Technical description and composition of the PHILIPS 42PFL7782D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL7782D / 12
Chassis / Version: LC7.5E LA
Panel: T420HW01 V.2
Lamp backlight: 18 Lamp CCFL
T-CON: T420HW01 V2 Control BD; AUO-024, AS15-F, W9412G2CB-6
Inverter (backlight): Master: VIT71053.50, Slave: VIT71053.51
PWM Inverter: OZ964SN
MOSFET Inverter: P1504BDG, P2504EDG
Power Supply (PSU): PLCD300P3 24573
PWM Power: L6562D, TEA1601T, TEA1533AT
MOSFET Power: 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP
MainBoard: 3139-123-62731 3139 123 62731 wk720.4
IC MainBoard: SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T
Tuner: UV1318S / AIH-3
Control: IR: WK632.5
Specifications 42PFL7782D
PHILIPS 42PFL7782D
General recommendations for repairing TV LCD
Possible manifestations of defects
- PHILIPS 42PFL7782D does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Typically, with such manifestations, the defect is caused by faulty elements in the PLCD300P3 main power module. Then we recommend measuring its output voltages and, if they are absent, you should check the health of the power switches (2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP) and rectifier diodes of the converters for possible 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.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) L6562D, TEA1601T, TEA1533AT, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, 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 they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the motherboard 3139-123-62731 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 complex repairs of MB (SSB) and with the necessary skills and equipment, sometimes it may be necessary to replace its chips SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner UV1318S / AIH-3 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.
Owners and users of the PHILIPS 42PFL7782D 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 42PFL7782D/12 Chassis LC7.5E LA
The appearance of MainBoard 3139-123-62731 is shown in the figure below:3139-123-62731
3139-123-62731 can be used in televisions:
PHILIPS 32PFL7762D/12 (Panel LC320W01-SLB1 code 116), PHILIPS 32PFL7782D/12 (Panel V315B1-L05 Rev.C1 code 069), PHILIPS 32PFL7962D/12 (Panel V315B1-L05 code 116 or 069 p/n: 932225393682), PHILIPS 42PFL7962D/12 (Panel T420HW01 V.2 code 110), PHILIPS 32PFL7772D/12 (Panel LC320W01), PHILIPS 42PFL7772D/12 (Panel T420HW01 V.2 code 110).
The appearance of the power supply
Main features of the PHILIPS 42PFL7782D device:
Installed matrix (LCD-panel) T420HW01 V.2.
The matrix control uses the Timing Controller (T-CON) T420HW01.
To power the backlight, the Master: inverter is used, controlled by the OZ964SN PWM controller. As power elements of the inverter, keys of the type P1504BDG, P2504EDG are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL7782D TV are generated by the PLCD300P3 power supply module or its analogs using L6562D, TEA1601T, TEA1533AT microchips and 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP power switches.
MainBoard - the main board (motherboard) is a module 3139-123-62731, with the use of chips SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T and others.
The UV1318S / AIH-3 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
