REPAIR / SERVICING TV SITRONICS LCD-2770

Technical description and composition of the SITRONICS LCD-2770 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-2770
Panel: V270B1-L01
MainBoard: GLK7.820.004-J02
IC MainBoard: CPU: VCT40X3R F2 000; Eeprom: 24C64, 24c08
Tuner: KSH-148DEA
Appearance
SITRONICS LCD-2770
General repair guidelines for TV LCD
It is advisable to start any repair and diagnostics of the Sitronics LCD-2770 TV with a careful external examination of internal and external elements, including case parts, a display, buttons and cables. Often, according to the external signs and the nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for finding and localizing a malfunction. 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 cases where the Sitronics LCD-2770 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or, what it happens much less often - there is no processor power on the motherboard. 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 breakdown conditions in such situations.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
If the Sitronics LCD-2770 does not have an 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.
Repair of the inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.

It should be remembered! Attempts to repair the Sitronics LCD-2770 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

 The scheme for Sitronics TVs, lcd-2070, lcd-2770, lcd-3270 models can be downloaded here: 

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>   lcd_2070_2770_3270.rar

 Main features of the SITRONICS LCD-2770 device:
Installed matrix (LCD panel) V270B1-L01.
The required supply voltage for all nodes of the SITRONICS LCD-2770 TV is provided by a switching power supply.
MainBoard - the main board (motherboard) is a module GLK7.820.004-J02, using CPU chips: VCT40X3R F2 000; Eeprom: 24C64, 24c08 and others.
The KSH-148DEA tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V270B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 27.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 596.259x335.232 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 14 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V

REPAIR / SERVICING TV SITRONICS LCD-2631W

Technical description and composition of the SITRONICS LCD-2631W TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-2631W
Chassis / Version: E / RSAG.820.383A
Panel: 1280x768 15: 9
Lamp backlight: CCFL
MainBoard: RSAG.820.383A E / RSAG.820.383A
IC MainBoard: GM1501H, SST39VF040, K4D263238F, VPC3230D, 24LC32
Appearance
SITRONICS LCD-2631W
General repair guidelines for TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the Sitronics LCD-2631W TV, both internal and external. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. In some cases, faulty elements can be seen with the naked eye, for example, carbonized resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the TV does not turn on, no indicators on its front panel light or blink. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem may occur only in the absence of processor power, but this happens much less often. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn off, 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 breakdown conditions in such situations.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling resistors of the primary power supply circuit, involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
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 Sitronics LCD-2631W, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or the power converter (inverter) are malfunctioning. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Diagnostics of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). Board repair and chip replacement GM1501H SST39VF040 K4D263238F VPC3230D 24LC32 are carried out with the necessary equipment, and the corresponding element base.

It should be remembered! Attempts to repair the Sitronics LCD-2631W TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

FIRMWARE FOR SPI FLASH  ----------->   Sitronics LCD-2631W E/RSAG.820.383A, Main: RSAG.820.383A E/RSAG.820.383A, Panel: 1280x768 15:9

 TFT technology, Diagonal 26-inch, 1280 x 768, 15: 9 Brightness 450 cd / m2, Dynamic contrast 400: 1: 1, Response time 17 ms, Horizontal viewing angle 176 °
Main features of the SITRONICS LCD-2631W device:
Installed matrix (LCD panel) 1280x768 15: 9.
The required supply voltage for all nodes of the SITRONICS LCD-2631W TV is provided by a switching power supply.
MainBoard - the main board (motherboard) is an RSAG.820.383A module, using microcircuits GM1501H, SST39VF040, K4D263238F, VPC3230D, 24LC32 and others.

REPAIR / SERVICING TV SITRONICS LCD-2033

Technical description and composition of the SITRONICS LCD-2033 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-2033
Chassis / Version: UN.TD6D-1
Panel: V201V1-T03 Rev C2
Lamp backlight: 6 Lamp CCFL
Inverter (backlight): E3701-004005-2 0609
Power Supply (PSU): Adapter 12V
PWM Power: UC3842AN
MOSFET Power: 07N60
MainBoard: CX-NPTD15-01B B.UN.TD6D-1
IC MainBoard: SM5964
Tuner: TDQ3B8T / W126CWA
Appearance
SITRONICS LCD-2033
General repair guidelines for TV LCD
Possible malfunctions
- Sitronics LCD-2033 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light or blink indicators.
Typically, with such manifestations, the defect is caused by faulty elements in the main adapter power module.
The external adapter 12V power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of power switches (07N60) of converters and rectifier diodes for the presence of a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers UC3842AN, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuit should be restored immediately after the repair is completed.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the CX-NPTD15-01B 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SM5964 and replace failed chips with new ones. Some malfunctions can be associated with the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
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 voltage at the terminals of the TDQ3B8T / W126CWA 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.

