Technical description and composition of the PHILIPS 40PFL9704H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFL9704H / 60
Chassis / Version: Q549.3E LA
Panel: LK400D3LA33
LED backlight: RUNTK4282TPZZ
LED driver (backlight): RUNTK4268TPZZ
PWM LED driver: TLC5946PWP
Power Supply (PSU): PSC10279C M 272217100861
MainBoard: 3104.303.52401 (3104.313.63571), EH938.6PL5.A
IC MainBoard: PNX85439EH, EDE1116AEBG, M25P05, M24C64, DRX3926K, TPA6111A2DGN
Tuner: HD1816AF-BHXP
Specifications 40PFL9704H
PHILIPS 40PFL9704H
General repair guidelines for TV LCD LED
Possible malfunctions
- The LG 32CS560 TV does not turn on and does not show any signs of turning on. There are no reactions to the control buttons or the remote control.
Failure in such cases should be sought in the power supply circuits of the PSC10279C. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches and rectifier diodes for a probable short circuit.
In case of avalanche and thermal breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode, and in case of short circuit in the power elements of the primary circuit, a mains fuse or a 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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 3104.303.52401 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - PNX85439EH, EDE1116AEBG, M25P05, M24C64, DRX3926K, TPA6111A2DGN and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the HD1816AF-BHXP tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
We recommend the owners of the 40PFL9704H TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram 46PFL9704H/60 Chassis Q549.3E LA
40PFL9704H/12, 40PFL9704H/60, 46PFL9704H/12, 46PFL9704H/60, 52PFL9704H/12
The appearance of MainBoard 3104.303.52401 is shown in the figure below:3104.303.52401
3104.303.52401 can be used in TVs:
PHILIPS 37PFL9604H/60 (Panel T370HW02 V9), PHILIPS 40PFL9704H/60 (Panel LK400D3LA33), PHILIPS 40PFL9904/12 (Panel LK400D3LA43 (SRPJ) B p/n: 932227424682), PHILIPS 46PFL9704H/60 (Panel LK460D3LA43 code 195), PHILIPS 52PFL9704H/12 (Panel LK520D3LA73 (SRPJ) code 230).
The appearance of the power supply
Main features of the PHILIPS 40PFL9704H device:
Installed matrix (LED-panel) LK400D3LA33.
The LED driver RUNTK4268TPZZ is used to power the backlight LEDs, it is controlled by the TLC5946PWP PWM controller.
The formation of the necessary supply voltages for all nodes of the PHILIPS 40PFL9704H TV is carried out by the PSC10279C power supply module, or its analogues.
MainBoard - the main board (motherboard) is a module 3104.303.52401, using chips PNX85439EH, EDE1116AEBG, M25P05, M24C64, DRX3926K, TPA6111A2DGN and others.
The HD1816AF-BHXP tuner provides TV reception and channel tuning.