Read Sharp LC-20C2E (serv.man3) Service Manual online
9
LC-20C2E
ADJUSTING PROCEDURE OF EACH SECTION
PREPARATIONS
To supply power, use a dedicated AC adaptor or a stable DC power supply.
AC adaptor
: UADP-0219CEZZ
DC power supply : 13 V, 3.8 A
[1] Per-adjustment steps
1-1. Adjusting the checker
Turning on the power (initialization)
➝
Setting the size in inches
➝
Transferring the model-specified data to the
E
2
PROM (I
2
C)
➝
Calling the adjustment process mode
➝
Starting the adjustment (+B)
1-2. Adjusting the finish process
Reassembling the set
➝
Turning on the power
* MAIN adjustment
Calling the adjustment process mode (using the remote controller)
➝
Adjusting the counter
bias and white balance
* TUNER adjustment
Calling the TUNER adjustment process mode:
Pressing the MENU key on the set
Pressing the MENU key on the set
➝
Pressing the CH UP key on the remote controller
➝
Pressing the M key
on the remote controller within 1 second
➝
The adjustment process comes on.
Press the CURSOR DOWN key 4 times, select “other adjustments” and press the OK key.
To adjust the AGC gain start, receive the E-12CH signal, select “other adjustments” and pick up the AGC gain
start.
To adjust the AGC gain start, receive the E-12CH signal, select “other adjustments” and pick up the AGC gain
start.
[2] Calling the MAIN adjustment process mode
There are the following two ways to choose from.
* Turn on the power and press the “ADJUST PROCESS” key on the remote controller.
* Set KEY 4 and KEY 5, pins (81) and (82), respectively, on the microprocessor) to the “L” level. Now turn on the
* Turn on the power and press the “ADJUST PROCESS” key on the remote controller.
* Set KEY 4 and KEY 5, pins (81) and (82), respectively, on the microprocessor) to the “L” level. Now turn on the
power.
[3] Using the keys for the adjustment process
Selecting adjustment items and adjusting their settings
* Select an item with the MENU button (M key), and adjust its setting with the VOL+/- button. (The MENU button
* Select an item with the MENU button (M key), and adjust its setting with the VOL+/- button. (The MENU button
allows the toggle action of a selected item. Settings modified with the VOL+/- buttons will be saved automatically.)
Setting the LCD controller register (on pages 3 and 4)
* Let’s imagine that the NTSC/PAL is selected on pages 3 and 4 of the adjustment process mode. In this case,
pressing the VOL+/- buttons will call the register select mode and move the cursor to the register setting
address “01”. In this state, the CH SELECT
address “01”. In this state, the CH SELECT
]
/
[
buttons allows the vertical scroll of register setting addresses,
whereas the VOL+/- buttons allows the horizontal scroll of these addresses. (The codes in the left-hand half of
pages 3 and 4 of the adjustment process mode show the addresses.) The register setting addresses can be
entered using the button 12 on the remote controller. Once one of the addresses has been entered, the cursor
moves to its corresponding data (the code in the right-hand half on page 9 of the adjustment process mode).
(This means that this data corresponds to the address in the left-hand half.) To modify the data, use the VOL+/
- buttons, and to save the modification, use the button 12 on the remote controller. With the data now saved,
the cursor returns to the register setting address.
pages 3 and 4 of the adjustment process mode show the addresses.) The register setting addresses can be
entered using the button 12 on the remote controller. Once one of the addresses has been entered, the cursor
moves to its corresponding data (the code in the right-hand half on page 9 of the adjustment process mode).
(This means that this data corresponds to the address in the left-hand half.) To modify the data, use the VOL+/
- buttons, and to save the modification, use the button 12 on the remote controller. With the data now saved,
the cursor returns to the register setting address.
Other key-activated settings
* The direct channel select buttons are used to select reception channels.
* The TV/VIDEO button toggles the TV and VIDEO inputs.
* The TV/VIDEO button toggles the TV and VIDEO inputs.
The toggle action is as follows: TV
➝
AV1
➝
AV2
➝
AVS
➝
TV.
* When the auto preset button on the remote controller is pressed in the adjustment process mode, the item on
the top of the next page is reached. The pages start 1 thru 6, and back to 1.
* When the manual memory button on the remote controller is pressed in the adjustment process mode, the item
on the top of the current page is reached.
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