Technical description and composition of the PHILIPS 20HFL3330D TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 20HFL3330D
Chassis / Version: TCM2.0E LA
Panel: LC201V02 (SD) (D1)
Inverter (backlight): JSY-200623
PWM Inverter: TL494C
MOSFET Inverter: ME4542
Power Supply (PSU): 40-PWL20C-PWI1XG
PWM Power: NCP1377
MainBoard: 40-LDMK35-MAE2XG
IC MainBoard: V386GLF, SiI9185ACTU, MT8295AE, TDA7266, TDA9886TS, MT5133AN, WM8501GED
Tuner: TDQG4-601A
Technical Specifications 20HFL3330
PHILIPS 20HFL3330D
General recommendations for repairing TV LCD
Possible malfunctions
- PHILIPS 20HFL3330D does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Failure in such cases should be sought in the 40-PWL20C-PWI1XG power supply circuits. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches and rectifier diodes for a probable short circuit.
In the event of breakdowns in the secondary circuits, the converter may emergencyly operate in the short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip NCP1377 can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 40-LDMK35-MAE2XG motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements V386GLF, SiI9185ACTU, MT8295AE, TDA7266, TDA9886TS, MT5133AN, WM8501GED requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If a TDQG4-601A tuner is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
TV users and owners need to remember that attempts to self-repair a PHILIPS 20HFL3330D TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram 20HFL3330D Chassis TCM2.0E LA
The appearance of the MainBoard 40-LDMK35-MAE2XG is shown in the figure below:40-LDMK35-MAE2XG
40-LDMK35-MAE2XG can be used in TVs:
PHILIPS 19PFL5403/60 (Panel M190Z1-L01 Rev.C1), PHILIPS 19PFL5403S/60 (Panel SM19Z11A), PHILIPS 20HFL3330D (Panel LC201V02 (SD)(D1)), PHILIPS 22PFL5403H/60 (Panel M220Z1-L03), PHILIPS 26PFL5403/60 26PFL5403S/60 (Panel V260B1-L11), PHILIPS 19PFL5403D/10 (Panel M190Z1-L01 Rev.C1).
The appearance of the power supply
Main features of the PHILIPS 20HFL3330D device:
Installed matrix (LCD panel) LC201V02 (SD) (D1).
The JSY-200623 inverter is used to power the backlight lamps, it is controlled by the TL494C PWM controller. Keys of type ME4542 are used as power elements of the inverter.
The necessary supply voltages for all nodes of the PHILIPS 20HFL3330D TV are generated by the 40-PWL20C-PWI1XG power supply module, or its analogs using NCP1377 microcircuits.
MainBoard - the main board (motherboard) is a 40-LDMK35-MAE2XG module, using V386GLF, SiI9185ACTU, MT8295AE, TDA7266, TDA9886TS, MT5133AN, WM8501GED and others.
The TDQG4-601A tuner provides TV reception and channel tuning.
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
