TCL - NX56LA CHASIS TVS - HOW TO ENTER SERVICE MODE - SCHEMATIC DIAGRAM - NCP1337 [POWER CONTROL] – SK2996 [FET POWER SWITCHING] – STV8172A [VERT-OUTPUT] – 63MPF [FET-HORIZONTAL OUTPUT TRANSISTOR] -

TCL - NX56LA CHASIS TVs - HOW TO ENTER SERVICE MODE - Schematic Diagram - NCP1337 [Power Control] – SK2996 [FET Power Switching] – STV8172A [Vert-output] – 63MPF [FET-Horizontal Output Transistor] -

TO ENTER SERVICE MODE

Method one

• Switch on the TV set.
• Press the “MENU” key on RC to show the “PICTURE” OSD menu.
• Move the cursor to “Contrast” item then press the “9”, “7”, “3”, “5” key continuously on RC within 3 seconds then enter P-Mode. The “P” letter will appear on the left low corner of the screen when enter P-Mode. Also the “FACTORY HOTKEY” will be set to “ON ( = 1 )”.

Another method

• Press the “RECALL” key on RC to enter P-mode directly.

Notes:

1. This will be active only when the “FACTORY HOTKEY” had set to “ON ( = 1 )”.
2. When the power on with “FACTORY HOTKEY” had set to “ON ( = 1 )”, the set will enter the P-Mode automatically.

To Exit the P-Mode:   Press the “RECALL” or “MENU” key on RC to exit the P-Mode.

Keys’ function on RC at the P-Mode

Use the RC to navigate in P-Mode:

• Press“0” to “9”key to select factory adjustment page.
• Press“▲▼” key to select option.
• Press“►◄” key to adjust or select option.
• Press“DISPLAY” key to display software version.
• Press “MENU”key to exit the P-Mode.
• Press “RECALL”key to enter or exit the P-Mode.

All change in P-Mode will be saved in EEPROM automatically.

Producing parameter setup and option

Enter P-Mode, press key “4” to select page “4”.Set the corresponding item to require value.

AUTO OFFSET and GET OFFSET

The “GET OFFSET” can use to make the EEPROM copy by PE engineer.

When the PAL and NTSC geometry adjustment had finished, trigger the “GET OFFSET” from “0” to “1” to store the geometry offset datum between PAL and NTSC in EEPROM.

On producing, these geometry offset datum can use to easy the NTSC geometry adjustment. When finished the PAL geometry adjustment, trigger the “AUTO OFFSET” from “0” to “1”, then the geometry adjustment of NTSC signal will finish automated. If now the geometry of NTSC signal is look good, it not needed to adjust the geometry of NTSC signal any more.

Enter P-Mode, press key “6” to select page “6”. Set the corresponding item to require value.

HORIZONTAL & VERTICAL OUTPUT STAGE - SCHEMATIC

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POWER SUPPLY [SMPS] SCHEMATIC