SHARP LC-22AA1H _ LC-22AA1M _ SERVICE MODE _ ADJUSTMENTS
PREPARATION FOR ADJUSTMENT
- Use the dedicated AC adaptor or stable DC power supply.
- AC adaptor: UADP-A066WJPZ(LC-22AA1M) UADP-A056WJPZ(LC-22AA1H/M(X))
- DC Power supply: 13V 7.0A.
- +B adjustment (adjustment at 5 V and 13V) ® Enter the adjustment processing mode.
- ® Counter-bias adjustment.® TAMP (contrast) adjustment. ® White balance adjustment at the TV input.
- 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)” and “ (–)” 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. (LC-22AA1M)
- To exit the adjustment process mode, press the "Power Off" or " Main Power Off" key. [LC-22AA1H]
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.
- The adjustment is preformed for each item with the cursor “ (UP) /(DN)” keys, cursor “ (LEFT)/(RIGHT)” keys, “ENTER” 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) / (RIGHT)” keys is pressed, the value of the selected item will be changed up or down.
If the item on the second page of the
first layer is not I2C DATA and the “ENTER” 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.
+B ADJUSTMENT [R3717]
- Receive the standard colour bar signal.
- Connect a digital voltage meter to TP3722.
- Adjust the voltage to 5.00V±0.02V using R3717 (trimming VR). Specified value: 5.00V±0.02V
+B ADJUSTMENT [R4525]
- Receive the standard colour bar signal.
- Connect a digital voltage meter to TP4531.
- Adjust the voltage to 13.00V±0.05V using R4525 (trimming VR). Specified value: 13.00V±0.05V
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.
Enter the service adjustment mode
- Select [G/A] on the second page of the adjustment process using the cursor “(DN)” key, and press the “ENTER” key. (The second layer item appears.)
- Next, press the cursor ”(DN)” key twice, to bring up the third page of the second layer.
- Select [G/A TEST PATTERN 1], on the third page.(In this case, the set value should be [0].)
- Press the cursor “(RIGHT.)” key repeatedly to set the value to [14].(In this case, [14] is [dot reverse flicker pattern 2].)
- Press the “RETURN” key and the cursor “(UP')” key to return to the first page of the adjustment process.
- Select [COM BIAS 50] on the first page, using the cursor “(UP)/(DN)” keys.
- Press the cursor “(LEFT)/(RIGHT)” keys repeatedly. Stop pressing it when the flicker on the screen is at the lowest level possible.
- Next, select the first page, [COM BIAS 60], using the cursor “(UP)/(DN)” keys.
Press the cursor “(LEFT)/(RIGHT)”
keys repeatedly. Stop pressing it when the flicker on the screen is at the
lowest level possible.
- Press the cursor “(DN)” key and the “OK” key again, and select [G/A TEST PATTERN 1], on the third page of the [G/A] second layer on the second page. Then, use the cursor “(LEFT)/(RIGHT)” keys to return the setting from [14] to [0].
- Press the “RETURN” key and the “(UP')/(DN)” keys to return to the first page of the adjustment process.
- To exit the adjustment process mode, press the “STANDBY-OFF” or “MAIN POWER-OFF” key. (LC-22AA1M)
To exit the adjustment process mode,
press the “POWER-OFF” or “MAIN POWER-OFF” key. (LC-22AA1H)
WHITE BALANCE ADJUSTMENT
- This adjusts the white balance at the TV input.
- This adjustment is performed when the LCD is replaced and the white balance must be set.
- Enter service mode as stated above
- Use the cursor “(UP)/(DN)” keys to bring up the second page. Select [FLI2310] using the cursor “(UP)/(DN)” keys, and then press the “ENTER” key.
- You can also press the cursor “(DN)” key to bring up the second page of the second layer.
- In this case, although the screen from the second page of [FLI2310] is brought up. make sure the CUT OFF settings for [R], [G], and [B] are [0] and the DRIVE settings for [R], [G], and [B] are [100]. If they are not [0] and [100], set them.
- Use the cursor “(LEFT)/(RIGHT)” key to set them to [0] and [100].
- Use the cursor “(UP)/(DN)” keys to bring up the second page. Select “FLI2310”, and then press the “ENTER” key.
- Press the cursor “(DN)” key to bring up the second page of the second layer.
- Adjust the chromatically of x and y for the six CUT OFF and DRIVE color items on the screen.
- Use the cursor “(RIGHT)/(LEFT.)” keys so that the values shown for White 80% and Gray 20% are the same as the values. In this case, each of the set values of R, G, and B is out of [0] or [100].
# The adjustment should be performed
after a 30-minute aging.
# The CUT OFF value should be adjusted
within the range of ±0 ~
25. The DRIVE value should be adjusted
within the range of ±0 ~
25.
- To exit the adjustment process mode, press the “STANDBY-OFF” or “MAIN POWER-OFF” key. (LC-22AA1M)
- To exit the adjustment process mode, press the “POWER-OFF” or “MAIN POWER-OFF” key. (LC-22AA1H)
