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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Monday, 30 March 2020

REPAIR / SERVICING TV TOSHIBA 32W300P

Technical description and composition of the TOSHIBA 32W300P TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 32W300P 32W300Ps
Chassis / Version: CMF111B
Panel: LC320W01 (SL) (22)
T-CON: LC370WXN1 / LC320W01 P / N: 6870C-0060C
Inverter (backlight): LC320W01 SLAVE P / N: 6632L-0325C, MASTER P / N: 6632L-0324C
Power Supply (PSU): ETL-XPC-204T
PWM Power: STR-W6765, LA5779
MainBoard: CMF111B / NP-140TL
IC MainBoard: VCT6973G-B3-000, SIL9025CTU, TDA9832T
Tuner: TAFV-W623D
Control: CT-8015
Specifications 32W300P
TOSHIBA 32W300P
General recommendations for repairing TV LCD
Possible malfunctions
- The TOSHIBA 32W300P TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the fault should be sought first in the ETL-XPC-204T power supply module. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) STR-W6765, LA5779, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
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 TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the CMF111B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). When repairing an MB board, you need to check its components VCT6973G-B3-000, SIL9025CTU, TDA9832T. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the TAFV-W623D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention! For users and owners of 32W300P TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.

 SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    TOSHIBA 32W300PS



 The appearance of the MainBoard CMF111B is shown in the figure below:
CMF111B
CMF111B can be used in TVs:
SHARP LC-26AD5RU-BK (Panel LK255T3LZ5AZ), SHARP LC-32AD5RU-BK (Panel LK315T3LZ5CZ LK315T3LZ93), TOSHIBA 32W300P 32W300Ps (Panel LC320W01 (SL)(22) ).
The appearance of the power supply
Main features of the TOSHIBA 32W300P device:
Installed matrix (LCD panel) LC320W01 (SL) (22).
The matrix control uses the Timing Controller (T-CON) LC370WXN1.
To power the backlight used inverter LC320W01.
The necessary supply voltages for all nodes of the TOSHIBA 32W300P TV are generated by the ETL-XPC-204T power module or its analogs using the STR-W6765, LA5779 microcircuits.
MainBoard - the main board (motherboard) is a CMF111B module, using VCT6973G-B3-000, SIL9025CTU, TDA9832T and others.
The TAFV-W623D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320W01-SL22
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit), CIE1931 71%
Response Time: 8/10 (Tr / Td)
Frequency: 60Hz
Lamp Type: 18 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V


 Brand: TOSHIBA, Model: 32W300P.
Short from TV: LCD, 32 ", 1366x768, 720p HD HDMI Connectors: 2.
The composition includes MainBoard CMF111B / NP-140TL and LCD panel (matrix) LC320W01 (SL) (22).
Power Supply Unit (PSU) ETL-XPC-204T Power Supply.
TOSHIBA 32W300P LCD TV with LC320W01 LCD, 32 "(81 cm) diagonal size in 16: 9 format. 450 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 1200: 1. 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 generation of a digital signal occurs in standard The ports are 480i, 480p, 576i, 576p, 720p, 1080i, and stereo sound is realized by two built-in speakers using the NICAM STEREO audio processing system.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), S-Video, component, SCART x2, RGB, VGA, HDMI x2. 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.
A digital tuner is capable of receiving television channels in DVB-T standards.
The power consumed by the TV in the operating mode from the network is 170 watts.
TV mass: 16.5 kg.
Attention! The TOSHIBA 32W300P LCD TV panel LC320W01 (SL) (22) 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 05:13
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