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 32XV500PR

Technical description and composition of the TOSHIBA 32XV500PR TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 32XV500PR
Panel: LTA320HA02
T-CON: 320HAC2LV0.0
Inverter (backlight): SSI320_16B01 REV0.3
Power Supply (PSU): PE0531
PWM Power: A6169 (8), STR-Z2589, 2A20112 (PFC)
MOSFET Power: 10N60, P10NK80
Mainboard: PE0532
IC MainBoard: FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE
Tuner: ENG37E11GF
Specifications 32XV500PR
TOSHIBA 32XV500PR
General recommendations for repairing TV LCD
Possible malfunctions
- The TOSHIBA 32XV500PR TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In most of these cases, the PE0531 main switching power supply is faulty. Then it is necessary to measure its secondary (output) voltages and, if they are absent, it is necessary to check the serviceability of power switches (10N60, P10NK80) and rectifier diodes of the converters for a possible short circuit. The operation of the PFC node is checked by the presence of an increased voltage (380-400V) on the filter capacitor of the rectifier network.
In the event of breakdowns in the secondary circuits, the converters can emergencyly operate in the short circuit mode, and during a short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, powering the PWM controller, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback.
PWM chips A6169 (8), STR-Z2589, 2A20112 (PFC) are checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it 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.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the PE0532 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). In cases of complex repairs of MB (SSB) and with the necessary skills and equipment, sometimes it may be necessary to replace its chips FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner ENG37E11GF and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.




Repair MainBoard
The appearance of MainBoard PE0532 is shown in the figure below:
PE0532
PE0532 can be used in TVs:
TOSHIBA 32CV500PR (Panel LTA320AA03), TOSHIBA 37CV500PR (Panel LC370WXN-SAC1 75011157), TOSHIBA 42CV500PR (Panel LC420WXN-SAB1 75011173), TOSHIBA 42XV550PR (Panel LC420WUN (SA)(A1)), TOSHIBA 32XV550PR (Panel LTA320HA02), TOSHIBA 32XV500PR (Panel LTA320HA02), TOSHIBA 37XV501PR (Panel LC370WUN (SA)(B1)).
The appearance of the power supply
Main features of the TOSHIBA 32XV500PR device:
Installed matrix (LCD-panel) LTA320HA02.
The matrix control uses the Timing Controller (T-CON) 320HAC2LV0.0.
To power the backlight used inverter SSI320_16B01.
The necessary supply voltages for all nodes of the TOSHIBA 32XV500PR TV are generated by the PE0531 power module or its analogs using A6169 (8), STR-Z2589, 2A20112 (PFC) microcircuits and power switches of the 10N60, P10NK80 type.
MainBoard - the main board (motherboard) is a PE0532 module, using chips FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE and others.
The ENG37E11GF tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320HA02-001
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 14%), Hard coating (3H)
Brightness: 470 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V

Trademark: TOSHIBA, Model: 32XV500PR.
Short from TV: LCD, 32 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3.
The composition uses MainBoard PE0532 and an LCD panel (matrix) LTA320HA02.
Power Supply Unit (PSU) PE0531 Power Supply.
TOSHIBA 32XV500PR LCD TV with 32 "(81 cm) diagonal LCD display in 32: 9 format. LCD screen brightness of 500 cd / m² is ensured by backlighting with CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 3000: 1. Dynamic contrast ratio of 30000: 1 is achieved by special control of the backlight operation.The design and technical capabilities of the TV provide for viewing broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in the graphic resolution of the standard 1080p (Full HD). The frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC .. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the acoustic system of sound 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, audio x3, S-Video, 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, 1280x1024.
The power consumed by the TV in the operating mode from the network is 169 watts.
Overall dimensions: with stand 786x570x258 mm, without stand 786x525x87 mm.
TV Weight: with stand: 15.4 kg, without stand: 12.4 kg.
Attention! The TOSHIBA 32XV500PR LCD TV panel LTA320HA02 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 05:40
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