LC-20B5E (serv.man16) - Sharp TV Service Manual (repair manual). Page 13

The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust
as follows.

Use the exclusive-use AC adapter or stable DC power supply.

LC-20B5E/E(K)/E(F) AC adapter: UADP-A063WJPZ

DC power supply: 12 (V) 5.6 (A)

Power on 

→

 Adjust process mode (bus connector) 

→

 Adjustments of common bias, TV contrast and white balance

Turn on the power while keeping either KEY4 (pin (81) of the microprocessor) or KEY5 (pin (82) of the
microprocessor) at "L".

3-1. Basic operation
• Tune in with the CH UP/DOWN keys or the direct channel select key.
• Select an item to be adjusted with the cursor UP/DOWN keys.

(When the cursor DOWN key is pushed at the bottom, it moves to the top on the next page, and when the cursor
UP key is pushed at the top, it moves to the bottom on the previous page.)

• Adjust the selected item with the VOL UP/DOWN keys or the cursor LEFT/RIGHT keys.
• When the menu key is pushed, the next item appears. (When the key is pushed at the bottom, the top on the next

page appears.)

• When the manual memory key is pushed, the top item reappears. (When the key is pushed at the top, the top

on the previous page appears.)

• When the auto preset key is pushed, the top on the next page appears.
3-2. Moving through the layers
• On the third page, when the ENTER key is pushed at any item other than I

2

C DATA, the setting page of the item

appears.

• To quit the setting page, push the previous-page key.
3-3. Adjusting the address display items
• At the items OSD COLOR, NTSC and CARD on the G/A page, or at the item EDGE ENHANCEMENT on the

S2300 page, when the VOL UP/DOWN keys or the cursor RIGHT/LEFT keys are pushed, the register select mode
appears. (The cursor moves to the first address.)

• In the register select mode, the cursor moves up and down with the CH UP/DOWN keys, and moves left and right

with the VOL UP/DOWN keys or the cursor LEFT/RIGHT keys. Select an address to be adjusted and push the
direct channel select key "12". This procedure moves the cursor to the right-side value for the address. Adjust
the setting with the VOL UP/DOWN keys or the cursor LEFT/RIGHT keys. Push the direct channel select key "12"
with the cursor at the right-side value, and the register select mode appears again. Pushing the cursor UP/DOWN
keys, the menu key or the like leads to the other item.

4-1. Initialize the product when IC2005 (E

2

PROM) or IC2001 (microprocessor) has been replaced.

4-2. Bring pins (81) and (82) of IC2001 (microprocessor) to GND, and then turn on the power.
4-3. Power on (Initialization) 

→

 Setting the model and the screen size (inches) 

→

 Transmitting the data for the

model to the setting E

2

PROM (I

2

C)

4-4. Check the model. (A664) *Note: The model number cannot be changed.
4-5. Select the screen size (inches) (20).
4-6. Send the transmitting data (E

2

PROM-written data for the microprocessor) for the model.