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| TROUBLESHOOTING & REPAIR |
OUTPUT RECTIFIER TEST (CONTINUED)
FIGURE F.15 – OUTPUT RECTIFIER TEST
I ON
POWERWAVE 455/R | O OFF |
|
NEGATIVE |
|
OUTPUT | STT OUTPUT |
TERMINAL | TERMINAL |
| POSITIVE (+) |
| OUTPUT |
| TERMINAL |
TEST PROCEDURE
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1.Remove main input supply power to the Power Wave 455/R.
2.Remove the case top and sides and perform the Input Filter Capacitor Discharge pro- cedure.
3.Using the 5/16” wrench, remove and insu- late lead 202A from the negative output ter- minal.
4.Remove any output load that may be con- nected to the Power Wave 455/R.
5.With the analog ohmmeter, measure the resistance between the positive and nega- tive output terminals (NOT the STT termi- nal). Refer to Figure F.15.
IMPORTANT: The positive (+) meter probe must be attached to the positive (+) output ter- minal and the negative
6.If the reading is more than 200 ohms, the output rectifier modules are not shorted. If the reading is less than 200 ohms, one or more of the rectifier modules are shorted. Refer to the Output Rectifier Module Replacement procedure.
7.Reconnect lead 202A to the negative output terminal.
8.Replace the case top and sides.
