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 32XV550PR

Technical description and composition of the TOSHIBA 32XV550PR TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 32XV550PR
Panel: LTA320HA02
Inverter (backlight): SSI320_16B01 REV0.3
PWM Inverter: OZ9968SN
Trans Inverter: LT-3216
Power Supply (PSU): SRV2169WW
PWM Power: SSC9500, FA5501AN (PFC), MIP2F2 (Standby)
MainBoard: PE0532 V28A000710B1
IC MainBoard: FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE
Tuner: ENG37E11GF
Specifications 32XV550PR
TOSHIBA 32XV550PR
General recommendations for repairing TV LCD
Possible manifestations of defects
- The TOSHIBA 32XV550PR does not turn on. There is no reaction to the remote control or to the control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, the SRV2169WW power module is often faulty. First of all, you need to make sure that the MIP2F2 (Standby) power converter is operational. It is also necessary to measure the output voltages of other converters in the operating mode and, if they are absent, check the power switches and rectifier diodes for a probable short circuit.
The operation of the PFC node can be judged by the presence of an increased voltage (380-410V) on the line rectifier (electrolytic capacitor of the line filter).
In case of breakdowns of the diodes 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 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. It can be frequency-setting circuits, or elements supplying the PWM controller, as well as damping circuits, or elements of OOS (negative feedback) stabilization.
The reason for the breakdown of the power switch can be PWM controllers (PWM) SSC9500, FA5501AN (PFC), which are checked by replacing with a known good one.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
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, does not respond to the remote control. The indicator blinks or signals standby mode.
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). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - FLI32652H, HY5PS121621C, CXB1444R, STA333W, 0747EFI T5CB5-6UK1 F1789ZAE. Defective components should be replaced.
Before changing the tuner ENG37E11GF, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention! Users and owners of 32XV550PR televisions who do not have the appropriate qualifications, knowledge and experience are strongly advised against self-repair attempts to avoid negative consequences that could lead to complete non-serviceability of the device.




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 32XV550PR device:
Installed matrix (LCD-panel) LTA320HA02.
To power the backlight, an SSI320_16B01 inverter is used, it is controlled by the OZ9968SN PWM controller. The transformer LT-3216 is installed in the inverter converter.
The necessary supply voltages for all nodes of the TOSHIBA 32XV550PR TV are generated by the SRV2169WW power module or its analogs using SSC9500, FA5501AN (PFC), MIP2F2 (Standby) microcircuits.
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


Brand: TOSHIBA, Model: 32XV550PR.
Short from TV: LCD, 32 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3.
The composition uses MainBoard PE0532 V28A000710B1 and an LCD panel (matrix) LTA320HA02.
Power Supply Unit (PSU) SRV2169WW Power Supply.
TOSHIBA 32XV550PR LCD TV with LTA320HA02 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. Screen brightness of 480 cd / m² is provided by 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 a graphic resolution according to 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 x2, 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 786x553x224 mm, without stand 786x525x85 mm.
TV Weight: with stand: 14 kg, without stand: 12.4 kg.
Attention! The TOSHIBA 32XV550PR's 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 05:45
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