Technical description and composition of the PHILIPS 42PFL7772D TV, type of panel and applicable modules. The composition of the modules.
PHILIPS
Model: 42PFL7772D / 12
Chassis / Version: LC7.5E LA
Panel: T420HW01 V.2 code 110
Inverter (backlight): VIT71043.50, VIT71043.51
Power Supply (PSU): PLCD300P3 3122 423 31942
PWM Power: TEA1601T, TEA1533AT (14pin), L6562D (PFC)
MOSFET Power: 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP
MainBoard: 3139-123-62731 WK720.4 313926854372
IC MainBoard: SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T
Tuner: UV1318S / AIH-3
Control: Remote: RC2034314 3139 123 62711v3 wk718.5; IR: 3139 123 6210.1 v2 wk632.5
Specifications 42PFL7772D
PHILIPS 42PFL7772D
General recommendations for repairing TV LCD
Possible malfunctions
- The PHILIPS 42PFL7772D TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In some of these cases, the main switching power supply, the PLCD300P3 module, is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP) and rectifier diodes for a possible partial or complete breakdown.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers TEA1601T, TEA1533AT (14pin), L6562D (PFC), in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuit should be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If you suspect a malfunction of the UV1318S / AIH-3 tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to self-repair a PHILIPS 42PFL7772D TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram Chassis LC7.5E LA
42PFL7772D/12 SSB 3139 123 62731 WK720.4 313926854372 panel code 110
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 42PFL7772D device:
Installed matrix (LCD panel) T420HW01 V.2 code 110.
To power the backlight used inverter VIT71043.50.
The necessary supply voltages for all nodes of the PHILIPS 42PFL7772D TV are generated by the PLCD300P3 power supply module or its analogs using TEA1601T, TEA1533AT (14pin), L6562D (PFC) microcircuits and power switches of the type 2SK4075, F11NM60N, P4NK60ZFP, P6NK60ZFP.
MainBoard - the main board (motherboard) is a module 3139-123-62731, using microchips 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
