Circuit Operation - Panasonic KX-B620 Service Manual

13. CIRCUIT OPERATION
KX-B620 Series
KX-B520 Series
1. GENERAL BLOCK DIAGRAM AND FLOWCHART
The control section will be explained as shown in the block diagram.
1)
2)
3)
CPU (1C102) makes the timing signals for control of other circuits, for example CCD, Thermal Head.
Gate Array (1C103) makes the signals for Thermal Head, CCD, Shading correcting and A//D convert
LSI (1C109) from the signals of CPU.
LSI (1C109) compensates the shading distortion of the analog signal and converts it to the digital
signal.
Thermal Head contains the heating elements for the dot matrix image printing.
CCD image sensor is a 1,024 bit linear image sensor, and executes reading the document on the
screen.
Power Supply supplies +5V, +24V, +12V, -12V.
Lamp Driver drives the Lamp in a high frequency.
Motor Drivers drive the Screen Feed Motor and Paper Feed Motor.
GATE ARRAY (1C103)
cree THERMAL
RESET
CRATOR
(~)osc
HEAD
Le
THERMAL
HEAD
CONTROL
CPUCTC102)
OPERATION
PANEL
PAPER SENSOR
SCREEN SENSOR
POWER
FEED
| Seen |
MOTOR
LAMP
DRIVER
Fig. 9 Block Diagram