Technical description and composition of the SONY KDL-24W605A TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-24W605A
Chassis / Version: BLE
Panel: SYV2421-01 // SYV2441
LED backlight: SYV2421-00.P1J01GA01
LED driver (backlight): ST240LD-2S01 REV1.0
PWM LED driver: BD9422EFV
Power Supply (PSU): Adapter 19.5V
PWM Power: PWM
MainBoard: 1-888-390-12 (173427812) BLE
IC MainBoard: CPU: CXD4748GB, CXD4743GB; DRAM: H5TC4G63MFR; NAND Flash: TC58NVG3S0FTAI0;
Tuner: 1-888-391-12
Control: IR: 1-733-693-12 1-887-030-12, WiFi: J20H069
Technical Specifications KDL-24W605A
SONY KDL-24W605A
General repair guidelines for TV LCD LED
If the KDL-24W605A TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is cut off, then it is necessary to check the diodes of the rectifier bridge and the key transistor of the converter for a breakdown of the PN junctions, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
Sometimes the SONY KDL-24W605A TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a possibility of a malfunction of the LED driver - power converter for the backlight LEDs of the SYV2441 panel, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by the power of the backlight unit.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
In cases of attempts to repair the motherboard 1-888-390-12 (173427812), it is necessary to check the operation of linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed with local heating.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: CXD4748GB, CXD4743GB; DRAM: H5TC4G63MFR; NAND Flash: TC58NVG3S0FTAI0; It requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
If a tuner 1-888-391-12 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 voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
It should be remembered! Attempts to repair the SONY KDL-24W605A 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!
The appearance of MainBoard 1-888-390-12 is shown in the figure below:1-888-390-12
1-888-390-12 can be used in TVs:
SONY KDL-42W654A (Panel T420HVF04.3), SONY KDL-24W605A (Panel SYV2421-01), SONY KDL-32W603A (Panel T320XVF05.0), SONY KDL-32W653A (Panel T320HVF01.0).
Main features of the device SONY KDL-24W605A:
Installed matrix (LED-panel) SYV2421-01 or SYV2441.
To power the backlight LEDs, the ST240LD-2S01 LED driver is used, controlled by the BD9422EFV PWM controller.
To power all the internal components of the SONY KDL-24W605A TV, an external adapter 19.5V type source using PWM chips is used.
MainBoard - the main board (motherboard) is a 1-888-390-12 module, using CPU chips: CXD4748GB, CXD4743GB; DRAM: H5TC4G63MFR; NAND Flash: TC58NVG3S0FTAI0; and others.
The tuner 1-888-391-12 provides reception of television programs and tuning to channels.
