Hitachi LS42S504 LCD TV – How to enter the service mode, software update, 715G3196 1B poawer board[SMPS] schematic.

This specification applies to the 42.0 inch Color TFT-LCD Module T420HW06 V5. This LCD module has a TFT active matrix type liquid crystal panel 1,920x1,080 pixels, and diagonal size of 42.0 inch. This module supports 1,920x1,080 mode. Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal and Frame Rate Control (FRC) for each dot.
The T420HW06 V5 has been designed to apply the 10-bit 2 channel LVDS interface method. It is intended to support displays where high brightness, wide viewing angle, high color saturation, and high color depth are very important.

Firmware Upgrade

Use PC to write software to a flash storage, press “on” button to start the TV. (Take L46S603 for example)
1. Insert the flash storage into the USB port, and you will see a picture in which you can choose “YES” or “NO” (Picture1), you choose “YES”, and then the software will update automatically.
2. After software update is finished, you put out the flash storage and restart the TV.
3. Press “menu+1999+select”, check whether software version is ok.

ADC Adjustment
Ⅰ . In the TV mode adjust volume to zero, press menu key and then press number key 1  9  9 9. [Service mode]. It will achieve the factory mode. Select the item of White Balance and press right key to enter it.

Change TV, press the item “Current Source” to Component mode and change signal to 1080i mode, press the item “Auto Color”; Change TV, press the item “Current Source” to PC mode and change signal to PC TIMING 137(1024X768) Pattern 147 (16 Grays), press the item “Auto Color”

White Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
Before started adjust white balance, please set the Ca210 Channel to 05 Channel and set it’s mode to xyLv mode.

The tolerance of the Cold color coordinates should be less than ± 10; The tolerance of the Normal color coordinates should be less than ± 20; The tolerance of the Warm color coordinates should be less than ± 20;

How to setting the Ca210 channel.

you can reference to Ca210 user guide or simple use the “Memory CH” up or down to set the channel to 05 channel, and use the “Mode” key to set the mode to xyLv.
Following is the procedure to do white-balance adjust

[can use the HDMI white balance adjustment to cover the white balance of all source modes, this method is meeting to the Zoran 785 software.]

HDMI Mode:
Ⅰ . In the TV mode adjust volume to zero, press menu key and then press number key 1 9  9 9. It will achieve the factory mode. Select the item of White Balance and press right key to enter it.

715G3196 SMPS board schematic

Before to adjust the white balance, please press the factory mode OSD of “Reset” to reset all white balance factory setting.

In the White Balance you can adjust 8 items.
1 > R Offset, G Offset, B Offset Æ R, G, B Offset adjust.
2 > R Gain, G Gain, B Gain Æ R, G, B Gain adjust.
3 > ZR-Bright adjust;
4 >ZR-Contrast adjust;
5 >ZR-T ÆColor Temp adjust;

Gain adjustment:

Adjust Cool color-temperature:
1. Set the pattern generator to pattern 104 or 0 IRE pattern. And adjust the Item “ZR-Bright” to min luminance.

2. Switch the Ca210 to xyLv-mode (with press “MODE” button)
3. Switch the Ca210 channel to Channel 05 (with up or down “MEMORY CH” button)
4. The LCD-indicator on Ca210 will show x =272, y =278, Lv can adjust to max luminance.
5. Use the item R Offset and B Offset adjust to Adjust black balance: use 20 IRE(Pattern 190) signal, and adjust the black balance, until the Ca210 show x =272, y =278.
6. Use the item R Gain and B Gain to adjust white balance: use 100 IRE (Pattern 105) signal, and adjust the white balance, until the Ca210 show x =272, y =278.
7. Adjust item “ZR-Contrast” to check color temperature is saturation or not: Add by 7 steps and then to adjust the item R Gain and item B Gain to check the color temperature is saturation or not, until is saturation.
8. Enter the item “Color Temp” to select another color temperature to adjust.

Adjust Normal temperature:
1. Set the pattern generator to pattern 104 or 0 IRE pattern. Adjust the Item “ZR-Bright” value and can adjust to min luminance
2. Switch the Ca210 to T△uvLv-mode (with press “MODE” button)
3. Switch the Ca210 channel to Channel 05 (with up or down “MEMORY CH” button)
4. The LCD-indicator on Ca210 will show T=9300K.
5. Adjust the Color Temp item: Normal, until Ca210 indicator reached the value T=9300k.

Adjust Warm color-temperature:
1. Set the pattern generator to pattern 104 or 0 IRE pattern. Adjust the Item “ZR-Bright” value and can adjust to min luminance
2. Switch the Ca210 to TuvLv-mode (with press “MODE” button)
3. Switch the Ca210 channel to Channel 05 (with up or down “MEMORY CH” button)
4. The LCD-indicator on Ca210 will show T=6500K.
5. Adjust the Color Temp item: Warm, until Ca210 indicator reached the value T=6500k.
Press “Exit” button on remote control to quit from factory mode.

NOTE 1
If you choose to do EEPROM Initialization (EEPROM Init), you MUST write down all White Balance values before doing so. These values will be reset to a default value.
All white balance factory adjustments will be LOST. It can be done as a NOTE anywhere in same page, please.
NOTE 2
Activating Reset to Default Settings (Reset to Def) will zero BOTH hour counters, the one for back light time and the one for Total time.