Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
TROUBLESHOOTING & REPAIR
TORCH CONTINUITY AND SOLENOID TEST (continued)
TABLE F.5 - TORCH ASSEMBLY RESISTANCES
TEST | CIRCUIT(S) BEING | EXPECTED |
| TEST |
|
POINTS | TESTED | RESISTANCE |
| CONDITIONS |
|
|
|
|
|
|
|
Pin 7 to Pin 8 | Parallel pilot arc | 1.5 ohms maximum |
| None |
|
| leads |
|
|
|
|
|
|
|
|
|
|
Pin 7 to Torch | One pilot arc lead to | 1.0 ohm maximum |
| Torch consumables |
|
Nozzle | nozzle |
|
| in place |
|
|
|
|
|
|
|
Pin 8 to Torch | One pilot arc lead to | 1.0 ohm maximum |
| Torch consumables |
|
Nozzle | nozzle |
|
| in place |
|
|
|
|
|
|
|
Pin 1 to Pin 9 | Torch trigger circuit | 100K ohms minimum |
| Torch trigger NOT |
|
|
|
|
| pulled (not activated) |
|
|
|
|
|
|
|
Pin 1 to Pin 9 | Torch trigger circuit | 1.0 ohm maximum |
| Torch trigger pulled |
|
|
|
|
| (activated) |
|
|
|
|
|
|
|
Pin 2 to Pin 3 | Electrode Solenoid | 45 to 55 ohms |
| None |
|
|
|
|
|
|
|
Pin 7 to Torch | Pilot and Electrode | 1.0 ohm maximum |
| Torch consumables |
|
Electrode at machine | circuit |
|
| in place |
|
end of torch |
|
|
|
|
|
|
|
|
|
|
|
Pin 8 to Torch | Pilot and Electrode | 1.0 ohm maximum |
| Torch consumables |
|
Electrode at machine | circuit |
|
| in place |
|
end of torch |
|
|
|
|
|
|
|
|
|
|
|
Pin 7 To | Electrical Isolation | Open |
| Torch |
|
Pin 1 | of Circuits | (very high) |
| Consumables |
|
Pin 2 |
|
|
| Removed |
|
Pin 3 |
|
|
|
|
|
Pin 9 |
|
|
|
|
|
|
|
|
|
|
|
Pin 8 To | Electrical Isolation | Open |
| Torch |
|
Pin 1 | of Circuits | (very high) |
| Consumables |
|
Pin 2 |
|
|
| Removed |
|
Pin 3 |
|
|
|
|
|
Pin 9 |
|
|
|
|
|
|
|
|
|
|
|
Pins 1 & 9 to | Electrical Isolation | Open |
| None |
|
all other pins | of Torch Trigger | (very high) |
|
|
|
| Circuit |
|
|
|
|
|
|
|
|
|
|
Pins 2 & 3 to | Electrical Isolation | Open |
| None |
|
all other pins | of Torch Solenoid | (very high) |
|
|
|
| Circuit |
|
|
|
|
|
|
|
|
| |
4. If any of the resistance checks are not cor- | 5. Carefully apply the 12 VDC supply to the | ||||
rect, the torch assembly may be faulty. | electrode solenoid. | (positive to Pin 2 and | |||
Repair or replace. |
| negative to Pin 3). | The electrode solenoid | ||
|
| should activate. Listen for the solenoid | |||
|
| action in the torch handle. If the solenoid | |||
|
| does not activate, it may be faulty. Replace. | |||
