Technical description and composition of the PHILIPS 32PFL3605 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL3605 / 60
Chassis / Version: TPM4.1E LA
Panel: LC320WUY (SC) (B1) code 117 p / n: 932225774682
Inverter (backlight): 715G3816-P01-H20-002U
PWM Inverter: UBA2071AT (24)
MOSFET Inverter: 11N60ES
Power Supply (PSU): 715G3816-P01-H20-002U (9965 100 34156)
PWM Power: SG6961 (PFC), NCP1271, TNY277PN
MOSFET Power: FMV11N60ES // FQPF3N80C
MainBoard: 715G3786-M1A-000-004X (B) (9965 100 34149)
IC MainBoard: MT8222TMMU, W9425G6EH-4, TL2428MCP02, 25Q32BVSIG, TPS65192, TPA3110D2
Tuner: TAFT-S712D
Control: Remote: 2422 549 02454 (RC4747), IR: 715G3851-R01-000-004B
Specifications 32PFL3605
PHILIPS 32PFL3605
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 having the appropriate knowledge, experience and qualifications required! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual and schematic diagram --------------------> 32PFL3605H/12 Chassis TPM5.1E LA
Service manual and schematic diagram --------------------> 32PFL3605H/12 Chassis TPM4.1E LA
The appearance of the MainBoard 715G3786-M1A-000-004X is shown in the figure below:715G3786-M1A-000-004X
715G3786-M1A-000-004X can be used in TVs:
PHILIPS 32PFL3605 / 60 (Panel LC320WUY (SC) (B1) code 117 p / n: 932225774682), PHILIPS 42PFL3605 / 60 (Panel LC420WUY (SC) (B1) code 116 p / n: 932227575682).
PSU Advanced
In the 32PFL3605 / 60 TV, the 715G3816-P01-H20-002U power module is installed using the PFC (Power Factor Correction) circuit acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the SG6961 PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the PHILIPS 32PFL3605 device:
Installed matrix (LCD panel) LC320WUY (SC) (B1) code 117 p / n: 932225774682.
To power the backlight, an inverter 715G3816-P01-H20-002U is used, it is controlled by the PWM controller UBA2071AT (24). As power elements of the inverter, keys of the 11N60ES type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL3605 television are generated by the 715G3816-P01-H20-002U power module, or its analogs using the SG6961 (PFC), NCP1271, TNY277PN microchips and power switches of the FMV11N60ES // FQPF3N80C type.
MainBoard - the main board (motherboard) is a module 715G3786-M1A-000-004X, using the chips MT8222TMMU, W9425G6EH-4, TL2428MCP02, 25Q32BVSIG, TPS65192, TPA3110D2 and others.
The TAFT-S712D tuner provides TV reception and channel tuning.