Sony UP-D70XR, Service Manual

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2-2
UP-D70XR
(2) Resistance value data ROM replacement
This unit has a resistance value data ROM against the each thermal head. After thermal head
replacement, IC205 on the SY-270 board should be changed to new ROM attached.
(3) TOTAL PRINT Reset
According to page 5-12, TOTAL PRINT quantity should be reset.
(4) Printing check
After entering in service mode, test pattern printing is performed. Ensure the following items.
.
Is density of each step the most suitable?
If density is not suitable, after entering the ADJUST mode, head voltage should be finely adjusted.
.
Is there unevenness density toward the thermal head element?
Resistance value data ROM should be inserted. Attachment of the thermal head should be checked.
After checking, loosen the four screws (PSW 3
x
8) on the heat sink and finely adjust its position.
2. When Replacing EEPROM or MEC-11 Board
When replacing EEPROM or MEC-11 board (that has EEPROM), content of EEPROM is indefinite
value. Each kind establishment value is needed to return at initial value. Adjustments should be needed.
(1) EEPROM reset
After entering in service mode, EEPROM should be reset.
(2) Adjustments
After entering in ADJUST mode, setting of letter or A4 size, setting of Std or lami, luminance
quantity adjustment of three kinds of sensors should be performed.
(3) Test pattern printing
(4) Thermal head fine adjustment
Density of paper of item (3) should be checked, if necessary, thermal head voltage fine adjustment
should be performed.
3. When Replacing Bar Code, Ribbon Code and OHP Sensors
After entering ADJUST mode, luminance quantity adjustment for replaced sensor should be performed.
Loosen the screws
(PSW 3
x
8)
Loosen the screws
(PSW 3
x
8)
Heat sink