Technical description and composition of the PHILIPS 52PFL9704H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 52PFL9704H / 12
Chassis / Version: Q549.3E LA
Panel: LK520D3LA73 (SRPJ) code 230
LED driver (backlight): RUNTK4370TPZZ 9Y
Power Supply (PSU): PSC10283D
MainBoard: 3104.303.52401 3104.313.63571
IC MainBoard: PNX85439EH, M25P05, M24C64, DRX3926K, TPA6111A2
Tuner: HD1816AF-BHXP
Specifications 52PFL9704H
PHILIPS 52PFL9704H
General repair guidelines for TV LCD LED
Repair of the PHILIPS 52PFL9704H / 12 TV should begin with a careful external examination of all its components and modules. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the case when the 52PFL9704H does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module is probably defective in this case. If it is serviceable with such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If the PHILIPS 52PFL9704H TV does not have an image, but there is sound, there may be a malfunction in the LED backlight circuits of the LK520D3LA73 (SRPJ) code 230. It is also necessary to check the operability of the electrolytic capacitors of the BP secondary filter (power supply) for excessive ESR.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
Owners of the 52PFL9704H TV are recommended to contact qualified specialists with experience only for repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagramа 52PFL9704H/12 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 52PFL9704H device:
Installed matrix (LED-panel) LK520D3LA73 (SRPJ) code 230.
The LED driver RUNTK4370TPZZ is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the PHILIPS 52PFL9704H TV is carried out by the power module PSC10283D, or its analogues.
MainBoard - the main board (motherboard) is a module 3104.303.52401, using chips PNX85439EH, M25P05, M24C64, DRX3926K, TPA6111A2 and others.
The HD1816AF-BHXP tuner provides TV reception and channel tuning.