SHARP LC22AD 1E _ LCD TV_ENTERING THE ADJUSTMENT PROCESS MODE

HOW TO ENTER SERVICE MODE - LAMP TIME RESET -  SHARP LC22AD - LCD TV

TO ENTER ADJUSTMENT MODE

• During after-sales service, the “MAIN POWER” key is turned on while pushing the “TV/VIDEO” and “MENU” keys at the same time. (“K”, indicating the inspection processing mode, will be displayed at the upper left of the screen.)
• Next, “CH DN” Key and “VOL (–)” keys are pushed at the same time. (The adjustment process mode screen will be brought up.) To exit the adjustment process mode, press the “STANDBY-OFF” or “MAIN POWER-OFF” key.

KEY OPERATIONS IN THE ADJUSTMENT MODE

Receiving channel selection

• The receiving channel UP/DOWN is performed with the “CH UP/DN” keys.
• One push - The UP/DOWN is performed per channel.
• Continuous push - The UP/DOWN search is performed until a next receivable station is found.
• Direct channel selection using the 0 - 9 and 100 keys.

Various adjustments

• The adjustment is preformed for each item with the cursor “ UP/DN” keys, cursor “ LEFT / RIGHT” keys, “OK” key and “RETURN” key (LCD TV set or remote control).
• The adjustment item makes a toggle operation with the “DN” key input. (Next item)
• If the “DN” key is input while the bottom item is selected, it moves to the top item on the next page.
• When the cursor “UP” key is pressed, the item selected will move up to the previous item.
• When the “ VOL +/-” keys or the cursor “LEFT/ROGHT” keys is pressed, the value of the selected item will be changed up or down.

Item selection

• If the item on the second page of the first layer is not I2C DATA and the “OK” key (the cursor “LEFT/RIGHT” keys or the “VOL +/-” keys can also be used) is pressed, the top of each first page of the second layer will appear.
• To return from the second layer to the first layer, press the “RETURN” key.

Counter-bias adjustment

• This adjustment minimizes the flicker on the screen.
• To set the COM BIAS shown on the first page of the adjustment process, perform this adjustment at 50 Hz and 60 Hz, respectively.

LAMP ERROR DETECTION

This LCD colour television has a function (lamp error detection) that turns off the power automatically, for safety, if a problem occurs with a lamp or a lamp circuit.

If there is a problem with a lamp or a lamp circuit or if a lamp error is detected for some other cause, the following will occur.

1. The power is turned off about 15 seconds after the power to the TV is turned on. (The power LED on the front of the TV will be changed from green to red, and it will flash three times repeatedly.)
2. If the protective function described in (1) is repeatedly activated five consecutive times, you will not be able to turn on the power. (The red power LED will flash three times, repeatedly.).

COUNTERMEASURES

• Confirmation after the lamp error detection is deactivated

When the power is turned off due to the lamp error detection function as described above, turn off the [power] while the power LED is red. Then, when the “TV/VIDEO” key and the “MENU” key are held down and the “MAIN POWER“ key is pressed, the [inspection process] mode will be entered and “K” will be displayed. Next, press the “VOL -ve” key and the “DN” key at the same time to enter the [adjustment mode].

Then, you can check the operation to see if the lamp and lamp circuit are abnormal.

See if [ERROR NO RESET] in the first page of the adjustment is set to 1 or more.  If it is 1 or more, it means that a lamp error has been detected.

RESETTING THE LAMP ERROR COUNT

After you have finished checking whether the lamp and lamp circuit are abnormal, reset the lamp error count.

Select [ERROR NO RESET] in the first page of the adjustment process, and reset it to [0] using the cursor “LEFT/RIGHT” keys.