Toshiba 6F3B0253 - Manual (Page 285)

6F3B0253
Basic Hardware and Function
283
10. Troubleshooting
10.1.1 Power supply check
If the PWR (power) LED is not lit after power on, check the following points.
Check the power connection Connection terminals are correct.
The terminal screws are not loose.
The terminal block is installed securely.
Correct
Check the power voltage 85 to 132/170 to 264Vac (50/60 Hz)
at the T1-16S’s terminal or 20.4 to 28.8Vdc (DC power)
Normal
Remove the programmer If the PWR LED becomes normal, the
port connector internal 5Vdc can be shorted in the
external connections of this port.
Still unlit
Remove the 24Vdc service If the PWR LED becomes normal, the
power terminals if it is used 24Vdc service power can be over load.
Still unlit
Remove the I/O modules. If the PWR LED is still unlit, the T1-16S
basic unit may be faulty. Replace the unit.
Lit
Confirm the internal 5Vdc The 5Vdc capacity for I/O modules is
current consumption if max. 1.5A.
I/O module is used. (Refer to section 2.1.)
Within the limit
Insert the removed option Replace the faulty I/O module.
modules one by one to
pinpoint the faulty card.