Technical description and composition of the PHILIPS 19PFL5403S TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 19PFL5403S / 60
Chassis / Version: TCM2.0E LA
Panel: SM19Z11A
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): JSY-190406-B
PWM Inverter: TL494C, LM493
MOSFET Inverter: ME4542
Trans Inverter: 1.01 27 HVT-086
Power Supply (PSU): 40-PWL20C-PWI1XG 996510014436
PWM Power: NCP1377 (PWM flyback 8pin)
MOSFET Power: 2SK2996
MainBoard: 40-LDMK35-MAE2XG
IC MainBoard: SII9185AC-7U, MT8295AE, WM8501GED, TDA9886TS, TDA7266
Tuner: TDQG4-601A
Specifications 19PFL5403D
PHILIPS 19PFL5403S
General recommendations for repairing TV LCD
Possible manifestations of defects
- The PHILIPS 19PFL5403S TV does not turn on and does not show any signs of turning on, does not respond to the control buttons or to the remote control.
Most likely in this case, the main switching power supply (IIP) 40-PWL20C-PWI1XG is faulty. It is necessary to measure its output voltages and, if they are absent, check the serviceability of power switches (2SK2996) and rectifier diodes in the converters for possible breakdown.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. NCP1377 PWM controllers (PWM flyback 8pin), in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- 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.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 40-LDMK35-MAE2XG 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 - SII9185AC-7U, MT8295AE, WM8501GED, TDA9886TS, TDA7266. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the TDQG4-601A tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention to users! Self-repair of a PHILIPS 19PFL5403S TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram 19PFL5403S/60 Chassis TCM2.0E LA
MODELS: 19PFL5403D, 20PFL3403D, 22PFL5403D, 26PFL3403D, 26PFL5403D.
PSU SCHEMATIC ---------------> 40-PWL20C-PWH1XG
The appearance of the MainBoard 40-LDMK35-MAE2XG is shown in the figure below:40-LDMK35-MAE2XG
40-LDMK35-MAE2XG can be used in TVs:
PHILIPS 19PFL5403/60 (Panel M190Z1-L01 Rev.C1), PHILIPS 19PFL5403S/60 (Panel SM19Z11A), PHILIPS 20HFL3330D (Panel LC201V02 (SD)(D1)), PHILIPS 22PFL5403H/60 (Panel M220Z1-L03), PHILIPS 26PFL5403/60 26PFL5403S/60 (Panel V260B1-L11), PHILIPS 19PFL5403D/10 (Panel M190Z1-L01 Rev.C1).
The appearance of the power supply
Main features of the PHILIPS 19PFL5403S device:
Installed matrix (LCD-panel) SM19Z11A.
To power the backlight, an inverter JSY-190406-B is used, controlled by a PWM controller TL494C, LM493. A transformer 1.01 27 HVT-086 is installed in the inverter converter. Keys of type ME4542 are used as power elements of the inverter.
The necessary supply voltages for all nodes of the PHILIPS 19PFL5403S TV are generated by the 40-PWL20C-PWI1XG power supply module or its analogs using NCP1377 microcircuits (PWM flyback 8pin) and 2SK2996 power switches.
MainBoard - the main board (motherboard) is a 40-LDMK35-MAE2XG module, using SII9185AC-7U, MT8295AE, WM8501GED, TDA9886TS, TDA7266 and others.
The TDQG4-601A tuner provides TV reception and channel tuning.
