Technical description and composition of the TOSHIBA 23EL934RK TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 23EL934RK 23EL933RK
Chassis / Version: 32AV933
Panel: LTM230HT10
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9998BGN
MOSFET LED driver: AOD482
Power Supply (PSU): UE-3470-1SUN-LF
PWM Power: 6754MR (8pin), M101 (6pin)
MOSFET Power: TF7N70, P1504EDG
MainBoard: 32AV933 BD REV: 1.02
IC MainBoard: CPU: MSD3704PX-LF-VW; SPI Flash: W25Q64FVSIG
Tuner: TDTK-G641D (U)
Specifications 23EL934
TOSHIBA 23EL934RK
General repair guidelines for TV LCD LED
It is advisable to start the repair of the TOSHIBA 23EL934RK TV with a careful external examination of both internal and external elements. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. Experienced repairmen are often aware of the causes of the defect and possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
If the power supply module UE-3470-1SUN-LF malfunctions, the external manifestations may be different, for example, the TOSHIBA 23EL934RK does not turn on at all and there is no indication of the indicator 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, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors TF7N70, P1504EDG, AO D482 in the primary circuit.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, 6754MR PWM controller (8), M101 1147 (6), which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but the sound is there and other functions work, there is a high probability of a malfunction of the LED driver (power converter for the LED backlight panel). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
Attention! For users and owners of 23EL934RK TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 19-40/AV/LV/EL/HL/933 32AV933
Service Manuals with Schematic Diagrams 53 pages 2011 on the model 19EL933RB, 19EL934RB, 23EL933RK, 23EL934RK, 26EL933B, 26EL933G, 26EL933RB, 26EL934G, 32EL933B, 32EL933G, 32EL933N, 32EL933RB, 32EL934G, 32EL934RB, 32HL933B, 32HL933G, 32HL933N, 32HL933RK, 40HL933B, 40HL933G, 40HL933N, 40HL933RK, 32AV933G, 32AV933N, 32AV933RB, 32AV934G, 32AV934RB, 32LV933G, 32LV933N, 32LV933RB, 40LV933G, 40LV933N, 40LV933RB.
The appearance of the MainBoard 32AV933 is shown in the figure below:
32AV933
32AV933 can be used in TVs:
TOSHIBA 19EL934RB 19EL933RB (Panel LC185EXE-TEA1), TOSHIBA 23EL934RK 23EL933RK (Panel LTM230HT10), TOSHIBA 26EL933RB (Panel LC260EXN-SDA3 75023140), TOSHIBA 32AV933RB 32AV934RB (Panel LC320WXN-SCC1 ), TOSHIBA 32EL933RB (Panel LC320EXN SE A1 75030579 LCD PANEL LC320EXN-SEA1), TOSHIBA 32EL934RB (Panel LC320EXN SE A1), TOSHIBA 32HL933RK (Panel LTA320HN03 T03), TOSHIBA 32LV933RB (Panel T315HW04 V.4 (REV.6)), TOSHIBA 40HL933RK (Panel LTA400HM22 T01), TOSHIBA 40LV933RB (Panel LTA400HM01 ), TOSHIBA 32L2454RB 32L2453RB (Panel LC320EUJ (FF)(E2)).
Main features of the TOSHIBA 23EL934RK device:
Installed matrix (LED-panel) LTM230HT10.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the OZ9998BGN PWM controller. As power elements of the LED driver, keys of the AOD482 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 23EL934RK TV are generated by the UE-3470-1SUN-LF power module or its analogs using 6754MR (8pin), M101 (6pin) microcircuits and power switches of the TF7N70, P1504EDG type.
MainBoard - the main board (motherboard) is a 32AV933 module using CPU chips: MSD3704PX-LF-VW; SPI Flash: W25Q64FVSIG and others.
The TDTK-G641D (U) tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM230HT10
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 509.76x286.74 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 11S3P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
