Technical description and composition of the PHILIPS 42PFL4208T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL4208T / 60
Chassis / Version: TPM10.1E LA
Panel: TPT420H2-DUJFFE
LED backlight: 015B8000-A97-102-6840 V-6840-A97-20
T-CON: 6870C-0452A
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700A
MOSFET LED driver: AOTF4126
Power Supply (PSU): 715G5778-P03-W21-002M
PWM Power: R2A20133ESP (PFC), A6069H (Stb), SSC9522S (PWM),
MOSFET Power: STF8NM50N, STF24NM60N
MainBoard: 715G5713-M0E-000-005K (WK: 1239)
IC MainBoard: CPU: MT5580MPOI, DRAM: H5TQ2G83DFR, NAND Flash: TC58NVG2S3ETAI0, Audio: STA3818
Tuner: TDSY-G230D
Control: WIFI: BTC-202 B
Specifications 42PFL4208T
PHILIPS 42PFL4208T
General repair guidelines for TV LCD LED
Possible manifestations of defects
- PHILIPS 42PFL4208T does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Most often, with such manifestations, the main power module 715G5778-P03-W21-002M is found to be faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (STF8NM50N, STF24NM60N) and rectifier diodes of the converters for a short-circuit probability.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chipset (PWM) R2A20133ESP (PFC), A6069H (Stb), SSC9522S (PWM), are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 715G5713-M0E-000-005K motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MT5580MPOI, DRAM: H5TQ2G83DFR, NAND Flash: TC58NVG2S3ETAI0, Audio: STA3818 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 TDSY-G230D 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
Service manual and schematic diagram ----------------------> PHILIPS 42PFL4208T Chassis TPM10.1E LA
The appearance of the MainBoard 715G5713-M0E-000-005K is shown in the figure below:
715G5713-M0E-000-005K
715G5713-M0E-000-005K can be used in TVs:
PHILIPS 39PFL4208T/60 (Panel TPT390J1-HJ1L02 code 199), PHILIPS 42PFL3008T/60 (Panel TPT420H2-HVN04 code 194), PHILIPS 42PFL3208T/60 (Panel TPT420H2-HVN04 Rev080C code 194), PHILIPS 42PFL5028T/60 (Panel LC420EUE (FF)(F1) code 190), PHILIPS 50PFL5038T/60 (Panel LC500EUE FFF1).
The appearance of the power supply
Main features of the PHILIPS 42PFL4208T device:
The matrix (LED panel) TPT420H2-DUJFFE is installed.
The matrix control uses the Timing Controller (T-CON) 6870C-0452A.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the PF7900S, PF7700A PWM controller. As power elements of the LED driver, keys of the AOTF4126 type are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL4208T TV are generated by the power supply module 715G5778-P03-W21-002M, or its analogs using microchips R2A20133ESP (PFC), A6069H (Stb), SSC9522S (PWM), and power switches of the STF8NM50N60, STF8 type.
MainBoard - the main board (motherboard) is a 715G5713-M0E-000-005K module, using CPU chips: MT5580MPOI, DRAM: H5TQ2G83DFR, NAND Flash: TC58NVG2S3ETAI0, Audio: STA3818 and others.
The TDSY-G230D tuner provides television reception and channel tuning