Technical description and composition of the TV SHARP LC-32D44E-GY, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32D44E-GY
Panel: 32 inch
Inverter (backlight): RUNTKA396WJN1
PWM Inverter: BD9883, LM2903, Z1358
MOSFET Inverter: K4096, K3599
Power Supply (PSU): RUNTKA396WJN1
PWM Power: TNY276PN, FA5500A (PFC)
MOSFET Power: 5500A, K4087
MainBoard: QPWBXE449WJN
IC MainBoard: LVX4053, Si19025CTV, VHC153847, YDA147-S, FS94AUG-6NU2, STV0362, BD8143, T3Z18AFG-003, 4256, 20WZ51
Tuner: TDAG4-B03A
Technical Specifications LC-32D44RU
SHARP LC-32D44E-GY
General recommendations for repairing TV LCD
TV SHARP LC-32D44E-GY, like any other, it is advisable to start repairing with an examination of the internal and external visible physical visual changes. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. 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 SHARP LC-32D44E-GY TV simply 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 the failure of the common power module RUNTKA396WJN1. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. If it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor 5500A K4087.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller TNY276PN, which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the SHARP LC-32D44E-GY does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair or diagnostics of the QPWBXE449WJN motherboard should be started by checking the power conditioners. If necessary, you should update the software (software). In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - LVX4053, Si19025CTV, VHC153847, YDA147-S, FS94AUG-6NU2, STV0362, BD8143, T3Z18AFG-003, 4256, 20WZ51.
If there is no reception of television channels, but the TV works properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner TDAG4-B03A, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
Attention to the owners! Attempts at self-repair of the SHARP LC-32D44E-GY TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / schematic diagram --------------> Sharp LC-32D44E-BK, LC-32D44S-BK, LC-32D44RU-BK, LC-32D44E-GY, LC-32D44S-GY, LC-32D44RU-GY
The appearance of the MainBoard CMF111B is shown in the figure below:CMF111B
CMF111B can be used in TVs:
SHARP LC-26AD5RU-BK (Panel LK255T3LZ5AZ), SHARP LC-32AD5RU-BK (Panel LK315T3LZ5CZ LK315T3LZ93), TOSHIBA 32W300P 32W300Ps (Panel LC320W01 (SL)(22) ).
PSU Advanced
The model LC-32D44E-GY uses the RUNTKA396WJN1 power supply unit using the PFC (Power Factor Correction) node - an active filter of higher harmonics of the consumed current. In fact, it is a step-up converter based on the FA5500A 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.
Main features of the SHARP LC-32D44E-GY device:
Installed matrix (LCD-panel) 32 inches.
To power the backlight, an RUNTKA396WJN1 inverter is used, it is controlled by the BD9883, LM2903, Z1358 PWM controller. As power elements of the inverter, keys of the type K4096, K3599 are used.
The necessary supply voltages for all nodes of the SHARP LC-32D44E-GY TV are generated by the RUNTKA396WJN1 power module or its analogs using TNY276PN, FA5500A (PFC) microcircuits and power switches of the 5500A, K4087 type.
MainBoard - the main board (motherboard) is a QPWBXE449WJN module, using LVX4053, Si19025CTV, VHC153847, YDA147-S, FS94AUG-6NU2, STV0362, BD8143, T3Z18AFG-003, 4256, 20WZ51 microcircuits.
The TDAG4-B03A tuner provides television reception and channel tuning.
Information from an alternative source:
Sharp LC-32D44E-GY
Motherboard: QPWBXE449WJN $, IC203 - LVX4053, IC1951 - Si19025CTV, IC1941 - VHC153847, IC2701 - YDA147-S, IC3051 - S64, IC1702 - U5805, IC1701 - M33, IC1726 - 20WZ51, IC1735, 1745 - V5805, IC2302 - FS94AUG- 6NU2, IC902 - 24C02, IC4202 - 070XNA1, IC207 - STV0362, IC8101 - 4256, IC8103 - T3Z18AFG-003, IC8201 - BD8143 -, IC1756 - 185, IC1725 - IR50, IC8401 - U04, IC8402 - BD8162308B216302 - TDAG4-B03A
PSU & Invertor: RUNTKA396WJN1, IC7101 - TNY276PN, IC7102 - 5500A, IC7501 - BD9883, IC7502 - 17809, IC7503 - 2903, Q7105 - K4087, Q7112, 7115 - K4096, Q7502, 7504 - K59999, 7504 - K3599