Testomat EVO TH CAL - Page 74

Servicing and maintenance
74
Step
LED / lamps
Action
3
Primary fuse F1 od F6 on the
motherboard defective.
Disconnect device from the mains!
Remove cable compartment cover (Phillips-tip screwdriv-
er).
Use a flat-tip screwdriver to turn and rotate the safety cov-
er.
Replace safety fuse 4A
Put safety cover back in place.
When switching on the Testomat device, check whether all
three green LEDs light up. Otherwise, restart from Step 1.
4
Fuses on the power supply
board defective.
Disconnect device from the mains!
Remove both fixing screws of the upper and lower power
supply board on the motherboard.
Remove the power supply board.
Change the plug-in fuses F2, F3, F4 and F5.
Re-insert the power supply board.
Assemble both fixing screws
When switching on the Testomat device, check whether all
three green LEDs light up. Otherwise, restart from Step 1.
5
3.3V + 12 V do not light up
Disconnect device from the mains!
Remove both fixing screws of the upper and lower power
supply board on the motherboard.
Remove the power supply board.
Change the plug-in fuses F5 (T1,6A) and F3 (T0,16A).
Re-insert the power supply board.
Assemble both fixing screws
When switching on the Testomat device, check whether all
three green LEDs light up. Otherwise, restart from Step 1.
6
24V does not light up
Disconnect device from the mains!
The fuse F4 is located at the top edge of the power supply
board. Change the plug-in fuse F4 (T2A).
When switching on the Testomat device, check whether all
three green LEDs now light up. Otherwise, F2 (T0,315A)
must also be changed:
Remove both fixing screws of the upper and lower power
supply board on the motherboard.
Remove the power supply board.
Change the plug-in fuse F2 (T0,315A).
Re-insert the power supply board.
Assemble both fixing screws
When switching on the Testomat device, check whether all
three green LEDs light up. Otherwise, restart from Step 1.