Sony PRS-505, Service Manual

Page: 11 / 74

PRS-505
PRS-505
11 11
SECTION 4
TEST MODE
HOW TO MAKE THE SD MEMORY CARD OR
MEMORY STICK FOR TEST MODE USE ONLY
1. Ready for the SD memory card or memory stick.
2. Make the new directly as “/Sony Reader/software” on the SD
memory card or memory stick.
3. Download the as follow as the
fi
les from internet site, copy to
directly.
Download
fi
les:
autorun.xml,
icon.png,
key.png,
lut.bin (If this download
fi
le’s name is different, change
to this name.)
HOW TO ENTER THE TEST MODE
1. Insert the test mode SD memory card or memory stick.
2. After a while, indicate the test mode menu, enter the test
mode.
1. Test Panel
1. While the machine selected tab “Test Panel” in test mode
menu, press the [ENTER] button or [1] button.
2. Screen is changed to the Test Panel.
3. The display is changed so bellow with each time of pushing the
[>] button or [<] button of [PAGE].
WHITE LIGHT GRAY DARK GRAY BLACK
>
<
> >
<
>
< <
4. It’s back to TEST MODE MENU when the [MENU] button.
5. After the end of test, a display of Test Panel on TEST MODE
MENU is changed to “Done” from “Not Yet”.
2. Check All Key
1. In the state that a Check All Key tab of TEST MODE MENU
is selected, press the [ENTER] button or [2] button.
2. The screen is switched into the Check All Key state.
1 2 3 4 5 6 7 8 9 0
UP
ENTER
DOWN
LEFT RIGHT
MENU MARK
SIZE
VOL-
VOL+
PREV
NEXT
NEXT
PREV
3. The display invert when each button is pushed, and the display
is back to the all button.
4. After the end of test, a display of the right side of Test Panel on
TEST MODE MENU is changed to “Done” from “Not Yet”.
3. Update Waveform
In this mode, it is possible to con
fi
rm the variation of LUT (Look
Up Table) and rewrite. The change of the LUT is required when a
INK INDICATOR ELEMENT, MAIN BOARD and FLASH ROM
(IC1203) are replaced. However, a INK INDICATOR ELEMENT
is different from parameter by each lot number, therefore, rewrit-
ing is not required if the lot number is the same. The lot number is
written on the label on the
fl
exible board.
lot number
1. The current LUT version displayed at the right side of Update
Waveform on TEST MODE MENU.
2. In the state that a Update Waveform tab is selected if it is press
the [ENTER] button or [3] button, it starts rewriting LUT ver-
sion.
Note: It is necessary to match the LUT version to the version in elation
to the lot number of the INK INDICATOR ELEMENT. Refer to
Technical News about details.
3. After a few minutes (about 10 seconds), the screen display is
refreshed, a LUT version display of the right side of Update
Waveform on TEST MODE MENU is refreshed.
4. Reset Screen Lock
The screen lock can be compulsorily released.
1. The current state of screen lock and the password are dis-
played on the right side of Reset Screen Lock of TEST MODE
MENU.
2. In the state that the Reset Screen Lock tab of TEST MODE
MENU is selected, press the [ENTER] button or [4] button.
3. The display on the right side of Reset Screen Lock is changed
to “Off-0000”, so Screen Lock is unlocked .
5. Power Off
1. In the state of a Power Off tab of TEST MODE MENU, press
the [ENTER] button or [5] button.
2. After a while, the screen display is changed white, so power is
turned off.
6. Factory Initialize
It return to the state various setting are shipped in the factory. The
fi
le of Flash ROM deletes all
fi
les except
fi
le the factory is shipped.
Please note it enough you operate this mode.
1. In the state of a Factory Initialize tab of TEST MODE MENU,
press the [ENTER] button or [6] button.
2. Initialize end. After a while, the screen display is changed
white, so power is turned off.
SECTION 5
ELECTRICAL ADJUSTMENT
VCOM VOLTAGE ADJUSTMENT
Vcom voltage for the display panel varies for each panel. VCOM
adjustment is required when replacing a board or panel.
Preparation:
Voltage is generated only when the screen is changed, so the
adjustment needs to be performed while changing the screen. Use
the slideshow function to change the screen sequentially.
1. With the “Settings” tab in the menu selected, press the [EN-
TER] button or the [0] button.
2. With the “Slideshow” tab selected, press the [ENTER] button
or the [3] button.
3. Set “Turn On, Slide Duration 05 seconds”, and press the [EN-
TER] button on OK.
Procedure:
1. With the “Pictures” tab in the menu selected, press the [EN-
TER] button or the [9] button.
2. Specify a desired screen, and press the [ENTER] button to
check that the slideshow starts.
3. Observe the TP354 on an oscilloscope (refer to Fig.2), and use
RV1801 to adjust the voltage that is generated when the screen
is changed so that it satis
fi
es the standard.
Standard: Written on the
fl
exible card wire of the display panel with
a marker. (–1 V to –2.5 V) (Refer to following Fig.1)
(In case of Fig.1: The value of VCOM is –1.16 V.)
Fig. 1
500 mV/DIV, 200 ms/DIV
1 Vp-p
660 ms
Fig. 2
Adjustment Location:
– MAIN Board (Component Side) –
TP354
RV1801
IC301