Technical description and composition of the AKIRA LCT-37PBSTP TV, panel type and applicable modules. The composition of the modules.AKIRA
Model: LCT-37PBSTP
Chassis / Version: 782-L37W25-6900
Panel: 37 inch
Power Supply (PSU): KAS200-5S241812XLS
PWM Power: ML4800CS, CP1002PN
MainBoard: 782-L37W25-6900, 782.L27W18-150A
IC MainBoard: M30620SPGP, W29C040P-90B, 24LC32AI, TVP5147, K4D263238F-QC50, SII9011CLU, MSP 3410G BB V3, TPA3008D2
Tuner: JB-6B2 / 122A2-A2 x2
Control: RC-102-OG
Appearance
AKIRA LCT-37PBSTP
General recommendations for repairing TV LCD
Possible malfunctions
- AKIRA LCT-37PBSTP 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.
In the vast majority of such cases, a malfunction is detected in the KAS200-5S241812XLS power supply module. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (MLM) PWM ML4800CS, CP1002PN. It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, 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 their completion it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 782-L37W25-6900 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - M30620SPGP, W29C040P-90B, 24LC32AI, TVP5147, K4D263238F-QC50, SII9011CLU, MSP 3410G BB V3, TPA3008D2 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner JB-6B2 / 122A2-A2 x2 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
TV users and owners need to remember that attempts to self-repair an AKIRA LCT-37PBSTP TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> AKIRA LCT-37PBSTP
Key features of the AKIRA LCT-37PBSTP device:Installed matrix (LCD-panel) 37 inches.
The necessary supply voltages are generated for all nodes of the AKIRA LCT-37PBSTP TV by the KAS200-5S241812XLS power supply module or its analogs using the ML4800CS, CP1002PN microcircuits.
MainBoard - the main board (motherboard) is a module 782-L37W25-6900, using microcircuits M30620SPGP, W29C040P-90B, 24LC32AI, TVP5147, K4D263238F-QC50, SII9011CLU, MSP 3410G BB V3, TPA3008D2 and others.
The tuner JB-6B2 / 122A2-A2 x2 provides the reception of television programs and tuning to channels.
Information from an alternative source:
Akira LCT-37PBSTP The same chassis for SANYO LCD-27XR1 MAIN AV: 782-L37W25-690C, M30620SPGP, SVP EX52 7052 LF, W29C040P-90B (sticker SL32W180), 24LC32AI, TVP5147, K4D263238F9011CL1011
Motherboard: 782.L27W18-150A, MSP 3410G BB V3, TPA3008D2, Tuner: JB-6B2 / 122A2-A2 x2, INPUTS: 782.L37W25-4000
PSU: KAS200-5S241812XLS, ML4800CS, CP1002PN
Remote control: RC-102-OG, PSU diagram KAS200-5S242212,