SECTION 4
ELECTRICAL ADJUSTMENTS
[HEAD VOLTAGE ADJUSTMENT (POWER BLOCK)]
Before performing this adjustment, print the stair-step pattern two
times continuously with the old head (Note 1) or normal unit. The
second print will be used as a sample of the print density.
Note 1
: Only when the old head (faulty head) is not entirely dam-
aged with black or white lines.
Note 2
: To reproduce the stair-step pattern, refer to “Adjusting
Method 1”.
Mode
Mechanism stop state
I
Test pattern
I
+ : Pin
of
Measuring points
: Mechanism deck, metallic chassis
Measuring instrument Digital voltmeter
Adjustment element
I
Specification
Print density should be the same as the sample.
Adjusting method:
is
1) With the ribbon inserted, turn ON the
button, and while
holding the ribbon, move the ribbon ejection lever upward five
times. (Print stair-step pattern.)
2) After printing, repeat 1) immediately.
3) Compare the second printed pattern density with that of the sample,
and if the density differs, perform the following adjustment.
4) Adjust VR201 according to the print density.
If darker than the
the head voltage.
If lighter than the
the head voltage.
5) Print the stair-step pattern two times continuously.
6) Compare the second printed pattern density with that of the sample,
and if the density differs, repeat steps 3) to 6).
Note 2
: Only one print is required after the second time.
Stair-step
in
the power block (1-468-129-12).
Adjustment Location :
