Technical description and composition of the SUPRA STV-LC3201W TV, panel type and modules used. The composition of the modules.SUPRA
Model: STV-LC3201W
Chassis / Version: TV3201
Panel: V315B1-L01
T-CON: V315B1-C01; CM2681A-KQ, AS-15G
Inverter (backlight): I315B1-16A
PWM Inverter: OZ964GN, BA10324AF
MOSFET Inverter: AO4614A
Trans Inverter: 4018L, 4013L
Power Supply (PSU): MLT666 REV: 2.8L
PWM Power: MC0628R, L6562D (PFC)
MainBoard: TV3201-ZC01-02 (C)
IC MainBoard: MST9E88L-LF, 25X40V, 24C32
Tuner: JS-6H2-121
STV-LC3201W Specifications
SUPRA STV-LC3201W
General recommendations for TV LCD repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all internal chassis elements, as well as external hull ones. Visible damage to elements can sometimes indicate the direction of searching for a defect even before the necessary measurements are taken. In some cases, defective elements can be seen with the naked eye, for example, charred resistors or swollen sintered capacitors, or electrolytic in rectifier filters. The formed ring cracks in the soldering of the terminals of transformers or heating circuit elements are also frequent sources of many malfunctions with a variety of external manifestations.
In cases where the SUPRA STV-LC3201W TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operation when turned on, the power module is most likely faulty or there is no power processor on the motherboard (typical defect of some SUPRA TV models). In general, first of all, it is necessary to check the electrolytic capacitors of the filters of the secondary rectifiers and the fuse at the mains input. If it is cut off, then the diodes of the rectifier bridge and the key transistor of the converter, which can be located either on a separate radiator or integrated with a PWM controller into a common microcircuit, should be checked for PN-transition breakdown. Options are possible.
Mos-Fet switches used in switching power supplies (SMPS) rarely fail without reasons that must be looked for by checking other circuit elements. Breakdown is often caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or breakdown of resistors in stabilization circuits. The PWM controller microcircuit can also cause the breakdown of the power switch of the converter.
If SUPRA STV-LC3201W has no picture, but there is sound, there is a possibility of a malfunction of the backlight lamps or their power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are in good working order.
When repairing an inverter, it is often necessary to turn off the protection for diagnostics, which, for fire safety purposes, turns it off in any abnormal situation, for example, in the event of a malfunction or uneven wear of the lamps, which significantly complicates the search for a defect.
On the motherboard, in the event of a malfunction, you should first check the operability of all stabilizers or power converters of microcircuits and, if necessary, update the software (software). When repairing the MB board, you need to check its components MST9E88L-LF, 25X40V, 24C32, Tuner JS-6H2-121. Defective elements must be replaced. If BGA chips are installed, their failure is usually localized by warming up. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
Remember! Attempts to self-repair the SUPRA STV-LC3201W TV by users without appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> I315B1-16A Invertor Schematic
The appearance of the MainBoard TV3201-ZC01-02 is shown in the figure below:TV3201-ZC01-02
TV3201-ZC01-02 can be used in TVs:
SUPRA STV-LC2601W (Panel V260B1-L02 REV.C1), SUPRA STV-LC2602WD (Panel 26 "), SUPRA STV-LC3201W (Panel V315B1-L01), SUPRA STV-LC3202W (Panel V315B1-L01).
Additionally by PSU
The MLT666 power supply module uses a Power Factor Correction (PFC) circuit to eliminate multiple AC harmonics introduced by the device into the mains. The PFC unit is a Step-Up Converter based on the L6562D PWM regulator, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the mains rectifier filter within the 50 Hz period. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the mains frequency), but by the elements of the converter. As a result, a change in the pulse amplitude (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The serviceability of the PFC unit is indicated by the presence of an increased voltage (about + 380V) in operating mode on the capacitor of the mains filter.
External view of the power supply
Main features of SUPRA STV-LC3201W device:
Installed matrix (LCD panel) V315B1-L01.
Matrix control uses Timing Controller (T-CON) V315B1-C01 ;.
To power the backlight lamps, an I315B1-16A inverter is used, controlled by the OZ964GN, BA10324AF PWM controller. The transformer 4018L, 4013L is installed in the inverter converter. The keys of the AO4614A type are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC3201W TV is carried out by the MLT666 power module, or its analogs using MC0628R, L6562D (PFC) microcircuits.
MainBoard - the main board (motherboard) is a TV3201-ZC01-02 module, using MST9E88L-LF, 25X40V, 24C32 and others.
The JS-6H2-121 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V315B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V