
2-13
2.5 Main Control PCB
The main control PCB controls the operations of all machine functions.
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 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 memo-
rized documents.
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.
FBS
MOTOR
ADF
MOTOR
NCU PCB
TONE RXA
TXA
DISPLAY
KEY
PANEL
CPU
PANAEL PCB A
PANAEL PCB B
MODEM
MONITOR
CONTROL
CPU
USB
SRAM
SDRAM
SDRAM
Ni-MH
H.V.POWER
SUPPLY UNIT
AC
PRINTER
CONTROL
MOTOR
CONTROL
IMAGE
PROCESS
CCD
SDRAM
INVERTER
CCFL
CCD PCB
+24V,
+24V,
+5V,+3.3V
MAIN CONTROL PCB
CENECTOR-B PCB
Extention Memory
Lithium
+24V
+24V,+12V,AREF
FLASH
MEMORY
POWER SUPPLY
UNIT
PRINTER
UNIT
MFP
ENGINE
Main control PCB block diagram
Содержание F-525
Страница 65: ...2 12 2 4 Interconnect Block Diagram See the attached files...
Страница 188: ...3 104 3 8 3 How to see the print out Example for fax transmission...
Страница 242: ...3 158 Sixth page of the detailed report or Errors Number of errors in transmission per G3 ECM and Super G3...
Страница 243: ...3 159 Seventh page of the detailed report or Errors Number of errors in reception and dialing per G3 ECM and Super G3...
Страница 252: ...3 168 6 Click OK 7 Click Next The driver will be installed on the PC...
Страница 253: ...3 169 8 Click Finish and finish the Found New Hardware Wizard...
Страница 263: ...3 179...
Страница 264: ...3 180...
Страница 317: ...5 27 5 Lift the Roller feed and slide out as shown below Then remove the ROLLER FEED Roller feed Roller feed...
Страница 353: ...5 63 6 Remove one bearing and slide out the ROLLER FEED DUPLEX ROLELR FFED DUPLEX...
Страница 382: ......
Страница 383: ......