Main Control Pcb - Muratec MFX-1330 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.
NOTE: The SDRAM back-up battery is connected to the PCB MAIN. When the PCB MAIN is replaced,
the connection will be lost. Therefore, please reenter the date and time, after you have replaced
the PCB MAIN. (Press MENU, 2, 1, 0, 9, and enter month, then day, year, hour and minute in 24-
hour format.)
NOTE: Turning parameters for Color(R,G,B) and Gray mode are stored in the EEPROM(IC42). When the
PCB MAIN is replaced, the EEPROM on malfunction PCB should be replaced to the new PCB.
CCFL INVERTER
CCD
CCD PCB
FBS
MOTOR
ADF
MOTOR
POWER SUPPLY
UNIT
NCU PCB
TONE RXA
+24V,+12V,AREF
SDRAM
+24V
IMAGE
PROCESS
MFP
ENGINE
MOTOR
CONTROL
PRINTER
CONTROL
+24V,
+5V,+3.3V
AC
PRINTER
UNIT
Main control PCB block diagram
DISPLAY
PANEL
G/A
TXA
MONITOR
MODEM
CONTROL
CPU
FLASH
MEMORY
SRAM
SDRAM
+24V, MAIN CONTROL PCB
H.V.POWER
SUPPLY UNIT
2-3
KEY
PNAEL PCB
USB
Lithium
SDRAM
Extention Memory
Ni-MH
CENECTOR-B PCB