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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Thursday 9 April 2020

REPAIR / SERVICING TV AIWA 32LE3010

Technical description and composition of the TV AIWA 32LE3010, panel type and applicable modules. The composition of the modules.
AIWA LED
Model: 32LE3010
Chassis / Version: V1K10
Panel: LC320EXN (SD) (A1) // LTA320AN01
LED driver (backlight): integrated into PSU
Power Supply (PSU): KPS-L070C2-01
PWM Power: FAN6755
MOSFET Power: 7N60L
MainBoard: 35015749 KL320S18-L-D1L MST6E182
IC MainBoard: SPI Flash: W25Q32BV
Tuner: QINGJIA AFT7 / W127
Specifications 32LE3010
AIWA 32LE3010
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The AIWA 32LE3010 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
Often in such cases, the KPS-L070C2-01 power module is faulty. 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 any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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. FAN6755 PWM controllers (PWM), if they do not have visible damage to the case 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.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- 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 35015749 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). When repairing an MB board, you need to check its components SPI Flash: W25Q32BV. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If a QINGJIA AFT7 / W127 tuner is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary power supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
TV users and owners must remember that attempts to self-repair an AIWA 32LE3010 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH  ----------->  AIWA 32LE3010 V1K10, Main: 35015749 KL320S18-L-D1L MST6E182 , Panel: LC320EXN (SD)(A1).

SCHEMATIC DIAGRAM  / psu   ------------------>    KPS-L070C2


type 32LE3010 V1K11 - Main Board: 35015749 REV-01 (Spi Flash W25Q32, Tuner: AFT7/W127, Led Panel: LTA320AN01

FIRMWARE FOR SPI FLASH  ----------->   AIWA 32LE3010 V1K11, Main: 35015749 KL320S18-L-D1L, Panel: LTA320AN01

 The appearance of MainBoard 35015749 is shown in the figure below:
35015749
35015749 can be used in TVs:
AIWA 32LE3010 (Panel LC320EXN (SD)(A1)), AIWA 42LE3110 (Panel K420B1CE10).
The appearance of the power supply
Key Features of AIWA 32LE3010:
Installed matrix (LED-panel) LC320EXN (SD) (A1) or LTA320AN01.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the TV AIWA 32LE3010 are generated by the KPS-L070C2-01 power module or its analogs using FAN6755 microcircuits and 7N60L power switches.
MainBoard - the main board (motherboard) is a module 35015749, using SPI Flash chips: W25Q32BV and others.
The QINGJIA AFT7 / W127 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SDA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 380 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V


 Trademark: AIWA, Model: 32LE3010.
Briefly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, sound: 10 watts.
The composition includes MainBoard 35015749 KL320S18-L-D1L MST6E182 and LCD panel (matrix) LC320EXN (SD) (A1), or LTA320AN01.
Power Supply Unit (PSU) KPS-L070C2-01 Power Supply.
AIWA 32LE3010 TV with an LCD display LC320EXN, 32 "(81 cm) diagonal in 16: 9 format. The required brightness of the screen is 350 cd / m² with LED backlighting. Dynamic contrast ratio of 80,000: 1 is achieved by special control of the LEDs. In this model uses side lighting from Edge LEDs.
The LC320EXN (SD) (A1) panel and the 35015749 motherboard software provide high-definition HD viewing at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
Supported media file formats: MP3, WMA, MPEG4, JPEG.
The power of the sound system 10 W (2x5 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 x2, component, VGA. 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, 1360x768.
Attention! The panel of the LC320EXN (SD) (A1) AIWA 32LE3010 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 05:26
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