Saturday, October 10, 2015

SANYO LED-DP46142 SERVICE MODE SOFTWARE UPGRADE AND POWER SUPPLY CIRCUIT

SANYO BLU RAY

SANYO LED-DP46142 

LED TV

SERVICE MODE SOFTWARE UPGRADE AND POWER SUPPLY CIRCUIT 

Adjustment instruction
SERVICE MODE  At any input source then press the “<”, “EXIT” and “OK” (Remote control) to enter factory mode During Factory menu, if “MENU” key is pushed, system will exit factory mode.
Items of Factory menu
When in Component/ Video (Composite)/ ANT inputs then press the “Left -> Exit -> OK” key of remote control to enter factory mode..
During Factory menu, if “MENU” or “EXIT” key is pushed, system will exit factory mode. Press up and down key can move high light item from Color Temperature -> Timer Clear -> Preset Channel- >NVRAM Clear-> Full Power -> Source Calibration -> Reset to Default -> RF Burn In -> USB F/W Upgrade -> UART Enable-> Bypass Gamma. The Timer Clear, NVRAM Clear and Reset to Default items will have a check dialog “yes or no” to do or not. Push “Enter” key can select high light item function. (Press left and right can adjust value)
Display panel Burn in Time on the bottom. Display model name, firmware version and released date on top.
1) Factory Color Temp data edit
This is used for Factory adjusts color temperature. Don't change this value.
2) Timer Clear
Reset the timer which records hours of LCD panel burn in (Don't clear timer after FW update.)
This item will have a check dialog “yes or no” to do or not.
- Time in factory mode: Time function shall be displayed automatically. Saving the total time of system power on (LCD turn on), and count the time automatically. The timer is continuous and saved (per 60 minutes) forever, unless it will be reset by doing “Timer Clear”.
3) Preset channel
Load preset channel for production line.
4) 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: Gamma table, Channel table (Favorite channel, Channel label etc.), Model 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 “yes or no” to do the initial or not.
Notice: After this item is processed then the DUT needs to be powered off then AC powered off.
5) Full power (For factory test only) 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, Bass default value, Treble default value. Press enter key to turn on Full Power and OSD stay display until press enter key to recover from Full Power
6) Source Calibration (For factory used only, don't do it without correct machine).
Source Calibration (gain/offset) must be adjusted color by firmware automatic adjustment in PC, and Component input source.
This item will have a result dialog “OK” or “NG”.
7) Reset to Default
Reset all settings of OSD menu to default value.
- Reset settings: Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting (Contrast, Brightness etc.), Common setting (Volume, Language etc.), Parental Control (Rating, Password etc), Closed Caption.
- Please execute Reset to Default once after FW is upgraded.
8) RF Burn In (For factory test only)
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 “ANT/Cable" and channel is NTSC channel 3.
9) USB F/W Upgrade
- We don't recommend upgrade FW here. We recommend upgrade FW in normal power on status (not in factory menu), just plug in USB with correct FW file name. (Refer to item 7) Upgrade firmware through USB.
10) UART Enable (For factory test only)
Enable to communicate with Auto-Alignment system.
11) Bypass Gamma
For factory test value of gamma.
USB Software updated
(1) Insert the USB with the firmware which the file name is matched with the model name in factory mode.
 (2) If system detect the same firmware file name, USB upgrade message would appear automatically.
(3) Press Left key to select Yes, and then press OK key to start the upgrading.
(4) Upgrading is starting, please wait for the progress finish.
(5) When the progress completed, please follow the instruction to remove USB and restart by AC off then on.
Working principle analysis of the unit
1. NTSC signals flow:
Antenna signal will be send to tuner ENV56U05D8F, then Tuner will be demodulating and output standard video signal TV-CVBS, and sound SIF signal. TV-CVBS will send to the master control IC ZR39748 to video decode, de-interlace and scaler, then output LVDS level drive for panel display. The sound IF (SIF) will be fed into ZR39748, after demodulating, pre-amplifying, bass adjusting and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707L.
2. Composite/Component signal flow
Composite signal and Component signal will be fed to ZR39748 to perform video decode, deinterlace and scaler, then output LVDS drive level for panel display. Audio signal from Composite/Component terminal via matched resistance is fed to ZR39748 to bass adjust and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707L.
3. HDMI signal flow
Two HDMI video signals are directly fed to the master control IC ZR39748 to digital decode, image scale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in ZR39748 to bass adjust and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707L.
4. USB signal flow
USB signal via USB connector sent to ZR39748 and its A/D conversion to YPbPr output for ZR39748, then output R/G/B of 24 bit to back end module to Video decode, de-interlace and image scale, then send to LVDS level drive for panel display. Sound signal of USB signal via matched resistance and sent to ZR39748 to bass adjust and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707L.
POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN