Ericsson LBI-38701, Maintenance Manual

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Personality Prom Check (FCN 1 7)
The FCN 1 7 test displays [PROMTEST] for one
second an then displays a 30 second display count of when
the test will complete. The test will conclude with [ PROM
OK] if the EEPROM is good. The test will end at any time
a bad location is found and display the following message
[PROM BAD]. This is a non-destructive test in that it does
not alter the contents of any of the locations in the
EEPROM.
Relay Switch (FCN 1 8)
The FCN 1 8 function displays [RELYTOGL] and is
used to toggle the relay (ext. alarm) line at a 1000 HZ rate
for board level testing.
Port Pin Check (FCN 1 9)
The FCN 1 9 function displays [PORTTOGL] and is
used to do a board level test operation of the microproces-
sor port pins. The port pins will toggle at the rates indicated
in Table 2.
Software Revision (FCN 2 0)
The FCN 2 0 test displays the microprocessor software
revision. [MDR GRxx] where xx is the revision number in
decimal format (i.e. 31 = 3.1)
Band Switch (Direct Mode) (FCN 2 1)
The FCN 2 1 test displays [ BSWCH-0] then pulls the
bandswitch line of the VCO low. A talk around channel
(3610-4808) must then be loaded using the channel load
function (CLR). RCL must be pressed to reset the Band-
switch Line. Normal channels must then be loaded before
the synthesizer will lock on channel.
Checksum Test (FCN 2 2)
The FCN 2 2 test performs a checksum test on the
program memory. [PROM BAD] is displayed if the check
sum fails. [ PROM OK] is displayed if the test is successful.
TCXO Low Frequency Modulation
Test (FCN 2 3)
The FCN 2 3 function checks the lock detect line of
the synthesizer and displays [ UNLOCK ] if the synthesizer
is out of lock. Otherwise the radio displays [DCG ENC],
keys the transmitter (even if an "unlock" condition exists)
and continuously transmits a 10 HZ square wave useful in
setting the low frequency compensation level to the TCXO
(R250). Mic audio is also present. Pressing any key unkeys
the transmitter.
Handset Self-Test (FCN 2 4)
The FCN 2 4 test sends a command to the handset to
cause it to go into the self-test mode. The handset will
display [SELFTEST] then [ RAM PASS] or [ RAM FAIL]
and then begin a pixel test of the multiplexed display. A
test of the backlight [LITE ON ] then [LITE OFF] will be
performed. The call timer will begin running i.e.[000 00 0].
At this time the handset will display the name of any key
(except END) that is pushed, eg. [ KEY 4 ] indicates key 4
is pushed, [ KEY STO ] indicates the STO key is pressed,
etc. Pushing the END key will terminate the self test. At
this time [FSxx #01] will be displayed and the handset will
return to test mode operation.
NOTE
Any key causes reset to default conditions.
U701 Pin RATE
2 20 Hz
3 10 kHz
4 5 Hz
5 2.5 kHz
6 1250 Hz
7 625 Hz
8 312 Hz
9 156 Hz
14 78 Hz
15 39 Hz
Table 2 - Port/Pin Identification
The radio must be equipped with the Talk-Around
option for proper direct mode function. Performing
direct mode tests on a radio that is not equipped with
the Talk-Around transmit option may damage the
radio.
CAUTION
LBI-38701
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