Technical description and composition of the PHILIPS 46PFL9705H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 46PFL9705H / 60
Chassis / Version: Q551.1E LA
Panel: LK460D3LA73
T-CON: RUNTK 4513TP ZC
LED driver (backlight): 3104 313 6442 3 310432863131 RUNTK4571TPZZ
Power Supply (PSU): FSP253-4FS01
PWM Power: A6069H
MainBoard: 3104_313_64512 314302714682
IC MainBoard: TPA3123D2, SiI9287BCNU, ST1S10PH, LD3985M25, TPS54283PWP
Tuner: TH2683
Specifications 46PFL9705H
PHILIPS 46PFL9705H
General repair guidelines for TV LCD LED
Possible malfunctions
- PHILIPS 46PFL9705H does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In such cases, the FSP253-4FS01 power supply is usually faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) A6069H, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- 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.
Usually in such cases, a malfunction is detected in the backlight nodes 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.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- 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_313_64512 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips TPA3123D2, SiI9287BCNU, ST1S10PH, LD3985M25, TPS54283PWP and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
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 TH2683. 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.
Attention! For users and owners of 46PFL9705H TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
Service manual and schematic diagram 46PFL9705H Chassis Q551.1E LA
The appearance of MainBoard 3104_313_64512 is shown in the figure below:3104_313_64512
3104_313_64512 can be used in TVs:
PHILIPS 40PFL8605H/60 (Panel LK400D3LB23 code 263 p/n: 932227887682), PHILIPS 40PFL9705H/60 (Panel LK400D3LB13 code 258), PHILIPS 46PFL9705H/60 (Panel LK460D3LA73), PHILIPS 46PFL8605H/12 (Panel LK460D3LB23).
The appearance of the power supply
Main features of the PHILIPS 46PFL9705H device:
Installed matrix (LED-panel) LK460D3LA73.
The matrix control uses the Timing Controller (T-CON) RUNTK.
The LED driver 3104 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the PHILIPS 46PFL9705H TV are generated by the FSP253-4FS01 power supply module or its analogs using A6069H microcircuits.
MainBoard - the main board (motherboard) is a 3104_313_64512 module, using TPA3123D2, SiI9287BCNU, ST1S10PH, LD3985M25, TPS54283PWP and other chips.
The TH2683 tuner provides TV reception and channel tuning.