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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Wednesday, 8 April 2020

REPAIR / SERVICING TV AKAI LEA-22C05P

Technical description and composition of the TV AKAI LEA-22C05P, type of panel and applicable modules. The composition of the modules.
AKAI LED
Model: LEA-22C05P
Chassis / Version: LS07 JUG7.820.699-2
Panel: CLAA215FA04
LED driver (backlight): integrated into PSU
PWM LED driver: A8504
Power Supply (PSU): PW0500205
PWM Power: LD7575B (PWM flyback)
MOSFET Power: SVD4N65F
MainBoard: JUG7.820.699-2
IC MainBoard: TSUMV26KE-LF, EN25F40-100GCP, 24LC32B, YD1517P
Tuner: CDT-3LC4I1-00
AKAI LED
Model: LEA-22C05P
Chassis / Version: JUG7.820.699-1
Panel: CLAA 215FA04S
LED driver (backlight): integrated into MainBoard
PWM LED driver: A8504
Power Supply (PSU): PW0500205
PWM Power: LD7575BGS (PWM flyback)
MOSFET Power: SVD4N65F, EPC30-B752
MainBoard: JUG7.820.699-1
IC MainBoard: TSUMV26KU-LF, 24LC32B, AF38A2D, MVF38A2D, TDA1517P, 4803A, A8504, F40-100GCP
Tuner: CDT-3LC4I1-00
Control: A4001031 & A10010025
Technical Specifications LEA-22C05P
AKAI LEA-22C05P
General repair guidelines for TV LCD LED
Possible malfunctions
- The AKAI LEA-22C05P TV does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In such cases, the PW0500205 power supply is usually faulty. It is necessary to measure the output voltages in the secondary circuits, and if they are absent, check the operability of the power switches (SVD4N65F, EPC30-B752) 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. PWM chip LD7575BGS (PWM flyback) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the JUG7.820.699-1 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips TSUMV26KU-LF, 24LC32B, AF38A2D, MVF38A2D, TDA1517P, 4803A, A8504, F40-100GCP and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner CDT-3LC4I1-00 may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
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.
FIRMWARE FOR SPI FLASH  ----------->   AKAI LEA-22C05P LS07 JUG7.820.699-2, Main: JUG7.820.699-2, Panel: CLAA215FA04



 The appearance of the MainBoard JUG7.820.699-1 is shown in the figure below:
JUG7.820.699-1
JUG7.820.699-1 can be used on TVs:
AKAI LEA-19C05P (Panel CLAA185WA04), AKAI LEA-22C05P (Panel CLAA 215FA04S), Akai LEA-24C05P (Panel V236H1-LE2 Rev.C1).
The appearance of the power supply
Key Features of the AKAI LEA-22C05P:
Installed matrix (LED-panel) CLAA 215FA04S.
To power the backlight LEDs, a converter is used, combined with the main board JUG7.820.699-1, controlled by the A8504 PWM controller.
The necessary supply voltages for all nodes of the TV AKAI LEA-22C05P are generated by the PW0500205 power module or its analogs using LD7575BGS (PWM flyback) microcircuits and power switches of the SVD4N65F, EPC30-B752 type.
MainBoard - the main board (motherboard) is a JUG7.820.699-1 module, using TSUMV26KU-LF, 24LC32B, AF38A2D, MVF38A2D, TDA1517P, 4803A, A8504, F40-100GCP, and others microcircuits.
The tuner CDT-3LC4I1-00 provides the reception of television programs and tuning to channels.


 Brand: AKAI, Model: LEA-22C05P.
Short from TV: LCD, LED backlight, 22 ", 1920x1080, 1080p Full HD, sound: 4 watts.
The composition uses MainBoard JUG7.820.699-1 and the LCD panel (matrix) CLAA 215FA04S.
Power Supply Unit (PSU) PW0500205 Power Supply.
AKAI LEA-22C05P TV with a CLAA LCD, diagonal size 22 "(56 cm) in 16: 9 format. The required brightness of the screen is 250 cd / m² with LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000: 1 This model uses Edge LED lateral illumination.The TV’s design and technical features include viewing programs and movies in high quality HD with a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Input high-frequency or video signal can be processed in analog PAL, SECAM system, NTSC. Graphic processing and formation takes place in the digital signal standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound system 4 W (2x2 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, component, VGA, HDMI. 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.
The power consumed by the TV working in the network mode is 35 watts.
Overall dimensions: With stand 772x546x200 mm, Without stand 772x486x46 mm.
Attention! The CLAA 215FA04S panel of the AKAI LEA-22C05P LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
Posted By: FRANK at 04:42
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