Technical description and composition of the TOSHIBA 32AV833RB TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32AV833RB 32AV834RB
Chassis / Version: 32AV833
Panel: LC320WXN (SC) (C1)
T-CON: LC320WXN SC C1 6870C-0325A; TPS65163, TL2417MC (12v)
Inverter (backlight): LC320WXN 6632L-0626A
PWM Inverter: OZ9966SN
MOSFET Inverter: FDD8447
Trans Inverter: T1-EH32-A 1132260-BJ
Power Supply (PSU): DPS-135JP A 75025189 DPS-92CP // PE3131-02UN-LF 75025188
PWM Power: A6069H (Standby), FSFR1800, DDA010, DDA014 (SSC9502 18pin), NCP1608 (PFC)
MOSFET Power: K6A60D K10A60DR
MainBoard: 32AV833 REV1.03
IC MainBoard: TAS5707L, 25Q64CVSIG, MSD3704PX-LF-SA, FA1EA, G61MB
Tuner: TDTK-G641D
Control: Remote: CT-90326, IR: 32AV833-IRLED REV: 1.01 60EB40R03A03P
Specifications 32AV833
TOSHIBA 32AV833RB
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the TOSHIBA 32AV833RB TV with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
Malfunctions of the power module PE3131-02UN-LF 75025188 // DPS-135JP A 75025189 DPS-92CP can be expressed differently, for example, the TOSHIBA 32AV833RB does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. When diagnosing and repairing the power supply, first of all, it is necessary to 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 or power switch K6A60D K10A60DR.
As a rule, the keys of flyback converters, which are used as an N-Fet field effect transistor on a separate radiator, or integrated with the A6069H PWM controller, the FSFR1800 dezh main // DDA010 (8), DDA014 (SSC9502?) (18), NCP1608 (8) into a single chip, reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the TOSHIBA 32AV833RB has no image, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
In most cases, the diagnosis and repair of the LC320WXN 6632L-0626A inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and when the lamps are depressurized. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Diagnosis and repair of the 32AV833 REV1.03 motherboard is carried out by checking the performance of power stabilizers or updating the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements TAS5707L, 25Q64CVSIG, MSD3704PX-LF-SA, FA1EA, G61MB.
If the TV works normally from external devices, but does not tune into television channels, the TDTK-G641D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention to the owners! Attempts to self-repair the TOSHIBA 32AV833RB TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV833
Service Manuals with Schematic Diagrams 51 pages 2011 on models 32AV833G, 32AV833F, 32AV833N, 32AV833R, 32AV833RB
The appearance of the MainBoard 32AV833 is shown in the figure below:32AV833
32AV833 can be used in TVs:
TOSHIBA 26EL833RB (Panel LC260EXN (SD)(A3) 75023140), TOSHIBA 26EL834RB (Panel LC260EXN SD A3), TOSHIBA 32AV833RB (Panel LC320WXN SCC1), TOSHIBA 32EL833G (Panel LC320EXN (SD)(A2)), TOSHIBA 32EL833R 32EL834R (Panel LC320EXN-SDA2 75023687 LCD PANEL), TOSHIBA 32HL833R (Panel LC320EUN SD V1 75022862 LED), TOSHIBA 32HL834R (Panel LC320EUN (SD)(V1)), TOSHIBA 32LV833RB (Panel T315HW04 V4), TOSHIBA 40LV833RB (Panel V400H1-L10), TOSHIBA 42DB833R (Panel LC420EUN (SD)(V1) 75023049), TOSHIBA 42HL833R (Panel LC420EUN (SD)(V1) LED 75023049), TOSHIBA 42HL834R (Panel LC420EUN (SD)(V1)).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-135JP module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the NCP1608 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the TOSHIBA 32AV833RB device:
Installed matrix (LCD panel) LC320WXN (SC) (C1).
The matrix control uses the Timing Controller (T-CON) LC320WXN.
An LC320WXN inverter is used to power the backlight lamps, it is controlled by the OZ9966SN PWM controller. The transformer T1-EH32-A 1132260-BJ is installed in the inverter converter. As power elements of the inverter, keys of the FDD8447 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 32AV833RB TV are generated by the DPS-135JP power module or its analogs using A6069H (Standby), FSFR1800, DDA010, DDA014 (SSC9502 18pin), NCP1608 (PFC) microcircuits and K6A60D K1060 power switches.
MainBoard - the main board (motherboard) is a 32AV833 module, using TAS5707L, 25Q64CVSIG, MSD3704PX-LF-SA, FA1EA, G61MB and others.
The TDTK-G641D tuner provides television reception and channel tuning.
Information from an alternative source:
TOSHIBA 32AV833RB
Panel Type (Matrix): LC320WXN (SC) (C1)
Motherboard: BTC-202A E2200370, MSD3704PX-LF-SA, HSPS5162GFR, MX25L6445E, Tuner: TDTK-G641D
T-con: LC320WXN-SCC1 P / N: 6870C-0325A
Invertor: LC320WXN 6632L-0626A
PSU: DPS-135JP-A
Remote control: CT-90326
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXN-SCC1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V