Technical description and composition of the THOMSON 32LB030B5 TV, panel type and modules used. The composition of the modules.THOMSON
Model: 32LB030B5
Chassis / Version: 715V1265-J
Panel: V320B1-L01 Rev. C4
Inverter (backlight): VIT70002.60 I320B1-24-V04
Power Supply (PSU): 715T1180-3
PWM Power: TDA4863-2G, L6565D, TOP246YN
MOSFET Power: IRFP460A, STP10N70
MainBoard: 715V1265-J / 1 & 715V1262-K
IC MainBoard: SPV302A-HI022, MST9883C-LF
Tuner: FQ1216ME / IH-5.
Specifications 32LB030B5
THOMSON 32LB030B5
General recommendations for TV LCD repair
Possible malfunctions
- THOMSON 32LB030B5 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
Most often, with similar manifestations, the main power module 715T1180-3 is faulty. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches (IRFP460A, STP10N70) and rectifier diodes for a possible short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short-circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers TDA4863-2G, L6565D, TOP246YN, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- There is no image, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and disappear immediately.
The defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of the lamps or the inverter.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protective circuits must be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the 715V1265-J motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Repair of the board and replacement of the SPV302A-HI022, MST9883C-LF microcircuits are performed if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
FQ1216ME / IH-5 tuner malfunction. is installed after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
The lack of an image in the presence of a signal from THOMSON 32LB030B5 is often caused by a malfunction of the display backlight. Moreover, the problem can be both inside the LCD panel (matrix) V320-L01 Rev. C4, for example, a malfunction of the CCFL (EEFL) lamps, and outside in their power source - the inverter.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Often, to repair the backlight, disassembling the V320-L01 LCD panel is required - a painstaking process that requires special attention and accuracy from the master. In such cases, there is a possibility, with the slightest negligence, to damage the glass or loops and the TV may become unrepairable.
We strongly do not recommend doing such work to owners of TVs and craftsmen who do not have experience in repairing LCD panels! Moreover, at home (at the owner's home).
If there is no image in the presence of backlight, the screen becomes slightly lighter when turned on, and if the TV is open, the light from the lamps can be seen through the holes in the panel case.
In this case, there may be a malfunction inside the panel, damage to strips, loops, the T-CON board (Timing Controller) may be defective. But the main board MainBoard 715V1265-J often turns out to be faulty, a software failure is also possible.
In such cases, the master first of all needs to check the main supply voltage of the panel at the LVDS connector, the fuses on the T-CON board or the panel brackets, as well as the supply and reference voltages for line and column drivers - VGH, VGL, Vcom.
If all of the above measurements are within the normal range, then the oscilloscope needs to track the passage of LVDS signals from MainBoard 715V1265-J, as well as synchronizing signals from T-CON to loops with drivers.
Attention to users! Self-repair of the THOMSON 32LB030B5 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard 715V1265-J is shown in the figure below:
715V1265-J
External view of the power supply
The main features of the THOMSON 32LB030B5 device:
Installed matrix (LCD panel) V320B1-L01 Rev. C4.
The VIT70002.60 inverter is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the THOMSON 32LB030B5 TV is carried out by the 715T1180-3 power module, or its analogs using TDA4863-2G, L6565D, TOP246YN microcircuits and power switches such as IRFP460A, STP10N70.
MainBoard - the main board (motherboard) is a 715V1265-J module, using SPV302A-HI022, MST9883C-LF and others.
Tuner FQ1216ME / IH-5. provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V320B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 32.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 708.954x398.592 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
LCD TV THOMSON 32LB030B5 with LCD V320-L01, 32 "(81 cm) 16: 9 diagonal. Screen brightness of 550 cd / m² is provided by CCFL (EEFL) lamps. Contrast - the ratio of maximum to minimum brightness is not less than 1000: 1. It is possible to view in high quality HD at a resolution of 1366x768 pixels in the 720p standard (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Digital signal formation (graphic format) is performed in the standards 480i, 480p. , 576i, 576p, 720p, 1080i.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, S-Video, component, SCART x2, RGB, VGA. A headphone jack is provided. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV from the network in operating mode is not more than 200 watts.
Dimensions: with stand 1030x563x260 mm,.
TV weight: 20.3 kg.
Attention! THOMSON 32LB030B5 LCD TV panel V320-L01 Rev. C4 is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!