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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 23 February 2019

TCL SERVICE MODE IC USED TOSHIBA TMPA 8809 ONE CHIP MICOM

TCL SERVICE MODE IC USED TOSHIBA TMPA 8809 ONE CHIP MICOM



     To solve the problems happened in production process, workers who join to assemble this model should master its specifications.  This model TV set has two modes: customer mode and factory mode.  The former is setted for customer and the later for production in factory and repairing in after sales.  Customer mode can be operated with remote control handset or keys at the front panel of the TV or both.  But, factory mode only can be operated with remote handset.

     To enter the Factory mode, after power ON, press Volume Dn at the front panel, and set it to '0'.  Then press "Display" key on the remote handset, there will be "D" displayed on the screen shows it entered in Factory mode.

     Now, the shortcut keys on the factory adjustment remote hand set can be used .  Press the 'Standby' key to 'Exit' factory mode, but system setting data"6" should be kept the state before storing.  So do not change it.  For factory production, can set "Bit-0" to '1' in menu OPT, so every time pressing the remote handset can enter D-Mode directly after open the sets in AC of DC power sets On, also it can be activated by key "D-Mode" on the remote handset.  Do not forget to set "Bit-0" to "0" in menu OPT and power them On in AC or DC mode one time , so the set will disable factory mode.

     The key 'I2C"on the remote handset can interrupt the communication CPU with I2C bus, usually this interrupt state can be used in automatic white balance adjustment and auto geometry adjustment.

ADJUSTMENT WITHOUT INSTRUCTION [WHITE BALANCE]

  1. First adjust the data G-Cut to = 50.
  2. Adjust Blue data.
  3. Press V-Scan to stop Vertical scan.
  4. Observe the color of the center horizontal line.
  5. Back to normal V-Scan.
  6. Repeat steps 2, 3, 4 & 5 until the color of the center horizontal line change to amethyst.
  7. Adjust G-Cut data.
  8. Repeat steps 3,4, 5 & 7 until center horizontal line changes white.
  9. Observe ladder signal , adjust G-Gain and B-Gain let the bright bar change to purity white
Posted By: FRANK at 05:02
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