SHARP LC-26SB25E SERVICE MODE AND POWER SUPPLY CIRCUIT

SHARP LC-26SB25E SERVICE MODE AND POWER SUPPLY CIRCUIT

 SERVICE MODE
Enter factory mode menu: press MENU + Numeric keys “062596” + MENU key (FAC mode menu).Then select “Factory” item.

Picture check
WHITE-D adjustment
General set-up :
Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer Chroma 2250 or equivalent PC signal generator input requirements:
Input Signal Type : PC VGA signal
1024X768/60Hz PC mode with ”5 white block” pattern
Input Signal Strength : 0.7 Vp-p linear voltage.
Input Injection Point : PC D-SUB input

Alignment method:
Initial Set-up:
1>. Select source as “PC”.
2>. Set Contrast = 50 (CMO) and Brightness=50 (CMO) , at normal menu mode.
3>. Apply “5 white block” pattern by VGA pattern generator.
4>. Enter factory mode menu: press MENU + Numeric keys “062596” + MENU key (FAC mode menu). Then select “Factory” item.
Alignment:
1>. At FAC mode menu, select AUTO_COLOR item. Then press “OK” key to adjust ADC_GAIN_R, ADC_GAIN_G, ADC_GAIN_B and ADC_OFFSET_R, ADC_OFFSET_G, ADC_OFFSET_B. Then store those values to NVM.
2>. Apply Flat80 pattern (80% white pattern).
3>. Set color temperature to “NORMAL”.
4>. At FAC mode menu, adjust the CLR TEMP R, CLR TEMP G, CLR TEMP B values to meet “NORMAL” color coordinates specification below. Then store those values to NVM
5>. Set color temperature to “COOL”.
6>. At FAC mode menu, adjust the CLR TEMP R, CLR TEMP G, CLR TEMP B values to meet “COOL” color coordinates specification below. Then store those values to NVM
7>. Set color temperature to “WARM”.
8>. At FAC mode menu, adjust the CLR TEMP R, CLR TEMP G, CLR TEMP B values to meet “WARM” color coordinates specification below. Then store those values to NVM.

Note:
1>. Use Minolta CA-110 for color coordinates and luminance check.
2>. Luminance > 400 cd/m2 in the center of the screen when Brightness control at 100; Contrast control at 100 for CMO 26”, 32”, 42” panels.

YPbPr Mode display adjustment
White balance adjustment
General set-up :
Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer. Quantum Data Pattern Generator 802G , 802BT or equivalent instrument Input requirements:
Input Signal Type : YPbPr signal
1>. 720P mode, TVBar100 pattern by 802G or 802BT.
2>. Select Picture mode to User mode and check the x, y data. Input Signal Strength : 1 Vpp for Y signal ; 700 mVpp for Pb & Pr signal Input Injection Point : YPbPr (RAC jack)

Alignment method:
Initial Set-up:
1>. Select source as “YPbPr”.
2>. Set Picture mode as “User” and to be Contrast =50 (CMO), Brightness=50 (CMO) , at normal menu mode.
3>. Apply “TVBar100” pattern with color bar pattern by signal generator.
4>. Enter factory mode menu: press MENU + Numeric keys “062596” + MENU key (FAC mode menu).Then select “Factory” item.
Alignment:
1>. At FAC mode menu, select AUTO_COLOR item. Then press “OK” key to adjust ADC_GAIN_R, ADC_GAIN_G, ADC_GAIN_B and ADC_OFFSET_R, ADC_OFFSET_G, ADC_OFFSET_B. Then store those values to NVM.
2>. Check the 16 grayscale pattern should be distinguished and color bar is correct
3>. Reset AV setting, picture mode shall be recalled to be “Vivid” and Contrast=48, Brightness=58.

HDMI HDCP Key Download
1>. HDCP Key Encryption
The handling of HDCP keys must be done in the most secure way. The HDCP keys purchased / delivered from Digital Content Protection, LLC are first
encrypted by MTK encryption software. Then the encrypted keys are stored in secure room or secure PC in production line.
2>. HDCP Key Downloading to Set
In production line PC, execute HDCP key programming software to load encrypted key data from secure room or secure PC to specific positions of set’s NVM via UART interface of MT533x chip.
3>. Test HDCP Key
Use QuantumData 802BT or equivalent instrument with HDCP test pattern to verify HDCP key loaded in the set. The “PASS” information will be shown in the lower center block of the screen when HDCP key is correctly loaded. Use DVD player Pioneer DVD player or equivalent DVD player with HDMI output to verify HDCP key loaded in the set. The video should be smoothly displayed when HDCP key is correctly loaded.

 Preset NVM data

NVM (U301) data has to be preset data according following table.
• NVM file name description:
1>. SHARP (customer name)
2>. xxSByy (Model name, xx : screen size; yy : 25 for 26” and 32”, 55 for 42”)
3>. EUR (area)
4>. 24C16 (EEPROM type)
5>. CMOxx (Panel type and size)
6>. Vx.xx_xxxxxxxx (NVM version no. and finalize testing Date yyyymmdd)
7>. xxxx(checksum / 2bytes) for CMOxx inch panel.

POWER SUPPLY CIRCUIT

CLICK ON THE IMAGE TO ZOOM IN