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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Saturday 2 May 2020

REPAIR / SERVICING TV IZUMI TL32H413B

Technical description and composition of the IZUMI TL32H413B TV, panel type and applicable modules. The composition of the modules.
Izumi
Model: TL32H413B
Panel: LTA320AB02
T-CON: 320AB02CP2LV0.3; LMX4122T0, EM636165TS-6GTPS65167A, MAX9590, AG1686, 24C64WP
Inverter (backlight): SSI320S12 REV 0.6
PWM Inverter: OZ9966SN, A393F
MOSFET Inverter: STU4265 * 4
Power Supply (PSU): MLT666 REV: 2.8L
PWM Power: MC0628R, L6562D (PFC), OB2262 (PWM SOT23-6 6274T)
MOSFET Power: FQPF6N60C, K3683
MainBoard: B.TR901E
IC MainBoard: EM6A9160TC-4G, PS321, 25X80VSIC, 24C64AN, I1502NP
Tuner: TDQ-6F6 / T1260W
Technical Specifications TL32H413B
IZUMI TL32H413B
General recommendations for repairing TV LCD
Possible manifestations of defects
- The IZUMI TL32H413B TV does not turn on, does not respond to the remote control and the control panel buttons, does not blink with any indicators.
Failure in such cases should be sought in the MLT666 power supply circuits. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (FQPF6N60C, K3683) and rectifier diodes of the converters for possible 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.
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 the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may also be PWM (PWM) MC0628R, L6562D (PFC), OB2262 (PWM SOT23-6 6274T). It is checked only by replacement with a known good one.
- 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 their completion, 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 B.TR901E 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Testing or replacing elements EM6A9160TC-4G, PS321, 25X80VSIC, 24C64AN, I1502NP requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
The malfunction of the TDQ-6F6 / T1260W tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to independently repair the IZUMI TL32H413B 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!
FIRMWARE FOR SPI FLASH  ----------->   IZUMI TL32H413B , Main: B.TR901E, Panel: LTA320AB02


 The appearance of the MainBoard B.TR901E is shown in the figure below:
B.TR901E
B.TR901E can be used on TVs:
AKAI LTA-26N573HCA (Panel T260XW02 V.6), HYUNDAI H-LCD3202 (Panel LTA320AB02), IZUMI TL32H413B (Panel LTA320AB02).
The appearance of the power supply
Main features of the IZUMI TL32H413B device:
Installed matrix (LCD-panel) LTA320AB02.
The matrix control uses the Timing Controller (T-CON) 320AB02CP2LV0.3 ;.
The SSI320S12 inverter is used to power the backlight, controlled by the OZ9966SN, A393F PWM controller. As power elements of the inverter, keys of the STU4265 * 4 type are used.
The necessary supply voltages for all nodes of the IZUMI TL32H413B TV are generated by the MLT666 power supply module or its analogs using MC0628R, L6562D (PFC), OB2262 (PWM SOT23-6 6274T) microchips and power switches of the FQPF6N60C, K3683 type.
MainBoard - the main board (motherboard) is a module B.TR901E, using microcircuits EM6A9160TC-4G, PS321, 25X80VSIC, 24C64AN, I1502NP and others.
The TDQ-6F6 / T1260W tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AB02-W03
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 14%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 41 pins
Voltage: 12.0V
Posted By: FRANK at 06:41
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