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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Sunday, 3 May 2020

REPAIR / SERVICING TV IZUMI TL15H310B

Technical description and composition of the IZUMI TL15H310B TV, type of panel and applicable modules. The composition of the modules.
Izumi
Model: TL15H310B
Chassis / Version: B.TD604C
Panel: LQ150X1LGN2C
Lamp backlight: 2 LAMP CCFL
T-CON: K3128TP
Inverter (backlight): integrated into PSU
Power Supply (PSU): SHP1501A-102 SER.6674044 REV: 1.0
MainBoard: B.TD604C 7063
IC MainBoard: Cpu: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P
Tuner: TDQ-6F6 / T126CW
Control: IR: 3330115020131 333011502141
Technical Specifications TL15H310B
IZUMI TL15H310B
General recommendations for repairing TV LCD
Possible malfunctions
- IZUMI TL15H310B does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
Usually, with such manifestations, the defect is caused by faulty elements in the main power module SHP1501A-102. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
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), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually 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.
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 B.TD604C 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 attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - Cpu: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the TDQ-6F6 / T126CW tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.

Attention TV owners! Attempts at self-repair of IZUMI TL15H310B are not recommended by the manufacturer and can lead to serious negative consequences!
Repair MainBoard
The appearance of the MainBoard B.TD604C is shown in the figure below:
B.TD604C
B.TD604C can be used in TVs:
AKAI LTA-22E307 (Panel M220Z1-L05 Rev.C1), IZUMI TL22H615B (Panel M220Z1-L03 Rev.C1), IZUMI TL19H615B (Panel SVA190WX02TB), IZUMI TL22H614B (Panel M220Z1-L03).
The appearance of the power supply
Main features of the IZUMI TL15H310B device:
Installed matrix (LCD panel) LQ150X1LGN2C.
The matrix control uses the Timing Controller (T-CON) K3128TP.
To power the backlight, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the IZUMI TL15H310B TV is carried out by the SHP1501A-102 power module, or its analogues.
MainBoard - the main board (motherboard) is a B.TD604C module, using Cpu chips: TDA15021H / N1C00, Scaler: NT68565FG, Eeprom: 416A2GLI = 24C16, Audio: TDA1517P and others.
The TDQ-6F6 / T126CW tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SHARP
Model: LQ150X1LGN2C
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.1x228.1 mm
Surface: Antiglare (Haze 28%), Hard coating (2H)
Brightness: 260 cd / m²
Contrast Ratio: 350: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 16 (Tr + Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V
Posted By: FRANK at 06:23
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