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 30 March 2020

REPAIR / SERVICING TV TOSHIBA 37AV605P

Technical description and composition of the TOSHIBA 37AV605P TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 37AV605P 37AV605PR
Chassis / Version: 715G3368-1
Panel: LC370WXN (SB) (B1)
T-CON: 6870C-0240C
Inverter (backlight): 6632L-0541A PPW-EE37HD-0 (T)
Power Supply (PSU): 715G3368-1
PWM Power: A6069H, FAN7529, L6599D
MOSFET Power: 20N60C3, 2SK4097
MainBoard: 715G3385-1
IC MainBoard: Cpu: MST9A885GL-LF, Flash: MX25L3205, Eeprom: 24C32WP
Tuner: TAFT-S710D
Specifications 37AV605P
TOSHIBA 37AV605P
General recommendations for repairing TV LCD
Possible manifestations of defects
- The TOSHIBA 37AV605P does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Most likely in this case, the main switching power supply (IPS) 715G3368-1 is faulty. It is necessary to measure its output voltages and, if they are absent, to check the short circuit probability in the converters power switches (20N60C3, 2SK4097) and rectifier diodes.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips A6069H, FAN7529, L6599D are usually checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 715G3385-1 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - Cpu: MST9A885GL-LF, Flash: MX25L3205, Eeprom: 24C32WP which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
The malfunction of the TAFT-S710D tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, remind users! Attempts to independently repair the TOSHIBA 37AV605P TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!





Repair MainBoard
The appearance of the MainBoard 715G3385-1 is shown in the figure below:
715G3385-1
715G3385-1 can be used in TVs:
TOSHIBA 26AV605PR (Panel LTA260AP02 004), TOSHIBA 32AV605PR (Panel LK315LA51 75014913), TOSHIBA 32AV613DG (Panel LC320WXN-SBA1), TOSHIBA 37AV605P 37AV605PR (Panel LC370WXN (SB)(B1)).
The appearance of the power supply
Main features of the TOSHIBA 37AV605P device:
Installed matrix (LCD panel) LC370WXN (SB) (B1).
The matrix control uses the Timing Controller (T-CON) 6870C-0240C.
An inverter 6632L-0541A is used to power the backlight.
The necessary supply voltages for all nodes of the TOSHIBA 37AV605P TV are generated by the 715G3368-1 power module or its analogs using A6069H, FAN7529, L6599D microcircuits and power switches of the 20N60C3, 2SK4097 type.
MainBoard - the main board (motherboard) is a 715G3385-1 module using Cpu microcircuits: MST9A885GL-LF, Flash: MX25L3205, Eeprom: 24C32WP and others.
The TAFT-S710D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC370WXN-SBB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Active Area: 819.6x460.8 mm
Frequency: 60Hz

Brand: TOSHIBA, Model: 37AV605P.
Shortly from the TV: LCD, 37 ", 1366x768, 720p HD, sound: 40W, HDMI connectors: 3.
The composition uses MainBoard 715G3385-1 and LCD-panel LC370WXN (SB) (B1).
Power Supply Unit (PSU) 715G3368-1 power Supply.
TOSHIBA 37AV605P LCD TV with LC370WXN LCD, 37 "(94 cm) diagonal display in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio of 23000: 1 is achieved by special operation control It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the acoustic system of sound 40 W (2x20 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART x2, RGB, VGA, HDMI x3. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The power consumed by the TV in the operating mode from the network is 200 watts.
Overall dimensions: with stand 902x637x293 mm, without stand 902x591x95 mm.
TV Weight: with stand: 17.1 kg, without stand: 13.2 kg.
Attention! The TOSHIBA 37AV605P LCD TV panel LC370WXN (SB) (B1) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 06:08
TAG: , , , ,