Technical description and composition of the TV SONY KLV-L23M1, type of panel and applicable modules. The composition of the modules.SONY
Model: KLV-L23M1
Chassis / Version: AT2 CHASSIS
Panel: LTA230W1-L01
T-CON: 1-688-790-21 / 230W1C4LV0.5S
Inverter (backlight): KLS-230SS REV: 0.4
Power Supply (PSU): 1-861-869-11 (1-724-086-11)
PWM Power: MCZ3001U, STR-A6459
MOSFET Power: 2SK3555
MainBoard: 1-864-013-11 (172491111)
IC MainBoard: SAA5665HL / M1D / 0724, M24C16, MSP3411G, TDA7263
Tuner: BTF-EF412 8-598-536-20
Control: IR: 1-864-015-11 (172491111) A-1065-133-A
Technical Specifications KLV-L23M1
SONY KLV-L23M1
General recommendations for repairing TV LCD
Possible malfunctions
- The SONY KLV-L23M1 TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or to the remote control.
With similar manifestations, in some cases, the power module 1-861-869-11 is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (2SK3555) and the rectifier diodes of the converters for a probable short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often 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 the excess of maximum current or voltage values. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) MCZ3001U, STR-A6459, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-864-013-11 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Board repair and replacement of SAA5665HL / M1D / 0724, M24C16, MSP3411G, TDA7263 microcircuits are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the BTF-EF412 8-598-536-20 tuner may malfunction. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
Service / Schematic manual -----------------> SONY KLV-L23M1 Chassis AT2 CHASSIS
The appearance of MainBoard 1-864-013-11 is shown in the figure below:1-864-013-11
The appearance of the power supply
Main features of the device SONY KLV-L23M1:
Installed matrix (LCD panel) LTA230W1-L01.
The matrix control uses the Timing Controller (T-CON) 1-688-790-21.
To power the backlight used inverter KLS-230SS.
The necessary supply voltages for all nodes of the SONY KLV-L23M1 TV are generated by the power module 1-861-869-11, or its analogs using microchips MCZ3001U, STR-A6459 and power switches of the type 2SK3555.
MainBoard - the main board (motherboard) is a module 1-864-013-11, using microchips SAA5665HL / M1D / 0724, M24C16, MSP3411G, TDA7263 and others.
The BTF-EF412 8-598-536-20 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA230W1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1280x720, WXGA
Active Area: 508.125x285.696 mm
Display Colors: 16.7M (8-bit)
Briefly from the TV: LCD, 23 ", 1366x768, sound: 20 watts.
The composition uses MainBoard 1-864-013-11 (172491111) and LCD-panel LTA230W1-L01.
Power Supply Unit (PSU) 1-861-869-11 (1-724-086-11) Power Supply.
SONY KLV-L23M1 TV with LCD display LTA230W1-L01, diagonal size 23 "format 16: 9. The input analog video signal can be processed in PAL, SECAM, NTSC systems.
The power of the sound speaker system 20 W (2x10W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART x2. An output for connecting headphones is provided.
Attention! The LTA230W1-L01 panel of the SONY KLV-L23M1 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Recommendations to users of SONY KLV-L23M1
In some cases, before calling the repair service, you should make sure that your TV is really defective.
If the SONY KLV-L23M1 does not turn on or turns off periodically, it is useful to check the sockets and extension cords at the points where the TV is connected to the network, for example, using a desk lamp, hair dryer, or other improvised household appliance.
If the SONY KLV-L23M1 does not respond to the remote, but is controlled by the buttons on the panel, there is a possibility of a malfunction of the remote control (the remote does not work). It is useful to check or replace batteries in it.
If in the viewing mode of television programs a notification of the absence of a signal appears (no signal), you can check the antenna connections and the performance of the TV from other external devices.
If there is no sound when viewing analog cable programs, you should check the sound system in the settings. For Russia, D / K (6.5 MHz), for European countries B / G (5.5 MHz). In modern TVs, a region is usually chosen to set the color and sound standards - for , “East Europe” (Eastern Europe).
If SONY KLV-L23M1 is frozen, does not respond to the remote control and the control panel buttons, sometimes a processor reboot helps - reset. To do this, you must completely disconnect the TV from the network by pulling the plug from the outlet, and turn it on after 10-15 seconds.
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