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TEST PROCEDURE
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.Perform the following tests on the four switch boards:
Switch Board 1: (Switch Board 1 is Marked CAP 1 on the Switch Board Assembly Connection Decal - See Figure F.24.)
A.Remove quick connect terminals #401, #402, #9, and #12 from switch board 1.
B.With the volt/ohmmeter, check for 25 ohms resistance between lead #401 and #12E.
If the measurement reads between 20 and 30 ohms, resistor R1 and leads #401 and #12E are okay. Go to step C.
If the measurement does not read between 20 and 30 ohms, check for continuity in leads #401 and #12E. Then test for 25 ohms resistance across R1 directly. If the measurement does not read between 20 and 30 ohms, replace resistor R1.
C. With the volt/ohmmeter, check for 25 ohms resistance between lead #402 and #9E.
If the measurement reads between 20 and 30 ohms, resistor R2 and leads #402 and #9E are okay. Go to step D.
If the measurement does not read between 20 and 30 ohms, check for continuity in leads #402 and #9E. Then test for 25 ohms resistance across R2 directly. If the measurement does not read between 20 and 30 ohms, replace resistor R2.
D.With the volt/ohmmeter, check for 7.5 K- ohms resistance between lead #12L (12E) and #9L (9E).
If the measurement reads between 6.75 and 8.25
If the measurement does not read between 6.75 and 30
E.Reconnect quick connect terminals #401, #402, #9, and #12 on switch board 1.
Switch Board 2: (Switch Board 2 is Marked CAP 2 on the Switch Board Assembly Connection Decal - See Figure F.24.)
A.Remove quick connect terminals #403, #404, #9, and #12.
B.With the volt/ohmmeter, check for 25 ohms resistance between lead #403 and #12F.
If the measurement reads between 20 and 30 ohms, resistor R3 and leads #403 and #12F are okay. Go to step C.
If the measurement does not read between 20 and 30 ohms, check for continuity in leads #403 and #12F. Then test for 25 ohms resistance across R3 directly. If the measurement does not read between 20 and 30 ohms, replace resistor R3.
