Technical description and composition of the PHILIPS 32PFT4309 TV, panel type and applicable modules. The composition of the modules.PHILIPS LED
Model: 32PFT4309 / 60
Chassis / Version: TPN14.1E LA
Panel: TPT315B5-HVN05 code 033
LED backlight: LBM320P0701-FC-2
T-CON: T320HVN05.2 Ctrl BD
LED driver (backlight): integrated into PSU
PWM LED driver: PF7903BS
MOSFET LED driver: AOTF4126, AO4486
Power Supply (PSU): 715G6161-P02-W21-002E
PWM Power: LD7752, MP6902DS
MOSFET Power: TK11A65D
MainBoard: 715G6094-M0I-000-004K - (WK.1347.3) 006LP0261457B, (705TXESC6 1100100CX)
IC MainBoard: NT72567BG, K9F1G08U0D, 24C128, STA381BWTR
Tuner: ST03CS-2-E
Control: IR: 715G6167-R01-000-004I
Specifications 32PFT4309
PHILIPS 32PFT4309
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 32PFT4309 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In such cases, the fault should be sought first in the 715G6161-P02-W21-002E power supply module. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (TK11A65D) and the rectifier diodes of the converters for possible short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key 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 key can be PWM (LDW) LD7752, MP6902DS.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the motherboard (SSB) 715G6094-M0I-000-004K should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - NT72567BG, K9F1G08U0D, 24C128, STA381BWTR. Defective components should be replaced.
The malfunction of the ST03CS-2-E tuner is usually established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Owners of 32PFT4309 TVs are recommended to contact qualified specialists with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram 42PFT6309/60 Chassis TPN14.1E LA.
PSU SCHEMATIC ---------------> 715G6161
The appearance of the MainBoard 715G6094-M0I-000-004K is shown in the figure below:715G6094-M0I-000-004K
The appearance of the power supply
Main features of the PHILIPS 32PFT4309 device:
The matrix (LED panel) TPT315B5-HVN05 code 033 is installed.
The matrix control uses the Timing Controller (T-CON) T320HVN05.2.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the PF7903BS PWM controller. As power elements of the LED driver, keys of the type AOTF4126, AO4486 are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFT4309 television are generated by the 715G6161-P02-W21-002E power module or its analogs using LD7752, MP6902DS microcircuits and TK11A65D type power switches.
MainBoard - the main board (motherboard) is a module 715G6094-M0I-000-004K, using chips NT72567BG, K9F1G08U0D, 24C128, STA381BWTR and others.
The ST03CS-2-E tuner provides television reception and channel tuning.