Technical description and composition of the SAMSUNG LE40A330J1 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE40A330J1
Chassis / Version: GJE26SE * // Ver. AC10
Panel: T400XW01 V.5 // T400XW01 V.6
T-CON: T400XW01 V5 (AS15-F)
Inverter (backlight): 4H.V2358.061-G
Power Supply (PSU): BN44-00197B SIP408D
PWM Power: ICE2QS01, ICE2PCS02G (PFC), LX1692A
MainBoard: BN41-00982B BN94-02122P // BN41-00982A BN94-01759H
IC MainBoard: SiI9185CTU NTP-3100 MAX232EC
Tuner: HTM2-6L2 / 235S BN40-001116A
Control: BN59-00676A, IR BN41-00850A
Technical Specifications LE40A330J1
SAMSUNG LE40A330J1
General repair guidelines for TV LCD
Repair of a SAMSUNG LE40A330J1 TV should be started with a careful external inspection of all its constituent elements, both internal and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. Often, according to the external signs and the nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting and localizing the malfunction before making the necessary measurements and taking oscillograms at control points. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in soldering will help the master to guess the causes and possible consequences of the malfunction.
If the power module BN44-00197B SIP408D malfunctions, the external manifestations may be different, for example, SAMSUNG LE40A330J1 does not turn on at all and there is no indication of the indicator lights on the front panel. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the possibility 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 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 circuits.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SAMSUNG LE40A330J1 does not have an image, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight nodes is likely. Lamps or power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Diagnostics of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is imperative to restore all standard converter protection circuits.
If the motherboard BN94-02122P BN41-00982B is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Owners and users of the SAMSUNG LE40A330J1 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
One of the typical defects of the SAMSUNG LE40A330J1 TV can occur in the panel T400XW01 V.5 // T400XW01 V.6.
External manifestations: color distortion in the image as a negative in the image, light tones predominate. Usually in such cases, the AS15-F gamma corrector is faulty. Another indicator of its malfunction is an excessively strong heating, which in practice allows you to do without measuring the voltage gradations of gray.
In most cases, replacing the AS15-F solves the problem.
It should be remembered that similar symptoms can cause faults in the column drivers of the panel, which is usually indicated by interference in the form of even vertical stripes on the screen. Then, after replacing the AS15-F, the situation does not change. Drivers are in loops and cannot be replaced. In this case, it is necessary to replace the glass panel.
SCHEMATICS ----- > Samsung LE26A33*J**, LE32A33*J*N**, LE32A33*J**, LE37A33*J**, LE40A33*J** Chassis GJE26SE*, GJE32SE*, GJE37SE*, GJE40SE*
PSU SCHEMATICS ----> BN44-00197B Schematic diagram.
The appearance of the MainBoard BN41-00982B is shown in the figure below:BN41-00982B
BN41-00982B can be used in TVs:
SAMSUNG LE32A330J1 (Panel T320HA01-AA), SAMSUNG LE32A430T1 (Panel V315B1-L01), Samsung Panel V260B1-L13), SAMSUNG LE37A330J1 (Panel CLAA370WA03 SJ), SAMSUNG LE26A340J3 (Panel V260B1-L13).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the BN44-00197B module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the ICE2PCS02G PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the mains capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG LE40A330J1 device:
The matrix (LCD panel) T400XW01 V.5 or T400XW01 V.6 is installed.
The matrix control uses the Timing Controller (T-CON) T400XW01.
To power the backlight used inverter 4H.V2358.061-G.
The necessary supply voltages for all nodes of the SAMSUNG LE40A330J1 TV are generated by the BN44-00197B power module or its analogs using ICE2QS01, ICE2PCS02G (PFC), LX1692A microcircuits.
MainBoard - the main board (motherboard) is a BN41-00982B module, using SiI9185CTU NTP-3100 MAX232EC chips and others.
The tuner HTM2-6L2 / 235S BN40-001116A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T400XW01 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 885.168x497.664 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Balance board)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V