Sharp LC-52DH77E/RU/S, Руководство по обслуживанию

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LC
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52DH77E/RU/S
3 – 1
LC52DH77E
Service Manual
CHAPTER 3.
ADJUSTMENT PROCEDURE
[1] ADJUSTMENT PROCEDURE
1. Adjustment method after PWB and/or IC replacement due to repair
The unit is set to the optimum at the time of shipment from the factory. If any value should become improper or any adjustment is necessary due to
the part replacement, make an adjustment according to the following procedure.
1. Procure the following units in order to replace the main unit, IC3302.
NOTE: [Caution when replacing ICs in the main unit (IC501, IC1504, IC2002)]
The above ICs are EEPROMs storing the EDID data of PC, HDMI and Monitor microcomputer.
Before replacing the relevant part, procure the following parts in which the data have been rewritten.
2. After replacing the LCD panel or LCD control UNIT, check PANEL_SIZE in the following procedure.
1) Enter the process adjustment mode in AVC.
2) Use the cursor keys ( / ) and P keys ( / ) of R/C to select the item [PANEL_SIZE] on the page 16/16.
3) Verify that the panel size is displayed.
4) If the size doesn't match, select the values of the panel size with the VOL (+/-) keys.
5) After selection in Step 4), press the OK key, and it is completed with OK displayed.
3. After replacing the LCD panel or LCD control PWB, adjust the VCOM in the following procedure.
1) Enter the process adjustment mode.
2) Use the cursor keys ( / ) and P ( / ) of R/C to select the item [VCOM ADJ] on the page 10/16.
3) Press the OK key to verify that the adjustment pattern is displayed.
4) Use the +/- keys of VOL of R/C to adjust the flicker in the center of the screen to minimum.
5) When the optimal state is achieved in Step 4, press the OK key to turn the pattern to OFF.
2. Entering and exiting the adjustment process mode
1. Unplug the AC power cord of running TV set to force off the power.
2. While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power.
The letter “K” appears on the screen.
3. Next, hold down the “VOL (-)” and “P ( )” keys on the set at once.
Multiple lines of blue characters appearing on the screen indicate that the set is now in the adjustment Process mode.
If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.
4. To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off
with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
3. Remote controller key operation and description of display in adjustment process mode.
1. key operation
Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.
MAIN UNIT: DUNTKF190FM01
IC501 RH-iXC697WJQZS PC
IC2002 RH-iXC786WJN1Q Monitor microcomputer
CAUTION: Use due care in handling the information described here lest the users should know how to enter the adjustment process mode.
If the settings are tampered with in this mode, unrecoverable system damage may result.
Remote controller key Main unit key Function
P ( / ) P ( / )
Moving an item (line) by one (UP/DOWN)
VOL (+/-) VOL (+/-) Changing a selected item setting (+1/-1)
Cursor ( / )
— Turning a page (PREVIOUS/NEXT)
Cursor (</>) — Changing a selected line setting (+10/-10)
INPUT INPUT Input source switching (toggle switching) (TV
→
EXT1~8)
OK — Executing a function
RETURN — Returning to a present page