Technical description and composition of the PHILIPS 47PFL9703D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 47PFL9703D / 10
Chassis / Version: Q529.1E LA
Panel: LC470WUF (SA) (C1) // LC420WUE - SAA1
T-CON: 6870C-0201C
Inverter (backlight): integrated into PSU
Power Supply (PSU): PLHL-T722A - 2300KEG033A-F, 2722171 00644
MainBoard: 3104.313.62144 - 3104.303.51024 - S310432858521
IC MainBoard: PNX8541, PNX5100, NAND512W3A2CN6E, M24C64, TPA6111A2DGN
Tuner: TD1716F / BHXP
Control: IR: 3104 313 62543
Specifications 47PFL9703D
PHILIPS 47PFL9703D
General recommendations for repairing TV LCD
Repair of the PHILIPS 47PFL9703D / 10 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. Useful tips can include swollen capacitors, ring cracks formed in the soldered terminals, a charred paint layer on the resistors, signs of overheating of the board, and many other external signs familiar to experienced repairmen.
If the power supply module PLHL-T801A (UD), PLHL-T722A (MD), 2300KEG033A-F, 2722 171 00644 080619 malfunctions, the external manifestations may be different, for example, PHILIPS 47PFL9703D does not turn on at all and there is no indication of indicator lights on the front panel. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
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 binding of the IC_Power PWM regulator chip are subject to verification, which it is desirable to verify by replacement.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. When disabling the inverter protection (to enable diagnostics), special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
On the motherboard 3104.313.62144 - 3104.303.51024 - S310432858521, 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). In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - PNX8541, PNX5100, NAND512W3A2CN6E, M24C64, TPA6111A2DGN 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).
If the TV works normally from external devices but does not tune into television channels, the TD1716F / BHXP tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention! For users and owners of 47PFL9703D TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
Service manual and schematic diagram 47PFL9703D/10 Chassis Q529.1E LA
The appearance of MainBoard 3104.313.62144 is shown in the figure below:
3104.313.62144
The appearance of the power supply
Main features of the PHILIPS 47PFL9703D device:
Installed matrix (LCD panel) LC470WUF (SA) (C1) or LC420WUE - SAA1.
The matrix control uses the Timing Controller (T-CON) 6870C-0201C.
To power the backlight, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the PHILIPS 47PFL9703D TV is carried out by the PLHL-T722A power supply module, or its analogs.
MainBoard - the main board (motherboard) is a module 3104.313.62144, using chips PNX8541, PNX5100, NAND512W3A2CN6E, M24C64, TPA6111A2DGN and others.
The TD1716F / BHXP tuner provides TV reception and channel tuning.
