SANYO LCD-DP42410 SERVICE MODE AND POWER SUPPLY CIRCUIT

SANYO LCD-DP42410 SERVICE MODE AND POWER SUPPLY CIRCUIT

SANYO LCD-DP42410 

SERVICE MODE AND POWER SUPPLY CIRCUIT 

Power test
Connect main board, power board and IR board according the wiring diagram, connect the power and press power key(Remote controller or Keypad) button to turn on the TV.
a) Test the pin voltage of P802/power board , the data is shown in table.

P802	Pin1,2	Pin3,4	Pin5,6,7	Pin8,9	Pin10,11,12	Pin13	Pin14	Pin15	Pin16
Voltage	GND	22.8-25.2V	GND	11.4-12.6V	4.75-5.25V	On:2V-5.5V Off: 0-0.5V	<0.6V	2.5-5V PWM	2-5V

b) Test the pin voltage of P803/power board, the data is shown in table.

P803	Pin1,2,3,4,5	Pin6,7,8,9,10	Pin11	Pin12	Pin13	Pin14
Voltage	22.8-25.2V	GND	NC	2V-5V	2.5-5V PWM	NC

Adjustment instruction
At any input source then press the remote controller buttons “<”, “EXIT” and “>” to enter factory mode.
During Factory menu, if “MENU” or “EXIT” key is pushed, system will exit factory mode.

Source Calibration
1.Set the TV input source to YPbPr; ASTRO-859 signal setting to PG2 program number 933(1080i). (PG2 mode Timing 933 and Pattern 924 100% Color Bar.)

2. Entering into factory Mode: Press up or down key of remote control to select “Auto Calibration”, Press OK key to start.

-> Source calibration performed automatically when finished that will show OK.

Change input source to PC.
Change Astro-859 Timing to No.953 (640x480@60Hz) and pattern on 953(8step V-grayscale). Repeat step 2 to do source calibration.

Color Temperature Adjustment & Check
Set input source.
1.Set the signal generator Astro-859 timing to PG2-924 on Video & YPbPr, PG2-860 on HDMI, and PG2-963 on PC. Pattern sets 956 on all of the source.

Then press Astro-859 “FORMAT” key and DOWN key, then adjust RGB value to R:204, G:204, B:204

2. In factory mode OSD menu, select “Color Temperature” item, press “OK” key to enter the item. R, G, B drive values are set for Warm, Medium, and Cool independently.

3. Set Color Temperature for “Warm”, “Medium” and “Cool” with following spec.

Color Temp.	Cool	Medium	Warm
x	0.267	0.281	0.301
y	0.271	0.288	0.310
Tolerance	± 0.01	± 0.01	± 0.01

If the x and y value are larger than specification,
Decrease Red drive from default value.
Increase Blue drive from default value.
If the x or y or both x and y value is/are smaller than specification.
Decrease Blue drive from default value
According to a x and y value, please following adjustment of 1 or 2.
1 If x value is higher than spec
Decrease Red drive from default value.
2 If y value is higher than spec,
Increase Blue drive from default value
4 Exit Factory Mode:
After finishing adjusting color temperature, press [MENU] or [EXIT] to exit factory mode.

Items of Factory menu
Vendor may customize design and add adjustment items Factory menu as far as all required items are included.
Press up and down key can move high light item from Color Temperature Warn -> Color Temperature Medium -> Color Temperature Cool ->Preset Channel-> Source Calibration -> Reset to Default. The NVRAM Clear and Reset to Default items will have a check dialog “YES” and “NO” to do or not. Push “Enter” key can select high light item function. (Press left and right can adjust value) Display model name, firmware version and released date on top.

1) Color Temperature for Warm
Press up or down key can select high light item function.
Press enter key to enter the item.
Following data for color temp shall be edited manually.
-R, G, B data for each preset.
-Press “Up” or “Down” key to select “R”, “G”, “B” item
-Press “Left” or “Right” key to set the “R”, “G”, “B” value.
-Press “MENU” or “EXIT” item to exit to factory mode
2) Color Temperature for Medium
Press up or down key can select high light item function.
Press enter key to enter the item.
Following data for color temp shall be edited manually.
-R, G, B data for each preset.
-Press “Up” or “Down” key to select “R”, “G”, “B” item
-Press “Left” or “Right” key to set the “R”, “G”, “B” value.
-Press “MENU” or “EXIT” item to exit to factory mode
3) Color Temperature for Cool
Press up or down key can select high light item function.
Press enter key to enter the item.
Following data for color temp shall be edited manually.
-R, G, B data for each preset.
-Press “Up” or “Down” key to select “R”, “G”, “B” item
-Press “Left” or “Right” key to set the “R”, “G”, “B” value.
-Press “MENU” or “EXIT” item to exit to factory mode
4) Time Clear
Press up or down key can select high light item function.
Press “Left” & “Right” key to select the item.
The timer on bottom is to record power on time for panel life.
It was set one time on production only.
5) Preset Channel
This is for factory to do some tests.

6) NVRAM Clear
Initialize program’s default values to NVRAM for following adjustment items accuracy.
In factory mode it is the first and important step to make sure all values are default value and correct.
- Reset settings: Channel table, Mode table (H/V Position, Clock, Phase), Source dependent setting
(Contrast, Brightness etc.), Common setting (Volume, Language etc.), Parental Control (Rating,
Password etc), Closed Caption.
To avoid a mistake initial process after factory setting is done. This item will have a check dialog to do the initial or not.
NOTICE: After this item is processed, the DUT needs to be powered off then AC powered off.
7) Full Power
This is for power consumption testing.
To measure the maximum power consumption of TV set, we adjust the value of following items to maximum.

- Video: Contrast maximum value, Brightness maximum value, Backlight maximum value.
- Audio: Volume maximum value.
Press right key to turn on Full Power and OSD stay display until press enter key to recover from Full Power.
8) Source Calibration
Auto Calibration (gain/offset) must be adjusted color by firmware automatic adjustment in PC, and Video3(Component) input source.
This item will have a result dialog “OK” or “NG”.
9) Reset to Default
This function is same as “NVRAM Clear”, but it will power off automatically after processing this function.
10) RF Burn In
Use “snow” pattern for burn in. Selected items are “On” and “Off”. While turn on burn in mode, firmware will automatically turn off “Auto power off” function.
If there is no power supply suddenly, firmware will re-enter burn in mode automatically when power supply is back.
Pressed the “Power” key, firmware will automatically turn off burn in mode.
- Burn in mode: Source is “TV”, Input Configuration is “Antenna” and channel is NTSC channel 2.

USB F/W Upgrade
The function is using USB device to upgrade firmware via USB port. Copy the firmware file to USB device root path.
Execute this function to update firmware.
Note: After finishing updated, the system will reboot automatically.

Protocol Switch
This is for debugging only. It is no use for service.
13) EDID Write
This is for writing EDID on the VGA source.

14) MEMC Demo Mode
To separate screen into two parts that left side is 60Hz and right side is 120Hz for display.
15) MEMC Level
Changing MEMC level to Weak, Medium or Strong.

POWER SUPPLY CIRCUIT 

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