DOWNLOAD Sharp MX-M623U / MX-M753U (serv.man32) Service Manual ↓ Size: 203.32 KB | Pages: 5 in PDF or view online for FREE

Model
MX-M623U MX-M753U (serv.man32)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
203.32 KB
Type
PDF
Document
Service Manual / Technical Bulletin
Brand
Device
Copying Equipment / IMPORTANT Handling of EEPROM's.
File
mx-m623u-mx-m753u-sm32.pdf
Date

Sharp MX-M623U / MX-M753U (serv.man32) Service Manual / Technical Bulletin ▷ View online

 
Sharp Electronics (UK) Ltd., Document Systems Support
 
 
3/5 
 
[4] Handling EEPROM’s in case replacement of PWB is required 
 
    - Make sure to remove the EEPROM on PWB purchased as service parts if replacement of PWB   
 
      is required. Remove the EEPROM from the PWB attached to the device and mount it to the   
 
   new PWB.  
 
      Caution: If service parts EEPROM is mounted as it is without initialization, U2 trouble occurs   
 
   100% of the time. 
 
      It is impossible to clear the “U2 trouble” by executing Sim 16 unless the EEPROM is initialized. 
 
 
  <Procedure> 
 
      Remove EEPROM from new PWB. 
 
      Remove EEPROM on the PWB attached to the device and mount on new PWB. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
* Find a tool you can insert into back 
side of the EEPROM (ex. straight 
slot screwdriver). Using the tool, 
move right and left side of the 
EEPROM slowly and gently to 
remove from the PWB. 
Handle with care so that EEPROM 
and PWB won’t be damaged and 
pins won’t be bent. 
Sharp Electronics (UK) Ltd., Document Systems Support
 
 
 
4/5 
 
No. 
Cautions for handling 
Cases reported in the past 
Coutnermeasure etc. 
Wear a ground strap to 
handle PWBs. 
EEPROM data may be garbled due to static 
charge. 
(Please refer to the Service Manual “Note for 
handling PWB and electronic parts” in “NOTE FOR 
SERVICING”.) 
Do not insert EEPROM 
into the socket facing 
the opposite direction 
“U2 trouble” occurs 100% if you turn on the device 
while mounting the EEPROM facing the opposite 
direction. The EEPROM may be damaged due to 
excessively high temperature. 
The data may be garbled even if you could avoid 
the damage. 
When Sim 16 is executed to clear the “U2 trouble”, 
the garbled data may result. 
It is impossible to repair in field once the data are 
garbled. 
Step 1: Don’t execute Sim 
16.Turn off the power and 
mount the EEPROM facing 
the proper direction. 
Step 2: Execute Sim 16 to 
clear “U2 trouble”. 
Do not mount 
EEPROM on different 
PWB (among PCU, 
MFP, Scanner PWB 
etc.) 
“U2 trouble” occurs 100% if you turn on the device 
while mounting the EEPROM in improper location. 
In addition, the data may be garbled.   
When Sim 16 is executed to clear “U2 trouble”, the 
garbled data may result. 
It is impossible to repair in field once the data are 
garbled. 
Do not bend pins 
around EEPROM 
The pins may be bent if the EEPROM is 
detached/mounted several times. 
Do not use styrene 
foam for transportation 
of EEPROM. 
Styrene foam can generate static charge easily. 
There are cases where EEPROM is damaged just 
by inserting the EEPROM into the styrene foam. 
Use black sponge used for 
packing of service parts 
EEPROM for transportation. 
This sponge is made with 
special material which does 
not generate static charge. 
 
 
 
Sharp Electronics (UK) Ltd., Document Systems Support
 
 
5/5 
[5] Cautions for prevention of EEPROM breakage   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
[Important] 
 
SIM16 is the simulation to clear the trouble when U2 trouble occurs even though any service (repair or maintenance etc.) has not been 
performed. 
 
As described above, this SIM cannot clear U2 trouble caused by the human error.    EEPROM will be rather broken 
 
if this SIM is executed. 
 
 
Counter data and the adjustment values of the machine are also logged in EEPROM. 
 
EEPROM with data garbled cannot be repaired even at Nara factory and the initialization is only the option. 
 
Once EEPROM is initialized, the counter data is reset to "0", which will complicate the management of account billing data based on counters. 
In some cases it may cause dealers a loss.(e.g.: Even though 3,000 pages have run, it is not possible to charge the end user for the counter as 
there is no counter data.) 
 
 
Since all data including the adjustment values are reset to the default, all adjustment items need to be readjusted, "Which requires long hours 
of work"
 
 
Sharp Electronics (UK) Ltd., Document Systems Support
 
 
5/5 
[5] Cautions for prevention of EEPROM breakage   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
[Important] 
 
SIM16 is the simulation to clear the trouble when U2 trouble occurs even though any service (repair or maintenance etc.) has not been 
performed. 
 
As described above, this SIM cannot clear U2 trouble caused by the human error.    EEPROM will be rather broken 
 
if this SIM is executed. 
 
 
Counter data and the adjustment values of the machine are also logged in EEPROM. 
 
EEPROM with data garbled cannot be repaired even at Nara factory and the initialization is only the option. 
 
Once EEPROM is initialized, the counter data is reset to "0", which will complicate the management of account billing data based on counters. 
In some cases it may cause dealers a loss.(e.g.: Even though 3,000 pages have run, it is not possible to charge the end user for the counter as 
there is no counter data.) 
 
 
Since all data including the adjustment values are reset to the default, all adjustment items need to be readjusted, "Which requires long hours 
of work"
 
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Sharp MX-M623U / MX-M753U (serv.man32) Service Manual / Technical Bulletin ▷ Download