TOC
TOC
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER RESISTANCE TEST (continued)
9.Check all leads connected to the input rectifier. Check for looseness or shorted wires.
10.Using an analog type meter, perform the resistance test Steps A through L accord- ing to the Table F.1.
NOTE: If terminals AC1, AC2, and AC3 of the input rectifier are not easily accessible, use terminals T1, T2, and T3, respectively, of main con- tactor CR1 for the resistance mea- surements. Similarly, if terminals POS and NEG of the input rectifier are not easily accessible, use ter- minals POS and NEG of the recon- nect switch for the resistance mea- surements.
11.After the test is completed and the prob- lem successfully repaired, reconnect the negative leads to the reconnect switch. Fasten the reconnect switch assembly back into position on the machine.
NOTE: If input rectifier was shorted, other components may be faulty. Perform Field Effect Transistor/ Switch Board Test and check for “leaky” or “shorted” capacitors.
12.Install the machine case sides and top.
13.Install the handle and the lift bail rubber gasket.
TABLE F.1 – INPUT RECTIFIER RESISTANCE VALUES
Step |
| Place | Place |
|
|
(See |
| + Lead | - Lead |
|
|
Note) | Test for | on . . . | on . . . | If . . . | Then . . . |
|
|
|
|
|
|
A | 1K Ohms | POS | AC1 | >1K Ohms | Go to step B. |
|
|
|
| <100 Ohms | Tested failed. |
B | 1K Ohms | POS | AC2 | >1K Ohms | Go to step C. |
|
|
|
| <100 Ohms | Tested failed. |
C | 1K Ohms | POS | AC3 | >1K Ohms | Go to step D. |
|
|
|
| <100 Ohms | Tested failed. |
D | 1K Ohms | AC1 | NEG | >1K Ohms | Go to step E. |
|
|
|
| <100 Ohms | Tested failed. |
E | 1K Ohms | AC2 | NEG | >1K Ohms | Go to step F. |
|
|
|
| <100 Ohms | Tested failed. |
F | 1K Ohms | AC3 | NEG | >1K Ohms | Go to step G. |
|
|
|
| <100 Ohms | Tested failed. |
G | <100 Ohms | AC1 | POS | <100 Ohms | Go to step H. |
|
|
|
| >1K Ohms | Test failed. |
H | <100 Ohms | AC2 | POS | <100 Ohms | Go to step I. |
|
|
|
| >1K Ohms | Test failed. |
I | <100 Ohms | AC3 | POS | <100 Ohms | Go to step J. |
|
|
|
| >1K Ohms | Test failed. |
J | <100 Ohms | NEG | AC1 | <100 Ohms | Go to step K. |
|
|
|
| >1K Ohms | Test failed. |
K | <100 Ohms | NEG | AC2 | <100 Ohms | Go to step L. |
|
|
|
| >1K Ohms | Test failed. |
L | <100 Ohms | NEG | AC3 | <100 Ohms | Input Rectifier OK |
|
|
|
| >1K Ohms | Test failed. |
|
|
|
|
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