Technical description and composition of the PHILIPS 32PFL3404 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 32PFL3404 / 60
Chassis / Version: TPS2.1E LA
Panel: LC320WXE (SB) (A1) p / n: 9322 267 40682
T-CON: 6870C-0238B
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2071 (24)
MOSFET Inverter: K4087
Trans Inverter: 80GL26T938-DN
Power Supply (PSU): 715G3308-1 (2) 9965 100 28553
PWM Power: TNY277PN (7), NCP1271A (8)
MOSFET Power: P8NK80ZFP
MainBoard: 715G3285-1B 9965 100 28549
IC MainBoard: MST9A885GL, W9412G6IH-4
Tuner: TAF-S710D
Control: IR: 715G3374-1
Specifications 32PFL3404
PHILIPS 32PFL3404
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the PHILIPS 32PFL3404 / 60 TV, as well as other devices, with a careful external examination of internal and external elements, including case parts, a display, buttons, and cables. Many visible changes make it possible to determine the future direction of troubleshooting and localization of the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
Power Module Repair
Sometimes the PHILIPS 32PFL3404 / 60 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common power supply module 715G3308-1 (2) 9965 100 28553. If there are no swollen filter capacitors in the secondary rectifiers, the diagnostics of the power supply should always be started by checking the fuse and, if it is broken, the diodes must first be checked rectifier bridge and power switch P8NK80ZFP for the likelihood of an avalanche or thermal breakdown.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the TNY277PN (7) 1271A (8) PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuit.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
Inverter Repair
If there is no image when you turn on the PHILIPS 32PFL3404 / 60, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
When repairing the 715G3308-1 inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
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
If the motherboard 715G3285-1B 9965 100 28549, tun TAF-S710D is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. In cases of attempts to repair the MB board (SSB), it is necessary to check the serviceability of its elements - MST9A885GL, W9412G6IH-4 which may require replacement with new ones.
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 the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual and schematic diagram 32PFL3404H/12 Chassis TPS2.1E LA
FOR MODELS 19PFL3404, 22PFL3404, 26PFL3404, 32PFL3404
The appearance of the MainBoard 715G3285-1B is shown in the figure below:715G3285-1B
715G3285-1B can be used in TVs:
PHILIPS 32PFL3404/60 (Panel LC320WXE (SB)(A1) p/n: 9322 267 40682), PHILIPS 42PFL3604/60 (Panel LC420WUE-SBA1).
The appearance of the power supply
Main features of the PHILIPS 32PFL3404 device:
Installed matrix (LCD panel) LC320WXE (SB) (A1) p / n: 9322 267 40682.
The matrix control uses the Timing Controller (T-CON) 6870C-0238B.
To power the backlight, a converter is used, combined with a power supply, controlled by a UBA2071 PWM controller (24). The transformer 80GL26T938-DN is installed in the inverter converter. As power elements of the inverter, keys of the K4087 type are used.
The necessary supply voltages for all nodes of the PHILIPS 32PFL3404 television are generated by the 715G3308-1 power module or its analogs using TNY277PN (7), NCP1271A (8) microcircuits and P8NK80ZFP type power switches.
MainBoard - the main board (motherboard) is a module 715G3285-1B, using microchips MST9A885GL, W9412G6IH-4 and others.
The TAF-S710D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXE-SBA1
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: 8.0 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
