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TROUBLESHOOTING & REPAIR
ACTIVE SCR TEST (continued)
FIGURE F.16 – THERMAL FAN/SNUBBER BOARD AND FIRING BOARD PLUG LOCATIONS
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THERMAL FAN / SNUBBER
LED2
LED5
LED1
LED6
LED4
LED3
PLUG J20 |
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| PLUG J9 | |||||||||||||
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LED7 | LED8 | LED9 |
| J5 |
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LED1 |
| LED2 |
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| LED10 | J6 |
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LED3 |
| LED4 |
| J7 |
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| LED6 |
| J4 |
LED5 |
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| FIRING BOARD |
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TEST PROCEDURE
1.Disconnect the main AC input power to the machine.
2.Locate and disconnect plug J9 from the thermal fan/snubber board and plug J5 from the firing board. See Figure F.16.
3.Remove the red insulating paint from the heat sink test points. See Figure F.17. DO NOT DISASSEMBLE THE HEAT SINKS.
