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| TROUBLESHOOTING & REPAIR |
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| CONTROL TRANSFORMER (T2) VOLTAGE TEST (continued) | |||||||||
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| RED (1) | 1 | 7 |
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| WHITE (7) |
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| RED (2) | 2 |
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| BLACK (3) |
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| BLACK (9) | 3 | 9 |
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| YELLOW (10) |
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| YELLOW (4) | 4 |
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| VIEWED |
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| BLUE (11) | 10 |
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| BLUE (5) | 5 | 11 |
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| ORANGE (12) |
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| ORANGE (6) |
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| 6 | 12 |
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PLUG P8
G2150 |
SQUARE WAVE 255 CONTROL |
FIGURE F.4 - CONTROL BOARD AND TRANSFORMER.
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7.Test the resistance from 8J14, on the protection/ snubber board, to the #432 lead at the control transformer. Also check resistance from 4J14, on the pro- tection/snubber board, to the #433 lead at the control transformer.
A.If zero ohms resistance is shown test is OK. Proceed to protection/ snubber board continuity test.
B.If resistance of any value is shown, check wires and connections.
8.Test for the correct AC voltages at Plug 8. See Figure
A.If one or more voltages are missing or incorrect, control transformer is faulty. Replace.
IMPORTANT: If the Control Transfor- mer is replaced refer to label on the new transformer for correct primary lead connections. If connected wrong, the machine will have no OCV output. If no OCV occurs reverse the control trans- former’s primary connections and re- check machine’s OCV.
Note: If main supply voltage varies, con- trol transformer voltages will vary accordingly.
Secondary |
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Lead Colors | Plug P8 | Voltages |
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Red to Red | 1 to 2 | 36 VAC |
Red to White | 1 to 7 | 18 VAC |
Yellow to Yellow | 4 to 10 | 16 VAC |
Black to Black | 3 to 9 | 24 VAC |
Orange to Orange | 6 to 12 | 16 VAC |
Blue to Blue | 5 to 11 | 16 VAC |
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