Technical description and composition of the PHILIPS 20PFL4112S TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 20PFL4112S / 60
Chassis / Version: LC4.1E AB
Panel: LC201V02 (SD) (B1)
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2070 (16)
MOSFET Inverter: D5NM60
Power Supply (PSU): P2005234 BL6L60P3LPL 20101 TCI-D2S F
PWM Power: L6562 (PFC)
MainBoard: 3139_123_60192 3139 123 60192 Wk534.3
IC MainBoard: CPU: TDA15021H1 / N1C91; Scaler: GM5221H-LF; NAND Flash: 29LV040CQC-70G; SOUND: TDA1557AW;
Tuner: UR1316S / A I H-3
PHILIPS
Model: 20PFL4112S / 60
Chassis / Version: LC4.1E AB
Panel: LC201V02 SD D1
Inverter (backlight): integrated into PSU
PWM Inverter: UBA2070T (16)
Power Supply (PSU): P2005234 BL6L60P3LPL TCI-D2S F
PWM Power: L6562 (PFC), TEA1533 (14)
MOSFET Power: P10NK60ZFP, P4NK80ZFP
MainBoard: 3139_123_60192 3139 123 60192 Wk534.3
IC MainBoard: CPU: TDA15021H1 / N1C91; Scaler: GM5221H-LF; NAND Flash: 29LV040CQC-70G; SOUND: TDA1557AW;
Tuner: UR1316S / A I H-3
Specifications 20PFL4112
PHILIPS 20PFL4112S
General recommendations for repairing TV LCD
Repair of the PHILIPS 20PFL4112S / 60 TV is advisable to start with a careful external examination. In this case, both external and internal components of the device should be inspected. Many visible changes make it possible to determine the future direction of troubleshooting and localization of the defect. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If the 20PFL4112S / 60 TV does not turn on, does not make any sounds when turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some PHILIPS models. 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 cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main power supply unit. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the P10NK60ZFP P4NK80ZFP converter, which can be installed separately on the radiator, or integrated with a PWM controller.
It should be remembered that the N-FET keys used in flyback converters rarely fail without their own sake without any reasons that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip L6562 (8) TEA1533 (14) UBA2070T (16) can also cause a breakdown of the power switch of the converter.
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.
If the PHILIPS 20PFL4112S / 60 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 BP (power supply) for an overstated ESR.
Repair of the TCI-D2S F BL6L60P3LPL inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or open circuits in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
We recommend the owners of the 20PFL4112S / 60 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual and schematic diagram 20PFL4112S/60 Chassis LC4.1E AB
MODELS: 15PF4110, 15PF5120, 17PF4310, 20PF4110, 20PF4310, 20PF5120, 20PF5320, 23PF5320
The appearance of MainBoard 3139_123_60192 is shown in the figure below:3139_123_60192
3139_123_60192 can be used in TVs:
PHILIPS 20PF4110S/58 (Panel LC201V02 (SD)(B1)), PHILIPS 15PF4121/58 (Panel LC150X02 (TL)(01)), PHILIPS 15PF5120/58 (Panel LC150X02), PHILIPS 15PF5121/58 (Panel IDM69E1S51718 Rev:01 QD15XL16 ), PHILIPS 15PF5121/58 (Panel T150XG01 V.3), PHILIPS 20HF5474/10 (Panel LC201V02 (SD)(D1)), PHILIPS 20PF4121/58 (Panel LC201V02 (SD)(B1)), PHILIPS 20PF5120/58 (Panel A201SN02 V4), PHILIPS 20PF5320/58 (Panel LC200WX1 (SL)(01)), PHILIPS 20PFL4101S/60 (Panel LC201V02 SD B1), PHILIPS 20PFL4102S/60 (Panel LC201V02 (SD)(D1)), PHILIPS 20PFL4102S/60 (Panel LC201V02 (CD)(B1)), PHILIPS 20PFL4112S/60 (Panel LC201V02 (SD)(B1)), PHILIPS 20PFL4112S/60 (Panel LC201V02 SD D1), PHILIPS 20PFL4122/58 (Panel A201SN02 V.5), PHILIPS 20PFL5122/58 (Panel A201SN02 V.5), PHILIPS 23PFL5322/58 (Panel T230XW01 V.3), PHILIPS 23PF4321/58 (Panel T230XW01 V.2).
PSU Advanced
The P2005234 power module is made using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC is a Step-Up Converter based on a L6562 PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage 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 20PFL4112S device:
Installed matrix (LCD panel) LC201V02 SD D1.
To power the backlight lamps, a converter is used, combined with a power supply unit, controlled by a UBA2070T PWM controller (16).
The necessary supply voltages for all nodes of the PHILIPS 20PFL4112S TV are generated by the P2005234 power module or its analogs using L6562 (PFC), TEA1533 (14) microcircuits and P10NK60ZFP, P4NK80ZFP type power switches.
MainBoard - the main board (motherboard) is a module 3139_123_60192, using CPU chips: TDA15021H1 / N1C91; Scaler: GM5221H-LF; NAND Flash: 29LV040CQC-70G; SOUND: TDA1557AW; and others.
The tuner UR1316S / A I H-3 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC201V02-SDD1
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 640x480, VGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 408x306 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 12/13 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: CMOS (1 ch, 8-bit), 41 pins
Voltage: 12.0V
