Technical description and composition of the LG 32CS460T TV, panel type and applicable modules. The composition of the modules.LG
Model: 32CS460T
Chassis / Version: LD21C / LC21B
Panel: LC320WXN (SC) (A4)
T-CON: LC320WXN-SCA2, LG5804B, TPS65163
Inverter (backlight): PNEC-D032A REV-0,1
PWM Inverter: OZ9966SN
MOSFET Inverter: 2SD4184
Power Supply (PSU): EAX64604501 LGP32-12P
PWM Power: L6599AD (PWM Resonant), HS01G (PFC), FSL106HR (Standby DIP-8)
MOSFET Power: K10A60D, TK7P60V
MainBoard: EAX64664903 (1.0)
IC MainBoard: LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, Z105NP, AP7173
Tuner: TDSN-G301D
Control: Remote: AKB73655802
Appearance
LG 32CS460T
General recommendations for repairing TV LCD
LG TV, made on the LD21C / LC21B chassis, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Using visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Failures of the LGP32-12P P / N EAX64604501 power supply module can be expressed in different ways, for example, the LG 32CS460T does not turn on at all and the control lights on its front panel do not light up and do not blink, and there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the K10A60D, TK7P60V converter.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip L6599AD, HS01G, FCL106HR may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the LG 32CS460T TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR. 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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, Z105NP, AP7173 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).
Attention! Users and owners of 32CS460T TVs who do not have the appropriate qualifications, knowledge and experience are strongly advised against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC MANUAL -----------------------> LG 32CS460/460S/460T/463/465, 32CS460-ZA/460S-ZA/460T-ZA/463-ZA/465-ZA Chassis LD21C.
Power supply circuit-------------------------> LGP32-12P EAY62769501 EAX64604501 Power supply.
The appearance of the MainBoard EAX64664903 is shown in the figure below:EAX64664903
EAX64664903 can be used in TVs:
LG 32CS460T (Panel LC320WXN (SC)(A4)), LG 42LS3400 (Panel LC420DUN (SE)(R2)), LG 32LS3400 ZC (Panel LC320DXN (SE)(R2)), LG 32LS3500 (Panel LC320EXN (SE)(A2)), LG 32CS466 (Panel LC320WXN (SC)(A4)), LG 32LS3590 32LS3590-ZC.BRUDLJU (Panel T320XVN01.1), LG 32LS359T (Panel LC320EXN (SE)(A2)), LG 42CS460T 42CS460T-ZA (Panel LC420WUE (SC)(A3)).
PSU Advanced
The 32CS460T is equipped with an EAX64604501 power module using the PFC (Power Factor Correction) circuitry, which acts as an active filter to eliminate the higher harmonic components of the current consumption. The step-up converter based on the HS01G PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes when the charge current is determined by its reactance (of the order of 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the device LG 32CS460T:
Installed matrix (LCD panel) LC320WXN (SC) (A4).
The matrix control uses the Timing Controller (T-CON) LC320WXN-SCA2.
The PNEC-D032A inverter is used to power the backlight, it is controlled by the OZ9966SN PWM controller. As power elements of the inverter, keys of the type 2SD4184 are used.
The necessary supply voltages for all nodes of the LG 32CS460T TV are generated by the EAX64604501 power module or its analogs using L6599AD (PWM Resonant), HS01G (PFC), FSL106HR (Standby DIP-8) microcircuits and power switches of the K10A60D, TK7P60V type.
MainBoard - the main board (motherboard) is an EAX64664903 module using LGE2111A-T8, K4B1G1646G-BCKO, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, Z105NP, AP7173 and other chips.
The TDSN-G301D tuner provides television reception and channel tuning.
Information from an alternative source:
LG 32CS460T chassis LD21C
Panel Type (Matrix): LC320WXN,
Motherboard: EAX64664903 (1.0), LGE2111A-T8, K4B1G1646G-BCKO x2, STA3808 WE, AS324M, 25080 BVSIG, TJ3940, LCX244, 4HA7, Z105NP, AP7173, 54319, Tuner: TDSN-G01
T-con: LC320WXN-SCA2, LG5804B, TPS65163
Invertor: PNEC-D032A REV-0,1, OZ9966SN, 2SD4184 x4
PSU: LGP32-12P P / N EAX64604501 (1.5), L6599AD, SSC1S311, FSL106HR, TK7P60V x2, K10A60D Chassis diagram LD21C
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
