8.4 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS; 8.4.1 EEPROM Parameter Initialization (Function code 01/91); Procedure - Page 162

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8.4  DETAILED DESCRIPTION OF 

MAINTENANCE-MODE FUNCTIONS 

8.4.1  EEPROM Parameter Initialization (Function code 01/91) 

„

 Function 

The machine initializes the parameters, user switches, and firmware switches registered in  
the EEPROM, to the initial values.  Entering the function code 01 initializes all of  
the EEPROM areas, but entering 91 does not initialize some areas, as listed below. 

Function code

Data item 

01 91 

Maintenance-mode functions 

User switches 
Firmware switches 

These will be 
initialized. 

Remote activation code 

These will not be 
initialized. 

Station ID data 
Outside line number 

Telephone function registration 

One-touch dialing 
Speed dialing 
Group dialing 

All of these will be 
initialized. 

 
 
 
These will not be 
initialized. 

NOTE:

 If you replace the main PCB with the one used for any other machine, carry out this  

procedure and then customize the EEPROM (maintenance-mode function code 74 in  

Section 8.4.14

). 

„

 Operating 

Procedure 

(1) MFC7420/7820N  

Press the 

0

 and 

1

 keys (or the 

9

 and 

1

 keys according to your need) in this order in the 

initial stage of the maintenance mode. 

DCP7010/7020/7025 

Press the   key or   key several times to display the “MAINTENANCE 01” or 
“MAINTENANCE 91” code on the LCD. Then press the 

Set

  key

 .

The "PARAMETER INIT" will appear on the LCD. 

(2)  Upon completion of parameter initialization, the machine returns to the initial stage of 

the maintenance mode. 

(3)  Be sure to turn the machine power off. If you press the 

9 

key twice to exit from the 

maintenance mode without turning the power off, then the machine will not fully 
initialize the EEPROM.