MX-4100N, MX-4101N, MX-5000N, MX-5001N (serv.man147). ROM UPGRADE ... (3) - Sharp Copying Equipment Technical Bulletin (repair manual). Page 2

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[Description] 
No. Subject 
Description 
Main body control-
related 
The MFP screen would go blank and the MFP would fail to recover from power save 
mode if the MFP was in received fax preview mode and an attempt was made to recover 
the MFP from power save mode—either by a fax being received or by the user pressing 
the Power Save key—when 10 minutes or more had elapsed since the MFP entered 
power save mode after receiving a fax and retaining received data. This glitch has been 
corrected. 
Main body control-
related 
System time would automatically revert to a date roughly five years, five months, and 
eight days in the past for a period of at least 1 minute when the home, system 
configuration, or preview screens were operated after the power was turned on and then 
operated again around 6 hours later. This glitch has been corrected. 
Main body control-
related 
If the MFP main body is returned from the power saving status after the USB memory is 
inserted, the USB memory may not be recognized. This glitch has been corrected. 
4 Jam-related 
When FAX-received data of less than 3 lines is output, PPD2_PRI jam may occur. This 
glitch has been corrected. 
Fusing control-
relationship 
Fusing control has been changed so that the fusing pressure release amount can be 
changed in envelop mode to solve the envelop fusing fault.  
The fusing pressure release amount can be changed by the setting of the following engine 
software switch. 
Engine software switch (Sim55-1)   SW No.:12   Bit: 1,2,3 
 
 
6 UI-related 
A software switch has been added that enables the LCD display characters of this main 
body to be switched to bold characters. 
Controller software switch (SIM 55-3) SW No. 22   Data bit 7 
0: Standard (default) 
1: Bold characters 
7 UI-related 
Color items of "document filing print" have been added to the total paper usage count 
display screen. 
8 UI-related 
The operation panel screen display setting has been changed so that when the panel 
switch is turned off, the operation panel screen disappears after fusing pressure is released. 
9 Printer-related 
When copying the character string specified in PJL, the memory occasionally corrupts 
because the buffer size is small, resulting in incomplete printing from MacOS 10.5.6. This 
glitch has been corrected. 
10 Printer-related 
If ESC/P raster data (barcode data) exists at the end of the page, the data cannot be 
registered in the page buffer correctly because the page end processing is performed 
before the final raster data processing. If the data cannot be registered in the page buffer 
correctly, barcodes may not be printed correctly. This glitch has been corrected. 
 
 
 
 
Sharp Electronics (UK) Ltd., Technical Services Group
CCE-679 
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