Technical description and composition of the PHILIPS 40PFT4200 TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 40PFT4200 / 12
Chassis / Version: TPN15.1E LA
Panel: TPT400LA-HM10.S S01A
LED driver (backlight): integrated into PSU
PWM LED driver: PF7708AS
MOSFET LED driver: CYS9240
Power Supply (PSU): 715G6934-P01-000-002H
PWM Power: PF6003AHS (PWM Flyback), AOZ3015AI (Step-Down 12V / 5V)
MOSFET Power: TK8A65D
MainBoard: 715G6947-M01-000-004Y
IC MainBoard: CPU: NT72453; NAND Flash: MX30LF1G08AA-T1 1Gb; SOUND: AUDIO AD87588-LG48NAY
Tuner: ST42CS-2-E
Specifications 40PFT4200
PHILIPS 40PFT4200
General repair guidelines for TV LCD LED
Possible malfunctions
- The PHILIPS 40PFT4200 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In some of these cases, the main switching power supply - module 715G6934-P01-000-002H is found to be faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches (TK8A65D) and rectifier diodes for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) PF6003AHS (PWM Flyback), AOZ3015AI (Step-Down 12V / 5V), if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- 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 715G6947-M01-000-004Y motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: NT72453; NAND Flash: MX30LF1G08AA-T1 1Gb; SOUND: AUDIO AD87588-LG48NAY requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before changing the tuner ST42CS-2-E, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
It should be remembered! Attempts to independently repair the PHILIPS 40PFT4200 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual and schematic diagram Philips 40PFT4200/12 chassis TPN15.1E LA
FOR 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
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 / TPN16.2 , PHILIPS 32PHT4100 / 60 (Panel TPT315B5-0TU3A.Q code: 003).
The appearance of the power supply
Main features of the PHILIPS 40PFT4200 device:
Installed matrix (LED-panel) TPT400LA-HM10.S S01A.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the PF7708AS PWM controller. As power elements of the LED driver, keys of the type CYS9240 are used.
The necessary supply voltages for all nodes of the PHILIPS 40PFT4200 TV are generated by the power module 715G6934-P01-000-002H, or its analogs using PF6003AHS (PWM Flyback), AOZ3015AI (Step-Down 12V / 5V) microcircuits and TK8A65D 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.