Technical description and composition of the PHILIPS 24PHT4031 TV, panel type and applicable modules. The composition of the modules.PHILIPS LED
Model: 24PHT4031 / 60
Chassis / Version: TPN16.3E
Panel: TPM236WH2-WHBN00.K
LED backlight: LBM236M1304-BM-2
T-CON: HV236WHB-N00 47-6021045
LED driver (backlight): integrated into PSU
PWM LED driver: PF7708BS
MOSFET LED driver: AO4286
Power Supply (PSU): 715G7735-P01-000-002S
PWM Power: PF6005AG
MOSFET Power: STF6N65K3
MainBoard: 715G8232-M0C-B00-004T
IC MainBoard: NT72562TBG, AD87588
Tuner: TDSY-G430D, TDQS-A751F
Technical Specifications 24PHT4031
PHILIPS 24PHT4031
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The PHILIPS 24PHT4031 does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, the 715G7735-P01-000-002S power module usually fails. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (STF6N65K3) of converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) PF6005AG, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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 715G8232-M0C-B00-004T 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). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - NT72562TBG, AD87588. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner TDSY-G430D, TDQS-A751F may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
We recommend the owners of the 24PHT4031 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 ----------------------> PHILIPS 24PHT4031 Chassis TPN16.3E
Main features of the PHILIPS 24PHT4031 device:Installed matrix (LED-panel) TPM236WH2-WHBN00.K.
The matrix control uses the Timing Controller (T-CON) HV236WHB-N00.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the PF7708BS PWM controller. As power elements of the LED driver, keys of the AO4286 type are used.
The necessary supply voltages for all nodes of the PHILIPS 24PHT4031 TV are generated by the 715G7735-P01-000-002S power module, or its analogs using PF6005AG microcircuits and power switches of the STF6N65K3 type.
MainBoard - the main board (motherboard) is a module 715G8232-M0C-B00-004T, using microcircuits NT72562TBG, AD87588 and others.
Tuner TDSY-G430D, TDQS-A751F provides the reception of television programs and tuning to channels.
