Technical description and composition of the PHILIPS 32PFL3404H TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL3404H / 12
Chassis / Version: TPS2.1E LA
Panel: LC320WXE
T-CON: LC320WXN-SBA1 TL2417MC, BUF08821, TPS65161
Inverter (backlight): integrated into PSU
PWM Inverter: BA2071AT
MOSFET Inverter: 2SK4087LS
Trans Inverter: 80GL26T938-DN
Power Supply (PSU): 715G3308-1
PWM Power: TNY277PN, NCP1271A
MOSFET Power: P8NK80ZFP
MainBoard: 715G3299-2
IC MainBoard: MT8292N, MT8292N, MT8295AE, NT5TU32M16CG-25C, TDA8933BTW, 24C32WP, 25L4005M, HDMI 402WP, NAND128W3A2BNB
Tuner: 3139 147 26971
Control: RC4747 / 01
Specifications 32PFL3404H
PHILIPS 32PFL3404H
General recommendations for repairing TV LCD
Like all other televisions, it is advisable to start PHILIPS 32PFL3404H / 12 repairing with a careful inspection of both external and internal elements and modules. 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
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the 715G3308-1 power module is faulty and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain PHILIPS models and happens much less often. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the P8NK80ZFP power switch is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
The reasons for the breakdown of the power switch of the flyback converter of the power 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 PWM controller chip or breakage of the resistors in its wiring.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
Inverter Repair
If the PHILIPS 32PFL3404H / 12 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
Often, attempts to repair the 715G3308-1 inverter are hampered by the fact that the diagnosis of the malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Repair Main Board
On the motherboard 715G3299-2, in the event of a malfunction, you should first check the performance of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software). When repairing an MB board, you need to check its components MT8292N, MT8292N, MT8295AE, NT5TU32M16CG-25C, TDA8933BTW, 24C32WP, 25L4005M, HDMI 402WP, NAND128W3A2BNB. Defective items should be replaced.
Attention to users! Independent repair of a PHILIPS 32PFL3404H / 12 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 32PFL3404H/12 Chassis TPS2.1E LA
FOR MODELS 19PFL3404, 22PFL3404, 26PFL3404, 32PFL3404
The appearance of the MainBoard 715G3299-2 is shown in the figure below:715G3299-2
The appearance of the power supply
Main features of the PHILIPS 32PFL3404H device:
Installed matrix (LCD panel) LC320WXE.
The matrix control uses the Timing Controller (T-CON) LC320WXN-SBA1.
To power the backlight, a converter is used, combined with a power supply, controlled by a BA2071AT PWM controller. The transformer 80GL26T938-DN is installed in the inverter converter. As power elements of the inverter, keys of the 2SK4087LS type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL3404H TV are generated by the 715G3308-1 power module or its analogs using TNY277PN, NCP1271A microcircuits and P8NK80ZFP type power switches.
MainBoard - the main board (motherboard) is a 715G3299-2 module, using the chips MT8292N, MT8292N, MT8295AE, NT5TU32M16CG-25C, TDA8933BTW, 24C32WP, 25L4005M, HDMI 402WP, NAND128W3A2BNB and others.
The tuner 3139 147 26971 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXE-SBD1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V