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 !

Tuesday 5 February 2019

MAGNAVOX – EMERSON AND SYLVANIA LCD TVS - HOW TO ENTER SERVICE MODE – FIRMWARE UPDATE – SMPS CIRCUIT DIAGRAM

Magnavox – Emerson and Sylvania LCD TVs - How to enter service mode – Firmware update – SMPS circuit diagram

Service Mode, Firmware update, Initialization, Purity check, VCOM adjustment – SMPS schematic – Universal remote control set-up codes - Sylvania, Emerson and Manavox 32 inch LCD TVs.
Applicable to
MAGNAVOX  2MF301B/F7 (Serial No.: DS1, DS2)
EMERSON  LC320EM2 (Serial No.: DS1, DS3)
SYLVANIA  LC320SS2 (Serial No.: DS1, DS2)
32MF301B/F7  MAGNAVOX (Serial No.: TH1)
LC320SS2  SYLVANIA (Serial No.: TH1)
LC320EM2  EMERSON (Serial No.: TH1)
Service mode
1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Features”.
4. Select “Current Software Info”.
5. Press [0], [4], [2], [5], [7], [4] and [INFO] buttons on the remote control unit in this order. The following screen appears.
Purity Check Mode This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels. 1. Enter the Service mode. 2. Each time the [7] button on the remote control unit is pressed, the display changes. 3. To cancel or to exit from the Purity Check Mode, press [CH RETURN] or [PREV CH] button. VCOM Adjustment 1. Operate the unit for more than 60 minutes. 2. Set the color analyzer at the zero point calibration and bring the optical receptor pointing at the center of the LCD-Panel.Note: The optical receptor must be set perpendicularly to the LCD Panel surface. 3. Enter the Service mode. 4. Press [3] button on the remote control unit. 5. Press [CHANNEL UP/DOWN] buttons on the remote control unit so that the color analyzer value becomes minimum. 6. To cancel or to exit from the VCOM Adjustment, press [CH RETURN] or [PREV CH] button. Power supply and back light inverter board circuit diagram CAUTION: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.  Otherwise it may cause some components in the power supply circuit to fail.
Click on the schematics to zoom in

White Balance Adjustment The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA. Purpose: To mix red and blue beams correctly for pure white. Symptom of Maladjustment: White becomes bluish or reddish. 1. Operate the unit for more than 60 minutes. 2. Enter the Service mode. 3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode. “Drive” appears on the screen. 4. Set the Note: The optical receptor must be set perpendicularly to the LCD Panel surface. Note: The optical receptor must be set perpendicularly to the LCD Panel surface. 5. Press [3] button to select the “HDB” for High Drive Blue adjustment. (“HDB” appears on the screen.) 6. Press [MENU] button. The internal Raster signal appears on the screen. (“Internal (Single)” appears on the upper right of the screen. 7. Press [CHANNEL UP/DOWN] buttons to adjust the color temperature becomes 12000°K (x= 0.272 / y= 0.278 ±0.002). 8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears on the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature. 9. If necessary, adjust the “HDB” or “HDR” again. 10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears on the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature. 11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears on the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature. 12. If necessary, adjust the “LDB” or “LDR” again. 13. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode.  If there is no message under “[WB]” section, this adjustment completes.  If “Drive settings are NG. Retry.” is displayed, repeat above steps from 5. to 12. Then check “Debugging Message” again. If “Drive settings are NG. Retry.” is displayed, replace the LCD Panel or Digital Main CBA. 14. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button. HOW TO INITIALIZE THE LCD TV The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to select a language and program channels after the set has been initialized. To put the program back at the factory-default, initialize the LCD TV using the following procedure. 1. Turn the power on. 2. Enter the service mode.  - To cancel the service mode, press [POWER] button on the remote control unit. 3. Press [FREEZE] button on the remote control unit to initialize the LCD television. 4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is completed. FIRMWARE RENEWAL MODE Note: There are two states (the User Upgrade and the Factory Upgrade) in firmware update. User Upgrade:   Upgrade the firmware only. The setting values are not initialized. Factory Upgrade (Firmware upgrade):  Upgrade the firmware and initialize the setting values. Factory Upgrade (Flash upgrade):  Upgrade the firmware and initialize the setting values along with the setting data adjusted at the factory such as White Balance, etc. The identification of User Upgrade and Factory Upgrade are done by the filename. 1. Turn the power off and unplug the AC Cord. 2. Insert the USB storage device to the USB port. 3. Plug the AC cord in the wall outlet and turn the power on. 4. The update will start and the status will appear on the screen. Note: If this status screen isn’t displayed, repeat from step 1. 5. When the firmware update is completed, the status will appear on the screen. Remove the USB storage device from the USB port. Turn the power off and turn the power on again. Note: When the Factory Upgrade is used, after restarting TV, shift to initial screen menu in service mode. "INITIALIZED" will appear on the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is completed. Universal remote control set-up codes: Magnavox: 0018 0042 0049 0101 0152 0680 Emerson: 0004 0042 0049 0065 0101 0113 0119 0145 0152 0166 0191 0214 0215 0225 0324 0378 0421 0456 0460 0604 0611 0654 Sylvania: 0392
Posted By: FRANK at 08:07
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