HP 4300 Service Manual - Page 306
DC controller PCA. See, PRINTER ERROR, For help press, To continue press, To continue turn off then
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Page 306 highlights
Table 42. Numerical printer messages (continued) Message Description Action 55.X PRINTER ERROR For help press alternates with 55.X PRINTER ERROR To continue press The DC controller is not 1. Press the SELECT ( ) button communicating with the formatter. to continue. The problem could be caused by 2. Turn the printer off and then a timing error or an intermittent on. connection. 3. Reseat the connectors between the DC controller PCA and the formatter. 4. If the problem persists, replace the DC controller PCA. See "DC controller PCA" on page 181. 5. Replace the formatter. See "Formatter assembly" on page 161. 56.1 PRINTER ERROR To continue turn off then on Unknown input device installed. 1. Turn the power off and then on. 2. Reinstall all paper input trays. 3. Remove all non-HP paper-handling devices. 56.2 PRINTER ERROR To continue turn off then on Unknown output device installed. 1. Turn the power off and then on. 2. Reinstall the stacker or stapler/stacker. 3. Remove all non-HP paper-handling devices. 286 Troubleshooting Q2431-90912
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