Alstom MBCH12 - Page 28

28
Flowchart 5
Link terminals
16 and 27.
Inject In into
terminals 15 and 28
Link terminals
2 and 27.
Inject In into terminals
19 and 28.
Monitor R1
Inject In into
terminals 19 and
28
Link terminals
18 and 27.
Inject In into terminals
17 and 28
Conclusion:
Faulty pcb1
Monitor R1
inject In into
terminals 17
and 28
Conclusion:
Faulty pcb1
Monitor R1
inject In into
terminals 1
and 28
Conclusion:
Faulty pcb1, pcb2
or transformer T7
Conclusion:
Relay appears to
be functioning
correctly
Conclusion:
Faulty pcb1,
pcb2 or
transformer T6
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
Conclusion:
Faulty pcb1
YES
Conclusion:
Faulty pcb1,
pcb2 or
transformer T8
R1
voltage
correct ?
(note 6)
TP4
voltage
correct ?
(note 3)
R1
voltage
correct ?
(note 6)
TP4
voltage
correct ?
(note 3)
TP4
voltage
correct ?
(note 3)
R1
voltage
correct ?
(note 3)
YES
YES
YES
YES
YES