Technical description and composition of the PHILIPS 40PFL6605H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFL6605H / 60
Chassis / Version: Q552.1E LA
Panel: LK400D3LA93
LED backlight: K4475CS-MP, K4476CS-MP
LED driver (backlight): integrated into PSU
PWM LED driver: DDA002C, DDA003A
Power Supply (PSU): DPS-199DP
PWM Power: ICE3BS3LJ, NCP1608B (PFC), DDA002B
MainBoard: 3104_313_63644 - S 310432861943
IC MainBoard: TPA3123D2, E1108AGBG, HY27UF084G2B
Tuner: TH2624
Control: IR: GWA7.820.675-2 (HT)
Specifications 40PFL6605H
PHILIPS 40PFL6605H
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the PHILIPS 40PFL6605H / 60 TV, as well as the external elements of the case. Often by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases when the PHILIPS 40PFL6605H TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the DPS-199DP power supply module is most likely faulty or missing processor power on the motherboard (a typical defect of some PHILIPS TVs). Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip may also cause a breakdown of the power switch of the converter.
If there is no image when you turn on the PHILIPS 40PFL6605H, 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 LK400D3LA93 panel, 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 detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
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).
In cases where there is no tuning to the local television channels, you should make sure that there is a varicap supply voltage (30-33V) and other supply voltages at the terminals of the tuner 310432861941.
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 40PFL6605H/60 Chassis Q552.1E LA
The appearance of MainBoard 3104_313_63644 is shown in the figure below:3104_313_63644
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-199DP 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 40PFL6605H device:
Installed matrix (LED-panel) LK400D3LA93.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a PWM controller DDA002C, DDA003A.
The necessary supply voltages for all nodes of the PHILIPS 40PFL6605H TV are generated by the DPS-199DP power module or its analogs using ICE3BS3LJ, NCP1608B (PFC), DDA002B microcircuits.
MainBoard - the main board (motherboard) is a 3104_313_63644 module, using TPA3123D2, E1108AGBG, HY27UF084G2B and other chips.
The TH2624 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SHARP
Model: LK400D3LA93
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: ASV, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit)
Response Time: 6 (G to G)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V