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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Monday, 4 February 2019

EMERSON – SYLVANIA – MAGNAVOX – HOW TO ENTER SERVICE MODE – HOW TO UPDATE THE FIRMWARE UPDATE – POWER AND BACKLIGHT INVERTER SCHEMATIC

Emerson – Sylvania – Magnavox – how to enter service mode – how to update the firmware update – power and backlight inverter schematic

19 Inch LCD TV/DVD – Emerson, Sylvania and Manavox – Service mode, firmware update, power and inverter circuit diagram.
Applicable models:
19” LD195SSX          SYLVANIA 
19” LD190SS1          SYLVANIA 
19” LD195EMX           EMERSON
19” LD190EM1            EMERSON
19” 19MD359B/F7    MAGNAVOX
19” 19MD350B/F7    MAGNAVOX
Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed.  Also, do not attempt these adjustments unless the proper equipment is available.
Test Equipment Required
1. NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)
2. Remote control unit
3. Color Analyzer
How to make the Service remote control unit:
LD195SSX, LD190EM1, LD190SS1
Cut “A” portion of the attached remote control unit as shown in Fig.
LD195EMX
Cut “A” portion of the attached remote control unit as shown in Fig.
19MD359B/F7, 19MD350B/F7
Cut “A” portion of the attached remote control unit as shown in Fig.
Service mode:
1. Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit. 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 pressing [7] button on the service remote control unit, the display changes.
VCOM Adjustment
1. Operate the unit for more than 20 minutes.
2. Set the color analyzer and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. Press [3] button on the service remote control unit.
5. Press [CHANNEL UP/DOWN] buttons on the service remote control unit so that the color analyzer value becomes minimum.
White Balance Adjustment
The White Balance Adjustment should be performed when replacing the LCD Panel or Digital CBA.
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Raster(70%=70IRE, 40%=40IRE)
3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOLUME DOWN] button on the service remote control unit and select “C/D” mode.
5. [CUTOFF]
Press [1] button to select “COR” for Red Cutoff adjustment. Press [3] button to select “COB” for Blue Cutoff adjustment.
[DRIVE]
Press [4] button to select “DR” for Red Drive adjustment. Press [6] button to select “DB” for Blue Drive adjustment.
6. In each color mode, press [CHANNEL UP/DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 12000°K (x= 0.272 / y= 0.278 ±0.005)
HOW TO INITIALIZE THE LCD TV/DVD
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/DVD using the following procedure.
DVD Section  1. Turn the power on. 2. To enter the service mode, press the service button on the service remote control unit. - To cancel the service mode, press [POWER] button on the service remote control unit. 3. To put the LCD TV/DVD into the DVD mode, press [CH RETURN] or [PREV CH] on the remote control unit. 4. To put the LCD TV/DVD into the Flash clear mode, press [INPUT SELECT] or [SOURCE] buttons on the remote control unit in that order within five seconds.
When “OK” appears on the screen, the factory default will be set.
5. To exit this mode, press [CHANNEL UP/DOWN] button to go to TV mode, or press [POWER] button to turn the power off.
Note: The name of buttons may vary with the brand of unit.
LCD TV Section
1. Turn the power on.
2. To enter the service mode, press the service button on the service remote control unit.
- To cancel the service mode, press [POWER] button on the service remote control unit.
3. Press [INFO] button on the service 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 complete.
FIRMWARE RENEWAL MODE
DVD Section
1. Turn the power on and press [EJECT] button on the remote control unit to put the LCD TV/DVD into DVD mode. Then remove the disc.
2. To put the LCD TV/DVD into F/W version up mode, press [9], [8], [7], [6], and [MODE] buttons on the remote control unit in that order.
3. Insert the disc for version up into the disc slot.
4. The LCD TV/DVD enters the F/W version up mode automatically appears on the screen. Make sure to insert the proper F/W for the state of this model
5. After programming is finished, the disc will be ejected automatically; on the screen and the checksum will be shown.
6. Remove the disc.
7. Unplug the AC cord from the AC outlet. Then plug it again.
8. Press [EJECT] button on the remote control unit to put the LCD TV/DVD into DVD mode again.
9. Press [1], [2], [3], [4], and [INFO] buttons on the remote control unit in that order.
10. Press [CLEAR] button on the remote control unit.
When “OK” appears on the screen, the factory default will be set. Then the firmware renewal mode is complete.
11. To exit this mode, press [CHANNEL UP/DOWN] button to go to TV mode, or press [POWER] button to turn the power off.
Firmware Update Procedure
Note: There are two states (the User Upgrade and the Factory Upgrade) in firmware update.
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 memory to the USB port.
3. Plug the AC cord in the wall outlet and turn the power on.
4. The update will start.
[If the upgrade status screen isn’t displayed, repeat from step 1.]
5. When the firmware update is completed, the status will appear on the screen.
Unplug the AC cord and kindly remove the USB memory from the USB port. Plug the AC cord in the wall outlet again and turn the power on.
[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 complete.]
Power schematic- LD195SSX, LD195EMX, 19MD359B/F7
Power schematic 19MD350B/F7, LD190SS1, LD190EM1
Back-light inverter schematic LD195SSX, LD195EMX, 19MD359B/F7
Back-light inverter schematic 19MD350B/F7, LD190SS1, LD190EM1
Click on the pictures to magnify
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
Posted By: FRANK at 08:16
TAG: , , , , ,