Technical description and composition of the PHILIPS 32PFL7782D TV, panel type and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL7782D / 12
Chassis / Version: LC7.5E LA
Panel: V315B1-L05 Rev. C1 code 069
Lamp backlight: 16 Lamp CCFL
T-CON: V315B1-C05 12V CM2681A-KG, AS15-G, MAXIM 8728
Inverter (backlight): VIT70043.50 (I315B1-16D-L001A)
PWM Inverter: OZ964GN
MOSFET Inverter: AOD604
Power Supply (PSU): DPS-182BP
PWM Power: NCP1207AD (8), L6562D (PFC), L6598 (DLA001D PWM Resonant 16pin)
MOSFET Power: P10NK60ZFP inv, P20NM60FP pr, F3NK80Z dezh
MainBoard: 3139-123-62731 3139 123 62731
IC MainBoard: TDA10046AHT, PNX8314HS, SII9185ACTU, TDA9886T
Tuner: UV1318S / AIH-3
Control: RC2034314 3139 238 15911
Specifications 32PFL7782D
PHILIPS 32PFL7782D
General recommendations for repairing TV LCD
It is recommended that you start the troubleshooting of a PHILIPS 32PFL7782D / 12 TV, like all other electronic devices, with an external inspection of both external and internal elements and modules. Many visible changes make it possible to determine the future direction of troubleshooting and localization of 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.
Power Module Repair
In cases when the PHILIPS 32PFL7782D / 12 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the DPS-182BP power supply module is most likely to be faulty or, which is somewhat less common, there is no processor power on the motherboard (a typical defect of some PHILIPS TVs). 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 cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main power supply unit. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter P10NK60ZFP inv, P20NM60FP pr, F3NK80Z dezh, which can be installed separately on the radiator, or integrated with a PWM controller.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller NCP1207AD = 1207 (8), L6562D (8), L6598 = DLA001D (16), which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
It is somewhat more difficult to find faults in the converter of the power module with an active KKM (power factor corrector).
Inverter Repair
If the PHILIPS 32PFL7782D / 12 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Diagnostics and repair of the inverter are 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.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
We recommend the owners of the 32PFL7782D / 12 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
One of the typical defects of the PHILIPS 32PFL7782D / 12 TV may occur in the V315B1-L05 Rev.C1 panel code 069.
External manifestations: color distortion in the image as a negative in the image, light tones predominate. Typically, in such cases, the AS15-G gamma corrector is faulty. Another indicator of its malfunction is an excessively strong heating, which in practice allows you to do without measuring voltage gradations of gray.
In most cases, replacing the AS15-G solves the problem.
It should be remembered that similar symptoms can cause faults in the column drivers of the panel, which is usually indicated by interference in the form of even vertical stripes on the screen. Then, after replacing the AS15-G, the situation does not change. Drivers are in loops and can not be replaced. In this case, it is necessary to replace the glass panel.
The appearance of MainBoard 3139-123-62731 is shown in the figure below:3139-123-62731
3139-123-62731 can be used in televisions:
PHILIPS 32PFL7762D/12 (Panel LC320W01-SLB1 code 116), PHILIPS 32PFL7782D/12 (Panel V315B1-L05 Rev.C1 code 069), PHILIPS 32PFL7962D/12 (Panel V315B1-L05 code 116 or 069 p/n: 932225393682), PHILIPS 42PFL7962D/12 (Panel T420HW01 V.2 code 110), PHILIPS 32PFL7772D/12 (Panel LC320W01), PHILIPS 42PFL7772D/12 (Panel T420HW01 V.2 code 110).
PSU Advanced
The 32PFL7782D / 12 model uses a DPS-182BP power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the L6562D PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the PHILIPS 32PFL7782D device:
Installed matrix (LCD panel) V315B1-L05 Rev. C1 code 069.
The matrix control uses the Timing Controller (T-CON) V315B1-C05.
The VIT70043.50 inverter is used to power the backlight, controlled by the OZ964GN PWM controller. As power elements of the inverter, keys of the AOD604 type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL7782D TV are generated by the DPS-182BP power supply module or its analogs using NCP1207AD (8), L6562D (PFC), L6598 (DLA001D PWM Resonant 16pin) microcircuits and power switches of the type P10NK60ZFP inv, P20N60 F3NK80Z dezh.
MainBoard - the main board (motherboard) is a module 3139-123-62731, using chips TDA10046AHT, PNX8314HS, SII9185ACTU, TDA9886T and others.
The UV1318S / AIH-3 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V315B1-L05
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 18/6 (Tr / Td); 8.5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V