Technical description and composition of the PHILIPS 32PFL4007H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 32PFL4007H / 12
Chassis / Version: Q552.4E LA
Panel: TPT315B5-J2LE2
T-CON: V320HJ2-CPE2; CM2801B, CM501, CM601
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700S
Power Supply (PSU): 715G5194-P02-W20-002M
PWM Power: LD7523GS, A6069H
MainBoard: WK1147.5 3139 123 65303V2
IC MainBoard: TAS5731PHP, SiL9287BCNU, STV0903B, CY7C656-32 54227, FTG256AIV1205, RT8293AH, RT9025;
Tuner: SUT-RE214AN
Specifications 32PFL4007H
PHILIPS 32PFL4007H
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 32PFL4007H TV does not turn on, does not respond to the remote control and the control panel buttons, and does not blink with any indicators.
With such manifestations, in most cases, the 715G5194-P02-W20-002M power module is faulty. It is necessary to measure the secondary output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse 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 (LDW) LD7523GS, A6069H. It is checked only by replacement with a known good one.
- 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.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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 705TQCPL009001 motherboard should begin by checking the stabilizers and power converters needed to power the chips 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 TAS5731PHP, SiL9287BCNU, STV0903B, CY7C656-32 54227, FTG256AIV1205, RT8293AH, RT9025; . BGA chip malfunctions are usually easy to detect by warming up.
If you suspect a malfunction of the SUT-RE214AN tuner, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and impulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention TV owners! Attempts at self-repair of PHILIPS 32PFL4007H are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard WK1147.5 is shown in the figure below:WK1147.5
The appearance of the power supply
Main features of the PHILIPS 32PFL4007H device:
Installed matrix (LED-panel) TPT315B5-J2LE2.
The matrix control uses the Timing Controller (T-CON) V320HJ2-CPE2 ;.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the PF7900S, PF7700S PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 32PFL4007H TV are generated by the power supply module 715G5194-P02-W20-002M, or its analogs using microcircuits LD7523GS, A6069H.
MainBoard - the main board (motherboard) is a WK1147.5 module, using TAS5731PHP, SiL9287BCNU, STV0903B, CY7C656-32 54227, FTG256AIV1205, RT8293AH, RT9025; and others.
The SUT-RE214AN tuner provides TV reception and channel tuning.