Pcb Main - Muratec MFX-2500 Field Engineering Manual

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5.2.50 PCB Main

1. Remove the rear cover (upper). (See 5.2.47.)

2. Remove the shield plate. (See 5.2.49.)

3. Disconnect the all connectors on the PCB Main and remove the five screws, then remove the PCB

Note: Before replace the Main board, it is advisable to print the machine settings, fax settings, copy

settings, one-touch and speed dial listings to help in reprogramming these information.

Note: Jumper JP2 on the main control PCB is used for battery back-up of the DRAM. Any documents

stored in DRAM. Removing JP1 will initialize the DRAM.

Jumper JP1 on the main control PCB is used for battery back-up of the SRAM. All user

programmed data and internal machine parameter, memory switch and unique switch settings

are held in SRAM. Removing JP2 will initialize the SRAM.

Confirm the each Jumper is ON.

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