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 32WL65R

Technical description and composition of the TOSHIBA 32WL65R TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 32WL65R 32WL65Rs
Chassis / Version: PE0119
Panel: T315XW02 V.1
T-CON: T315XW01 V5 / T260XW02 V2
Inverter (backlight): 4H.V0708.381 / B1 V070
PWM Inverter: OZ964SN
MOSFET Inverter: P2804ND5G
Power Supply (PSU): PE0117 V28A00016401
PWM Power: STR-Z4569, STR-W6765, BA00JC5W
MOSFET Power: D2396, D413, D454
MainBoard: PE0119 V28A000163A1 & PE0216 A-1 V28A00020901
IC MainBoard: CPU: TC90702FG, TMP86FS49AUG; Scaler: FL18538LF
Tuner: ENG39A07GF
Specifications 32WL65R
TOSHIBA 32WL65R
General recommendations for repairing TV LCD
Possible malfunctions
- The TOSHIBA 32WL65R 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 PE0117 power supply is usually faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches (D2396, D413, D454) and rectifier diodes of the converters for possible short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) STR-Z4569, STR-W6765, BA00JC5W, if they do not have visible damage to the housing and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately 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 inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the PE0119 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).
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner ENG39A07GF and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
It should be remembered! Attempts to independently repair the TOSHIBA 32WL65R TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!




Repair MainBoard
The appearance of MainBoard PE0119 is shown in the figure below:
PE0119
PE0119 can be used in TVs:
TOSHIBA 26WL65Rs (Panel T260XW02 V.5 75002324), TOSHIBA 26WL66Zs (Panel T315XW01 V5), TOSHIBA 32WL66R (Panel T315XW01 V.5), TOSHIBA 32WL66Rs (Panel V315XW02 V.1), TOSHIBA 47WL66Rs (Panel V470H1-L02 Rev.C4), TOSHIBA 32WL65R 32WL65Rs (Panel T315XW02 V.1).
The appearance of the power supply
Main features of the TOSHIBA 32WL65R device:
Installed matrix (LCD panel) T315XW02 V.1.
The matrix control uses the Timing Controller (T-CON) T315XW01.
To power the backlight, an inverter 4H.V0708.381 is used, it is controlled by the PWM controller OZ964SN. As power elements of the inverter, keys of the type P2804ND5G are used.
The necessary supply voltages for all nodes of the TOSHIBA 32WL65R TV are generated by the PE0117 power module or its analogs using the STR-Z4569, STR-W6765, BA00JC5W microchips and power switches of the D2396, D413, D454 type.
MainBoard - the main board (motherboard) is a PE0119 module using CPU chips: TC90702FG, TMP86FS49AUG; Scaler: FL18538LF and others.
The ENG39A07GF tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315XW02 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
 Brand: TOSHIBA, Model: 32WL65R.
Short from TV: LCD, 32 ", 1366x768, 720p HD, sound: 20 watts.
The composition includes MainBoard PE0119 V28A000163A1 & PE0216 A-1 V28A00020901 and LCD-panel T315XW02 V.1.
Power Supply Unit (PSU) PE0117 V28A00016401 power Supply.
TOSHIBA 32WL65R LCD TV with T315XW02 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The brightness of the screen is 500 cd / m² by CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 800: 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 digital signal generation takes place in the standard max 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound speaker system 20 W (2x10 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 x2, audio x4, S-Video, component, VGA, HDMI. 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.
The power consumed by the TV in the operating mode from the network is 153 watts.
Overall dimensions: with stand 794x611x300 mm, without stand 794x559x116 mm.
TV Weight: with stand: 21.5 kg, without stand: 17.6 kg.
Attention! The T315XW02 V.1 panel of the TOSHIBA 32WL65R LCD TV 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 05:26
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