Technical description and composition of the PHILIPS 20PHH4109 TV, panel type and applicable modules. The composition of the modules.PHILIPS LED
Model: 20PHH4109 / 60
Chassis / Version: TPN14.1E LA
Panel: TPM195WD1
LED backlight: LBM195M0904-E-1 (HF)
LED driver (backlight): integrated into PSU
PWM LED driver: PF7001S
MOSFET LED driver: MTD55N10Q8
Power Supply (PSU): 715G6297-P01-000-001E
PWM Power: PF6200
MOSFET Power: TK6A65D
MainBoard: 715G6092-M0D-000-004K
IC MainBoard: T72567BG, K4B1G1646G-BCK0, K9F1G08U0D-SIB0, CAT24C128WI, STA381BWTR
Tuner: ST03CS-2-E
Specifications 20PHH4109
PHILIPS 20PHH4109
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The PHILIPS 20PHH4109 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 such cases, the malfunction should be sought first in the 715G6297-P01-000-001E power supply module. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches (TK6A65D) of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
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 Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM PF6200 chips are usually checked by replacing with new, or obviously working.
- 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.
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.
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 TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 715G6092-M0D-000-004K should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - T72567BG, K4B1G1646G-BCK0, K9F1G08U0D-SIB0, CAT24C128WI, STA381BWTR and replace the failed chips with new ones. Some malfunctions can be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
Before changing the ST03CS-2-E tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
We recommend the owners of the 20PHH4109 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 42PFT6309/60 Chassis TPN14.1E LA.
MODELS:20PHH4109, 22PFH4109/88, 22PFK4109/12, 22PFT4109/12, 24PHH4109, 24PHK4109/12, 24PHT4109/12, 32PHH4109/88, 32PFH4109/88, 32PFT4109/12, 32PHT4109/12, 32PHH4109/60, 40PFH4109/88, 40PFT4109/12 , 47PFH4109/88, 47PFT4109/12
The appearance of the MainBoard 715G6092-M0D-000-004K is shown in the figure below:715G6092-M0D-000-004K
The appearance of the power supply
Main features of the PHILIPS 20PHH4109 device:
Installed matrix (LED-panel) TPM195WD1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the PF7001S PWM controller. As the power elements of the LED driver, keys of the MTD55N10Q8 type are used.
The necessary supply voltages for all nodes of the PHILIPS 20PHH4109 television are generated by the 715G6297-P01-000-001E power module, or its analogs using PF6200 microcircuits and TK6A65D type power switches.
MainBoard - the main board (motherboard) is a module 715G6092-M0D-000-004K, using chips T72567BG, K4B1G1646G-BCK0, K9F1G08U0D-SIB0, CAT24C128WI, STA381BWTR and others.
The ST03CS-2-E tuner provides television reception and channel tuning.
