Panasonic KX-B620 Service Manual page 19

position
sensor.
input pin 27 1102.
of 1C102, at
home
position.
It must be
below +2V.
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
®
No printing
All black
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.
@ 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
@ 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