Technical description and composition of the PHILIPS 40PFL8505C TV, panel type and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFL8505C / 60
Chassis / Version: Q551.1E LA
Panel: LK400D3LB23
LED backlight: 54LED E329419 K4475CS K4476CS
T-CON: CPWBX RUNTK 4513TP ZZ
LED driver (backlight): integrated into PSU
PWM LED driver: LDDA003A (24pin) DDA002B (19pin)
Power Supply (PSU): FSP175-4FS01 2722 171 90246 REV: 03
PWM Power: SSC9512s (DDA014), AS356M, DDA002B
MainBoard: 3104_313_64513 3104 313 64513 314302714853
IC MainBoard: TPA3123D2, XC9572XL, SiI9287BCNU, ST1S10PH
Tuner: 03-H3-082135-0611
Specifications 40PFL8505C
PHILIPS 40PFL8505C
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The PHILIPS 40PFL8505C TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
Most likely in this case, the main switching power supply (IIPS) FSP175-4FS01 is 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 breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damper circuits, or negative feedback elements in the stabilization circuit. PWM controllers SSC9512s (DDA014), AS356M, DDA002B, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- 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
The most likely in these cases is a malfunction of the LED backlight. 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 is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 3104_313_64513 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 - TPA3123D2, XC9572XL, SiI9287BCNU, ST1S10PH and failed chips replace 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 there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner 03-H3-082135-0611 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend the owners of the 40PFL8505C 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 40PFL8505C/60 Chassis Q551.1E LA
The appearance of MainBoard 3104_313_64513 is shown in the figure below:3104_313_64513
3104_313_64513 can be used in TVs:
PHILIPS 40PFL8505H/60 (Panel LK400D3LB23 SRPJ), PHILIPS 40PFL8605H/60 (Panel LK400D3LB23 code 263 p/n: 932227887682), PHILIPS 40PFL9705H/60 (Panel LK400D3LB13 code 258), PHILIPS 40PFL8505C/60 (Panel LK400D3LB23).
The appearance of the power supply
Main features of the PHILIPS 40PFL8505C device:
Installed matrix (LED-panel) LK400D3LB23.
In matrix management, the CPWBX Timing Controller (T-CON) is used.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a PWM controller LDDA003A (24pin) DDA002B (19pin).
The necessary supply voltages for all nodes of the PHILIPS 40PFL8505C TV are generated by the FSP175-4FS01 power supply module or its analogs using SSC9512s (DDA014), AS356M, DDA002B microcircuits.
MainBoard - the main board (motherboard) is a 3104_313_64513 module, using TPA3123D2, XC9572XL, SiI9287BCNU, ST1S10PH and other chips.
The tuner 03-H3-082135-0611 provides reception of television programs and tuning to channels.