Technical description and composition of the SAMSUNG LE23R81B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE23R81B LE23R81BX
Chassis / Version: GBP23SEN
Panel: T230XW01 V1
Lamp backlight: 8 Lamp CCFL
T-CON: T230XW01 V1 Control Board
Inverter (backlight): V225-001
Power Supply (PSU): BN44-00158A SMA23-P
PWM Power: VIPer12A (Standby), TDA4863 (PFC), F9222L (PWM)
MainBoard: BN41-00878A BN94-01352Y-1
IC MainBoard: CPU: MT8293AE; Scaler: SDP64; SOUND: NTP-3000
Tuner: BN40-00099A HTM-6C / 235S
Technical Specifications LE23R81B
SAMSUNG LE23R81B
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE23R81B TV does not turn on, does not respond to the remote control and the control panel buttons, indicators do not light up and do not blink.
Usually with such manifestations, the defect is caused by faulty elements in the main power module BN44-00158A. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and 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 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 an excess of the maximum current or voltage. 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) VIPer12A (Standby), TDA4863 (PFC), F9222L (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
A 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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, the breakdown keys and the transformer secondary windings must be ringed in its converter.
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 on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-00878A motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Board repair and replacement of CPU chips: MT8293AE; Scaler: SDP64; SOUND: NTP-3000 are manufactured 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 tuner BN40-00099A HTM-6C / 235S may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. 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.
Attention to users! Self-repair of a SAMSUNG LE23R81B TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-00878A is shown in the figure below:BN41-00878A
BN41-00878A can be used in TVs:
SAMSUNG LE26R81BX LE26R81B LE26R81BS (Panel T260XW02 V.5), SAMSUNG LE26S81BS (Panel V260B1-L04 Rev. C1), SAMSUNG LE32S81B (Panel T315XW02), SAMSUNG LE32S81B (Panel V315B1-L01381, LT01301, LT01BC, Rev. SAMSUNG LE46S81B (Panel LTA460WT-L15 0T1), SAMSUNG LE46S81B (Panel LTA460WT-L15), SAMSUNG LE23R81W (Panel T230XW01 V.1), SAMSUNG LE26R82B (Panel T260XW02 V.5), SAMSUNG LE231XB01BW1B231BWBB81B23B81B23B81B23B81B23BX1B231
The appearance of the power supply
Main features of the SAMSUNG LE23R81B device:
Installed matrix (LCD panel) T230XW01 V1.
The matrix control uses the Timing Controller (T-CON) T230XW01.
To power the backlight used inverter V225-001.
The necessary supply voltages for all nodes of the SAMSUNG LE23R81B TV are generated by the BN44-00158A power module or its analogs using VIPer12A (Standby), TDA4863 (PFC), F9222L (PWM) microcircuits.
MainBoard - the main board (motherboard) is a BN41-00878A module, using CPU chips: MT8293AE; Scaler: SDP64; SOUND: NTP-3000 and others.
Tuner BN40-00099A HTM-6C / 235S provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T230XW01 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 508.152x285.696 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 7/1 (Tr / Td)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V