Technical description and composition of the PHILIPS 42PFL3405H TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL3405H / 12
Chassis / Version: TPM5.1E LA
Panel: LC420WUY (SC) (B1)
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2071AT (24)
MOSFET Inverter: AOTF10N60
Power Supply (PSU): 715G3812 -P02-H20-003D
PWM Power: SG6961 (PFC), TNY277PN, NCP1271, TNY274PN-TL (Stb)
MOSFET Power: FMV11N60ES, FQPF3N80C
MainBoard: 715G3656-M1C-000-005B
IC MainBoard: MT5363, NT5TU32M16CG, MX25L4005, NAND128W3A2BN6E, M24C64,
Tuner: TDTW-S810D (M)
Specifications 42PFL3405H
PHILIPS 42PFL3405H
General recommendations for repairing TV LCD
Possible manifestations of defects
- The PHILIPS 42PFL3405H does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
With similar manifestations, in some cases, the 715G3812 power module is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (FMV11N60ES, FQPF3N80C) and rectifier diodes for a possible partial or complete breakdown.
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 mains fuse and, less often, the current sensor at the source of the key are most often cut off.
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 microcircuits (PWM) SG6961 (PFC), TNY277PN, NCP1271, TNY274PN-TL (Stb) are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 715G3656-M1C-000-005B 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements MT5363, NT5TU32M16CG, MX25L4005, NAND128W3A2BN6E, M24C64, requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the tuner TDTW-S810D (M) and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention! For users and owners of 42PFL3405H TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
Service manual and schematic diagram -------> 32PFL3405H/12 Chassis TPM5.1E LA
FOR MODELS: 32HFL3232D/10, 32PFL3205H/12, 32PFL3605H/12, 42PFL3605H/12, 47PFL3605H/12, 47PFL3605H/60Main features of the PHILIPS 42PFL3405H device:
Installed matrix (LCD panel) LC420WUY (SC) (B1).
To power the backlight, a converter is used, combined with a power supply unit, controlled by a UBA2071AT PWM controller (24). As power elements of the inverter, keys of the AOTF10N60 type are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL3405H TV are generated by the 715G3812 power supply module or its analogs using SG6961 (PFC), TNY277PN, NCP1271, TNY274PN-TL (Stb) microchips and power switches of the FMV11N60ES, FQPF3N80C type.
MainBoard - the main board (motherboard) is a module 715G3656-M1C-000-005B, using chips MT5363, NT5TU32M16CG, MX25L4005, NAND128W3A2BN6E, M24C64, and others.
The TDTW-S810D (M) tuner provides television reception and channel tuning.