Section 1 Servicing Notes - Sony PRS-350 Service Manual

PRS-350
NOTE OF REPLACING BATTERY ASSY (BAT1)
Exchange it for an absolutely new part when you remove the BAT-
TERY ASSY (BAT1) built into this set.
NOTE THE EACH BOARDS REPAIRING
The mount parts on each boards installed in this set cannot ex-
change with single. When the each boards are damaged, exchange
the entire mounted board.
DISCRIMINATION OF THE INK INDICATOR 5inch ELE-
MENT
Two kinds of the INK INDICATOR 5inch ELEMENT is used in
this set (LG type or PVI type).
Parts are different according to the difference of the INK INDICA-
TOR 5inch ELEMENT.
Confi rm the shape of the Flexible Printed Cable of the INK IN-
DICATOR 5inch ELEMENT when the INK INDICATOR 5inch
ELEMENT of PRS-350 that repairs distinguishes which type.
• LG type
• PVI type
NOTE OF REPLACING THE COMPLETE MAIN BOARD
OR CHASSIS ASSY
Please do the following work when you exchange complete MAIN
board or CHASSIS ASSY.
Note: INK INDICATOR 5inch ELEMENT is included in CHASSIS
ASSY.
• Write VCOM: Refer to "20. Write VCOM" on page 10.
• REWRITING THE LUT: Refer to this page.
REWRITING THE LUT
As for INK INDICATOR 5inch ELEMENT, the parameter that re-
writes the screen of each lot number is different. This parameter is
called LUT (Look Up Table).
When replacing the complete MAIN board or CHASSIS ASSY
(LG) (including INK INDICATOR 5inch ELEMENT) you need
to rewrite the LUT.
However, rewriting is not required if the lot number is the same.
Note: LUT is written in IC2003 on the MAIN board.
Refer to the following for the "How to enter the test mode" and
"How to change the LUT".
• How to enter the test mode
1. Connect the set to PC by the USB cable.
2. The fi le for the test mode is copied under the "READER"
drive.
Note: Confi rm the method of obtaining the fi le for test mode to each ser-
vice headquarters.
3. Remove the set from PC. Then, the power supply automati-
cally becomes on.
2
SECTION 1
SERVICING NOTES
4. Confi rm "Test Mode Avaliable" is displayed on the screen.
5. Press the key as following order.
[ ] → [ ] → [ ] → [ ]
6. After a while, indicate the test mode menu, enter the test mode.
• Releasing the test mode
Slide the [POWER] key for 5 seconds or more to turn the power
off. Then, delete the fi le copied in "How to enter the test mode"
from the "READER" drive.
• How to change the LUT
1. Confi rm the lot number of INK INDICATOR 5inch ELE-
MENT referring to the fi gure below.
Note: Remove the MAIN board to confi rm the lot number.
L -1.58 E505
2. Confi rm the version and the LUT fi le of LUT corresponding to
the lot number to each service headquarters.
3. Make the following folder under the "READER" drive.
/Sony Reader/software/data/
4. Copy the LUT fi le updated under the folder made in step 3, and
change the fi le name to "lut.bin".
5. The current LUT version displayed at the lower side of "Up-
date Waveform" on test mode menu 1
(Example: "000003020605000218031B321B00" in the fi gure
below).
(Example of displaying current LUT version)
6. Touch the "Update Waveform" in the test mode menu page 1,
it starts rewriting LUT version.
7. After about 10 seconds, screen changes into all white.
8. Press [RESET] key and reboot the set.
9. Enter the test mode again, and confi rm LUT version has been
updated.
lot number