Technical description and composition of the PHILIPS 47PFL7642D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 47PFL7642D / 12
Chassis / Version: LC7.2E LA
Panel: LC470WU4 (SL) (A2) Code 081
Lamp backlight: 23 Lamp CCFL
T-CON: 6870C-0120C
Inverter (backlight): 6632L-0392B MASTER, 6632L-0393B SLAVE
Power Supply (PSU): DPS-331AP
PWM Power: L6562D (PFC), DLA001D (L6598), DAS01A, ICE3B0565
MOSFET Power: 24N60, 2SK3568
MainBoard: 3139_123_62613 3139 123 62613 WK713.5
IC MainBoard: M30300SAGP, PNX8314HS, TDA9886T, TDA8932T
Tuner: TD1316AF / HP2
Specifications 47PFL7642D
PHILIPS 47PFL7642D
General recommendations for repairing TV LCD
Possible manifestations of defects
- PHILIPS 47PFL7642D does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, in some cases, the DPS-331AP power module is faulty. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches (24N60, 2SK3568) of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) L6562D (PFC), DLA001D (L6598), DAS01A, ICE3B0565, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
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 they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the 3139_123_62613 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements M30300SAGP, PNX8314HS, TDA9886T, TDA8932T. BGA chip malfunctions are usually easy to detect by warming up.
If a TD1316AF / HP2 tuner is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
Service manual and schematic diagram --------------------> PHILIPS 47PFL7642D Chassis LC7.2E LA.
The appearance of MainBoard 3139_123_62613 is shown in the figure below:3139_123_62613
The appearance of the power supply
Main features of the PHILIPS 47PFL7642D device:
Installed matrix (LCD panel) LC470WU4 (SL) (A2) Code 081.
The matrix control uses the Timing Controller (T-CON) 6870C-0120C.
An inverter 6632L-0392B is used to power the backlight.
The necessary supply voltages for all nodes of the PHILIPS 47PFL7642D TV are generated by the DPS-331AP power supply module or its analogs using L6562D (PFC), DLA001D (L6598), DAS01A, ICE3B0565 microcircuits and 24N60, 2SK3568 power switches.
MainBoard - the main board (motherboard) is a module 3139_123_62613, using microchips M30300SAGP, PNX8314HS, TDA9886T, TDA8932T and others.
The TD1316AF / HP2 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC470WU4-SLA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 47 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 1039.68x584.82 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 23 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V