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Repair of the TOSHIBA 23RL933RB TV


Technical description and composition of the TV TOSHIBA 23RL933RB, the type of panel and modules used. The composition of the modules.

Model: 23RL933RB
Chassis / Version: 933
Panel: LC230EUE SE A1
LED driver (backlight): TYL230TE2A01 REV1.0 KJ3-V-0
Power Supply (PSU): PE-3850-01UN-LF B55D-2BB V71A00026100 P20900143
PWM Power: A6069H , NCP1608 , FSFR1800
MainBoard: PE1070 V28A00140701
IC MainBoard: CPU: MSD381USV-V6; DRAM: K4B1G1646; NAND Flash: TC58NVG1S3E; SPI Flash: MX25L1606EM2I
Tuner: ENGS7305D5F

Close specifications! Learn more ...
LCD TV LED Smart 23RL933
Screen diagonal:23 "(58 cm)
Screen Format:16: 9
Update frequency:100 Hz
LED backlight:there, Edge LED
Smart:there is. Wi-Fi support - optional
HD support:1080p Full HD
Brightness:250 cd / m2
Dynamic contrast:1,000,000: 1
Viewing angle:178 °
Pixel response time:14 ms
Progressive scan:there is
TV standards:PAL, SECAM, NTSC
Digital tuner:DVB-T MPEG4, DVB-C
Number of channels:100
Teletext:with memory on 500 p.
DTV Formats:480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Multimedia:MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG
Stereo sound:there is
Sound power:10 W (2x5 W)
Acoustics:two speakers
Interface:AV, component, SCART, RGB, VGA, HDMI x3, USB, Ethernet (RJ-45), WiDi
Headphone jack:there is
TV weight:with stand: 5 kg 
without stand: 4.6 kg
Dimensions:with stand 548x388x183 mm 
without stand 548x342x48 mm
Network consumption:45 W

General recommendations for the repair of TV LCD LED

Diagnosis and repair TOSHIBA 23RL933RB, like other electronic devices, it is recommended to start with an external inspection of external and internal components. Many visible changes in the state of the elements make it possible to determine the future direction of the fault finding and the localization of the defect. In most cases, the cause of the defect and the possible consequences of the repairman can guess the typical signs of typical defects of TVs, for example, the resulting ring cracks in the soldering of the terminals of elements, bloated filter capacitors, rectifiers, charred resistors and other circuit elements.
If the power supply module PE-3850-01UN-LF B55D-2BB V71A00026100 P20900143 fails, the external manifestations may be different, for example, TOSHIBA 23RL933RB does not turn on at all and there is no indication of the control lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. When diagnosing and repairing the power supply, you should first replace the swollen capacitors of the secondary rectifier filter and check the fuse and, if it is interrupted, you must identify the cause. Often in such cases avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes and transistors in the primary circuit.
The reasons for the breakdown of a power switch in a switching power supply (SMPS) can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the primary circuit stabilization circuits, as well as a failure in the operation of the PFM regulator FSFR1800 or breaks of resistors in its piping.
In cases when the TOSHIBA 23RL933RB TV has lost the image, but there is sound and all other functions are working, there is a possibility of a malfunction of the LED driver (converter for powering the LED backlight panel LC230EUE SE A1). When you turn on the TV, the image may briefly appear and disappear immediately. It is necessary to take into account that the LEDs themselves also fail with such manifestations. 
Often there is a need to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and soldering.
When diagnosing it is necessary to take into account that it is impossible to check an open circuit in a circuit of lines of LEDs without disassembling the panels using a tester or a multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source.
In cases of attempts to repair the motherboard PE1070 V28A00140701, it is necessary to check the operation of the stabilizers or power converters of its chips and, if possible, update the software (software). In most cases, BGA chips can be diagnosed using local heating. 

In cases where there is no tuning for local TV channels, you should make sure that the varicaps (30-33V) and other supply voltages are present at the ENGS7305D5F tuner.
Remember! Attempts to self-repair users of the TOSHIBA 23RL933RB TV without appropriate qualifications and the necessary experience can lead to serious negative consequences!

Additional Repair MainBoard

The appearance of the MainBoard PE1070 is shown below:

PE1070 can be used in televisions:
Power Supply Appearance 
The main features of the device TOSHIBA 23RL933RB:
Installed matrix (LED-panel) LC230EUE SE A1. 
The LED driver TYL230TE2A01 is used to power the backlight LEDs. 
The formation of the necessary supply voltages for all nodes of the TOSHIBA 23RL933RB TV is carried out by the power supply module PE-3850-01UN-LF, or its analogs using the A6069H, NCP1608, FSFR1800 chips. 
MainBoard - the main board (motherboard) is a PE1070 module, using CPU chips: MSD381USV-V6; DRAM: K4B1G1646; NAND Flash: TC58NVG1S3E; SPI Flash: MX25L1606EM2I and others. 
Tuner ENGS7305D5F provides reception of television programs and tuning to the channels.

Additional panel technical information:
Brand: LG Display 
Model: LC230EUE-SEA1 
Type: a-Si TFT-LCD, Panel 
Diagonal size: 23.0 inch 
Resolution: 1920x1080, FHD 
Display Mode: S-IPS, Normally Black, Transmissive 
Active Area: 509.184 x286.416 mm 
Surface: Antiglare (Haze 10%), Hard coating (3H) 
Brightness: 250 cd / m² 
Contrast Ratio: 1000: 1 
Display Colors: 16.7M (6-bit + Hi-FRC) 
Response Time: 5 (G to G) 
Frequency: 60Hz 
Lamp Type: 17S2P WLED Without Driver 
Signal Interface: LVDS (2 ch, 8-bit), 30 pins 
Voltage: 5.0V


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