Technical description and composition of the PHILIPS 42PFL3208T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL3208T / 60
Chassis / Version: TPM10.1E LA
Panel: TPT420H2-HVN04 Rev080C code 194 // LTA400HL23 code 197
LED backlight: AD080 (66) -079 EVERLIGHT LBM420P0601-CA-3 (HF) (0), LBM420P0501-CB-4 (HF) (0)
T-CON: 50T10-C00 T500HVD02.0
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700A
Trans LED driver: 380QL32P111T
Power Supply (PSU): 715G5778-P02-000-002M 996590004081
PWM Power: SSC9522S (PWM Resonant), R2A20133ESP (PFC), A6069H (Standby)
MainBoard: 715G5713-M0E-000-005K 996590004723
IC MainBoard: CPU: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818
Tuner: TDSY-G230D
Control: Remote: 2422 549 90467, IR: 715G5772-R01-000-004S
Specifications 42PFL3208T
PHILIPS 42PFL3208T
General repair guidelines for TV LCD LED
PHILIPS 42PFL3208T / 60, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. Visible damage to the elements can sometimes indicate the direction of the search for the defect even before the necessary measurements. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If PHILIPS 42PFL3208T does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power supply module 715G5778-P02-000-002M 996590004081 malfunctioning. In some cases, only the processor power regulator may be faulty. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If PHILIPS 42PFL3208T has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the TPT420H2-HVN04 Rev080C panel code 194 996590003938, or their power converter is an LED driver. 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 LED driver itself, including in the secondary rectifier of the main PSU.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
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).
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner TDSY-G230D, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
Attention! For users and owners of 42PFL3208T 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-repairability of the device.
SCHEMATIC MANUAL ----------------> 42PFL3208T/60 Chassis TPM10.1E LA part1, part2, part3
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).
PSU Advanced
The 42PFL3208T / 60 model uses a 715G5778-P02-000-002M 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 boost converter based on the R2A20133ESP PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor from the network directly through the 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.
The appearance of the power supply
Main features of the PHILIPS 42PFL3208T device:
Installed matrix (LED panel) TPT420H2-HVN04 Rev080C code 194 or LTA400HL23 code 197.
The matrix control uses the Timing Controller (T-CON) 50T10-C00.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the PF7900S, PF7700A PWM controller. The transformer 380QL32P111T is installed in the LED driver converter.
The necessary supply voltages for all nodes of the PHILIPS 42PFL3208T TV are generated by the 715G5778-P02-000-002M power supply module or its analogs using SSC9522S (PWM Resonant), R2A20133ESP (PFC), A6069H (Standby) microcircuits.
MainBoard - the main board (motherboard) is a 715G5713-M0E-000-005K module, using CPU chips: MT5580MPOI; DRAM: H5TQ2G83DFR; NAND Flash: TC58NVG2S3ETAI0; SOUND: STA3818 and others.
The TDSY-G230D tuner provides TV reception and channel tuning.