
5.2 Error Indication
When the 
5.3 Replacing Fuses
To protect the unit from overcurrent and equipment fault, two 20 A fuses for the transceiver unit (and two 30 A fuses for the 
Power Cable Fuse: 20 A (for both 150 W/250 W) and 30 A (for 
Power supply unit (for 150 W sets)
Remove the fuse cover using a screwdriver (+), then replace: Fuse 10 A for 
20 A for 24 VDC
| RED LIGHT | GREEN LIGHT | 
 | |
| FUSE | 
 | 
 | 
 | 
| 
 | 
 | 
 | |
| 100V 10A | 125V 20A | 
 | 
 | 
| 220V 5A | 
 | 
 | |
| 
 | 
 | 
 | |
| ON | ON | 
 | 
 | 
| OFF | OFF | 
 | 
 | 
| AC IN | DC IN | 
 | DC OUT | 
| L N G | + - | + | - 24V + - | 
| AC POWER Switch | DC POWER Switch | 
FRONT PANEL OF PR-300 
The Power Supply Unit 
| BREAKER | POWER LAMP | 
POWER
ON
ON
OFF
| AC INPUT 50/60Hz | DC OUTPUT | 
TERMINAL COVER
FRONT PANEL OF