Multitone FLA 872 Technical Manual page 51

'A'
'A'
'A'
TAG11127-1
TM1205 Issue 2
NO
BLANK
IS DISPLAY BLANK
OR CORRUPTED?
IS BEEP AUDIBLE
NO
AT SWITCH-ON?
DE-CASE AND CHECK
DISPLAY, V , IC1, IC3, IC4,
DD
AND POWER SUPPLIES.
Figure 5.5: Fault Finding Guide (Sheet 1 of 3)
PAGER
SUSPECT
FIT A NEW BATTERY
AND SWITCH ON.
IS THE 'SWITCH ON' MESSAGE
SEQUENCE?
CORRUPTED
CORRUPTED EEPROM.
RE-PROGRAM. RE-TEST.
YES
DE-CASE AND CHECK
DISPLAY MODULE, V
DD
AND
INTERCONNECTIONS.
NO
IS BEEP AUDIBLE
AT SWITCH-ON?
DE-CASE AND CHECK
SP401, TR416, TR415.
TLA 852/FLA 872
YES
YES
'B'
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