Multitone RPR 551IS - Page 80

IS BEEP
CORRECT?
FIT NEW BATTERY.
SWITCH ON
SUSPECT PAGER
IS DISPLAY
CORRECT?
NO
YES
IS DISPLAY
BLANK OR
FLASHING?
FLASHING
BLANK
CORRUPTED
EEPROM.
RE-PROGRAMME
IS LED
CORRECT?
NO
YES
IS BEEP
CORRECT?
NO
YES
NO
YES
IS BEEP
CORRECT?
IS BEEP
CORRECT?
NO
YES
NO
YES
IS LED
CORRECT?
NO
YES
DECASE AND
CHECK:
DISPLAY
MODULE, V
DD
2,
V
DD
, TR17, D3,
IC3
DECASE AND
CHECK:
DISPLAY
MODULE, V
DD
2,
TR20, TR24, IC2,
IC3, L3
DECASE AND
CHECK:
1V5, V
DD
2,
GATE ARRAY,
µP, EEPROM.
FOLLOW
TABLE 5
DECASE AND
CHECK:
DISPLAY
MODULE, V
DD
2,
INTER-
CONNECTIONS,
IC3
DECASE AND
CHECK:
D3, TR17, IC3
PLACE IN
P637 AND
SEND CALL
DECASE AND
CHECK:
IC2
DECASE AND
CHECK:
L3, TR20,
TR24, IC2
B
RPR 550IS Series
TM1188 Issue 1Page 5 - 10
Figure 4: Fault-Finding Guide