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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Wednesday 27 March 2019

SHARP LC-13S1E _ LC-15S1E _ LCD TV _ SERVICE MODE & ADJUSTMENTS

SHARP LC-13S1E   LC-15S1E  LCD TV _ SERVICE MODE & ADJUSTMENTS





B+ VOLTAGE ADJUSTMENT

  • Adjust the voltage of the pin (4) of P1900 to 5.00 ±0.02V with R3714.
  • Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely.
COUNTER - BIAS ADJUSTMENT
  • Vary the "COM BIAS" setting on Page 2 of the adjustment process mode so that the contrast be sharpest (black looks most sinking).

TAMP ADJUSTMENT
  • Receive the upper left of 75% white half color bar signal.
  • Make the "PAL TAMP" adjustment to get the "Y" reading in the range of AE thru BD.
  • If the adjustment of "PAL TAMP" is executed, write its adjustment value to the "SECAM TAMP" manually.
WHITE BALANCE ADJUSTMENT
  • Adjust "RCUTOFF", "BCUTOFF", "RGAIN" and "BGAIN" on the page 2 of the adjustment processing so as to obtain the color of the same level as the standard set.
FACTORY SETTINGS
Perform a factory setting after completing all adjustments.
  •  A "POWER" keys is made on with pushing an "TV/VIDEO" and "MENU" keys at the same time.
  •  "K" of the inspection process mode is displayed on the screen upper left.
  •  CH (ù) and VOL (+) keys are pushed about 2 seconds at the same time.
  •  Release keys, if "E" is displayed on the screen upper left and "COMPLETE" is displayed on the bottom of it.
  •  After a while, a power will be in a standby mode and a setup will be finished.
  • Note: "First installation" serves on "Deutsch".
LAMP ERROR DETECTION
This LCD color television has a function (lamp error detection) to be turned OFF automatically for safety when the lamp or lamp circuit is abnormal.
If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the followings occur.
  • The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front side of TV turns from green to red.)
  • If the situation 1 happens 5 times sequentially, television can not be turned ON. (The power LED remains red.)
Countermeasures
Check when turning OFF the lamp error detection
When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment process with the power LED red. Entering the adjustment process turns OFF the error detection and turns ON TV.
This enables the operation check to detect errors in the lamp or lamp circuit.
Check whether "ERROR NO RESET" on line 3, page 1 of the adjustment process is 1 or more. If it is 1 or more, it indicates the lamp error detection was executed.

RESETTING OF LAMP ERROR COUNT
  • After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO RESET" on line 3, page 1 of the adjustment process and set the number to 0 using the volume button.
NOTE:  13=LC-13S1E, 15=LC-15S1E
Afterwards, perform the operation check to confirm that the lamp error detection does not function.
Posted By: FRANK at 04:46
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