Power Unit (Ps089A); Checking Operation; The Protective Circuit - GRAPHTEC CUTTING PRO FC3100-60 Service Manual

5.2 Power Unit (PS089A)

5.2.1 Checking Operation

(1) Use a multi-mater to check the voltage levels of TP1 to TP5.
Test pin
TP1
TP2
TP3
TP4
TP5
TP10
(2) If voltage levels cannot be measured at TP1 to TP5, use the following method to check operation.
• Disconnect the main board's J101 connector.
• Ned, use the multi-meter to measure the voltage levels of the J101 connector pins.
Pin Number
1 pin
2 pin
3 pin
4 pin
5 pin
6 pin
7 pin
8 pin
9 pin
10 pin
(3) If the measured voltage levels do not conform to the above tables, the power unit is probably
defective.

5.2.2 The Protective Circuit

The protective circuit is activated in either of the following cases.
+ 32 V power
Protection against 8 A or more
excess current
Protection against 115% of the rated
excess current voltage (32V)
When the protective circuit is activated, all of the plotter's supply voltages are switched off.
If the protective circuit is activated, turn off the plotter. After the plotter is left as is for three to five
minutes, it will automatically recover.
Voltage
+ 5 V
+ 12 V
+ 32 V
- 12 V
+ 24 V
GND
Voltage
+ 5 V
+ 12 V
+ 32 V
GND
GND
+ 5 V
- 12 V
+ 32 V
+ 32 V
GND
+ 5 V power
6 A or more
5 - 2
FC3100-60 Service Manual
P/N53802-031T Rev. A
+ 12V power - 12V power
6 A or more 3 A or more