DESCRIPTION:
When the printer is turned on it should automatically perform a series of
electro-mechanical operations to initialize itself before printing.
The following table is composed of FIXES for typical PROBLEMS which may
occur during power-on initialization.
YOU WILL NEED:
1. Level I Technical Procedures
2. Pen-light
BEFORE YOU START:
1. Refer to the Technical Procedures if removal/replacement or
adjustment procedures are needed.
2. If a replacement module/part doesn't fix the problem, reinstall the
original module/part.
INSTRUCTIONS:
1. When you turn on the DMP, it should initialize itself as follows:
(1.1) light the Power lamp.
(1.2) rotate the platen one line backwards and then one line forwards.
(1.3) move the carriage to its leftmost position and stop.
(1.4) light the Select lamp.
2. Find your PROBLEM below and perform the corresponding FIX.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
PROB: The power lamp does not light when the DMP is turned on.
FIX: Recheck for the problem after each of the following steps:
(1) Check that power is turned on.
(2) Check that the power cord is plugged in.
(3) Check the power fuse at the back of the printer.
If it is burned out, replace it and turn power on
again. If the fuse blows a second time, replace
components in this order:
* Regulator Transistor
* CPU PC board
* Carrier Motor
* Transformer
(4) Check the two fuses on the CPU board and replace if blown.
(5) Replace the following components. Recheck for the problem
after each replacement.
* Power cord
* Power switch
* CPU PC board
* Carrier Motor
* Transformer
PROB: The platen does not rotate one line backward and then one line
forward when the printer is turned on.
FIX: Recheck for the problem after each of the following steps:
(1) Remove the carrier cover and the paper cover. Use the pen-light
to examine the gears for obstructions.
(2) Check for loose connectors as you follow the procedure to replace
the main logic PCB found in the Tech Procedures.
* If you find a loose connector, don't replace the main logic
PCB but instead install the connector securely.
* If you don't find a loose connector, replace the main logic PCB.
(3) Replace the mechanical assembly
PROB: The DMP does not move the carriage smoothly from its rightmost
to its leftmost position and stop as the printer is turned on.
FIX: Recheck for the problem after each of the following steps:
(1) Check if carrier wire is strung properly.
(2) Check for loose connectors as you follow the procedure to replace
the main logic PCB found the Technical Procedures
* If you find a loose connector, don't replace the main logic PCB
but instead install the connector securely.
* If you don't find a loose connector, replace the main logic PCB.
(3) Replace the Carrier motor.
PROB: There is a burning odor, erratic carrier motion, or erratic platen
rotation when the printer is turned on.
FIX: Check for the problem after replacing each of the following parts.
If the problem remains, leave the part installed and replace the
next part:
(1) CPU PC board
(2) Carrier motor
(3) Mechanical assembly
(4) Transformer
(5) When the problem no longer occurs, reinstall the parts that
you've replaced and recheck for the problem. If another problem
occurs, reperform this procedure.