Technical description and composition of the TOSHIBA 32HL834R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32HL834R
Panel: LC320EUN (SD) (V1)
LED backlight: 3660L-0373A 32 V6 Edge EHD Rev1.0 1 L-Type / R-Type
T-CON: 6870C-0368 Verv0.6
LED driver (backlight): KLS-E320RABHF06 C Rev0.0 6917L-0065C
PWM LED driver: BD9262EF
MOSFET LED driver: AOD482
Power Supply (PSU): PE-3900-01UN-LF
PWM Power: FSFR1800, FAN7930, A6069H (7)
MOSFET Power: K6A60D
MainBoard: 32AV833 Rev 1.03
IC MainBoard: MSD3704PX-YES-SA, TAS5707L
Tuner: TDKT-G641D 75025625
Control: CT-90326
Specifications 32HL834
TOSHIBA 32HL834R
General repair guidelines for TV LCD LED
It is advisable to start repairing the TOSHIBA 32HL834R TV with a careful external examination of both 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 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.
Sometimes the TOSHIBA 32HL834R TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common PE-3900-01UN-LF power supply module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for 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.
If the TOSHIBA 32HL834R has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LC320EUN (SD) (V1) panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or 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.
Repair or diagnostics of the 32AV833 Rev 1.03 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update 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 MSD3704PX-YES-SA, TAS5707L. BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the TDKT-G641D 75025625 tuner, if there is no tuning for the channels, you must first check the supply voltage at its terminals, including the varicap supply (30-33V).
Attention to the owners! Attempts to self-repair the TOSHIBA 32HL834R TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service Manual 42 pages of 2010 on the models 26EL834G, 26EL834RB, 32EL834B, 32EL834G, 32EL834R, 32HL834G, 32HL834R, 42HL834G, 42HL834R.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32EL833G main 32AV833
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV833G main 32AV833
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)).
The appearance of the power supply
Key Features of the TOSHIBA 32HL834R:
Installed matrix (LED-panel) LC320EUN (SD) (V1).
The matrix control uses the Timing Controller (T-CON) 6870C-0368.
To power the backlight LEDs, the KLS-E320RABHF06 LED driver is used, controlled by the BD9262EF 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 32HL834R TV are generated by the PE-3900-01UN-LF power supply module or its analogs using FSFR1800, FAN7930, A6069H (7) microcircuits and K6A60D type power switches.
MainBoard - the main board (motherboard) is a 32AV833 module, using microchips MSD3704PX-YES-SA, TAS5707L and others.
The TDKT-G641D 75025625 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EUN-SDV1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 360 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V