Technical description and composition of the PHILIPS 32PF9731D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PF9731D / 10
Chassis / Version: FJ3.0E LA
Panel: LC320WX2 (SL) (01) code 022
Power Supply (PSU): 3104_313_60924 3104 313 6092.4
MainBoard: 3104_313_60804 3104 313 6080.4
IC MainBoard: PNX3000HL, K4D2611638I-LC50,
Tuner: UV1318ST / A
Control: RC4401 / 10S 2422 549 01325 tun UV1318ST / AIHN-3, TD1316AF / PHP
Specifications 32PF9731D
PHILIPS 32PF9731D
General recommendations for repairing TV LCD
Repair of the PHILIPS 32PF9731D / 10 TV should begin with a careful external inspection of all its components and modules. Also subject to inspection are body elements, functional control buttons, screen, cords and connectors. Often, for certain external signs, it is 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. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Power Module Repair
In the absence of any signs of operability, when the PHILIPS 32PF9731D / 10 does not turn on and does not signal anything with the control lights on the panel, the power module is most likely faulty. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
Inverter Repair
If the PHILIPS 32PF9731D / 10 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to block a defect, it needs to be locked.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Repair Main Board
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - PNX3000HL, K4D2611638I-LC50, and replace failed chips with new ones.
Owners of the 32PF9731D / 10 TV are advised to contact qualified personnel with experience only for repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagram 32PF9731D/10 Chassis FJ3.0E LA
32PF9531/10, 32PF9631D/10, 32PF9731D/10, 37PF9731/69, 37PF9731D/10, 42PF9641D/10, 42PF9731D/10, 42PF9831/69, 42PF9831D/10
The appearance of MainBoard 3104_313_60804 is shown in the figure below:3104_313_60804
3104_313_60804 can be used in TVs:
PHILIPS 32PF9531/10 (Panel LC320WX2 (SL) (01)), PHILIPS 32PF9731D/10 (Panel LC320WX2(SL)(01) code 022), PHILIPS 42PF9641D/10 (Panel LC420WU2 (SL)(A1)).
The appearance of the power supply
Main features of the PHILIPS 32PF9731D device:
Installed matrix (LCD panel) LC320WX2 (SL) (01) code 022.
The necessary supply voltages for all nodes of the PHILIPS 32PF9731D TV are generated by the power supply module 3104_313_60924, or its analogs.
MainBoard - the main board (motherboard) is a module 3104_313_60804, using chips PNX3000HL, K4D2611638I-LC50, and others.
The UV1318ST / A tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320WX2-SL01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/10 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: HCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
