Friday 24 January 2020

REPAIR / SERVICING TV PHILIPS 32PFL5007T

Technical description and composition of the PHILIPS 32PFL5007T TV, type of panel and applicable modules. The composition of the modules.
PHILIPS LED
Model: 32PFL5007T / 60
Chassis / Version: Q552.4E LA
Panel: LTA320HW02 001 code 395
T-CON: H_120PSQBC4LV1.0
LED driver (backlight): integrated into PSU
PWM LED driver: DDA015
MOSFET LED driver: D4NK60Z
Power Supply (PSU): DPS-98EP
PWM Power: DDA010 (Standby), ICE2QS02G (PWM), ST9S101
MainBoard: 313929716961 3139 123 65324 3139 123 65334
IC MainBoard: TAS5731, SPARTAN-6, RT8293AH (8)
Tuner: SUT-RE214AN
Control: Remote: 242254990467, IR 272217190529, Wi-Fi: WUBA-618GN173WW
Specifications 32PFL5007T
PHILIPS 32PFL5007T
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the PHILIPS 32PFL5007T / 60 TV, as well as the external elements of the case. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
In the case when the 32PFL5007T does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the DPS-98EP power supply module is probably faulty in this case. If it is serviceable under such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard.When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
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 regulator chip DDA010 (8) are subject to verification, which it is desirable to verify by replacement.
If the PHILIPS 32PFL5007T TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the LTA320HW02 001 code 395 panel is likely. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the power supply unit (PSU) for an overestimated ESR.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Repair or diagnostics of the YU 238.5 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In cases where there is no tuning to the local television channels, you should make sure that there is a varicap supply voltage (30-33V) and other supply voltages at the terminals of the SUT-RE214AN tuner.
Remember! Attempts to self-repair by users of the PHILIPS 32PFL5007T TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

Service manual and schematic diagram 32PFL5007T/60 Chassis Q552.4E LA


 The appearance of MainBoard 313929716961 is shown in the figure below:
3139 123 65324, 3139 123 65334
313929716961
313929716961 can be used in TVs:
PHILIPS 32PFL4007T/60 (Panel T320HVN01.5 code 408), PHILIPS 32PFL5007T/60 (Panel LTA320HW02 001 code 395), PHILIPS 32PFL5507T/60 (Panel LTA320HW02 code 395 p/n: 932229091682), PHILIPS 40PFL5507T/60 (Panel LTA400HV04 001 code 396 p/n: 932229092682 ), PHILIPS 40PFL5527T/60 (Panel LTA400HV04 001 code 396 p/n: 932229092682), PHILIPS 42PFL4307T/12 (Panel LC420EUE (SE)(F2) code 411 p/n: 932229210682), PHILIPS 46PFL5507T/60 (Panel LTA460HW04 001 code 397), PHILIPS 47PFL4007T/60 (Panel LC470EUE SEM2 code 349 p/n: 932228892682).
The appearance of the power supply
Main features of the PHILIPS 32PFL5007T device:
Installed matrix (LED-panel) LTA320HW02 001 code 395.
The matrix control uses the Timing Controller (T-CON) H_120PSQBC4LV1.0.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the DDA015 PWM controller. As the power elements of the LED driver, keys of the D4NK60Z type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL5007T TV are generated by the DPS-98EP power module or its analogs using DDA010 (Standby), ICE2QS02G (PWM), ST9S101 microcircuits.
MainBoard - the main board (motherboard) is a module 313929716961, using chips TAS5731, SPARTAN-6, RT8293AH (8) and others.
The SUT-RE214AN tuner provides TV reception and channel tuning.