Electrical Operation; Printed Circuit Boards And Basic Configuration - Fujitsu Impact 3650 Maintenance Manual

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.
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.

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
Main board
GMC06**
Control panel board
GAO99BA
Power supply board
PW37BZ(200V)
（X: PC board EC level）
Figure 5.3.1 shows the basic configuration of this printer.
PWSTOP
Drawing number
KA21212-B**X
CA21264-B91X
KA02951-0086
Table 5.3.1 Printed circuit boards
Control panel
Switches and lamps
(GAO99BA)
Main board (GMC06**)
Main control circuit
Motor and head drive circuits
Interface driver/receiver circuit
Figure 5.3.1 Basic configuration
Major functions
Main control circuit, drive circuit,
interface driver/receiver circuit
Serial/parallel converter LSI,
display lamps, control switches
+34 V and +5 V power supply
Printer
mechanism
*1: The cut sheet feeder is an option.
*2: The tractor kit is an option.
129
Cut sheet feeder (*1)
Tractor kit (*2)
PWSTOP
Power supply board
(PW37BZ)
PWS
+34V/+5V
(1-transofrmer
power supply)