Technical description and composition of the PHILIPS 32PFL7962D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL7962D / 12
Chassis / Version: LC7.5E LA
Panel: V315B1-L05 code 116 or 069 p / n: 932225393682
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: L6598 (PWM Resonant 16pin), L6562D (PFC), NCP1207AD
MOSFET Power: P10NK60ZFP inv, P20NM60FP pr, F3NK80Z dezh
MainBoard: 3139-123-62731 WK720.4 313926852502 3139 268 52502
IC MainBoard: PNX8314HS, SII9185ACTU, Video: SVP WX68 7568W-LF, RAM: K4D261638K-LC40
Tuner: UV1318S / AIH-3
Control: RC2034312 / 01 3139 238 15651 LF
Specifications 32PFL7962D
PHILIPS 32PFL7962D
General recommendations for repairing TV LCD
TV PHILIPS 32PFL7962D / 12, like other electronic devices, it is advisable to start repairing from inspection of external and internal elements. Visible damage to elements can sometimes suggest directions for troubleshooting even before the necessary measurements are taken. Experienced repairmen are often aware of the causes of the defect and possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
Power Module Repair
If the 32PFL7962D / 12 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some PHILIPS models. If there are no swollen filter capacitors in the secondary rectifier filter, the power supply should always be diagnosed by checking the fuse and, if it is open, the rectifier bridge diodes and the power switch P10NK60ZFP inv, P20NM60FP pr, F3NK80Z must first be checked for the possibility of an avalanche or thermal breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible PWM chip NCP1207AD = 1207 (8), L6562D (8), L6598 = DLA001D (16) from the manufacturer.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
Inverter Repair
If the PHILIPS 32PFL7962D / 12 does not have an image, but there is sound and the TV is controlled from 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 of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Repair Main Board
If the motherboard SSB 3139 268 52502 is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Attention to the owners! Attempts at self-repair of the PHILIPS 32PFL7962D / 12 TV are not recommended by the manufacturer and can lead to serious negative consequences!
One of the typical defects of the PHILIPS 32PFL7962D / 12 TV can occur in the V315B1-L05 code 116 or 069 - 9322 253 93682 panel.
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.
Keep in mind, similar symptoms may cause short circuits 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 cannot be replaced. In this case, it is necessary to replace the glass panel.
Service manual and schematic diagram 32PFL7962D/12 Chassis LC7.5E LA
32PFL7962D, 42PFL7962D, 32PFL7762D, 42PFL7762D, 52PFL7762D
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
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-182BP module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the L6562D PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 32PFL7962D device:
Installed matrix (LCD panel) V315B1-L05 code 116 or 069 p / n: 932225393682.
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 required supply voltages for all nodes of the PHILIPS 32PFL7962D TV are generated by the DPS-182BP power supply module or its analogs using L6598 (PWM Resonant 16pin), L6562D (PFC), NCP1207AD microcircuits and power switches of the type P10NK60ZFP inv, P20NM60FP pr, F3NK80 pr, Д3NK80.
MainBoard - the main board (motherboard) is a module 3139-123-62731, using chips PNX8314HS, SII9185ACTU, Video: SVP WX68 7568W-LF, RAM: K4D261638K-LC40 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