Technical description and composition of the PHILIPS 42PFL3604 TV, panel type and applicable modules. The composition of the modules.PHILIPS
Model: 42PFL3604 / 60
Chassis / Version: TPS2.2E LA
Panel: LC420WUE-SBA1 // T420HW04 V.0
T-CON: T420HW04 V0 42T06-C03 AUO-12401 TPS65161
Inverter (backlight): 715G3474-2
PWM Inverter: UBA2071 (24)
MOSFET Inverter: AOTF12N60
Power Supply (PSU): 715G3474-2
PWM Power: SG6961 (PFC), NCP1219A (8), TNY277PN-TL (7)
MOSFET Power: 2SK4087LS
MainBoard: 715G3285-1B
IC MainBoard: MST9A885GL, W9412G6IH-4
Tuner: TAF-S710D
Control: IR: 715G3374-1
Specifications 42PFL3604
PHILIPS 42PFL3604
General recommendations for repairing TV LCD
Repair of the PHILIPS TV with the TPS2.2E LA chassis should begin with a careful external inspection of all its components and modules. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
Faults in the 715G3474-2 power module can be expressed in different ways, for example, PHILIPS 42PFL3604 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the 2SK4087LS converter.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller SG6961 (8), NCP1219A (8), TNY277PN-TL (7), which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the PHILIPS 42PFL3604 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. It should be remembered that in cases of disconnection of the inverter protection (for diagnostic purposes) there is a risk of failure of the power elements of the inverter and special care should be taken. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Attention to users! Do-it-yourself repair of the PHILIPS 42PFL3604 TV without the appropriate qualifications and experience can lead to its complete non-repairability !!!!!!!!
Service manual and schematic diagram 42PFL3604/60 Chassis TPS2.2E LA
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).
PSU Advanced
The 715G3474-2 power module is designed using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC assembly is a Step-Up Converter based on the SG6961 PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage evenly over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the PHILIPS 42PFL3604 device:
Installed matrix (LCD panel) LC420WUE-SBA1 or T420HW04 V.0.
The matrix control uses the Timing Controller (T-CON) T420HW04.
To power the backlight, an inverter 715G3474-2 is used, it is controlled by the UBA2071 PWM controller (24). As power elements of the inverter, keys of the AOTF12N60 type are used.
The necessary supply voltages for all nodes of the PHILIPS 42PFL3604 TV are generated by the 715G3474-2 power module or its analogs using SG6961 (PFC), NCP1219A (8), TNY277PN-TL (7) microcircuits and 2SK4087LS 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: LC420WUE-SBA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 1.06B (8-bit + FRC)
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: 18 pcs EEFL Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V