Read Sharp AR-C270 (serv.man17) Service Manual online
[Necessary works when replacing the PWB or in case of memory trouble]
The EEPROM of the following PWB includes all the setup and adjust-
ment data.
ment data.
When replacing the PWB or in case of memory trouble, therefore, the
memory data must be replaced or reentered.
memory data must be replaced or reentered.
∗
EEPROM on PCU MAIN PWB (Stores the setup and adjustment
data of the engine section mainly.)
data of the engine section mainly.)
∗
EEPROM on ICU MAIN PWB (Stores the setup and adjustment
data related to image process mainly.)
data related to image process mainly.)
(Case 1) Works after replacing PCU MAIN PWB (without memory
trouble)
1) Remove the EEPROM from the defective PCU MAIN
PWB.
2) Install the EEPROM removed in the above procedure to
a new PCU MAIN PWB.
(Case 2) Works after replacing ICU MAIN PWB (without memory
trouble)
1) Remove the EEPROM from the defective ICU MAIN
PWB.
2) Install the EEPROM removed in the above procedure to
a new ICU MAIN PWB.
(Case 3) Work in case of memory trouble (U2)
Refer to the adjustment and setup values recorded before
occurrence of the trouble and reenter the adjustment and
setup values by simulations.
occurrence of the trouble and reenter the adjustment and
setup values by simulations.
The items which must be reentered are listed on the adjust-
ment and setup value list in the Service Manual.
ment and setup value list in the Service Manual.
(Note) Always record the adjustment and setup data for the use in
case of memory trouble (U2). SIM 22-6 allows to print the
most adjustment and setup data.
Since, however, this adjustment and setup value list printed
by the simulation does not include all the items, refer to the
adjustment and setup value list in the Service Manual in the
reentry procedure.
Also note that all the items cannot be entered with keys.
Some items require actual adjustment procedures for storing
the data.
most adjustment and setup data.
Since, however, this adjustment and setup value list printed
by the simulation does not include all the items, refer to the
adjustment and setup value list in the Service Manual in the
reentry procedure.
Also note that all the items cannot be entered with keys.
Some items require actual adjustment procedures for storing
the data.
Occurrence of memory trouble (U2-30) means destruction of the ma-
chine serial number data in the EEPROM on the PCU MAIN PWB
and the EEPROM on the ICU MAIN PWB.
chine serial number data in the EEPROM on the PCU MAIN PWB
and the EEPROM on the ICU MAIN PWB.
Therefore, the machine serial number must be entered both to the
EEPROM on the PCU MAIN PWB and to the EEPROM on the ICU
MAIN PWB.
EEPROM on the PCU MAIN PWB and to the EEPROM on the ICU
MAIN PWB.
Since, however, reentry of the machine serial number cannot be per-
formed with normal simulations. In this case, inquire of the local man-
ager for reentry of the machine serial number.
formed with normal simulations. In this case, inquire of the local man-
ager for reentry of the machine serial number.
EEPROM
PCU MAIN PWB
ICU MAIN PWB
EEPROM
14 – 18A
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