Sharp LC-12A2E, Service Manual

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LC-12A2E
8
ADJUSTING PROCEDURE OF EACH SECTION
Preparation for Adjustments
Use the dedicated AC adapter or stable DC power supply.
AC adapter: UADP-0210CEZZ
DC power supply: 12 (V), 3.2 (A)
[1] Adjusting procedure
1-1. Checker adjustment
Power ON (initialization)
→
Setting of model and inch size
→
Model data transfer to the setting E 2 PROM (I 2 C)
→
Adjustment processing mode
→
Adjustment (+B adjustment, 38.9-VCO adjustment, 33.9-L’-VCO adjustment,
RF-AGC cut-in adjustment)
1-2. Finish processing adjustment
Setup
→
Power ON
→
Adjustment processing mode (Remote control)
→
Opposed bias, TV contrast and white
balance adjustments
[2] Entering the adjustment processing mode
• Setting the 81 pin (KEY4) or 82 pin (KEY5) of IC2001 (microcomputer) to “L”, turn on the power.
[3] Key operation in the adjustment processing
Selection of the receiving channel
• The receiving channel UP/DOWN is performed with the tuning UP/DOWN key.
One push ... The UP/DOWN tuning is performed per channel.
Continuous push ... The UP/DOWN search is performed until a next receivable station is found.
• Various adjustments
The adjustment is performed for each item by the menu select, tuning UP/DOWN or volume UP/DOWN key (main
body and remote control).
• The adjustment item makes a toggle operation with the menu select key input. (Next item)
If the menu select key is input while the bottom item is selected, it moves to the top item on the next page.
• The adjustment item makes a toggle operation with the video select key input.
(Previous item) If the video select key is input while the top item is selected, it moves to the bottom item on the
previous page.
• If the auto preset key is input while an item is selected, it moves to the top item on the next page.
Page 1
→
Page 2
→
...
→
Page 15
→
Page 1
• If the manual memory key is input while an item is selected, it moves to the top item on that page. UP/DOWN of each
adjustment vale selected is performed with the volume UP/DOWN key input.
• For P14 – 15, the unit enters the register select mode with the volume UP/DOWN key input while PAL/NTSC is
selected, and the cursor moves to the address 01.
• The cursor moves up or down with the tuning UP/DOWN key and moves left or right with the volume UP/DOWN key,
and a decision is made with the 12 key.
When the decision is made, the cursor moves to the adjustment value selected, and UP/DOWN of each adjustment
value selected by the volume UP/DOWN key input is performed.
Decide with the 12 key and return to the address select. Move to the next item with the menu select key.
During address select, the cursor movement by the volume UP/DOWN key input is as follows:
Example: 01
↔
02
↔
03
↔
01
↔
...
The cursor movement by the tuning UP/DOWN key input is as follows:
Example: 02
↔
05
↔
...
↔
F6
↔
02
↔
...