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7
Troubleshooting
106
7 Troubleshooting
7.1 How to Use This Section
1. If a component on a P.W.Board or any other functional unit including
motor is defective, the booklet only instructs you to replace the whole
P.W.Board or functional unit and does not give troubleshooting
procedure applicable within the defective unit.
2. All troubleshooting procedures contained herein assumes that there
are no breaks in the harnesses and cords and all connectors are
plugged in the right positions.
3. For the removal procedure of covers and parts, refer to the
"DISASSEMBLY/CLEANING" section.
4. "GND" indicated in this booklet represents a 0-volt line of the circuit
concerned, equivalent to chassis ground; however, be sure to use the
Test Point (TP) on the PWB-D when creating a closed-circuit or
measuring voltage.
5. The procedures are given in the order of greater frequency of
occurrence of malfunctions and in the order of operation.
6. The procedures preclude possible malfunctions due to noise and other
external causes.
7. Refer to the wiring diagram of Appendix for wiring of electrical parts.
8. Since this manual has not indicated the trouble of the printer, refer to
the service manual of the printer.