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TROUBLESHOOTING & REPAIR
DISPLAY BOARD CALIBRATION TEST (continued)
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TEST PROCEDURE
1.Start the engine.
2.Turn the range selector switch to the CC posi- tion, and control dial to the min. position.
3.With no load applied, slowly turn the control dial clockwise from min to max in each range selector switch position. The display should read the same as the Table F.5 shown below.
4.If the display reading is off in any mode, the display board must be
RE-CALIBRATION PROCEDURE
5.Turn the engine off.
6.Set the control panel switches as follows:
Welding Terminals switch to “Remotely Controlled”.
Local/Remote switch to “Remote”.
Range Selector switch to “60A”.
Control Dial to “Min”.
Idler Switch to “High”.
Arc Control Wire/Stick dial to “Min”.
7.Start the engine.
8.Within 5 seconds after the top display reads
“Crd”, switch the range selector switch to the CV position and back to the 60A position a minimum of 5 times. Must end up in the 60A position.
9.The top display should read “001” for about 5 seconds, then read “CAL” for about 5 sec- onds. The top display will then read “30”. The bottom display will read
10.Repeat steps 2 & 3.
11.If the display is still off, turn the engine off.
12.Perform the Case Cover Removal and Replacement Procedure and tilt the control panel out.
13.Check all leads at J8 & J9 at the display board for continuity and poor connection. See the Wiring Diagram. Check for broken molex pins.
14.If all the leads are ok, perform steps 5 & 6 of the Control Input Test. Measure the volt- ages in step 6 at J8 pin 3 (pos. lead) to J9 pin 5 (neg. lead) instead of measuring at the J2 connector on the control board.
15.Turn the engine off.
16.If any of the voltages were wrong, replace the control board. If the voltages were ok, replace the display board.
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| Table F.5. |
|
RANGE SELECTOR SW. POSITION | FROM MIN. | TO MAX. |
CC | 30 amps | 375 amps |
300A | 140 amps | 300 amps |
230A | 100 amps | 230 amps |
150A | 70 amps | 150 amps |
90A | 50 amps | 90 amps |
60A | 30 amps | 60 amps |
CV | 10.5 volts |
