Technical description and composition of the PHILIPS 32PFL7762D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL7762D / 12
Chassis / Version: LC7.5E LA
Panel: LC320W01-SLB1 code 116
Inverter (backlight): 6632L-0421A (T60A) 2300KFS021B (LY) -F
PWM Inverter: OZ9966SN
MOSFET Inverter: FDD8447L
Power Supply (PSU): DPS-182BP DELTA
PWM Power: L6598 (PWM Resonant 16pin), L6562D (PFC), NCP1207AD (8pin)
MOSFET Power: P10NK60ZFP, P20NM60FP (PFC), F3NK80Z
MainBoard: 3139-123-62731 3139 123 6273.1
IC MainBoard: SVP WX68 7568W-LF, K4D261638K-LC40
Tuner: UV1318S / AIH-3
Control: RC2034312 / 01 3139 238 15651LF
Specifications 32PFL7762D
PHILIPS 32PFL7762D
General recommendations for repairing TV LCD
Like all other TVs, it is advisable to start PHILIPS 32PFL5332D 32PFL7762D / 12 with a careful inspection of both external and internal elements and modules. It often happens that some damage to elements or connections helps determine the direction of the troubleshooting. 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
In the absence of any signs of operability, when the PHILIPS 32PFL5332D 32PFL7762D / 12 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, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power key.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
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
Sometimes the PHILIPS 32PFL5332D 32PFL7762D / 12 TV does not have an image, but there is sound, or the image will appear and immediately disappear. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the inverter itself, including the power supply unit (power supply unit).
When repairing the inverter 6632L-0421A (T60A) 2300KFS021B (LY) -F, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Owners and users of the PHILIPS 32PFL5332D 32PFL7762D / 12 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram 32PFL7762D/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 was 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
Key Features of PHILIPS 32PFL7762D:
Installed matrix (LCD panel) LC320W01-SLB1 code 116.
To power the backlight, an inverter 6632L-0421A is used, it is controlled by the PWM controller OZ9966SN. As power elements of the inverter, keys of the FDD8447L type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL7762D TV are generated by the DPS-182BP power supply module or its analogs using microcircuits L6598 (PWM Resonant 16pin), L6562D (PFC), NCP1207AD (8pin) and power switches of the type P10NK60ZFP, P20NM60FP (PFC) F3NK80Z.
MainBoard - the main board (motherboard) is a module 3139-123-62731, using chips SVP WX68 7568W-LF, K4D261638K-LC40 and others.
The UV1318S / AIH-3 tuner provides TV reception and channel tuning.
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