Technical description and composition of the TOSHIBA 32EL933RB TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32EL933RB
Chassis / Version: 32AV933
Panel: LC320EXN SE A1 75030579 LCD PANEL, LC320EXN-SEA1
LED backlight: 6922L-0010A 32 V12 Edge Rev 1.3 7, 6920L - 0148A
T-CON: LC320EXN-SE1A-K31 6870C-0414A
LED driver (backlight): O 2EAV3 097A A1784
Power Supply (PSU): PE3850-01UN-LF 2401EMF8 Rev05 75030581 POWER BOARD ASSY, 0433-006Y000
PWM Power: FSFR1800,
MainBoard: 32AV933 75030602 PC BOARD ASSY MAIN, 69EB40M0KB01P
IC MainBoard: TA55707, 25Q64AFVS1C, MSD3704PX-LF-VW, RT9043-GB, RT8059GJ5, DRV632PWR, TPA6132A2RTER
Tuner: TDTK-G641D
Control: CT-90326 75014827 REMOCON HAND UNIT,
Specifications 32EL933
TOSHIBA 32EL933RB
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular TOSHIBA 32EL933RB, it is advisable to start with a careful external examination of internal and external elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Experienced repairmen are often aware of the causes of the defect and the 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 32EL933RB TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power supply module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some TOSHIBA models. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the FSFR1800 PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If there is no image when you turn on the TOSHIBA 32EL933RB, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LC320EXN SE A1 75030579 LCD PANEL, LC320EXN-SEA1 panel, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
On the motherboard 32AV933 75030602 PC BOARD ASSY MAIN, 69EB40M0KB01P, tun TDTK-G641D, in case of a malfunction, you should first check the operation of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements TA55707, 25Q64AFVS1C, MSD3704PX-LF-VW, RT9043-GB, RT8059GJ5, DRV632PWR, TPA6132A2RTER requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Typical 32AV933 motherboard defect:
The TV does not enter the operating mode, the red indicator on the panel lights up, DO NOT POWER OFF SCAN appears and the scan scale is turned upside down. Scanning from 0 to 100% takes place, then it starts again from 0% and everything repeats in a circle.
Replacing software from the official site via USB does not help. Replacement and flashing of SPI FLASH 25Q64 is required.
The firmware option from the remont-aud-net website for the LC320EXN (SE) (A1) panel is included.
Winbond SPI FLASH must be replaced with a new one.
Owners and users of the TOSHIBA 32EL933RB TV must remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that may result and to complete non-repairability of the device!
If a failure occurs in the SPI FLASH software from Winbond, we recommend that you replace the chip with a new one. Often, unreadable Winbond microcircuits can temporarily restore their functionality after a strong temperature exposure, for example, heating with a soldering station or a lighter. Sometimes this is enough to read its regular contents.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 19-40/AV/LV/EL/HL/933 Main 32AV933
FIRMWARE FOR SPI FLASH -----------> TOSHIBA 32EL933RB, Main: 32AV933, Panel: LC320EXN
Service Manuals with Schematic Diagrams ------------------> 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 32EL933RB device:
Installed matrix (LED-panel) LC320EXN SE A1 75030579 LCD PANEL, LC320EXN-SEA1.
The matrix control uses the Timing Controller (T-CON) LC320EXN-SE1A-K31.
The LED driver O is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the TOSHIBA 32EL933RB TV are generated by the PE3850-01UN-LF power module or its analogs using FSFR1800 microcircuits,.
MainBoard - the main board (motherboard) is a 32AV933 module, using the TA55707, 25Q64AFVS1C, MSD3704PX-LF-VW, RT9043-GB, RT8059GJ5, DRV632PWR, TPA6132A2RTER and others microcircuits.
The TDTK-G641D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SEA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V