Service manual

Si-64 Troubleshooting
Troubleshooting 25
1. Troubleshooting
1.1 Equipment does not Operate.
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Equipment cannot be operated by remote controller or switch on main unit.
Supposed Causes
„
Faulty door switch (safety switch assembly)
„
Blown fuse
„
Faulty transformer
„
Faulty printed circuit board (control PCB assembly, display PCB assembly)
Troubleshooting
Check connector
connection of A1P
control PCB assembly.
Check door switch
(safety switch assembly).
YES
YES
Defective door switch
(safety switch assembly)
Correct connector connection.
Replace fuse.
Replace transformer.
Does
equipment fail
to operate when
short-circuited?
NO
(EF001)
Is connection
normal?
NO
Check transformer
secondary voltage (X3A).
To next page
Check fuse for A1P
control PCB assembly.
YES
YES
Is there
continuity in fuse?
NO
Is voltage
higher than 12.5
VDC and lower than
23 VDC?
NO