display
dots should light. Release the buttons and the display should show the following
message:
(C) - 1993
EGE
This indicates that the Control Unit is functioning correctly. If correct, check
programming and feature encryption, using the "EDACS3" PC programming utility.
c) If not correct, measure A+ voltage at the microphone connector, Pin 6 (reference
ground at Pin 7). If not present, check fuse F601 on the Logic board for A+ on each
side of part. Replace if open circuited.
d) If the fuse is OK, check the connection of Flex Circuit PC2 with J701 on the Logic
board. If still not present, reconnect, making sure side tabs are locked. Recheck
microphone connector Pin 6 for A+.
e) If A+ is present, Check programming and feature encryption, using "EDACS3" PC
programming utility. If symptom persists, substitute a known good Logic board and
reprogram.
f) If no A+ is at the microphone, Pin 7, check for A+ on the Logic board, J704, Pin 3.
If not there, check the J704/J1004 connection. If still not there, replace the PA
module. If there, replace the Logic board.
Display lights, then goes dead
a) Turn unit "OFF", then simultaneously press and hold the "EMERGENCY" and
"OPTION" buttons, while turning the unit "ON". All indicator lights and all display
dots should light. Release the buttons and the display should show the following
message:
(C) - 1993
EGE
This indicates that the Control Unit is functioning correctly. If OK, check
programming and feature encryption, using "EDACS3" PC programming utility.
b) If OK, check connection of Flex Circuit PC2 with J701 on the Logic board. If not
OK, reconnect , making sure side tabs are locked.
To Next Page
Loading...
