Main Control Pcb - Muratec MFX-1300 Field Engineering Manual

2.2 Main Control PCB

The main control PCB controls the operations of all machine functions.
Jumper JP2 on the main control PCB is used for battery back-up of the SDRAM. Removing JP2 will
initialize the SDRAM. If the power is turned off, the battery will provide up to 72 hours (8MB) of back-up
when fully charged.
Jumper JP1 on the main control PCB is used for battery back-up of the SRAM. All user programmed data
and internal memory switch settings are held in SRAM. Removing JP1 will initialize the SRAM.
If the power is turned off, the battery will provide up to five years of back-up when fully charged.
NOTE: JP1, JP2 should remain in the "ON" position at all times.
Memory (FLASH MEMORY, SRAM, SDRAM)
FLASH MEMORY - - - The FLASH MEMORY contains all program instructions for unit operation.
SRAM - - - The SRAM, which is backed-up by a lithium battery is used to store user programmed
information.
SDRAM - - - The SDRAM is used for buffer, which is backed-up by a battery is used to store memorized
documents.
MFX-1300/MFX-1200:
NCU PCB
+24V, +5V, GND
+12V, -12V
POWER SUPPLY
UNIT
AC 120V
HIGHT VOLTAGE
POWER SUPPLY
UNIT
MAIN CONTROL PCB
TXA
LPF
RXA
TONE
CI
OH
+24V, +12V, -12V,
+5V, GND
PRINTER
UNIT
+24V, +5V, GND
ADF MOTOR
FBS MOTOR
SDRAM
MFX-1300/MFX-1200 Main Control PCB block diagram
BUFFER
MODEM
IC
SRAM
SYSTEM
G/A2
PRINTER
CONTROL
2
PRINTER
CONTROL
1
SYSTEM
G/A1
MOTOR
CONTROL
SDRAM
SDRAM
Lithium Battery
CONNECTOR (SCANNER) PCB
2-5
Monitor
Speaker
Control
PANEL PCB
LOGIC IC
LCD
CPU
KEY
RS232C
FLASH ROM Battery PCB
Ni-MH
Battery
SDRAM
SDRAM
Extension Memory
CCD
IMAGE
PROCESSING
LED LAMP
IC