Haier HL24XD2 – Service mode, adjustments, SMPS- 715G3754P01W30003H and audio amplifier schematic

Haier HL24XD2 23.6″ LCD TV Horizontal Frequency 31~68 KHz - Power Board 715G3754P01W30003H, Backlight inverter,  audio amplifier schematics, service mode and adjustments, parental lock and more

Supported scan rate: 640x480@60/72/75Hz,720x400@70Hz,
800x600@56/60/72/75Hz,1024x768@60/70/75Hz,
1280x720@60Hz,1280x768@60Hz
1360x768@60Hz:For HL19D2 / HL32D2 only.
1280x1024@60Hz,1440x900@60Hz,1680x1050@60Hz
1920x1080@60Hz: For HL24XD2 / HL42XD2 only.

Recommended: For HL19D2 / HL32D2: 1360x768
For HL24XD2 / HL42XD2: 1920x1080

Component Video and L/R Audio input
Supported resolution: 480i,480p,720p,1080i,1080p

Parental Control: Provide the parental Control (V-chip) function setting. Before entering the Parental Control sub-menu, user has to key in the password first. Enter the Parental Lock item, then the user can modify the restricted table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working. The inhibit channels or source signals can be unlocked through key in the correct password.
Note: This feature is only available in TV, Composite and S-Video source modes. 

(The default password is: 0 0 0 0.)

Password Setting: Change the 4-numeral parental control password. Three steps are required for changing the password: Enter Old Password > Enter New Password >Confirm New Password.

Note: This item is only available in TV, Composite and S-Video source modes. 

The default password is 0 0 0 0
Service mode [Factory mode] adjustment

There is no need to adjust the white balance for this model, do ADC only.
Step1: Turn on the TV, press “Menu”, then press number key 1 > 9 > 9 > 9 and “ENTER”, it will achieve the factory mode [Service Mode]

Step2: Change TV, press the “Current Source” to Component mode and change signal to 1080i mode, press the “Auto Color”;

Step3: Change TV, press the “Current Source” to PC mode and change signal to PC TIMING 137(1024X768); Pattern 147 (16 Grays), press the “Auto Color”.

Button Lock – Select On or Off to lock or unlock the control buttons on the side panel of the TV. When this function enables, the control buttons on your TV will be locked and TV only can be controlled by remote control only.
Block Unrated TV – When Block Unrated TV is set to on, your TV will block unrated program.
USA Parental Locks – Set the parental control level by MPAA or TV Rating.
Canadian Parental Locks – Set the parental control level by English Rating or French Rating.
Open V-Chip – Open V-Chip is an advanced V-Chip rating system for digital channels that are received.
The rating table will be updated by downloading the RRT5 data for blocking.

SMPS schematic

Back-light inverter

Sub-power

Audio amplifier

Closed Captions: Select a closed caption options. (Off / On / With Mute)
Analog Captions: Select an analog caption options. (CC 1-4 / TEXT 1-4)
Digital Captions: Select a digital caption options. (SERVICE 1-6)
Digital Captions Setup: Provide numerous options for setting the digital closed caption style in the sub-menu.
Style – Set to Automatic or Customer mode. If Custom mode is selected, user can modify the detail styles.  The setting result will be shown immediately on the bottom of the sub-menu OSD. 

Note: This feature is only available in Digital TV (ATSC) mode.

 Size – Digital closed caption font size, which can be set as Automatic, Small, Normal, or Large.
Font – Digital closed caption font style, which can be chosen as Automatic, Default, or Font 1 ~ 7.
Text Color – Automatic / White / Red / Green / Blue / Yellow / Magenta / Cyan / Black.
Text Opacity – Automatic / Solid /Flashing / Transparent / Translucent.
Background Color – Automatic /Black / White/ Red / Green / Blue / Yellow /Magenta / Cyan.
Background Opacity – Automatic /Solid / Flashing / Transparent / Translucent.
Edge Effect – Automatic / None/ Raised / Depressed / Uniform / Left / Shadow / Right Shadow.
Edge Color – Automatic / Red / Green / Blue / Yellow / Magenta / Cyan / Black / White.
Input Labels: User can edit the input labels.
Component Setting: This option only shows and is available in component mode, which provides fine tuning component display.
Phase – Adjust Picture Phase to reduce Horizontal-Line noise. The tuning range is from 0 to 31.
Preset – Restore the default component setting values.