Checking The Power Supply - Toshiba V Series User Manual

Chapter 6 Troubleshooting

6.2 Checking the power supply

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164
If the "POWER" LED on the front of the power supply module does not light with power
up, or goes off after a certain period of time, check the following:
Is supply voltage within
specifications?
YES
Is fuse normal?
YES
Does POWER LED light
when all modules other than
the power supply module are
removed?
YES
Does POWER LED light
when expansion base and
expansion interface are
connected?
(With CPU and all I/Os
removed)
YES
Is current consumption of
internal 5V, 3.3V and 24V
within allowable range?
YES
Identify the cause of
POWER LED error by
mounting module one by
one.
Supplementary
1. Turn off power before mounting and removing cables and modules.
2. If the fuse is blown, find out and get rid of the cause. If the fuse is replaced without eliminating
the cause, damages to modules may get serious. If the cause of blown fuse cannot be
determined, consult Toshiba without replacing the fuse.
3. Blown fuse may be caused by failed internal circuits of the power supply module.
PS691:AC85-132/170-264V
PS693/694:AC85-264V
PS632:DC20.4-28.8V
PS652:DC85-132V
Remove the cause of blown fuse and
NO
replace the module.
Note) See the note below.
NO
The power supply module or base unit is
defective.
NO
Check expansion cable connection and
expansion interface.
Make total current consumption of
NO modules and units in the system within
allowable range. See Section 1.6 Power
Supply Module.
The module mounted immediately before
the LED error occurs is defective.
model 2000 Sequence Controller S2 User's Manual -Basic Hardware-