REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Monday 25 March 2019

SANYO PDP 42XR9DA - SOFTWARE UPDATE PROCEDURE - WORKING PRINCIPLE

SANYO PDP 42XR9DA - SOFTWARE UPDATE PROCEDURE - WORKING PRINCIPLE




SOFTWARE UPGRADE

Software writing and upgrade method with ISP writing-device.
  • Main board upgrade: connect a four-pin wire of the ISP writing-device to Debug port(X806) on the main board; Unit upgrade: connect VGA ports of the ISP writing-device and the main board, enter factory menu and set “ISP Mode” to “ON”.
  • Using Mstar writing-tool on line, click “Connect” menu, if it displays “Device EN25B32“ as shown in fig, the connection is success, if it fails, select “EN25B52” of “Device” manually and press “Connect” again.
  • Click “Read” and select the file written (MERGE.bin for example) as shown in fig.
  • Click “Auto”, select “All chip”, “program” and other items as shown if fig.
  • Press “Run” to begin writing and there are two steps: Erase and Program.
  • If the process of writing succeeds, it will display “Pass” near “Run” as shown in fig.
   Repeat step 2) and 5) to write the program to the other units without exit the ISP interface

UPGRADE BY USB PORT
  1. Make sure the USB device is formatted as FAT32.
  2. Copy the program named Merge.bin to USB device.
  3. Insert the USB device to USB port of the unit, power on and select RF-ATV channel, begin USB upgrade after OSD disappear. It will display blue when read the data from USB device, while display red when write Flash. The flash must be pull out when display red. It will flicker in red and blue if the process of writing is abnormal.
  4. The method are not applicable to all the USB devices, try another one if a certain USB device is inapplicable.
WORKING PRINCIPLE OF THE UNIT
  • PAL/SECAM signal flow
   Antenna reception PAL/SECAM signal will be send to tuner TDA1616, which contains frequency turning, HF and IF amplifier circuit and is controlled by master control IC MSD109 (comprises CPU) through I2C bus. The analog IF signal via intermediate frequency amplifying, video SAW filter K3953 and audio SAW filter K9656 to input to analog demodulate IC (IF) R2A10406NP, after demodulating and output standard video signal TV-CVBS and sound IF signal (SIF).  TV-CVBS will send to the master control IC MSD109 to video decode, deinterlace and scale, then output LVDS level drive for panel display. The sound IF (SIF) will be fed into MSD109, after demodulating, pre-amplifying, bass adjusting and volume control, the sound signal will separate into L/R channels and input to earphone amplifier BH3547F amplifying, then output two ways. One way will be sent to earphone, another will be sent to digital sound amplifier R2A15112FP amplifying then sent to speaker.
  • DVB-T signal flow
   Antenna reception DVB-T signal will be sent to tuner TDA1616, after frequency tuning, HF amplification, IF amplification and SAW FILTER, output IF signal to demodulation chip CE6353, via QAM demodulation, fed to MSD109 for information source decoding in the format of standard serial TS stream.
HD video signal via decoding to A/D conversion and OSD superposition, at last output LVDS drive level for panel display.  HD audio signal via decoder built-in MSD109, resumed to multi- channel sound of Dolby AC-3. The audio signal will be sent to back end to perform bass adjustment and volume control, then it will separate into L/R channels and input to earphone amplifier BH3547F amplifying, then output two ways. One way will be sent to earphone, another way will be sent to digital sound amplifier R2A15112FP amplifying then sent to speaker.
  • AV/SV signal flow
   SV signal and the first path AV signal switch automatically via S-terminal socket, the signal and the second path AV signal will be fed to MSD109 to perform video decode, deinterlace and scale, then output LVDS drive level for panel display.  Audio signal from AV/SV via matched resistance is fed to external audio switch HEF4052 to switch, then it is directly sent to MSD109 to bass adjust and volume control, the sound will separate into L/R
channels and input to earphone amplifier BH3547F amplifying, then output two ways. One way will be sent to earphone, another way will be sent to digital sound amplifier R2A15112FP amplifying then sent to speaker.
  • PC/YPrPb signal flow
   PC and the second path YPbPr signal are switched via external switcher PI5V330, then the signal and the first path YPbPr signal will be sent to MSD109 A/D conversion, output R/G/B of 24 bit to back end module to digital decode, image scale and OSD superposition, then send to LVDS level drive for panel display.  Sound signal of PC/YPrPb via matched resistance and a-c couple are sent to MSD109 to bass adjust and volume control, the sound will separate into L/R channels and input to earphone amplifier BH3547F amplifying, then output two ways. One way will be sent to earphone, another way will be sent to digital sound amplifier R2A15112FP amplifying then sent to speaker.
  • HDMI signal flow
  Three HDMI video signals via switcher PS321 are directly fed to the master control IC MSD109 to digital decode, image scale and OSD superposition, then output LVDS drive level for panel display.  HDMI audio signal via decoder built-in MSD109 is fed to back end to bass adjust and volume control, the sound will separate into L/R channels and input to earphone amplifier BH3547F amplifying, then output two ways. One way will be sent to earphone, another way will be sent to digital sound amplifier R2A15112FP amplifying then sent to speaker.
Posted By: FRANK at 01:59
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