Technical description and composition of the PHILIPS 42PFL9703D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL9703D / 10
Chassis / Version: Q529.1E LA
Panel: LC420WUF-SAC1
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2071AS
MOSFET Inverter: FQPF19N20C
Power Supply (PSU): 310432852763 PSU 3104 303 50815B - 3104 313 61935B
PWM Power: 1606B (PFC)
MOSFET Power: 11N60 (PFC), 27P06
MainBoard: 3104.303.51026 - 3104.313.62146
PHILIPS
Model: 42PFL9703D / 10
Chassis / Version: Q529.1E LA
Panel: LC420WUF-SAC1 code 143
Inverter (backlight): BS33711-01 310432852762
Trans Inverter: BS33711-01
Power Supply (PSU): 310432852762 BS33711-01_cr 3104 303 50815 - 3104 313 61935
PWM Power: NCP1606B
MOSFET Power: FCP11N60
MainBoard: 3104.303.51026 - 3104.313.62146
Tuner: TD1716F 313914726561F
Specifications 42PFL9703D
PHILIPS 42PFL9703D
General recommendations for repairing TV LCD
Repair of all electronic devices, including the PHILIPS TV, made on the basis of the Q529.1E LA chassis, it is advisable to start with an external examination of its external and internal elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
Sometimes the PHILIPS 42PFL9703D TV just doesn’t 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 a failure of the common power supply module 310432852762 BS33711-01_cr. If it is working properly, you need to check the processor batteries on the SSB (Main Board). When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
It should be remembered that the keys used in switching power supplies (SMPS) rarely fail without themselves, without any reasons that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If the PHILIPS 42PFL9703D does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU. All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
We recommend the owners of the 42PFL9703D TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagram 42PFL9703D/10 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 42PFL9703D device:
Installed matrix (LCD panel) LC420WUF-SAC1 code 143.
To power the backlight used inverter BS33711-01. The transformer BS33711-01 is installed in the inverter converter.
The necessary supply voltages for all nodes of the PHILIPS 42PFL9703D 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.
The tuner TD1716F 313914726561F provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC420WUF-SAC1
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: 1200: 1
Display Colors: 1.06B (8-bit + FRC)
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
