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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Sunday, 3 May 2020

REPAIR / SERVICING TV IZUMI TL22F405R

Technical description and composition of the IZUMI TL22F405R TV, type of panel and applicable modules. The composition of the modules.
Izumi
Model: TL22F405R
Panel: M215HW01 V.0
MainBoard: B.SPC81B-1 9245
IC MainBoard: TDA9885TS, Spi flash U11 Feon T80-75HCP, Eeprom U13 432A-2GLI, Tuner TDQ-6F6 / T1260W, Sound: TDA1517P
Tuner: TDQ-6F6 / T1260W
Technical Specifications TL22F405R
IZUMI TL22F405R
General recommendations for repairing TV LCD
Possible malfunctions
- The IZUMI TL22F405R TV does not turn on and does not show any signs of turning on. There are no reactions to the control buttons or the remote control.
Failure in such cases should be sought in the power supply circuits. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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.
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. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should 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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the B.SPC81B-1 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - TDA9885TS, Spi flash U11 Feon T80-75HCP, Eeprom U13 432A-2GLI, Tuner TDQ-6F6 / T1260W, Sound: TDA1517P and replace the failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the tuner TDQ-6F6 / T1260W, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured on 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 to users! Self-repair of the IZUMI TL22F405R TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH  ----------->   IZUMI TL22F405R - U11

FIRMWARE FOR SPI FLASH  ----------->   IZUMI TL22F405R - U13

 
 The appearance of the MainBoard B.SPC81B-1 is shown in the figure below:
B.SPC81B-1
B.SPC81B-1 can be used in TVs:
AKAI LTC-15S04 LTC-15S04M (Panel LTA150XH-L06), BBK LD2424HDU (Panel HT235F01-100), FUSION FLTV-19W6 (Panel M190A1-P0A), FUSION FLTV-22W6 (Panel CLAA215FA), IZUMI TL22F405R (Panel M215HW01 V.0), IZUMI TL22F405B (Panel M215HW01 V.0), IZUMI TL19H405B (Panel M190MWW3).
Main features of the IZUMI TL22F405R device:
Installed matrix (LCD panel) M215HW01 V.0.
The required supply voltage for all nodes of the TV IZUMI TL22F405R provides a switching power supply.
MainBoard - the main board (motherboard) is a B.SPC81B-1 module, using TDA9885TS, Spi flash U11 Feon T80-75HCP, Eeprom U13 432A-2GLI, Tuner TDQ-6F6 / T1260W, Sound: TDA1517P and others.
The TDQ-6F6 / T1260W tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: M215HW01 V0
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 3.8 / 1.2 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Posted By: FRANK at 05:47
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