Technical description and composition of the PHILIPS 42PFT6309 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFT6309 / 60
Chassis / Version: TPN14.1E LA
Panel: LC420DUN (PG) (P1) CODE 106
LED backlight: 42 V14 DRT Rev0.0 1 L1 / L2 / R1 / R2-Type
T-CON: 6870C-0469A
LED driver (backlight): PPW-LE42FC-0 rev0.1 6917L-0115B // 6917L-0151B
PWM LED driver: TPS61197
MOSFET LED driver: KF4N20LW, FDD390N15A
Power Supply (PSU): 715G6353-P01-000-002H // 715G6353-P01-001-002H
PWM Power: LD7591T (PFC), SSC1S311 (PWM)
MOSFET Power: TK15A60U (PFC), TK13A65U
MainBoard: 715G6165-M01-000-005K / 715G6165-M01-000-005X
IC MainBoard: CPU: MT5580PUEI; DRAM: K4B4G1646B-HCK0; NAND Flash: TC58NVG2S3ETAI0; SPI Flash: CAT24C128WI
Tuner: TDSY-G720D
Control: IR: GWA7.820.809-2 (V0.2), Wi-Fi: 8WUSN24V.3A1G
Specifications 42PFT6309
PHILIPS 42PFT6309
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs PHILIPS 42PFT6309 / 60, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. 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.
If the 42PFT6309 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink, there is a high probability of a malfunction in the power supply module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some PHILIPS models. 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.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the PHILIPS 42PFT6309 TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the LC420DUN PG P1 panel is likely. 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 excessive ESR.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It is necessary to disassemble the panel and check the LEDs themselves, the soldering of their conclusions, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements 715G6165-M01-00-005X. BGA chip malfunctions are usually easy to detect by warming up.
Owners and users of the PHILIPS 42PFT6309 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!
Service manual and schematic diagram 42PFT6309/60 Chassis TPN14.1E LA
The appearance of the MainBoard 715G6165-M01-000-005K is shown in the figure below:715G6165-M01-000-005K
715G6165-M01-000-005K can be used in TVs:
PHILIPS 42PFT6309/60 (Panel LC420DUN (PG)(P1) CODE 106), PHILIPS 42PFT6569/60 (Panel LC420DUN (PG)(A1)), PHILIPS 47PFT6309/60 (Panel LC470DUN (PG)(P1) code 107), PHILIPS 42PFT5609/60 (Panel LC420DUN (PG)(A1)).
PSU Advanced
The 42PFT6309 / 60 TV is equipped with a 715G6353-P01-000-002H power module using the PFC (Power Factor Correction) circuitry, which acts as an active filter to eliminate higher harmonic components of the current consumption. The boost converter based on the LD7591T 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 determines 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 PHILIPS 42PFT6309 device:
Installed matrix (LED-panel) LC420DUN (PG) (P1) CODE 106.
The matrix control uses the Timing Controller (T-CON) 6870C-0469A.
The LED driver PPW-LE42FC-0 is used to power the backlight LEDs, it is controlled by the TPS61197 PWM controller. As power elements of the LED driver, keys of the type KF4N20LW, FDD390N15A are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFT6309 television are generated by the power supply module 715G6353-P01-000-002H or its analogs using microcircuits LD7591T (PFC), SSC1S311 (PWM) and power switches of the type TK15A60U (PFC), TK13A65U.
MainBoard - the main board (motherboard) is a 715G6165-M01-000-005K module, using CPU chips: MT5580PUEI; DRAM: K4B4G1646B-HCK0; NAND Flash: TC58NVG2S3ETAI0; SPI Flash: CAT24C128WI and others.
The TDSY-G720D tuner allows you to receive television programs and tune to channels.