Panasonic KX-B620 - Page 19

Screen
sensor
problem
Check
the
=Adjustthe
—
Replace
mechanical
tension
of
the
condition.
the
screen.
screen.
Check
the
-—
Replace
screen
sensor
home
1C400.
position
sensor.
Check
the
-»Replace
input pin 27 1102.
of 1C102, at
home
position.
It must be
below +2V.
10-2.
FAULTY
COPY
SYMPTOM
r— No printing
All black
Dark printing
Faint printing
Density difference
between right and left
White line
White band
Black line
Black band
CG008 98088
First
check
the
mechanical
condition.
Next
the
thermal
head
signals
and
power
sources
must
be
checked,
it
will
indicate
whether
the
thermal
head
is
faulty
or
not.
if
all
the
above
checks
are
good,
the
thermal
head
is
faulty.
If
not,
check
the
CCD
board
and
control
board.
®
No printing
The
thermal
head
signals
must
be
checked.
If
they
are
proper,
the
thermal
head
is
faulty.
All black
"It
is
very
rare
that
the
thermal
head
is
faulty.
Perhaps
the
CCD
board
or
the
control
board is bad.
—17—
KX-B620 Series
| KX-B520 Series
Dark printing
Check the following.
® Faulty optical axis
@ Lack of light of the fluorescent lamp
@ Faulty CCD board
@ Faulty control board
@ Faulty mechanical condition of the
screen
@ |f achart is attached, attach it again
properly.
Faint Printing
Check the following.
®
Poor
contact
between
the
thermal!
head
and
the
platen
@ Dirty surface on blank area of the
screen
@ Dirty surface of the mirror
@ Dirty surface of the lens
@ Dirty surface of the CCD
® Dirty surface of the thermal head
@ Faulty optical adjustment
® Faulty CCD board
@ Faulty contro! board
Density
difference
between
right
and
left
@ Poor contact between the thermal head
and the platen
@ Faulty optical adjustment
White line
@ Faulty thermal head
@ Dirty surface of the mirror
@ Dirty surface of the lens
@ Dirty surface of the CCD
@ Dirty surface on blank area of the
screen
White band
@ Strobe pulses must be checked first.
@ Faulty thermal head
Black line
@ Dirty surface of the mirror
@ Faulty optical adjustment
Black band
® Faulty optical adjustment
@ Faulty thermal head