Technical description and composition of the LG 42CS560 TV, panel type and applicable modules. The composition of the modules.LG
Model: 42CS560 ZD
Chassis / Version: LD01M
Panel: LC420WUE (SC) (A3)
T-CON: LC420WUN-SCA1 6870C-0310C
Inverter (backlight): integrated into PSU
PWM Inverter: BD9270F
Trans Inverter: EBJ60711208
Power Supply (PSU): EAX64648001 (1.6), LGP42-12LF
PWM Power: STR-W6053N, HS01G (PFC SO-8)
MOSFET Power: 2SK3868, K10A60D
MainBoard: EAX64272803 (0) EBR75149838
IC MainBoard: CPU: LGE2111-E8; SPI Flash: MX25L8006EM
Tuner: TDSS-G101D
Control: IR: LW4500 LV2500 LK550
Specifications 42CS560
LG 42CS560
General recommendations for repairing TV LCD
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the LG 42CS560 ZD TV, as well as the external elements of the housing. Based on visible external changes in the state of the components, it is often possible to determine the direction of the troubleshooting before making the necessary measurements. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Sometimes the LG 42CS560 TV just does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power supply module EAX64648001 (1.6), LGP42-12LF. If it is working properly, you must check the standby batteries on the Main Board. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
In cases where the LG 42CS560 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power. It should be remembered that when the protection is turned off in order to diagnose a malfunction, there is always a risk of failure of the power elements of the inverter. After repair, it is necessary to restore all standard converter protection circuits.
On the EAX64272803 (0) EBR75149838 motherboard, in case of a malfunction, you should first check the operation of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: LGE2111-E8; SPI Flash: MX25L8006EM. BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the TDSS-G101D tuner, if there is no tuning for 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
Owners and users of the LG 42CS560 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Schematic diagram ------------> LG 42CS560 Chassis LD01M.
CHASSIS : LA25C; MODEL : 42CS560, 42CS560-UE
The appearance of the MainBoard EAX64272803 is shown in the figure below:EAX64272803
EAX64272803 can be used in TVs:
LG 42LK450-TG (Panel V420H2-L05), LG 32LK430 ZG (Panel LC320WUN (SC)(A2)), LG 42LK430 (Panel LC420WUE (SC)(A2)), LG 42CS560 ZD (Panel LC420WUE (SC)(A3)), LG 32LV3400 ZG (Panel LC320EUN (SD)(V2)), LG 32CS560 (Panel LC320WUN (SC)(A2)), LG 32LK455 32LK455C (Panel EAX64272803).
PSU Advanced
The 42CS560 model uses the EAX64648001 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the SO-8 PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device LG 42CS560:
Installed matrix (LCD panel) LC420WUE (SC) (A3).
The matrix control uses the Timing Controller (T-CON) LC420WUN-SCA1.
To power the backlight, a converter is used, combined with the power supply, controlled by the BD9270F PWM controller. The transformer EBJ60711208 is installed in the inverter converter.
The necessary supply voltages for all nodes of the LG 42CS560 TV are generated by the EAX64648001 power supply module or its analogs using STR-W6053N, HS01G (PFC SO-8) microcircuits and power switches of the 2SK3868, K10A60D type.
MainBoard - the main board (motherboard) is an EAX64272803 module using CPU chips: LGE2111-E8; SPI Flash: MX25L8006EM and others.
The TDSS-G101D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420WUE-SCA3
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1450: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + FRC), CIE1931 72%
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs EEFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V