Technical description and composition of the PHILIPS 24PHT4000 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 24PHT4000 / 60
Chassis / Version: TPN15.1E LA
Panel: TPM236WH2-BJ1P03.N REV.LC1E
LED driver (backlight): integrated into PSU
PWM LED driver: PF7708AS
MOSFET LED driver: AO4486
Power Supply (PSU): 715G6863-P01-001-002M
PWM Power: PF6003AG (OB2273)
MOSFET Power: TK5A65D
MainBoard: 715G6947-M01-000-004Y
IC MainBoard: CPU: NT72453; NAND Flash: MX30LF1G08AA-T1 1Gb; SOUND: AUDIO AD87588-LG48NAY
Tuner: ST42CS-2-E
Technical Specifications 24PHT4000
PHILIPS 24PHT4000
General repair guidelines for TV LCD LED
In cases where the PHILIPS 24PHT4000 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power supply module 715G6863-P01-001 is most likely faulty -002M or no standby power. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Options for the TK5A65D are available.
A breakdown of the power switch of the pulse converter is often triggered by other elements, for example, in the stabilization or control circuits of this switch, as well as by the damper elements in its drain and TPI winding.
If the PHILIPS 24PHT4000 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the TPM236WH2-BJ1P03.N REV.LC1E panel is likely. LEDs or their power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the backlight assembly.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
When repairing an MB board, you need to check its CPU components: NT72453; NAND Flash: MX30LF1G08AA-T1 1Gb; SOUND: AUDIO AD87588-LG48NAY. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
Before replacing the ST42CS-2-E tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the PHILIPS 24PHT4000 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual and schematic diagram Philips 40PFT4100/60 chassis TPN15.1E LA
Models: 22PFH4000, 22PFK4000, 24PHH4000, 24PHK4000, 24PHT4000, 24PHH5210, 24PHT5210, 24PHK5210, 32PFH4100, 32PFK4100, 32PFT4100, 32PHH4100, 32PHH4200, 32PHK4200, 32PHT4200/, 39PFH4100, 39PFK4100, 39PFT410, 39PFH4200, 39PFK4200, 39PFT4200, 40PFH4100, 40PFK4100, 40PFT4100, 40PFH4200, 40PFK4200, 48PFT4100, 48PFH4100, 48PFK4100, 48PFH6300, 48PFK6300, 48PFT6300, 55PFH6300, 55PFK6300, 55PFT6300
PSU SCHEMATIC ----------------------------> 715G6863
The appearance of the MainBoard 715G6947-M01-000-004Y is shown in the figure below:715G6947-M01-000-004Y
715G6947-M01-000-004Y can be used in TVs:
PHILIPS 40PFT4100/60 (Panel TPT400LA-HN02.S Rev-SS01B code 018), PHILIPS 24PHT4000/60 (Panel TPM236WH2-BJ1P03.N REV.LC1E), PHILIPS 40PFT4101/60 (Panel TPT4001A-HN02.S / TPN16.2ELA), PHILIPS 32PHT4100/60 (Panel TPT315B5-0TU3A.Q code: 003).
The appearance of the power supply
Key Features of the PHILIPS 24PHT4000:
The matrix (LED panel) TPM236WH2-BJ1P03.N REV.LC1E is installed.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the PF7708AS PWM controller. As the power elements of the LED driver, keys of the type AO4486 are used.
The necessary supply voltages for all nodes of the PHILIPS 24PHT4000 TV are generated by the 715G6863-P01-001-002M power module, or its analogs using PF6003AG (OB2273) microcircuits and TK5A65D type power switches.
MainBoard - the main board (motherboard) is a module 715G6947-M01-000-004Y, using CPU chips: NT72453; NAND Flash: MX30LF1G08AA-T1 1Gb; SOUND: AUDIO AD87588-LG48NAY and others.
The ST42CS-2-E tuner provides television reception and channel tuning.