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REV.-A
4.3.5 Printing Alignment
This section describes the various printing alignment procedures.
4.3.5.1 Printing Alignment Items
The printing alignment can be divided into the following items:
•
Top edge holder position adjustment
•
Head slant adjustment
•
Bidirectional printing adjustment
All of the above adjustments can be executed without removing the printer mechanism.
Because the programs for the above adjustments are included in the adjustment cartridge, service
personnel can perform the adjustments (correctthe control circuits for the printer mechanism operation)
in accordance with the messages displayed on the LeD panel. The resulting values overwrite the
previous data stored in the control panel EEPROM. Only the head slant adjustment is performed by
actually adjusting the physical mounting position. This means that no data is stored for this adjustment.
Therefore, the program for this adjustment included in the adjustment cartridge is only a test program.
If any of the adjustments are skipped (see Figure 4-65), the previous data remains. Be careful not to
overwrite the data unnecessarily. The printing alignment is represented in two different ways in
"ADJUSTMENT REQUIRED" indicated in Section 4.2. What each representation means is described
below:
Example
•
Printing alignment (see Section 4.3.5):
Perform all the adjustment items described in this section.
•
Printing alignment (only for bidirectional printing) (see Section 4.3.5):
Perform only the bidirectional printing alignment described in this section. Skip the other adjustment
items.
When the control panel is replaced, no data is present in the new EEPROM.
Therefore, all the adjustment items must be performed. Each adjustment is described below:
Top edge holder position adjustment
This adjustment is required in the following cases:
•
When the TE motor is replaced
•
When the top edge holder is replaced
•
When any part related to the top edge holder mechanism is disassembled or replaced
This adjustment corrects for the difference between the number of steps the motor is driven to position
the top edge holder at the reference position and the actual position the top edge holder is at after
the motor is driven for the specified number of steps. The following problems might occur if the top
edge holder position at paper feeding time is not correct:
•
A paper jam could occur because the paper is not fed correctly during the paper feed/eject operation.
•
Printing may not be possible if the printhead strikes the top edge holder.
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