REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Friday 3 April 2020

REPAIR / SERVICING TV TOSHIBA 40SL733G

Technical description and composition of the TOSHIBA 40SL733G TV, type of panel and applicable modules. The composition of the modules.
TOSHIBA LED
Model: 40SL733G
Panel: LTA400HF12
T-CON: S120BMC4LV0.7
LED driver (backlight): SSL460EL01
Power Supply (PSU): DPS-165CP
PWM Power: A6069H (7pin), SSC9502S (18pin), 1607B (PFC)
MOSFET Power: K6A60D
MainBoard: PE0840 V28A001113A1 NP-150TL / NP-150B
IC MainBoard: TC90417XBG LSI, T64D8XBG, MX29LV800CBTC-70G
Tuner: ENG37F04KF
Control: CT90345
Specifications 40SL733
TOSHIBA 40SL733G
General repair guidelines for TV LCD LED
Possible malfunctions
- The TOSHIBA 40SL733G does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In such cases, the fault should be sought first in the DPS-165CP power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the operability of the power switches (K6A60D) of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip A6069H (7pin), SSC9502S (18pin), 1607B (PFC) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In most cases, the malfunction is caused by the lack of a backlight display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the PE0840 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - TC90417XBG LSI, T64D8XBG, MX29LV800CBTC-70G which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the ENG37F04KF tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Owners and users of the TOSHIBA 40SL733G TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!

Service Manuals with Schematic Diagrams 218 pages on models 32SL733, 40SL733, 46SL733


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 DPS-165CP power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC assembly is a Step-Up Converter based on a 1607B PWM controller that evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Key Features of the TOSHIBA 40SL733G:
Installed matrix (LED-panel) LTA400HF12.
The matrix control uses the Timing Controller (T-CON) S120BMC4LV0.7.
The LED driver SSL460EL01 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the TOSHIBA 40SL733G TV are generated by the DPS-165CP power module or its analogs using A6069H (7pin), SSC9502S (18pin), 1607B (PFC) microcircuits and K6A60D type power switches.
MainBoard - the main board (motherboard) is a PE0840 module, using TC90417XBG LSI, T64D8XBG, MX29LV800CBTC-70G and others.
The ENG37F04KF tuner provides television reception and channel tuning.
Information from an alternative source:
TOSHIBA 40SL733G
Panel Type (Matrix): LTA400HF12
Motherboard: PE0840 V28A001113A1 NP-150TL / NP-150B, TC90417XBG, LSI T64D8XBG, MX29LV800CBTC-70G, Tuner: ENG37F04KF
T-con: S120BMC4LV0.7
LED Driver: SSL460EL01, IR: PE0826
PSU: DPS-165CP
Remote control: CT90345
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HF12-T02
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Frequency: 120Hz
Lamp Type: WLED



Brand: TOSHIBA, Model: 40SL733.
Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 4, Internet access, Wi-Fi.
The official Toshiba website has firmware (software update) for the models 40SL733G (10.1.59.6), 40SL733F (10.1.41.9), 40SL733B (10.1.59.5).
The composition includes MainBoard PE0840 V28A001113A1 NP-150TL / NP-150B and LCD panel (matrix) LTA400HF12.
Power Supply Unit (PSU) DPS-165CP Power Supply.

TOSHIBA 40SL733 LED TV with an LTA400HF12 LCD, 40 "(102 cm) diagonal size 16: 9 format. The required screen brightness of 450 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 4000000: 1 is achieved by special control of the LEDs. V This model’s display manufacturing technology uses LED LED backlighting, and the TV’s design and technical capabilities provide for watching broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the 1080p standard (Full HD). High-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: 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), AV, 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 115 watts.
Overall dimensions: with stand 1007x687x329 mm, without stand 1007x639x50 mm.
TV Weight: with stand: 17 kg, without stand: 14.1 kg.
Attention! The TOSHIBA 40SL733 LED TV panel LTA400HF12 is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
Posted By: FRANK at 06:08
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