Read Sharp PN-U423 (serv.man2) Service Manual online
PN-U533/U473/U423 IMPORTANT INFORMATION FOR SERVICING THE DISPLAY 3-1
CHAPTER 3. IMPORTANT INFORMATION FOR SERVICING THE DISPLAY
1. I/F PWB, LCD MODULE, PARTS REPLACEMENT PROCEDURES
The following information as well as user setting information are saved to the
EEPROM (IC1101)
controlled by main firmware
and
EEPROM(IC1101)
controlled by LAN micon firmware.
<INFORMATION STORED IN THE EEPROM’S
(IC1101)
CONTROLLED BY THE MAIN FIRMWARE.>
・MODEL NAME
・SERIAL NUMBER
・USAGE TIME*1
・WHITE BALANCE SETTING VALUE*１
・CALIBRATION SETTING VALUE
・SYSTEM LOG
*1 This information is linked with the LCD module.
Therefore, when the I/F PWB or the LCD module is replaced, initialization and setting must be performed according to necessity. In
addition, after completion of the work, perform “ALL RESET”.
1-1. INFORMATION ITEMS
MODEL NAME
The machine has model name which is described on the nameplate at the back of the machine.
SERIAL NUMBER
The machine has its own serial number which is described on the nameplate at the back of the machine.
→Refer to “6-3.SERIAL NUMBER SETTING FUNCTION”
→Refer to “12.SERIAL NUMBER WRITING PROCEDURES
USAGE TIME
This information is linked with the LCD module. When replacing the I/F PWB, read the information before
replacement, and write it to the new I/F PWB after replacement. It is necessary to initialize this setting when
the LCD module is replaced.
→Refer to “6-4. USAGE TIME SETTING FUNCTION
→Refer to “13. USAGE TIME SETTING PROCEDURE”
WHITE BALANCE
SETTING VALUE
This information is linked with the LCD module. When replacing the I/F PWB, read the information before
replacement, and write it to the new I/F PWB after replacement. Execute resetting when the LCD module is
replaced.
→Refer to “8. WHITE BALANCE SETTING PROCEDURE BY OSD”
CALIBRATION
SETTING VALUE
Since a service part I/F PWB has been adjusted, there is no need to set when replacing the I/F PWB.
Setting may be required depending on the replaced part.
→Refer to “3. CALIBRATION”
SYSTEM LOG
INFORMATION
This information is included in user operation and system information.
→Refer to “ 15.OPERATING MANUAL OF THE LOG TOOL“
MAC ADDRESS
The MAC address is the unique ID number assigned to the I/F PWB for LAN communication.
The unique ID number is written into the I/F PWB (service part).
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