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TROUBLESHOOTING & REPAIR
K941-1 REMOTE CONTROL KIT TRIGGER CIRCUIT TEST (continued)
FIGURE F.49 - DISPLAY BOARD PLUG LOCATIONS
J17 J16 J15 J14 J13 J12 J11 J10
TEST PROCEDURE | WARNING |
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NOTE: Before troubleshooting the remote con- trol trigger circuit, troubleshoot the remote control kit itself. Refer to the
1.Remove main input supply power to the machine.
2.With the 3/8" nut driver, remove the 4 screws that hold the handle to the machine.
3.Remove the rubber gasket (cover seal) from the lift bail.
4.With the 5/16" nut driver, remove the sheet metal screws from the case top.
5.With the 5/16" nut driver, remove the screws holding the right and left case sides. Remove the case sides by lifting up and out.
6.Perform the Capacitor Discharge Procedure described earlier in this section of the manual.
Before continuing with the test procedure, perform the capacitor discharge proce- dure to avoid electric shock.
7.After you have completed the capacitor discharge procedure for all four switch boards, remove the PC board cover. Use the 5/16" nut driver.
8.Remove plug J12 from the display board.
9.Place a jumper wire between pins D and E of the
10.Remove the 5 leads ( 3 heavy and 2 small) T1, T2, T3 from main input contactor CR1. This is a safety precaution. It prevents high voltage from being put on the machine during the test. Wrap tape around the lead ends to insulate them and prevent them from touching.
