Technical description and composition of the TOSHIBA 32XV733 TV, panel type and applicable modules. The composition of the modules.Toshiba
Model: 32XV733 32XV733R
Panel: LC320WUD (SC) (G1)
T-CON: 6870C-0328B (SC) (G1)
Inverter (backlight): 6632L-0622A LC320
Power Supply (PSU): DPS-145PP-131 A
PWM Power: NCP1607B (PFC), SSC9502S (PWM 18pin), A6069H (Standby)
MOSFET Power: K3569, K6A60D
MainBoard: PE0840
IC MainBoard: TMP91FW27UG TA5570B Si19287BGNU
Tuner: ENG37F04KF
Control: CT-90344
Specifications 32XV733
TOSHIBA 32XV733
General recommendations for repairing TV LCD
Like any other TV, TOSHIBA 32XV733 repair is advisable to start with an external examination of the visible changes in the external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of 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.
If the power supply module DPS-145PP-131A fails, the external manifestations may be different, for example, the TOSHIBA 32XV733 does not turn on at all and there is no indication of the indicator lights on the front panel. When diagnosing and repairing the DPS-145PP-131A power supply, first of all, it is necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If there is no image when you turn on the TOSHIBA 32XV733, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Repair of the LC320 6632L-0622A inverter is difficult because in case of any malfunction or emergency, even if the lamps wear unevenly, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair or diagnostics of the PE0840 motherboard should be started by checking the power conditioners. If necessary, you should update the software (software).
Once again, remind users! Attempts to independently repair the TOSHIBA 32XV733 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 32/40/46XV733 main PE0840
Service Manuals with Schematic Diagrams 187 pages of 2010 on models 32XV733, 37XV733, 40XV733, 46XV733
The appearance of MainBoard PE0840 is shown in the figure below:PE0840
PE0840 can be used in TVs:
TOSHIBA 40SL733G (Panel LTA400HF12), TOSHIBA 32SL733R (Panel LTA320HF02 75018259 LCD PANEL LED), TOSHIBA 32XV733 (Panel LC320WUD (SC)(G1)), TOSHIBA 40VL733R (Panel LTA400HF12 T04), TOSHIBA 46XV733R (Panel LTA460HJ04 T03).
PSU Advanced
The 32XV733 model uses a DPS-145PP-131 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a step-up converter based on the NCP1607B PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor 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 32XV733 device:
Installed matrix (LCD panel) LC320WUD (SC) (G1).
The matrix control uses the Timing Controller (T-CON) 6870C-0328B.
An inverter is used to power the backlight.
The necessary supply voltages for all nodes of the TOSHIBA 32XV733 TV are generated by the DPS-145PP-131 power supply module or its analogs using NCP1607B (PFC), SSC9502S (PWM 18pin), A6069H (Standby) microcircuits and power switches of the K3569, K6A60D type.
MainBoard - the main board (motherboard) is a PE0840 module, using TMP91FW27UG TA5570B Si19287BGNU chips and others.
The ENG37F04KF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WUD-SCG1
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: 450 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz + 120Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V
TOSHIBA 32XV733 LCD TV with LC320WUD LCD display, 32 "(81 cm) diagonal size in 16: 9 format. 450 cd / m² screen brightness is provided by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio of 50,000: 1 is achieved by special operation control The design and technical capabilities of the TV include viewing programs and movies in high quality HD with a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. The arabic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, JPEG.
The power of the sound system 20 W (2x10 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), audio x2, component, SCART x2, RGB, VGA, HDMI x4, USB x2, Ethernet (RJ-45), Wi-Fi. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV in the operating mode from the network is 114 watts.
Overall dimensions: with stand 786x584x292 mm, without stand 786x525x86 mm.
TV Weight: with stand: 14 kg, without stand: 11.3 kg.
Attention! The TOSHIBA 32XV733 LCD TV panel LC320WUD (SC) (G1) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!