Servicing Notes - Sony PRS-950 Service Manual

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.
NOTE OF REPLACING THE COMPLETE MAIN BOARD
OR MAIN BLOCK ASSY
Please do the following work when you exchange COMPLETE
MAIN board or MAIN BLOCK ASSY.
Note: INK INDICATOR 7inch ELEMENT is included in MAIN BLOCK
ASSY.
• Write VCOM: Refer to "20. Write VCOM" on page 14.
• REWRITING THE LUT: Refer to this page.
REWRITING THE LUT
As for INK INDICATOR 7inch 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 MAIN BLOCK
ASSY (including INK INDICATOR 7inch 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.
4. Confi rm "Test Mode Available" 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.
SECTION 1

SERVICING NOTES

• How to change the LUT
1. Confi rm the lot number of INK INDICATOR 7inch ELE-
MENT referring to the fi gure below.
Note: The lot number disappears when the MAIN board is assembled.
Record the lot number in the memo etc. before assembling the
MAIN board.
-1.68 E505
lot number
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.
Wi-Fi OPERATION CHECK
•
MAIN board is replaced.
•
WWAN ANTENNA is replaced.
•
Cable of WWAN ANTENNA is removed.
In the above-mentioned case, confi rm the Wi-Fi operation refer-
ring to the following.
Procedure:
1. Slide the [WIRELESS] switch to ON.
2. Touch in order of "Settings" → "Wi-Fi Network Settings" →
"Refresh Network List".
3. Confi rm the Wi-Fi access point is displayed.
PRS-950
MAIN BLOCK ASSY
3