Technical description and composition of the PHILIPS 42PFL7433D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL7433D
Chassis / Version: Q529.1E LA
Panel: LC420WUF (SA) (A1)
Lamp backlight: 18 Lamp EEFL
T-CON: 6870C-0202B (2040D)
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2071ATS
MOSFET Inverter: FQPF19N20C
Power Supply (PSU): 310432852762 3104 303 50815A 3104 313 61935A
PWM Power: NCP1606B
MOSFET Power: FCP11N60
MainBoard: 3104.303.51026
IC MainBoard: PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL
Tuner: TD1716F / BHXP-3
Specifications 42PFL7433D
PHILIPS 42PFL7433D
General recommendations for repairing TV LCD
Possible malfunctions
- The PHILIPS 42PFL7433D 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.
Typically, with such manifestations, the defect is caused by faulty elements in the main power supply module 310432852762. In the absence of the necessary supply voltage in the secondary circuits of the converters, it is necessary to check the power switches (FCP11N60) and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the mains fuse and, less often, the current sensor at the source of the key are most often cut off.
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 damper circuits, or negative feedback elements in the stabilization circuit. NCP1606B PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, 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. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 3104.303.51026 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL. BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the TD1716F / BHXP-3 tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
We recommend the owners of the 42PFL7433D TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram PHILIPS 42PFL7433D Chassis Q529.1E LA
The appearance of MainBoard 3104.303.51026 is shown in the figure below:3104.303.51026
3104.303.51026 can be used in TVs:
PHILIPS 32PFL7623D/10 (Panel LC320WXN-SAB1 code 136), PHILIPS 32PFL9603D/10 (Panel LK315D3LZ43), PHILIPS 32PFL9613 (Panel 32 ), PHILIPS 37PFL9603D/10 (Panel LC370WUF-SAB1 p/n: 932226169682), PHILIPS 37PFL9603D/10 (Panel LC370WUF SAB1 (LGPH) code 141), PHILIPS 42PFL7403S/60 (Panel p/n: 932225845000), PHILIPS 42PFL7623D/10 (Panel LC420WUE - SAA1), PHILIPS 42PFL9703D/10 (Panel LC420WUF-SAC1), PHILIPS 42PFL9703D/10 (Panel LC420WUF-SAC1 code 143), PHILIPS 42PFL9803H/10 (Panel T420HW02 V.1 code 149 p/n: 932226404682 ).
The appearance of the power supply
Main features of the PHILIPS 42PFL7433D device:
Installed matrix (LCD panel) LC420WUF (SA) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0202B.
To power the backlight, a converter is used, combined with a power supply, controlled by a UBA2071ATS PWM controller. As power elements of the inverter, keys of the type FQPF19N20C are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL7433D TV are generated by the power supply module 310432852762 or its analogs using NCP1606B microcircuits and power switches of the FCP11N60 type.
MainBoard - the main board (motherboard) is a module 3104.303.51026, using chips PNX8541E / 2414, STI7101BWC, EDD2516AETA, M29W640FT70N6, ISP1564HL and others.
The tuner TD1716F / BHXP-3 provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC420WUF-SAA1
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 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 1.06B (8-bit + Dithering)
Response Time: 8 (MPRT)
Frequency: 120Hz
Lamp Type: 18 pcs EEFL Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V