Controller board service check (Continued)
FRU | Action |
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LVPS/HVPS | Verify main power to controller board |
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| With the printer off, unplug the LPS/HVPS cable at J502 on the controller board. Verify | ||||
| grounds on pins 10, 12, 14, 16 and 18 for both the cable and the controller board. If any of | ||||
| these grounds are incorrect, then check the cable for continuity. If the cable fails continuity, | ||||
| then call the next level of support. |
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| Turn the printer on with the cable still unplugged, and verify the following on the cable | ||||
| (controller board will not be powered): |
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| Pins | Voltage |
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| 6, 17, 19 | +24 V dc |
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| 1, | +5 V dc |
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| 15 |
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| If any of the voltages are incorrect, then replace the LVPS/HVPS. See “Dead machine | ||||
| service check” on page |
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Cooling fan service check |
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FRU | Action |
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Cooling fan | Make sure the fan cable plug is properly seated at J9 (controller board). | ||||
| Turn the printer on. Within a few seconds, the controller board assembly should apply | ||||
| +24 V dc to pin 2. |
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| • | If voltage is not present, then check or replace the controller board. See “Controller | |||
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| board removal” on page |
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| • | If voltage is present, then check pin 1 for 24 V dc as well. If it is close to 24 V dc while | |||
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| the fan is still idle, then replace the fan. See “Fan removal” on page | |||
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Cover interlock switch service check
Note: Make sure a print cartridge assembly is installed and the cover closes all the way, engaging the cover open switch lever.
FRU | Action | |
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Cover interlock switch | Disconnect the cover interlock cable from the controller board at J7. | |
| With the printer turned off: | |
| 1. Verify continuity between cable pin 1 and pin 2 with the door closed and discontinuity | |
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| with the door open. |
| 2. Verify continuity between cable pin 1 and pin 3 with the door open and discontinuity with | |
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| the door closed. |
| 3. Verify discontinuity between cable pins 2 and 3 whether the door is open or closed. | |
| • | If any fail, then replace the cover interlock switch. |
| • | If both pass continuity, then turn the printer on, and measure +5 V dc on pin 2 at J7 on |
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| the controller board. |
| • | Verify pin 3 at J7 is ground. |
| • | If voltage or ground is not present, then see “Controller board service check” on |
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Diagnostics information
