Technical description and composition of the SAMSUNG 37A330J1 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: 37A330J1
Chassis / Version: GJE37SE
Panel: T370XW02 VC
T-CON: 37T03-C01 (Gamma AS15-F)
Inverter (backlight): VIT71060.50
PWM Inverter: OZ964GN
Power Supply (PSU): BN44-00220A
PWM Power: TDA4863G (PFC), STR-A6159 (Standby), MC33067P (PWM 16pin)
MOSFET Power: FCPF20N60S, FQPF9N50C
MainBoard: BN41-00982A BN94-01759U
IC MainBoard: CPU: SAMS01; DRAM: EM6A9160TSOA-5G; SPI Flash: MX25L1605AM2I-12G; EEPROM: 24C256;
Tuner: BN40-00116A HTM2-6L2 / 235S
Technical Specifications LE37A330J1
SAMSUNG 37A330J1
General repair guidelines for TV LCD
A malfunction of the power supply is often manifested simply - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. Diagnostics and repair of the power supply should always start with checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse is broken, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the PFC, the main converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
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 for no reason that you should look for by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
In this module, a half-bridge linear converter is used as the main source. Standby mode is implemented by a separate node on the STR-A6159 PWM controller and provides 5.2V power supply in Standby mode.
The PFC (Power Factor Correction) node, controlled by the TDA4863G controller, provides a sinusoidal current consumption with a minimum of higher harmonics and the voltage on the capacitor of the mains rectifier is + 380V.
If the SAMSUNG 37A330J1 does not have an image, but there is sound and the TV is controlled by 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. When disabling protection in order to enable the diagnosis of a malfunction, special care should be taken, 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.
In cases of attempts to repair the BN41-00982A BN94-01759U motherboard, it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed by local heating. Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: SAMS01; DRAM: EM6A9160TSOA-5G; SPI Flash: MX25L1605AM2I-12G; EEPROM: 24C256; It requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the BN40-00116A HTM2-6L2 / 235S tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus.
Once again, remind users! Attempts at self-repair of a SAMSUNG 37A330J1 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
One of the typical defects of the SAMSUNG 37A330J1 TV can occur in the T370XW02 VC panel.
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.
The appearance of the MainBoard BN41-00982A is shown in the figure below:BN41-00982A
BN41-00982A can be used in TVs:
SAMSUNG LE32A330J1 (Panel V315B1-L01 REV.C4 C5), SAMSUNG LE37A430T1 (Panel T370XW02 VC), SAMSUNG LE40A330J1 (Panel T400XW01 V.5), SAMSUNG 37A330J1 (Panel T370XW02 VG01, SAM30, V30, TGV40, SAM30, TGV4, VG, V30, VG, VG, V30, VG, V30) LE26A330J1 LE26A330 (Panel V260B1-L13).
PSU Advanced
The power module BN44-00220A is made using the 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 a TDA4863G 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 the 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 SAMSUNG 37A330J1 device:
Installed matrix (LCD panel) T370XW02 VC.
The matrix control uses the Timing Controller (T-CON) 37T03-C01.
The VIT71060.50 inverter is used to power the backlight lamps, it is controlled by the OZ964GN PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG 37A330J1 TV are generated by the BN44-00220A power module or its analogs using TDA4863G (PFC), STR-A6159 (Standby), MC33067P (PWM 16pin) microcircuits and power switches of the FCPF20N60S, FQPF9N50C type.
MainBoard - the main board (motherboard) is a BN41-00982A module, using CPU chips: SAMS01; DRAM: EM6A9160TSOA-5G; SPI Flash: MX25L1605AM2I-12G; EEPROM: 24C256; and others.
The tuner BN40-00116A HTM2-6L2 / 235S provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T370XW02 VC02
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
