Head Voltage Adjustment - Sony UP-D897 Service Manual

2-3. Head Voltage Adjustment
After replacing the thermal head or the switching regulator, perform this adjustment.
Before starting the replacement, print out the stairstep test pattern which is used as the reference of
adjustment.
Before replacing the switching regulator, measure the voltage of TP302 on the MA-132 board and take a
note of the value. ;
State during adjustment Adjustment point _
* Input signal: None @RV201/ Switching
* Set the switch to ON while Do not release the buttons before checking that regulator
pressing the and. the backlight blinks. Swing raculater
buttons. (right side)
When pressing the jog dial three times, :
"SVC", "PATAN", and "PA:CRS" are
displayed in order. Rotate the jog dial in
this state to display "PASTP" and press
the jog dial. Then, the stairstep test pattern
is printed.
ee
Test pattern
After replacing the switching regulator
Adjust @RV201 so that the voltage becomes
the same as the voltage of TP302 measured
before adjustment.
Print out the stairstep test pattern after
adjustment and check that it is in the same level
as the test pattern printed before adjustment.
After replacing the head
Adjust @RV201 so that the stairstep test
pattern becomes the same level as the test
pattern printed before adjustment.
UP-D897 2-3