Technical description and composition of the PHILIPS 32PFL7772D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL7772D / 12
Chassis / Version: LC7.5E LA
Panel: LC320W01
Inverter (backlight): 2300KFS021 B (LY) -F 6632L-0421A LGIT PNEL-T605A REV-0.4
PWM Inverter: OZ9966SN
MOSFET Inverter: FDD8447L
Power Supply (PSU): DPS-182BP
PWM Power: L6598, L6562D (PFC), NCP1207AD
MOSFET Power: P10NK60ZFP, P20NM60FP
MainBoard: 3139-123-62731 WK720.4
IC MainBoard: SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T
Tuner: UV1318S / AIH-3
Specifications 32PFL7772D
PHILIPS 32PFL7772D
General recommendations for repairing TV LCD
Possible manifestations of defects
- The PHILIPS 32PFL7772D TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
Failure in such cases should begin to be sought in the DPS-182BP power supply circuits. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of power switches (P10NK60ZFP, P20NM60FP) of converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips L6598, L6562D (PFC), NCP1207AD are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 3139-123-62731 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner UV1318S / AIH-3. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
TV users and owners need to remember that attempts to self-repair a PHILIPS 32PFL7772D TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram Chassis LC7.5E LA
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).
The appearance of the power supply
Main features of the PHILIPS 32PFL7772D device:
Installed matrix (LCD-panel) LC320W01.
To power the backlight, an inverter 2300KFS021 is used, it is controlled by the OZ9966SN PWM controller. As power elements of the inverter, keys of the FDD8447L type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL7772D TV are generated by the DPS-182BP power module or its analogs using L6598, L6562D (PFC), NCP1207AD microcircuits and power switches of the type P10NK60ZFP, P20NM60FP.
MainBoard - the main board (motherboard) is a module 3139-123-62731, with the use of chips SVP WX68 7568W-LF, K4D261638K-LC40, PNX8314HS, M29W320ET, Sil9125CTU, TDA9886T 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-SL20
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: 500 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: 18 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
