Friday 24 January 2020

REPAIR / SERVICING TV PHILIPS 32PFL4208T60

Technical description and composition of the PHILIPS 32PFL4208T60 TV, type of panel and applicable modules. The composition of the modules.
PHILIPS LED
Model: 32PFL4208T60
Chassis / Version: TPM10.1E LA
Panel: TPT315B5-DXJSFE
LED backlight: LBM320M0904-BC-2 (HF) (0)
T-CON: 32-37 R0W2.1 HD VER 0.1 6870C-0442B
LED driver (backlight): integrated into PSU
PWM LED driver: PF7900S, PF7700A
Power Supply (PSU): 715G5793-P02-000-002H // 996590004749
PWM Power: PF6200 (PWM flyback)
MainBoard: 715G5675-M01-000-005K Ver A
IC MainBoard: MTK5580CPOI, TC58NVG1S3ETAI0, CAT24C128WI, STA381BWTR
Tuner: TDSY-G230D
Control: IR: 715G5763-R01-000-004S, Wi-Fi: 323C1632518D
Specifications 32PFL4208T
PHILIPS 32PFL4208T60
General repair guidelines for TV LCD LED
PHILIPS 32PFL4208T60, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. Visible damage to the elements can sometimes indicate the direction of the search for the defect even before the necessary measurements. 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 32PFL4208T60 does not turn on, does not respond to the remote control and the front panel buttons, does not blink light bulbs and does not show any signs of operability, the power module 996590004749 is probably faulty in this case. If it is working properly under such conditions, it is necessary to check the stabilizer (converter) processor power supply 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 network safety Anel. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
In cases where the PHILIPS 32PFL4208T60 TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the panel backlight LEDs 996590004748 code 184). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
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.
Diagnosis and repair of the motherboard 996590004745 is carried out by checking the operability of the stabilizers or power converters of the module chips. In some cases, a software update is required.
Owners of the 32PFL4208T60 TV are recommended for repairing contact only qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!

Service manual and schematic diagram -------> 32PFL4208T60 Chassis TPM10.1E LA part1, part2, part3


The appearance of the MainBoard 715G5675-M01-000-005K is shown in the figure below:
715G5675-M01-000-005K
715G5675-M01-000-005K can be used in TVs:
PHILIPS 22PFL4008T/60 (Panel TPM215HW01-HGJL02 code 200), PHILIPS 32PFL3008T/60 (Panel TPT315B5-TU4A code 196 p/n: 996590004018), PHILIPS 32PFL3018T/60 (Panel DUNTK5004ZZ RUNTK5003 code 196), PHILIPS 32PFL4208T60 (Panel TPT315B5-DXJSFE), PHILIPS 32PFL4308T/60 (Panel LTA320HJ06 001 code 185), PHILIPS 46PFL4308T/60 (Panel LTA460HJ18), PHILIPS 46PFL3008T/60 (Panel TPT460H1-HM01 Rev-C1J code 195).
The appearance of the power supply
Main features of the PHILIPS 32PFL4208T60 device:
Installed matrix (LED panel) TPT315B5-DXJSFE.
The matrix control uses the Timing Controller (T-CON) 32-37.
To power the backlight LEDs, a converter is used, combined with the power supply, it is controlled by the PF7900S, PF7700A PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 32PFL4208T60 TV are generated by the power supply module 715G5793-P02-000-002H, or its analogs using PF6200 microcircuits (PWM flyback).
MainBoard - the main board (motherboard) is a module 715G5675-M01-000-005K, using microchips MTK5580CPOI, TC58NVG1S3ETAI0, CAT24C128WI, STA381BWTR and others.
The TDSY-G230D tuner provides TV reception and channel tuning.