Technical description and composition of the PHILIPS 42PFL7762D TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 42PFL7762D / 12
Chassis / Version: LC7.5E LA
Panel: T420HW01 V.2
T-CON: T420HWO1 V2 CONTROL BOARD 07A33-1A
Inverter (backlight): VIT71043.50 LOGAH REV.2, VIT71043.51 S LOGAN REV.2
PWM Inverter: OZ964SN
MOSFET Inverter: P2504EDG, P1504BDG
Power Supply (PSU): PLCD300P3 3122 423 31942
PWM Power: TEA1601T (16), TEA1533AT (14), L6562D (PFC)
MOSFET Power: 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP
MainBoard: WK718.5 3139 123 62711V3 LC07S
IC MainBoard: M30300SAGP, SVP WX68-7568
Tuner: Tuner
Specifications 42PFL7762D
PHILIPS 42PFL7762D
General recommendations for repairing TV LCD
Possible malfunctions
- The PHILIPS 42PFL7762D TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In such cases, the fault should be sought first in the PLCD300P3 power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP) and rectifier diodes in the converters for a short circuit.
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 chips TEA1601T (16), TEA1533AT (14), L6562D (PFC) are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the WK718.5 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). When repairing an MB board, it is necessary to check its components M30300SAGP, SVP WX68-7568. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally with external devices but does not tune into television channels, the Tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, remind users! Attempts to self-repair a PHILIPS 42PFL7762D TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram 42PFL7762D/12 Chassis LC7.5E LA
FOR MODELS: 32PFL7962D, 42PFL7962D, 32PFL7762D, 42PFL7762D, 52PFL7762D
The appearance of the MainBoard WK718.5 is shown in the figure below:WK718.5
The appearance of the power supply
Main features of the PHILIPS 42PFL7762D device:
Installed matrix (LCD-panel) T420HW01 V.2.
The matrix control uses the Timing Controller (T-CON) T420HWO1.
The VIT71043.50 inverter is used to power the backlight lamps, it is controlled by the OZ964SN PWM controller. As power elements of the inverter, keys of the type P2504EDG, P1504BDG are used.
The required supply voltages for all nodes of the PHILIPS 42PFL7762D TV are generated by the PLCD300P3 power supply module or its analogs using TEA1601T (16), TEA1533AT (14), L6562D (PFC) microcircuits and power switches of the type 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP, P6NK60ZFP.
MainBoard - the main board (motherboard) is a WK718.5 module, using the chips M30300SAGP, SVP WX68-7568 and others.
The Tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T420HW01 V2
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 15/5 (Tr / Td); 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
