Sharp LC-70UD1U, Service Manual

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LC-70UD1U
5 – 11
6. Special features
* STANDBY CAUSE (Page 1/29)
Display of a cause (code) of the last standby
The cause of the last standby is recorded in EEPROM whenever possible.
Checking this code will be useful in finding a problem when you repair the troubled set.
* EEP SAVE (Page 29/29)
Storage of EEP adjustment value
* EEP RECOVER (Page 29/29)
Retrieval of EEP adjustment value from storage area
7. Writing the microprocessor software
7.1. Writing the main microprocessor software and monitor microprocessor software
(Main PWB: QPWBXG317WJN1)
8. Signal adjustment
8.1. LCD section adjustment [LCD module adjustment]
8.2. Image adjustment
8.2.1 Device check
Before adjustment, check that the adjustment jig and signal source are set for Sharp LCD US.
Signal generator level adjustment check (Adjust to the standard value level.)
Adjustment item Adjustment conditions Adjustment procedure
1 Writing the main micropro-
cessor software and moni-
tor microprocessor software
<Main PWB> Checker process
Checking the file version
Checking the USB memory
1) Using the checker, connect the specified writing tool to the SC3101 (TL3114 -
TL3128).
2) Using the checker, connect the USB memory to the J9502 (TL9524 - 9527).
3) Apply the specified voltage to the PWB and boot it up with the tool connected.
4) Send the software writing start command via RS232C.
5) Send the writing status check command and confirm the response of OK. Then
turn off the power.
CAUTION: When the USB memory is not inserted or reading error occurs, nothing
is written.
Adjustment item Adjustment conditions Adjustment procedure
1 Opposite bias adjustment
(LCD module adjustment
item) Adjustment in the center
position of the panel 1) Enter the process mode using the process adjustment remote control.
2) Select [VCOM ADJ] using the Channel
/ keys on the remote control.
3) Press the Enter key to check that the pattern for adjustment is displayed.
4) Make adjustment so that the flicker located in the center of the screen is mini-
mized using the /- keys on the remote control.
5) If the optimum condition is obtained in step 4, press the Enter key to turn off the
pattern.
CAUTION: * Make adjustment with no ANT signal (since the brightness is changed
by the active backlight).
[Adjustment position]
•
Composite signal: 0.714Vp-p
±
0.02Vp-p (Pedestal to white)
•
33K component signal: Y level: 0.7Vp-p
±
0.02Vp-p (Pedestal to white)
PB/PR level: 0.7Vp-p
±
0.02Vp-p
•
Analog RGB: RGB level: 0.7Vp-p
±
0.02Vp-p (Pedestal to white)
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