Instruction manual

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Chapter 4 Preparing the Printer for Maintenance
Preparing the Printer for Maintenance
WARNING Unplug the printer power cord from the printer or power outlet before
you do any maintenance procedure. Failure to remove power could
result in injury to you or damage to equipment. If you must apply power
during maintenance, you will be instructed to do so in the maintenance
procedure.
IMPORTANT Do not attempt field repairs of electronic components or assemblies. Do
not de-solder any circuit board components. Replace a malfunctioning
electronic assembly with an operational spare. Most electronic
problems are corrected by replacing the printed circuit board assembly,
sensor, or cable that causes the fault indication. The same is true of
failures traced to the hammer bank: replace the entire shuttle frame
assembly. It is not field repairable. Hammer spring assemblies are the
only replaceable components of the shuttle frame assembly.
To prepare the printer for maintenance, do the following steps before you
make any adjustments:
1. Set the printer power switch to O (off).
2. Unplug the printer power cord from the printer or AC power source.
3. Disconnect the data (signal) cable from the printer interface.
4. Open the printer cover.
5. Unload paper.
6. Remove the ribbon.
7. Read the entire maintenance procedure before you begin working on the
printer.
8. Gather the necessary parts before you begin working on the printer.