24xx
| FRU | Action |
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6 | Logic Board | If no problem is found with the other |
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| components, but the power problem still |
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| remains, replace the logic board and reset |
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| “Bidirectional Print Adjustment” on |
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| page |
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Print Speed Service Check
The speed of the 24xx printers varies with the font, forms thickness setting and printhead temperature. Graphics output may print slowly due to data throughput limitations. Thermal sensing is built into the printhead on 249x printers and protects the printhead from overheating.
| FRU | Action |
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1 | Head Gap Sensor | Check the function of the head gap sensor by |
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| turning the printer on with the Macro button |
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| pressed. Open the operator panel to the |
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| second level and do the following: |
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| • With the forms thickness lever at 1, Macro |
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| LED 1 lights. |
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| • With the forms thickness lever at 2 and 3, |
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| Macro LED 2 lights. |
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| • With the forms thickness lever at 4 through |
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| 7, Macro LED 3 lights. |
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| Disconnect the head gap sensor from |
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| connector CN4 on the logic board. Place the |
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| forms thickness lever in position 1 and verify |
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| continuity at the following pin locations: |
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| CN4 - 1 and CN4 - 2 |
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| CN4 - 2 and CN4 - 3 |
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| Place the forms thickness lever in positions 2 |
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| and 3 and verify continuity at the following pin |
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| location: |
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| CN4 - 1 and CN4 - 2 |
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| Verify no continuity at forms thickness lever |
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| positions 4 through 7. |
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