Specifications

REV.-A
4.4 PRINTHEAD DRIVE VOLTAGE ADJUSTMENT
Printhead drive voltage of each printhead should be adjusted individually, because all printheads are
not exactly of the same characteristics.
If it is not adjusted properly, print quality will be degraded. This adjustment is required when the
printhead or the printer mechanism is replaced. It is also required when the MAIN board is replaced.
The voltage for each
printhead is determined by measuring the characteristics of each printhead during
the production line. You can realize this voltage by setting the jumper located on the MAIN board.
[Step 1] Remove the printer mechanism. (Refer to section 3.2.4.)
[Step 2] Check the
printhead drive voltage in one of the following ways.
(1) When only the MAIN board is replaced:
Remove the
printhead from the carriage and check the head drive voltage printed at the
bottom, and then put it back onto the carriage.
(2) When the
printhead is replaced:
Check the head drive voltage printed at the bottom of the
printhead.
(3) When the printer mechanism is replaced:
Check the head drive voltage printed on the notice sheet on the spare printer mechanism.
(See Figure below.)
Notice Sheet
I
/
I
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Printer Mechanism Unit
Figure 4-6. Notice Sheet on Spare Printer Mechanism
[Step 3] Confirm the jumper settings (Jumper 5 and 6) referring to Table 4-1.
4-5