Olympus OEP-3, Service Manual

Page: 93 / 176

3-1
OEP-3 V1 (UC)
Section 3
Electrical Alignment and Mechanical Alignment
3-1. Electrical Adjustment
3-1-1. Output of Test Pattern (Internal Signal) in Service Mode
This mode is used when replacing the PRT-13 board, thermal head, power, and parts.
1. Density adjustment
The density must be adjusted during thermal head replacement.
(1) For the density adjustment, print test pattern STEP (V) in advance by the method below before
replacing the head and extract a reference sample.
(2) After replacing the head, print SETP (V) again and adjust the head voltage so that the density is
almost the same as that of the reference sample.
(3) After head replacement and voltage adjustment, reset the number of estimated head print sheets.
2. Extraction of sample for density adjustment
(1) Set an ink ribbon and paper.
(2) Set the power switch to ON while pressing the
←
and
→
keys simultaneously. The printer then
enters the service mode.
(3) Message “HIT ANY KEY” is displayed. Press any key.
(4) A menu is displayed.
(5) Move the cursor to “PRINT TEST:”.
(6) Press the EXEC key. A test pattern (STEP (V)) is then displayed on the monitor so as to start
printing.
At that time, the printer controls the thermal head temperature until it reaches a proper temperature.
.
When the head temperature is low: The printer performs preheating and starts printing after the
head temperature reaches a proper temperature.
.
When the head temperature is high: The printer performs cooling using a fan and starts printing
after the head temperature reaches a proper temperature.
n
If the head temperature is not proper, it may slightly take time to enter the print operation state after
you press the EXEC key.
3. Head voltage adjustment
(1) Set the power switch to ON while pressing the
←
and
→
keys simultaneously. The printer then
enters the service mode.
(2) Message “HIT ANY KEY” is displayed. Press any key.
(3) A menu is displayed.
(4) Move the cursor to “HEAD V:”.
(5) Press the
←
and
→
keys to increase or decrease the head voltage parameter. Next, press the
EXEC key to define the setting.
m
.
The head voltage does not change if you do not press the EXEC key.
.
By decreasing the parameter, the head voltage decreases and the density also decreases. By
increasing the parameter, the head voltage increases and the density also increases. This parameter
does not directly represent the head applied voltage value.