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TROUBLESHOOTING & REPAIR
AUXILIARY TRANSFORMER TEST #2 (continued)
FIGURE F.7 - TRANSFORMER T1 AND T2 LOCATION
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1. AUXILIARY TRANSFORMER T1 WITH PLUG J73
2. PLUG J30
3. PROTECTION BOARD
TEST PROCEDURE
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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 Proce- dure described earlier in this section of the manual.
WARNING
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 J73 from the T1 transformer. T2 is connected in parallel with T1. Leaving the two transformers connected in parallel for the test might result in incor- rect readings; therefore plug J73 should be disconnected.
9.Remove plug J30 from the protection board. See Figure F.1 for location of the board and plug J30.
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.
