Read Sharp MX-2301N (serv.man19) Technical Bulletin online
Sharp Electronics (UK) Ltd., Document Systems Support
1/5
Date:
12
th
of March 2015
Model:
All Models
Ref.:
ARE1170
Colour:
White
Page:
1 of 5
TECHNICAL BULLETIN
Handling of EEPROM’s
1. Content
handling of EEPROM’s installed on the device.
work
with
great
caution.
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■■■ Cautions for Replacement of EEPROM ■■■
[1] The case which requires EEPROM replacement
(1) The cases which require usage of EEPROM (service parts)
- EEPROM was damaged while mounting or detaching.
- Inside EEPROM was damaged by for example, static charge generated while handling.
- EEPROM data were garbled (after inserting the EEPROM facing the opposite direction).
* EEPROM must be initialized and Serial No. must be written into EEPROM at Document
Systems Unit (in Nara factory). It is not allowed to use as it is without these procedures.
(2) The case which requires usage of EEPROM on PWB attached to the device
- Any cases other than (1) above
- Replacement of PWB is required.
[2] Prohibitions for replacement of EEPROM
* EEPROM data will be garbled and “U2” trouble may result by performing any of followings.
(1) Mounting EEPROM to different model
(2) Mounting EEPROM on different PWB for same model
(3) Replacing only MFP control PWB or PCU PWB from same PWB for same model
(4) Mounting EEPROM facing the opposite of specified direction
(5) Mounting new EEPROM (without writing serial number and initializing EEPROM)
[3] About EEPROM supplied as service parts
■ EEPROM mounted on each PWB
■ EEPROM (Single item)
* It is not allowed to use as it is because it is not initialized.
EEPROM cannot be initialized in field for security reasons.
EEPROM must be initialized. Model name and serial number must be written into EEPROM for
MFP control PWB and PCU PWB.
(Please request above procedure via e-Quality to handle at Document Systems Unit
(in Nara factory)
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[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.
1
2
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No.
Cautions for handling
Cases reported in the past
Coutnermeasure etc.
1
Wear a ground strap to
handle PWBs.
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”.)
charge.
(Please refer to the Service Manual “Note for
handling PWB and electronic parts” in “NOTE FOR
SERVICING”.)
-
2
Do not insert EEPROM
into the socket facing
the opposite direction
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.
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”.
16.Turn off the power and
mount the EEPROM facing
the proper direction.
Step 2: Execute Sim 16 to
clear “U2 trouble”.
3
Do not mount
EEPROM on different
PWB (among PCU,
MFP, Scanner PWB
etc.)
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.
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.
-
4
Do not bend pins
around EEPROM
around EEPROM
The pins may be bent if the EEPROM is
detached/mounted several times.
detached/mounted several times.
-
5
Do not use styrene
foam for transportation
of EEPROM.
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.
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.
packing of service parts
EEPROM for transportation.
This sponge is made with
special material which does
not generate static charge.