Technical description and composition of the PHILIPS 42PFL7603D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL7603D / 12
Chassis / Version: Q528.2E LB
Panel: T420HW01 V.4 code: 131
Inverter (backlight): integrated into PSU
PWM Inverter: DDA001AG (BG)
Power Supply (PSU): DPS-279BP B
PWM Power: DDA001B (analog L6599), NCP1396 (PWM resonant), 1606B (PFC), 3BS02G (Standby)
MainBoard: 313912363401V3 3139 123 63411V3
IC MainBoard: CPU: PNX8541E / 2414, Scaler: PNX5050EH / M1
Tuner: TD1716F / BHXP-3
Specifications 42PFL7603D
PHILIPS 42PFL7603D
General recommendations for repairing TV LCD
Repair of TVs, as well as other devices, it is advisable to start with an external examination. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Useful tips can include swollen capacitors, ring cracks formed in the soldered terminals, a charred paint layer on the resistors, signs of overheating of the board, and many other external signs familiar to experienced repairmen.
Sometimes the PHILIPS 42PFL7603D TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the DPS-279BP B common power module. If it is working properly, you must check the standby batteries on the Main Board. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit DDA001B (analog L6599, NCP1396 PWM resonant), 1606B (PFC), 3BS02G (Standby), which it is desirable to check by replacement, are subject to verification.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. It should be remembered that when the protection is turned off in order to diagnose a malfunction, there is always a risk of failure of the power elements of the inverter. After repair, it is necessary to restore all standard converter protection circuits.
The motherboard 313912363401V3 3139 123 63411V3 should be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary. Board repair and replacement of CPU chips: PNX8541E / 2414, Scaler: PNX5050EH / M1 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages on the terminals of the tuner TD1716F / BHXP-3. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention to the owners! Attempts at self-repair of the PHILIPS 42PFL7603D TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual and schematic diagram 42PFL7603D/12 Chassis Q528.2E LB
The appearance of MainBoard 313912363401V3 is shown in the figure below:313912363401V3
313912363401V3 can be used in TVs:
PHILIPS 42PFL7603D/12 (Panel T420HW01 V.4 code: 131), PHILIPS 32PFL7403S/60 (Panel T315XW02 V.F).
PSU Advanced
The DPS-279BP power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on a 1606B PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Key Features of PHILIPS 42PFL7603D:
Installed matrix (LCD panel) T420HW01 V.4 code: 131.
To power the backlight lamps, a converter is used, combined with a power supply unit, controlled by a PWM controller DDA001AG (BG).
The necessary supply voltages for all nodes of the PHILIPS 42PFL7603D TV are generated by the DPS-279BP power supply module or its analogs using DDA001B (analog L6599), NCP1396 (PWM resonant), 1606B (PFC), 3BS02G (Standby) microcircuits.
MainBoard - the main board (motherboard) is a module 313912363401V3, using CPU chips: PNX8541E / 2414, Scaler: PNX5050EH / M1 and others.
The tuner TD1716F / BHXP-3 provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T420HW01 V4
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 (Haze 40%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 15/5 (Tr / Td); 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V