8 - 3 4
Confidential
8.5.16 Initial Adjustment of PWM Value (Aging of the Head/Carriage Unit)
(Function code 69)
Function code 69 is not supported in the maintenance program embedded in the flash ROM of the
MFC3240C/FAX1840C U.S.A./Canadian models. To use Function code 69 in these models, you
need to temporarily load the full maintenance program onto the flash ROM. Refer to
n
Function
This function obtains the initial value of the PWM by aging the head/carriage unit and writes it onto
the EEPROM, as well as checking the head drive voltage level.
This aging procedure should be performed if you replace the head/carriage unit, carriage motor, or
CR encoder strip or if you loosen the timing belt.
NOTE:
Opening the top cover during the aging procedure will result in an error. If you perform this
aging procedure with the top cover opened, the machine will slowly age the head/carriage unit
resulting in an error after completion of the aging.
n
Operating Procedure
(1) Press the
6
and
9
keys in this order in the initial stage of the maintenance mode.
The machine starts aging the head/carriage unit, showing the "CR AGING" on the LCD.
In each of travel speeds 40, 33.3, 32.0 and 20, the machine checks whether the maximum and
minimum speeds are within the specified range.
If both are within the range, the machine automatically returns to the initial stage of the
maintenance mode.
If either one is out of the range, the machine beeps and shows some message, e.g., "40O 30X
32X 20O" on the LCD. This sample message indicates that the speed variation is within the
allowable range when the head/carriage unit travels at 40 or 20 inches/sec.; however, it is out of
the range at 30 or 32 inches/sec.
To return to the initial stage of the maintenance mode, press the
Stop/Exit
key.
Summary of Contents for FAX 1840C
Page 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC3340CN 3240C FAX1940CN 1840C 1835C ...
Page 9: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 18: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 50: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 91: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 96: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 167: ...5 69 Confidential Viewed from the left ...
Page 171: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 191: ...6 18 Confidential Vertical Alignment Check Patterns ...
Page 193: ...6 20 Confidential Margin Check Pattern ...
Page 202: ...Confidential CHAPTER 7 CLEANING ...
Page 205: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 216: ...8 9 Confidential Scanning Compensation Data List a b c d e f i ...
Page 236: ...8 29 Confidential 1st sheet 2nd sheet Vertical Alignment Check Patterns ...
Page 239: ...8 32 Confidential Margin Check Pattern ...
Page 249: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 253: ...9 2 Confidential ...
Page 254: ...9 3 Confidential ...
Page 371: ...B Power Supply PCB U S A and Canadian models Confidential ...
Page 372: ...B Power Supply PCB European and Asian models Confidential ...
Page 401: ...Confidential February 05 SM FAX032 8XA901 5 Printed in Japan ...