Technical description and composition of the PHILIPS 32PFL7572D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL7572D / 12
Chassis / Version: BJ3.1E LA
Panel: LC320W01-SLB1 116
Inverter (backlight): 6632L-0421A PNEL-T605A REV-0.4
PWM Inverter: OZ9966SN (24)
MOSFET Inverter: FDD8447L (3)
Power Supply (PSU): 3104_313_60926 3104 313 60926 24V 310432849233
PWM Power: MC34067P (16)
MOSFET Power: 18N50
MainBoard: 3104_313_60735 3104 313 60735
IC MainBoard: PNX8550, K4D551638H-LC50, PNX3000HL, ISP1561BM, K96561
Tuner: UV1318S / A
Specifications 32PFL7572D
PHILIPS 32PFL7572D
General recommendations for repairing TV LCD
Repair of all electronic devices, including the PHILIPS 32PFL7572D / 12 TV, it is advisable to start with an external examination of its external and internal elements. You should also pay attention to the condition of the case elements, connectors, cords, loops and buttons. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
Power Module Repair
Sometimes the PHILIPS 32PFL7572D / 12 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 common power supply module 3104 313 60926 32LCD SUPPLY 24V 310432849233. Diagnostics and repair of the common power supply should always be started by checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor 18N50.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the MC34067P PWM controller microcircuit or broken resistors in its wiring.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
Inverter Repair
If the PHILIPS 32PFL7572D / 12 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.
In most cases, the diagnosis and repair of the inverter 6632L-0421A PNEL-T605A REV-0.4 is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and when the lamps are depressurized. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Owners of the 32PFL7572D / 12 TV are recommended for repairs to contact only qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagram 32PFL7572D/12 Chassis BJ3.1E LA
FOR MODELS: 32PFL7332/10, 32PFL7562D/10, 32PFL7572D/10, 37PFL7332/10, 37PFL7562D/10, 42PFL7332/10, 42PFL7562D/10, 42PFL7572D/10
The mainBoard 3104_313_60735 view is shown in the figure below:3104_313_60735
3104_313_60735 can be used in TVs:
PHILIPS 26PF9531/10 (Panel LC260WX2 SL B2), PHILIPS 26PF9531/10 (Panel LC260WX2-SLB2 (SLA1)), PHILIPS 32PF9541/10 (Panel LC320W01-SL06 code 046), PHILIPS 32PFL7332/10 (Panel V315B1-L05 Rev.C1), PHILIPS 32PFL7572D/12 (Panel LC320W01-SLB1 116), PHILIPS 32PFL7582D/10 (Panel LC320W01 (SL)(06) code 046), PHILIPS 37PFL7562D/10 (Panel T370XW02 V05), PHILIPS 37PFL7332/10 (Panel LC370WX1 (SL)(B1)).
The appearance of the power supply
Main features of the PHILIPS 32PFL7572D device:
Installed matrix (LCD panel) LC320W01-SLB1 116.
An inverter 6632L-0421A is used to power the backlight, controlled by the OZ9966SN PWM controller (24). As power elements of the inverter, keys of the FDD8447L type (3) are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL7572D TV are generated by the 3104_313_60926 power supply module or its analogs using MC34067P microcircuits (16) and 18N50 type power switches.
MainBoard - the main board (motherboard) is a module 3104_313_60735, using chips PNX8550, K4D551638H-LC50, PNX3000HL, ISP1561BM, K96561 and others.
The UV1318S / A tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320W01-SLB1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 380 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G); 10 (MPRT)
Frequency: 60Hz
Lamp Type: 14 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V