Olympus OEP-3 Service Manual page 95

There are several types of test patterns. Four standard patterns are as shown below.
1 STEP (H)
3 RAMP (H)
3-1-2. Density Adjustment During Thermal Head Replacement
1. Output test pattern STEP (V) referring to "3-1-1. Output of Test Pattern (Internal Signal)".
2. Press the PRINT key and print test pattern STEP (V) before replacing the thermal head. (The print
result is used as the reference of density.)
3. Replace the thermal head.
4. After thermal head replacement, print test pattern STEP (V) again and adjust the density.
5. Reset the number of head print sheets.
1. To increase (decrease) the print density
(1) Press the ↑ and ↓ keys and move the cursor to "HEAD V:**SET [EXEC]" in a service menu.
(2) Press the ← and → keys and increase the value of numbers displayed in hexadecimal.
Increase the value: The head supply voltage increases.
Decrease the value: The head supply voltage decreases.
(3) Press the EXEC key to define the voltage.
(4) Press the PRINT key and print test pattern STEP (V).
Adjust HEAD V repeatedly until the print result becomes almost the same in density as the reference
printed before head replacement.
OEP-3 V1 (UC)
2 STEP (V)
4 RAMP (V)
3-3