Technical description and composition of the LG 32CS461 TV, panel type and applicable modules. The composition of the modules.LG
Model: 32CS461
Chassis / Version: LB21B
Panel: LC320WXN (SC) (A4)
MainBoard: EAX64437505 (1.0)
IC MainBoard: CPU: LGE2111A-T8, DDR: H5TQ1G63DFR-H9C, Nand: NAND01GW3B2CN6E, SPI Flash: W25Q80
Tuner: TDSS-G201D
Appearance
LG 32CS461
General recommendations for repairing TV LCD
Repair and diagnostics of any electronic device, in particular LG with the LB21B chassis, it is advisable to start with a careful external examination of internal and external elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the soldered terminals of transformers or heating elements are detected, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
If the LG 32CS461 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In some cases, only the processor power regulator may be faulty. 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 broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
In cases where the LG 32CS461 TV has lost an image, and the sound is there and all the other functions are functional, 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. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
Diagnosis and repair of the EAX64437505 motherboard (1.0) is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required. Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: LGE2111A-T8, DDR: H5TQ1G63DFR-H9C, Nand: NAND01GW3B2CN6E, SPI Flash: W25Q80 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.
Owners and users of the LG 32CS461 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 MANUAL -----> LG CHASSIS LB21C, 32CS460/460Y/461/470, 32CS460/460Y/470-TA, 32CS461-TB
Main features of the device LG 32CS461:
Installed matrix (LCD panel) LC320WXN (SC) (A4).
The necessary supply voltage for all nodes of the TV LG 32CS461 provides a switching power supply.
MainBoard - the main board (motherboard) is an EAX64437505 module, using CPU chips: LGE2111A-T8, DDR: H5TQ1G63DFR-H9C, Nand: NAND01GW3B2CN6E, SPI Flash: W25Q80 and others.
The TDSS-G201D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXN-SCA4
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: 450 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V