Technical description and composition of the SONY KDL-50W808C TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-50W808C
Chassis / Version: 1-893-880-11
Panel: V500FWME01
T-CON: T550HVN08.2
LED driver (backlight): integrated into MainBoard
PWM LED driver: BD9397EFV
MOSFET LED driver: STU30N01
Power Supply (PSU): ACDP-120E03 Adapter 19.5V 6.2A
MainBoard: 1-893-880-11 173525511
IC MainBoard: SPI Flash: W25Q32BV, EMMC: THGBMBG7D2KBAIL
Tuner: CE241ZP
Technical Specifications KDL-50W808C
SONY KDL-50W808C
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SONY KDL-50W808C does not turn on, the indicators on the front panel do not light up and do not blink. The TV does not respond to the control buttons and the remote control.
Most likely in this case, the main switching power supply (IIPS) ACDP-120E03 is faulty.
The external ACDP-120E03 Adapter power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
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 during 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.
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 an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 1-893-880-11 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, you need to check the health of its elements - SPI Flash: W25Q32BV, EMMC: THGBMBG7D2KBAIL 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).
Before replacing the CE241ZP tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention! For users and owners of KDL-50W808C TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service Manual 97 pages of 2015 for the model ---------> KDL-43W7 * C, KDL-50W7 * C, KDL-55W7 * C, KDL-43W8 * C, KDL-50W8 * C, KDL-55W8 * C, KDL-55W755C, KDL -55W756C, KDL-43W805C, KDL-43W807C, KDL-43W808C, KDL-43W809C, KDL-50W808C, KDL-55W807C, KDL-55W808C, KDL-55W809C.
The appearance of MainBoard 1-893-880-11 is shown in the figure below:1-893-880-11
1-893-880-11 can be used in TVs:
SONY KDL-43W756C (Panel V430FWME03), SONY KDL-50W807C (Panel V430FWME03).
The appearance of the power supply
Main features of the device SONY KDL-50W808C:
Installed matrix (LED-panel) V500FWME01.
The matrix control uses the Timing Controller (T-CON) T550HVN08.2.
To power the backlight LEDs, a converter is used, combined with the main board 1-893-880-11, controlled by the BD9397EFV PWM controller. As power elements of the LED driver, keys of the STU30N01 type are used.
To power all the internal components of the SONY KDL-50W808C TV, an external source such as ACDP-120E03 Adapter 19.5V 6.2A is used.
MainBoard - the main board (motherboard) is a 1-893-880-11 module using SPI Flash chips: W25Q32BV, EMMC: THGBMBG7D2KBAIL and others.
The CE241ZP tuner provides TV reception and channel tuning.
