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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Thursday, 7 February 2019

ERISSON 2107 – SANYO IIC CHASSIS - HOW TO ENTER SERVICE MODE - ADJUSTMENTS - CIRCUIT DIAGRAM - LA76810 – LC863320A

Erisson 2107 – Sanyo IIC chassis - How to enter service mode - adjustments - Circuit Diagram - LA76810 – LC863320A

Erisson 2107 – Sanyo IIC chassis - PAL/SECAM/NTSC(AV)  
Used ICs: LA7642 – LA76810 – LC863320A – AT24C04 – LA7840 – BSC2401N362 (LOT) – TCL2015D5B3 (TUNER) – Transistorized SMPS
PROD/FACTORY mode remote control button/factory use only）
1 Function: enter into "FACTORY" mode, "B/W BALANCE" mode, "ADJUST" mode and SETUP mode.
Description
Press PROD button to change as follows
NORMAL    FACTORY     B/W BALANCE        ADJUST

                                       SETUP
After enter into "FACTORY" mode the function of blue background when no signal is received and the function of automatic turnoff when no signal is received within ten minutes will be cancelled, and automatic search speed will be doubled. In B/W BALANCE mode, ADJUST mode and SETUP mode, the function of blue background display without signal and the function of auto-turnoff when no signal is received within ten minutes will be cancelled automatically.
EEPROM will remember "FACTORY" mode. The other modes will not be In "LINE MODE", besides MUTE button, the following eight buttons on user's remote control unit will work, with their functions changed as follows. Other buttons will not work Du The adjustment of adjusting options and setting options 
1). Operation instruction
Press PROD button to enter into "ADJUST" or "SETUP" mode.
Press POS+/POS- button to turn page up/down to select the options to be adjusted. If adjustment use remote control unit is used, some options can be selected directly by pressing one single button.
Press VOL+ or VOL- button to change the values of options selected.
During production, factory use remote control unit can be used to speed up adjustment. ring production, factory use remote control unit can be used to speed up adjustment.
The application of factory use remote control unit.
Description
For products of the same batch, the selection of all setting options and part of the adjusting modes of the products are same. Therefore it is enough to adjust only one of the same batch as a standard sample. Take the EEPROM of the sample as source EEPROM and copy it, then put the copies on the other products. By this means, the setting options and that part of adjusting options of the other products do not need to be adjusted, and the production can be speeded up considerably.
 For items need or probably need to be adjusted, our software offers especially the function of adjustment-use remote control unit o speed up production. Thus, in B/W balance adjustment mode, the options can be adjusted directly through one single button. In "ADJUST" mode, the option needs to be adjusted can be selected through one single button.
2). Description on special-purpose remote control buttons
a). "PROD/工厂" has the same function as that of the "PROD/工厂" button on an ordinary remote control unit.
b). "ADJUP/ADJDOWN" is used to turn pages upward and downward. It works only in "B/W BALANCE", "ADJUST" and "SETUP" mode. It has the same function as what the ordinary remote control "POS+" / "POS-" button has in "B/W BALANCE", "ADJUST" and "SETUP" mode.
c). "ADJ+/ADJ-" is used to increase/decrease adjustment of options selected. It works only in "B/W BALANCE", "ADJUST" and "SETUP" mode. It has the same function as what the ordinary remote control "VOL+"/"VOL-" button has in "B/W BALANCE", "ADJUST" and "SETUP" mode.
d). "POS+" and "POS-" are used for channel switch only. "LINE" works only in "B/W BALANCE" mode.
CIRCUIT DIAGRAM [Schematic]

EEPROM initialization function
 During cold start-up, CPU will check automatically if new EEPROM is used (e.g., EEPROM is replaced in maintenance). If a new EEPROM is found CPU will automatically read in initial data and store the data in the new EEPROM to ensure normal operation.
User's remote control unit enabling "FACTORY" button function
User's remote control unit has no "PROD (producer)" button. This may bring troubles to maintenance after TV sets exit the factory. Therefore a function equivalent to "PROD" function is specially designed in the software. Its operation is as follows
First press "REVIEW" button， then press and hold the "VOL-" button on the TV set and meanwhile press the "REVIEW" button again. The function of "PROD" button is enabled then. Repeat the above steps can operate again.
Operation instruction
Press PROD button to enter into "FACTORY" mode. Press and hold VOL- button on remote control unit till the volume decreases to "0", and meanwhile press POS- button on the remote control unit to open factory flag setting up menu.
The setting up menu consists of two screens used to adjust line 1 and line 2 respectively. After the setting up menu is open, press POS+/POS- button to select different options. If display item is selected, a yellow bar will point out the adjustable characters. If other options are selected, the OSD display will become red. Otherwise, the display is in green. If an option to be set is selected, press VOL+/VOL- button to set up different values.
Adjusting of display content：use POS+/POS- button to select the adjusting options on line1 or line 2. A yellow bar will point out the adjustable characters. Use VOL+/VOL- button to adjust the content of characters indicated by the yellow bar. Press PP button to select other characters on the same line.
The OSD of setting menu will keep on displaying. After setting is finished, press DISPLAY to quit.
The setting of factory logo is "Seeing is attaining", that is, the content, color, size and position displayed in the content line are the same as in normal display except that    represents the normal factory flag display is blank after quitting. The effect attainable after adjustment can be seen objectively in the course adjustment.    The setting of the two lines of display content should not overlap (even if one line is set to "OFF") to avoid abnormal phenomena.
Press PROD Factory button till exit.
Posted By: FRANK at 04:31
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