Technical description and composition of the PHILIPS 42PFL7606H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL7606H / 60
Chassis / Version: Q552.2E LA
Panel: LC420EUF (SD) (F2) code 385
LED backlight: 3660L-0374A 12 42 V6 Edge FHD-1 Rev1.0 R-Type / L-Type
T-CON: 6870C-0358A VER 1.0
LED driver (backlight): integrated into PSU
PWM LED driver: DDA009
Power Supply (PSU): DPS-139AP, DPS-186FP
PWM Power: NCP1608B (PFC), S101, DDA010 (= ICE2QR0665 Standby), 2QS02G
MainBoard: 313929714961
IC MainBoard: PNX85537, ST1S10PH ST1S10B (8), TPA3123D2, TPS53126PW
Tuner: TH2603
Control: IR: GWA7.820.697-1 (V0.6)
Specifications 42PFL7606H
PHILIPS 42PFL7606H
General repair guidelines for TV LCD LED
Repair of the PHILIPS 42PFL7606H / 60 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the absence of any signs of operability, when the PHILIPS 42PFL7606H 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 DPS-139AP, DPS-186FP power supply module of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
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 DDA010 PWM controller chip itself may be faulty (8). It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If there is no image when you turn on the PHILIPS 42PFL7606H, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LC420EUF (SD) (F2) code 385, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
The motherboard 313929714961 is subject to verification if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
When repairing an MB board, you must check its components ST1S10PH ST1S10B (8), TPA3123D2, TPS53126PW. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
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 33929714971, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
Attention to users! Do-it-yourself TV repair PHILIPS 42PFL7606H without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 42PFL7606H/60 Chassis Q552.2E LA
FOR MODELS: 32PFL6606H/12, 32PFL6606H/60, 32PFL6606K/02, 32PFL6606M/08, 32PFL6626H/12, 32PFL6626K/02, 32PFL6626M/08, 32PFL6636H/12, 32PFL6636K/02, 32PFL6636M/08, 32PFL7406H/12, 32PFL7406K/02, 32PFL7406M/08, 32PFL7476H/12, 32PFL7476K/02, 32PFL7486H/12, 32PFL7486K/02, 32PFL7486M/08, 32PFL7496H/12, 32PFL7496K/02, 37PFL6606H/12, 37PFL6606H/60, 37PFL6606K/02, 37PFL6606M/08 , 40PFL6606H/12, 40PFL6606H/60, 40PFL6606K/02, 40PFL6606M/08, 40PFL6626H/12, 40PFL6626K/02, 40PFL6626M/08, 40PFL6636H/12, 40PFL6636K/02, 40PFL6636M/08, 42PFL7406H/12, 42PFL7406K/02, 42PFL7406M/08, 42PFL7456H/12, 42PFL7456K/02, 42PFL7456M/08 , 42PFL7486H/12, 42PFL7486K/02, 42PFL7486M/08, 42PFL7606H/12, 42PFL7606K/02, 42PFL7606M/08, 42PFL7666H/12, 42PFL7666K/02, 42PFL7676H/12, 42PFL7676K/02, 42PFL7696H/12, 42PFL7696M/08, 46PFL6606H/12, 46PFL6606H/60, 46PFL6606K/02, 46PFL6606M/08, 46PFL6626H/12, 46PFL6626K/02, 47PFL7606H/12, 47PFL7606K/02, 47PFL7606M/08, 47PFL7666H/12, 47PFL7666K/02, 47PFL7696H/1, 47PFL7696K/02, 47PFL7696M/08, 55PFL6606H/12, 55PFL6606H/60, 55PFL6606K/02, 55PFL6606M/08.
The appearance of MainBoard 313929714961 is shown in the figure below:313929714961
313929714961 can be used in TVs:
PHILIPS 42PFL7606H/60 (Panel LC420EUF (SD)(F2) code 385), PHILIPS 47PFL7606H/60 (Panel LC470EUF (SD)(F2)).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-139AP 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 42PFL7606H device:
Installed matrix (LED-panel) LC420EUF (SD) (F2) code 385.
The matrix control uses the Timing Controller (T-CON) 6870C-0358A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the DDA009 PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 42PFL7606H TV are generated by the DPS-139AP power module or its analogs using NCP1608B (PFC), S101, DDA010 (= ICE2QR0665 Standby), 2QS02G microcircuits.
MainBoard - the main board (motherboard) is a module 313929714961, using chips PNX85537, ST1S10PH ST1S10B (8), TPA3123D2, TPS53126PW and others.
The TH2603 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUF-SDF2
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 10%), 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: 5.5 (Typ.) (G to G); 6 (MPRT)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V