PHILIPS
Model: 32PFL3605H / 12
Chassis / Version: TPM5.1E LA
Panel: LC320WUY (SC) (B1) code 117
Inverter (backlight): 715G3816-P02-H20-0024
PWM Inverter: UBA2071 (24)
MOSFET Inverter: FQPF8N60C
Trans Inverter: TRF-UU28
Power Supply (PSU): 715G3816-P02-H20-002U
PWM Power: SG6961 (PFC), TNY277PN, NCP1271 (PWM D65R2G), TNY274PN-TL (Standby)
MOSFET Power: FMV11N60ES FQPF3N80C
MainBoard: 715G3656-M1A-000-005X
IC MainBoard: MT5363, NT5TU32M16CG, MX25L4005, NAND128W3A2BN6E, M24C64
Tuner: TDTW-S810D
Control: 2422 549 02454 // YKF230-014
Specifications 32PFL3605H
PHILIPS 32PFL3605H
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the PHILIPS 32PFL3605H / 12 TV, as well as other devices, with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. Many visible changes make it possible to determine the future direction of troubleshooting and localization of the defect. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Power Module Repair
In cases where the PHILIPS 32PFL3605H / 12 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 at all, the power supply module 715G3816-P02 is most likely faulty -H20-0024 or, which is somewhat rarer, there is no power to the processor on the motherboard (a typical defect of some PHILIPS TVs). It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the FMV11N60ES FQPF3N80C converter, which are often found in a breakdown state in such situations.
The reasons for the breakdown of the power switch of the flyback converter of the power supply module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the TNY277PN SG6961 PWM controller chip NCP1271D65R2G main TNY274PN-TL dezh or breaks in the resistors in it strapping.
When using an active Power Factor Correction (CMC) circuit in the power module, the search for faulty elements is somewhat more complicated.
Inverter Repair
If the PHILIPS 32PFL3605H / 12 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
Diagnostics of the 715G3816-P02-H20-0024 inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or open circuits in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Repair Main Board
The motherboard SSB 715G3656-M1A-000-005X must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
One of the most common typical defects on the TPM4.1E LA chassis motherboard is caused by the use of the G973-120 linear stabilizer (G973-120ADJF11U) to power the processor in standby mode (3.3 V). Perhaps the problem is caused by poorly selected thermal conditions, or poor quality microcircuit.
External manifestations: the TV does not turn on and no indicators light up, although the power supply is working. At the output of the G973-120, the voltage is underestimated or 3.3V It is advisable to replace it with a more powerful 78R33 using heat sink.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust Repair That Only for professionals with sufficient experience in the field of electronic equipment repair !!!!!!!!
Service manual and schematic diagram ----------------------> 32PFL3605H/12 Chassis TPM5.1E LA
32HFL3232D/10, 32PFL3205H/12, 32PFL3605H/12, 42PFL3605H/12, 47PFL3605H/12, 47PFL3605H/60.
Service manual and schematic diagram ----------------------> 32PFL3605H/12 Chassis TPM4.1E LA
The appearance of the MainBoard 715G3656-M1A-000-005X is shown in the figure below:715G3656-M1A-000-005X
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the 715G3816-P02-H20-002U module provides for the use of the Power Factor Correction unit. The PFC circuit is a flyback converter based on the SG6961 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 32PFL3605H device:
Installed matrix (LCD panel) LC320WUY (SC) (B1) code 117.
To power the backlight, an inverter 715G3816-P02-H20-0024 is used, it is controlled by the PWM controller UBA2071 (24). The transformer TRF-UU28 is installed in the inverter converter. As power elements of the inverter, keys of the FQPF8N60C type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL3605H TV are generated by the 715G3816-P02-H20-002U power supply module or its analogs using the SG6961 (PFC), TNY277PN, NCP1271 (PWM D65R2G), TNY274PN-TL (Standby) microchips and power switches of the type FMV11N60ES FQPF3N80C.
MainBoard - the main board (motherboard) is a module 715G3656-M1A-000-005X, using chips MT5363, NT5TU32M16CG, MX25L4005, NAND128W3A2BN6E, M24C64 and others.
The TDTW-S810D tuner provides television reception and channel tuning.