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PWSTOP
5.3 Electrical Operation
The main control unit uses the MB90706 controller dedicated to the printer. The controller contains Centronics
control and stepping
motor control circuits while using 16-bit MPU FFMC-16 as its core element. It thus implements high-speed,
compact, and low-cost control circuits.
The printer contains a full two-line buffer and performs normal/reverse automatic checking and printing to
implement high throughputs.
Firmware is put in modules to improve reliability.
5.3.1 Printed Circuit Boards and Basic Configuration
Table 5.3.1 lists the printed circuit boards used in this printer.
Alias of PC board
Drawing number
Major functions
Main board
GMC06**
KA21212-B**X
Main control circuit, drive circuit,
interface driver/receiver circuit
Control panel board
GAO99BA
CA21264-B91X
Serial/parallel converter LSI,
display lamps, control switches
Power supply board
PW37BZ(200V)
KA02951-0086
+34 V and +5 V power supply
(
X: PC board EC level
)
Table 5.3.1 Printed circuit boards
Figure 5.3.1 shows the basic configuration of this printer.
PWSTOP
PWS
Figure 5.3.1 Basic configuration
Note
EEPROM (part symbol IC30) mounted on the main board contains information on
adjusted values and consumables specific to the mechanism.
If the main board (GMC06**) of this printer is replaced, remove the EEPROM
package in advance from the main board and mount it on the new main board.
Control panel
Switches and lamps
(GAO99BA)
Printer
mechanism
Cut sheet feeder (*1)
Tractor kit (*2)
Main board (GMC06**)
Main control circuit
Motor and head drive circuits
Interface driver/receiver circuit
Power supply board
(PW37BZ)
+34V/+5V
(1-transofrmer
power supply)
Ho
st
co
mp
ut
er
*1: The cut sheet feeder is an option.
*2: The tractor kit is an option.
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