Technical description and composition of the PHILIPS 42PFL4007T TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 42PFL4007T / 60
Chassis / Version: Q552.4E LA
Panel: LC420EUE (SE) (M2)
LED backlight: 6922L-0016A V1B RIGHT 42 V12 Edge REV1.1 1 6920L-0001C
T-CON: 6870C-0401B
LED driver (backlight): integrated into PSU
Power Supply (PSU): 715G5246-P01-000-002S
PWM Power: R2A20113 (PFC), SSC9522S (PWM resonant), A6069H (Standby 8pin)
MainBoard: 65323V2 - MB 65333V2 - SB
IC MainBoard: CPU: PNX85500; NAND Flash: H27U4G8F2D; SPI Flash: M25P05; SOUND: TAS5731PHP
Tuner: SUT-RE214Z
Control: Remote: 2422 549 90467
Specifications 42PFL4007T
PHILIPS 42PFL4007T
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The PHILIPS 42PFL4007T does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
With similar manifestations, in some cases, the 715G5246-P01-000-002S power module is faulty. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM circuits (PWM) R2A20113 (PFC), SSC9522S (PWM resonant), A6069H (Standby 8pin) are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 65323V2 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB board (SSB), you need to check the health of its elements - CPU: PNX85500; NAND Flash: H27U4G8F2D; SPI Flash: M25P05; SOUND: TAS5731PHP which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
The malfunction of the SUT-RE214Z tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Owners and users of the PHILIPS 42PFL4007T TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram Chassis Q552.4E LA
The appearance of the MainBoard 65323V2 is shown in the figure below:65323V2
65323V2 can be used in TVs:
PHILIPS 40PFL5537T/60 (Panel LTA400HV04), PHILIPS 42PFL4007T/60 (Panel LC420EUE (SE)(M2)).
The appearance of the power supply
Main features of the PHILIPS 42PFL4007T device:
Installed matrix (LED-panel) LC420EUE (SE) (M2).
The matrix control uses the Timing Controller (T-CON) 6870C-0401B.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the PHILIPS 42PFL4007T TV are generated by the 715G5246-P01-000-002S power module, or its analogs using the R2A20113 (PFC), SSC9522S (PWM resonant), A6069H (Standby 8pin) microcircuits.
MainBoard - the main board (motherboard) is a module 65323V2, using CPU chips: PNX85500; NAND Flash: H27U4G8F2D; SPI Flash: M25P05; SOUND: TAS5731PHP and others.
The SUT-RE214Z tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUE-SEM2
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 (3H)
Brightness: 400 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: 6 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V