Technical description and composition of the PHILIPS 42PFL6877T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL6877T / 60
Chassis / Version: QFU2.1E LA
Panel: LC420EUF (FE) (P1)
LED backlight: 6922L-0030A, 42 ART TV REV 0.6 1 L-TYPE / R-TYPE 6920L-0001C, 6916L0892A, 6916L0893A
T-CON: 6870C-0402C
LED driver (backlight): DPS-119CP A 272217190582 REV00
PWM LED driver: DDA009 (24pin)
Power Supply (PSU): DPS-119CP A 272217190582 REV00
PWM Power: DDA010 (Standby), NCP1608B (PFC), 2QS02G, Q1211 (8PIN)
MainBoard: 310431365664 310432868323 3104 313 65664 3104 328 68323 UC 225.4 AI1.A 310432868342
IC MainBoard: FUSION120, H5TQ2G83BFR, H26M21001ECR, TAS5731P1
Tuner: SUT-RE214AN
Control: TVRC61312 / 12 242254990522 YKF316-Z01
Specifications 42PFL6877T
PHILIPS 42PFL6877T
General repair guidelines for TV LCD LED
PHILIPS 42PFL6877T / 60, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In the absence of any signs of operability, when the PHILIPS 42PFL6877T does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the power supply module DPS-119CP A 272217190582 REV00 of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the PHILIPS 42PFL6877T does not have an image, but there is sound, the backlight LEDs of the LC420EUF FEP1 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
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.
Diagnostics and repair of the motherboard UC 225.4 AI1.A 310432868342 is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual and schematic diagram 42PFL6877T/60 Chassis QFU2.1E LA
Chassis QFU2.1E LA FOR MODELS:
32PFL6007H/12, 32PFL6007K/12, 32PFL6007T/12, 32PFL6087H/12, 32PFL6087K/12, 32PFL6087T/12
37PFL6007H/60, 37PFL6007H/12, 37PFL6007K/12, 37PFL6007T/12, 37PFL6777H/12, 37PFL6777K/12
42PDL6907H/12, 42PDL6907K/12, 42PDL6907T/12, 42PFL6007H/12/60, 42PFL6007K/12, 42PFL6007T/12/60, 42PFL6057H/12/60, 42PFL6057K/12, 42PFL6057T/12/60, 42PFL6067H/12/60, 42PFL6067K/12, 42PFL6067T/12/60, 42PFL6097H/12/60, 42PFL6097K/12, 42PFL6097T/12/60, 42PFL6687H/12/60, 42PFL6687K/12, 42PFL6687T/60, 42PFL6877H/12/60, 42PFL6877K/12, 42PFL6877T/12/60
47PDL6907H/12, 47PDL6907K/12, 47PDL6907T/12, 47PFL6007H/12/60, 47PFL6007K/12, 47PFL6007T/12/60, 47PFL6057H/12/60, 47PFL6057K/12, 47PFL6057T/12/60, 47PFL6067H/12/60, 47PFL6067K/12, 47PFL6067T/12/60, 47PFL6097H/12/60, 47PFL6097K/12, 47PFL6097T/12/60, 47PFL6687H/12/60, 47PFL6687K/12, 47PFL6687T/60, 47PFL6877H/12/60, 47PFL6877K/12, 47PFL6877T/12/60
55PFL6007H/12, 55PFL6007K/12, 55PFL6007T/12, 55PFL6097H/12, 55PFL6097K/12, 55PFL6097T/12
The appearance of MainBoard 310431365664 is shown in the figure below:
310431365664
310431365664 can be used in TVs:
PHILIPS 32PFL6007T/12 (Panel LC320EUF FEP1 code 423), PHILIPS 32PFL6008T/60 (Panel LC320EUF (FE)(P1) code 423), PHILIPS 32PFL6087T/12 (Panel LC320EUF (FE)(P1)), PHILIPS 32PFL6087T/12 (Panel LC320EUF FE P1), PHILIPS 42PFL6007T/60 (Panel LC420EUF (FE)(P1)), PHILIPS 42PFL6057T/60 (Panel LC420EUF FC P1), PHILIPS 42PFL6097T/60 (Panel LC420EUF (FE)(P1) code 322 p/n: 932228895682), PHILIPS 42PFL6877T/60 (Panel LC420EUF (FE)(P1)), PHILIPS 47PFL6057T/60 (Panel LC470EUF FE P1 (LG/PH) B code 323 p/n: 932228896682), PHILIPS 47PFL6097T/60 (Panel LC470EUF (FE)(P1)), PHILIPS 47PFL6877T/60 (Panel LC470EUF FE P1), PHILIPS 55PFL6007T/12 (Panel C550EUF (FE)(P1)), PHILIPS 60PFL9607T/12 (Panel LK600D3LB63 (SRJ)), PHILIPS 42PFL6067T/12 (Panel LC420EUF (FE)(P1)), PHILIPS 47PFL6007K/12 (Panel LC470EUF (FE)(P1)).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-119CP module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the NCP1608B PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering was applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 42PFL6877T device:
Installed matrix (LED-panel) LC420EUF (FE) (P1).
The matrix control uses the Timing Controller (T-CON) 6870C-0402C.
The LED driver DPS-119CP is used to power the backlight LEDs, it is controlled by the DDA009 PWM controller (24pin).
The necessary supply voltages for all nodes of the PHILIPS 42PFL6877T TV are generated by the DPS-119CP power module or its analogs using DDA010 (Standby), NCP1608B (PFC), 2QS02G, Q1211 (8PIN) microcircuits.
MainBoard - the main board (motherboard) is a module 310431365664, using chips FUSION120, H5TQ2G83BFR, H26M21001ECR, TAS5731P1 and others.
The SUT-RE214AN tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUF-FEP1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 1%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V