Technical description and composition of the TOSHIBA 32AV613DG TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32AV613DG
Chassis / Version: AV613D
Panel: LC320WXN-SBA1
T-CON: LC320WXN-SBA1 control 6870C-0238B
Inverter (backlight): KLS-EE32PIH12 Rev1.1 6632L-0529A
PWM Inverter: BD9897
MOSFET Inverter: FDD8447L (3)
Trans Inverter: L2-EH32D-08925A
Power Supply (PSU): 715G3368-1
PWM Power: A6069H (Standby 7pin), FAN7529 (PFC), L6599D (PWM Resonant)
MOSFET Power: 20N60C3, 2SK4097
MainBoard: 715G3385-1
IC MainBoard: CPU: MST9A885GL
Tuner: TAFT-S710D // FQD1116ME / BM-TPV
Control: CT-90326
Appearance
TOSHIBA 32AV613DG
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the TOSHIBA 32AV613DG TV with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the absence of any signs of operability, when the TOSHIBA 32AV613DG does not turn on and does not signal anything with the control lights on the panel, the power supply module 715G3368-1 is most likely faulty. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in a breakdown state in such situations.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the TOSHIBA 32AV613DG does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often, attempts to repair the KLS-EE32PIH12 Rev1.1 6632L-0529A inverter are hampered by the fact that the diagnosis of the malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
The motherboard 715G3431 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the power supply circuits of the microcircuits are working, a software update may be necessary.
Attention to the owners! Attempts to self-repair the TOSHIBA 32AV613DG TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26/37/32/AV613D
The appearance of the MainBoard 715G3385-1 is shown in the figure below:715G3385-1
715G3385-1 can be used in TVs:
TOSHIBA 26AV605PR (Panel LTA260AP02 004), TOSHIBA 32AV605PR (Panel LK315LA51 75014913), TOSHIBA 32AV613DG (Panel LC320WXN-SBA1), TOSHIBA 37AV605P 37AV605PR (Panel LC370WXN (SB)(B1)).
PSU Advanced
The 32AV613DG model uses a 715G3368-1 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the FAN7529 PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the TOSHIBA 32AV613DG device:
Installed matrix (LCD panel) LC320WXN-SBA1.
The matrix control uses the Timing Controller (T-CON) LC320WXN-SBA1.
To power the backlight, an inverter KLS-EE32PIH12 is used, it is controlled by the BD9897 PWM controller. A transformer L2-EH32D-08925A is installed in the inverter converter. As power elements of the inverter, keys of the FDD8447L type (3) are used.
The necessary supply voltages for all nodes of the TOSHIBA 32AV613DG TV are generated by the 715G3368-1 power module or its analogs using A6069H (Standby 7pin), FAN7529 (PFC), L6599D (PWM Resonant) microcircuits and power switches of the type 20N60C3, 2SK4097.
MainBoard - the main board (motherboard) is a 715G3385-1 module, using CPU chips: MST9A885GL and others.
Tuner TAFT-S710D // FQD1116ME / BM-TPV provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXN-SBA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V