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WARNING
ELECTRIC SHOCK can kill.
With input power ON, there are high voltages inside the machine, including the pro-
tection board. Do not reach into the machine or touch any internal part of the machine while power is ON.
10.Turn input power ON. Machine output must be OFF.
11.Measure the frequency between J23 - pin 4 and J23 - pin 2 on the control board. You should see between 3.2 and 5.3 divi- sions per cycle (950 to 1550 Hz.). If you do see this, the test is completed. If you do not see this, go to the next step.
12.Turn the power switch SW1 to the OFF position, disconnect input power to the machine, and perform the Capacitor Discharge Procedure.
14.Test leads #232 and #234 for continuity. These leads are between the protection board and the control board. Lead #232 is between J39 - pin 3 and J23 - pin 2. Lead #234 is between J39 - pin 2 and J23 - pin 4. These leads must be intact for the fre- quency signal to be measured, because the transistor side of the optocoupler needs the power from the control board.
15.If all the leads tested in step 14 are okay, make sure that the molex plugs are all plugged in correctly and pushed far enough into their headers. Check the fre- quency again on the oscilloscope.
16.If the frequency is still incorrect, the pro- tection board may be faulty. Replace the protection board and perform the Dynamic Capacitor Balance Test again.
17.If the frequency is still incorrect, the con- trol board may be faulty. Replace the con- trol board.
18.Install the machine case sides and top.
19.Install the handle and the lift bail rubber gasket.
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WARNING
Before continuing with the test procedure, per- form the capacitor discharge procedure to avoid electric shock.
13.After you have completed the capacitor discharge procedure for all four switch boards, with the volt/ohmmeter, test leads 9J, 9K, 12J, and 12K for continuity between the between the reconnect switch and the protection board.
