Technical description and composition of the SAMSUNG LE23R81W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE23R81W
Panel: T230XW01 V.1
Inverter (backlight): V225-001
PWM Inverter: OZ964SN
Power Supply (PSU): BN44-00158A SMA23-P
PWM Power: F9222L, VIPer12A (Standby), TDA4863 (PFC)
MainBoard: BN41-00878A BN94-01184Q
IC MainBoard: CPU: MT8293AE; Scaler: SDP64; SOUND: NTP-3000;
Tuner: HTM-6C / 235S BN40-00099A
Appearance
SAMSUNG LE23R81W
General repair guidelines for TV LCD
SAMSUNG LE23R81W, like other televisions, it is advisable to start repairing with inspection of external and internal elements and modules. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, there is not the slightest sign of operability - the most likely malfunction is in the power module. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the converter. The complete inoperability of the power supply unit can be caused by a short circuit in the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the SAMSUNG LE23R81W TV does not have an image, but there is sound, make sure that the backlight power converter (inverter) is working properly. It is also necessary to check the electrolytic capacitors of the filter of the BP secondary rectifiers (power supply) for an overstated ESR. When disabling protection in order to enable the diagnosis of a malfunction, special care should be taken, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
If the motherboard BN41-00878A is faulty, first of all it is necessary to check all the linear stabilizers and power converters of its chips, and also, if necessary, update the software (software). Sometimes you can check the health of MB only by replacement. Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MT8293AE; Scaler: SDP64; SOUND: NTP-3000; It requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If the TV works normally with external devices, but does not tune into television channels, the tuner HTM-6C / 235S BN40-00099A 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 the owners! Attempts at self-repair of the SAMSUNG LE23R81W TV are not recommended by the manufacturer and can lead to serious negative consequences!
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
PSU Advanced
The power module BN44-00158A is made using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC node is a Step-Up Converter based on a TDA4863 PWM controller that evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of the increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG LE23R81W device:
Installed matrix (LCD panel) T230XW01 V.1.
To power the backlight, an inverter V225-001 is used, it is controlled by the PWM controller OZ964SN.
The necessary supply voltages for all nodes of the SAMSUNG LE23R81W TV are generated by the BN44-00158A power module or its analogs using F9222L, VIPer12A (Standby), TDA4863 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a BN41-00878A module, using CPU chips: MT8293AE; Scaler: SDP64; SOUND: NTP-3000; and others.
The tuner HTM-6C / 235S BN40-00099A 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
