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 !

Friday 6 March 2020

REPAIR / SERVICING TV SONY KDL-32P3020

Technical description and composition of the SONY KDL-32P3020 TV, panel type and applicable modules. The composition of the modules.
SONY
Model: KDL-32P3020
Chassis / Version: SE2
Panel: LTA320WT-L06
T-CON: 320WTC2LV3.9
Inverter (backlight): LT320SLS12 REV 02
PWM Inverter: OZ9966SN
MOSFET Inverter: 2SK4075
Trans Inverter: U320W3S16
Power Supply (PSU): A-1276-472-A - 1-874-218-11 - 1-728-835-11 - GS2
PWM Power: MIP2H2 (7pin), MCZ3001DB (18pin), TDA8932BT
MOSFET Power: 2SK3568
MainBoard: 1-874-223-11 = 1-874-223-12 - A-1276-477-A - E9001003E
IC MainBoard: CXD9922R, TDA 9973AHL / 8/12, 24C32, 24C02, TDA9886TS
Tuner: BTP-HC401 (10)
Control: Remote: RM-ED009, IR: 1-874-222-11 (1-728-836-11)
Technical Specifications KDL-32P3020
SONY KDL-32P3020
General recommendations for repairing TV LCD
Diagnostics of malfunctions and repairs SONY KDL-32P3020, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
Malfunctions of the power module A-1276-472-A - 1-874-218-11 - 1-728-835-11 - GS2 can be expressed in different ways, for example, the SONY KDL-32P3020 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of working capacity. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the 2SK3568 converter; The complete inoperability of the power supply unit can be caused by a short circuit of the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip MIP2H2 (7pin) MCZ3001DB (18pin), TDA8932BT or breakage of resistors in its harness.
If the SONY KDL-32P3020 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors. All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Repair of the motherboard 1-874-223-11 = 1-874-223-12 - A-1276-477-A - E9001003E must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements CXD9922R, TDA 9973AHL / 8/12, 24C32, 24C02, TDA9886TS requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If you suspect a malfunction of the BTP-HC401 tuner (10), first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to self-repair a SONY KDL-32P3020 TV without the appropriate qualifications and experience can lead to its complete unrepairability!



The appearance of MainBoard 1-874-223-11 is shown in the figure below:
1-874-223-11
1-874-223-11 can be used in TVs:
SONY KDL-32P3000 (Panel LTA320WT-L06), SONY KDL-32U3000 (Panel LTA320WT-L06), SONY KDL-37P3000 (Panel T370XW02), SONY KDL-40P3000 (Panel T400XW01 V0), SONY KDL-26S3000 (Panel V260B1-L07 Rev.C3 ), SONY KDL-32P3020 (Panel LTA320WT-L06), SONY KDL-40U3000 (Panel T400XW01 V0).
The appearance of the power supply
Main features of the device SONY KDL-32P3020:
Installed matrix (LCD-panel) LTA320WT-L06.
The matrix control uses the Timing Controller (T-CON) 320WTC2LV3.9.
To power the backlight, an inverter LT320SLS12 is used, it is controlled by the PWM controller OZ9966SN. The transformer U320W3S16 is installed in the inverter converter. As power elements of the inverter, keys of the 2SK4075 type are used.
The necessary supply voltages for all nodes of the SONY KDL-32P3020 TV are generated by the A-1276-472-A power supply module or its analogs using MIP2H2 (7pin), MCZ3001DB (18pin), TDA8932BT and 2SK3568 power switches.
MainBoard - the main board (motherboard) is a module 1-874-223-11, using microcircuits CXD9922R, TDA 9973AHL / 8/12, 24C32, 24C02, TDA9886TS and others.
Tuner BTP-HC401 (10) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320WT-L06
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V

Posted By: FRANK at 06:36
TAG: , , , ,