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| TROUBLESHOOTING & REPAIR | |||
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TOC | TOC |
| ACTIVE SCR RECTIFIER ASSEMBLY TEST (CONTINUED) |
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Section | Master |
| 7. Connect the Tester to the SCR 1 as | 10. Close or keep closed switch |
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| shown in Figure F.7. |
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to | to |
| a. Connect Tester lead (A) to the | 11. Close switch |
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| and release and read meter. |
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Return | Return |
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| anode. |
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| b. Connect Tester lead (C) to the | a. If the voltage is 3 - 6 volts while |
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| the switch is closed and after |
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| cathode. | the switch is open, the SCR is |
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| functioning. |
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c.Connect Tester lead (G) to the
| gate. | b. | If the voltages is | ||
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| when the switch is closed or | ||
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| there is no voltage when the | ||
TOC | TOC |
| switch is | closed, the SCR is | |
| defective. |
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Section | Master |
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results of the test. | Repeat Battery Test | ||||
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| NOTE: Be sure battery is functioning | |||
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| properly. A low battery can affect the | |||
to | to | Procedure in Step 6 if needed. | |||
Return | Return | 12. Open switch | |||
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| 13. Reconnect the Tester leads. See | |||
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| Figure F.7. |
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| a. | Connect Tester lead (A) to the | ||
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| cathode. |
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| b. | Connect Tester lead (C) to the | ||
TOC | TOC |
| anode. |
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c. | Disconnect Test lead (G) from | ||||
Section | Master | ||||
| the gate. |
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to | to | 14. Close switch | |||
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Return | Return | 15. Read meter for zero voltage. | |||
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| a. | If the voltage is zero, the SCR is | ||
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| functioning. | ||
| FIGURE F.7 - SCR Tester Circuit and | b. | If the voltage is higher than | ||
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| zero, the SCR is shorted. | |||
| SCR connections. |
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TOC | TOC | 8. | Close switch | 16. | Perform the Active Test Procedure | |
NOTE: Switch |
| outlined in Steps | ||||
18. | Replace all Molex Plugs onto the | |||||
Sectionto | Masterto |
| a. If the voltage reading is higher | |||
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| 9. | Read meter for zero voltage. | 17. | Replace all SCR assemblies that do | |
Return | Return |
| not pass the above tests. | |||
| than zero, the SCR is shorted. |
| Control Board and connect leads X2 | |||
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| and X3. | |
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