Technical description and composition of the PHILIPS 42PFT5609 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFT5609 / 60
Chassis / Version: TPM14.1E LA
Panel: LC420DUN (PG) (A1)
LED backlight: 42 V14 DRT Rev0.0 = L1 / L2 / R1 / R2-Type
T-CON: 6870C-0469A
LED driver (backlight): KPW-LE42FC-O A REV0.1 6917L-0151C
PWM LED driver: TPS61197
Power Supply (PSU): 715G6353-P01-000-002H
PWM Power: LD7591T (PFC), SSC1S311 (PWM)
MainBoard: 715G6165-M01-000-005K
IC MainBoard: CPU: MT5580PUEI; DRAM: K4B4G1646B-HCK0; NAND Flash: TC58NVG2S3ETAI0; SPI Flash: CAT24C128WI
Tuner: TDSY-G720D
Control: 996590009748, Wi-Fi: 8WUSN24V.3A1G
Specifications 42PFT5609
PHILIPS 42PFT5609
General repair guidelines for TV LCD LED
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, and there is not the slightest sign of operability - the most likely malfunction is in the power module. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should begin by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller LD7591T (PFC), SSC1S311 (PWM), which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the PHILIPS 42PFT5609 does not have an image, there is sound and the channels switch, there is a possibility of a malfunction in the backlight LED circuit of the LC420DUN (PG) panel (A1), or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the backlight unit.
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. 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.
If the motherboard 715G6165-M01-000-005K is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement.
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: MT5580PUEI; DRAM: K4B4G1646B-HCK0; NAND Flash: TC58NVG2S3ETAI0; SPI Flash: CAT24C128WI and other possible malfunctioning components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the TDSY-G720D tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
We recommend the owners of the 42PFT5609 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagram 42PFT5609/60 Chassis TPM14.1E LA
The appearance of the MainBoard 715G6165-M01-000-005K is shown in the figure below:715G6165-M01-000-005K
715G6165-M01-000-005K can be used in TVs:
PHILIPS 42PFT6309 / 60 (Panel LC420DUN (PG) (P1) CODE 106), PHILIPS 42PFT6569 / 60 (Panel LC420DUN (PG) (A1)), PHILIPS 47PFT6309 / 60 (Panel LC470DUN (PG) (P1) code 107), PHILIPS 42PFT5609 / 60 (Panel LC420DUN (PG) (A1)).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the 715G6353-P01-000-002H module provides for the use of the Power Factor Correction unit. The PFC circuit is a flyback converter based on the LD7591T 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 were 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 42PFT5609 device:
Installed matrix (LED-panel) LC420DUN (PG) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0469A.
To power the backlight LEDs, the KPW-LE42FC-O LED driver is used, controlled by the TPS61197 PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 42PFT5609 television are generated by the 715G6353-P01-000-002H power supply module or its analogs using the LD7591T (PFC), SSC1S311 (PWM) microcircuits.
MainBoard - the main board (motherboard) is a 715G6165-M01-000-005K module, using CPU chips: MT5580PUEI; DRAM: K4B4G1646B-HCK0; NAND Flash: TC58NVG2S3ETAI0; SPI Flash: CAT24C128WI and others.
The TDSY-G720D tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC420DUN-PGA1
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
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V