Once again, we remind users of TV: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.

Screen size 20-inch (50.8 cm), 4: 3 aspect ratio, 640x480 resolution, NICAM stereo sound - 2 x 5 W
Repair MainBoard
The appearance of the MainBoard CX-NPTD15-01B is shown in the figure below:
CX-NPTD15-01B
Main features of the SITRONICS LCD-2033 device:
Installed matrix (LCD panel) V201V1-T03 Rev C2.
The inverter E3701-004005-2 is used to power the backlight.
To power all internal components of the SITRONICS LCD-2033 TV, an external adapter 12V type is used with UC3842AN microchips and 07N60 type power switches.
MainBoard - the main board (motherboard) is a CX-NPTD15-01B module, using SM5964 chips and others.
The TDQ3B8T / W126CWA tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V201V1-T03
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 640x480, VGA
Display Mode: TN, Normally White, Transmissive
Active Area: 408x306 mm
Surface: Antiglare
Brightness: 500 cd / m²
Contrast Ratio: 600: 1
Display Colors: 262K (6-bit), CIE1931 75%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL Without Driver
Signal Interface: TTL (1 ch, 6-bit), 50 pins
Voltage: 5.0V (VCC)

REPAIR / SERVICING TV SITRONICS LCD-2021

Technical description and composition of the SITRONICS LCD-2021 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-2021
Chassis / Version: JUJ7.820.135
Panel: 20 inch
Power Supply (PSU): Adapter 12V
MainBoard: JUJ7.820.135
IC MainBoard: TDA15063H / N1B00 MST518 24LC32
Tuner: TAF5-C2IP1RW
Appearance
SITRONICS LCD-2021
General repair guidelines for TV LCD
It is advisable to start any repair and diagnostics of the Sitronics LCD-2021 TV with a careful external examination of internal and external elements, including case parts, a 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. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In the absence of any signs of operability, when the Sitronics LCD-2021 does not turn on and does not signal anything with the control lights on the panel, the power module is most likely faulty. 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 key.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If the Sitronics LCD-2021 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. 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 inverter itself, including in the secondary rectifier of the main PSU.
Repair of the inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits to be able to make the necessary measurements at the control points of the circuit.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
Repair or diagnostics of the motherboard should be started by checking the power stabilizers. If necessary, update the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips TDA15063H / N1B00 MST518 24LC32, Tuner: TAF5-C2IP1RW and other possible faulty components.

Owners and users of the Sitronics LCD-2021 TV must 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!


SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    SITRONICS LCD-2021

  Main technical specifications:
20-inch diagonal, Resolution 640x480, 4: 3, Brightness 450 cd / m2, Contrast 350: 1, Viewing angle 176 °
Repair MainBoard
The appearance of the MainBoard JUJ7.820.135 is shown in the figure below:
JUJ7.820.135
Main features of the SITRONICS LCD-2021 device:
Installed matrix (LCD-panel) 20 inches.
To power all the internal components of the SITRONICS LCD-2021 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a JUJ7.820.135 module, using TDA15063H / N1B00 MST518 24LC32 chips and others.
The TAF5-C2IP1RW tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV SITRONICS LCD-2011

Technical description and composition of the SITRONICS LCD-2011 TV, panel type and applicable modules. The composition of the modules.
Sitronics
Model: LCD-2011
Panel: 20 inch
PWM Inverter: INV0304 V1.00 P / N: 70200027
Power Supply (PSU): Adapter 12V
MainBoard: RSAG7.820.263A-2, RSAG7.820.234A - 1
IC MainBoard: PW1306-20Q, STV2248, MSP3410
Tuner: TDQ-6F6 / W126H
Appearance
SITRONICS LCD-2011
General repair guidelines for TV LCD
TV Sitronics LCD-2011, like any other, it is advisable to start repairing by examining the internal and external visible physical visual changes. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in soldered terminals of heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
If the TV does not turn on, no indicators on its front panel light or blink. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem may occur only in the absence of processor power, but this happens much less often. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
If the Sitronics LCD-2011 TV does not have an image, but there is sound, then the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Diagnostics of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
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.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements STV2248 MSP3410 PW1306-20Q.

Once again, remind users! Attempts to self-repair a Sitronics LCD-2011 TV without the appropriate qualifications and experience can lead to its complete failure to repair!

All technical documentation on the LCD-2011 model - a service manual with a diagram in pdf format, photos, software (firmware) and repair recommendations can be downloaded in one file:

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    sitronics-lcd-2011.rar

  
20-inch diagonal, 4: 3 screen aspect ratio, 176 ° viewing angle
Main features of the SITRONICS LCD-2011 device:
Installed matrix (LCD-panel) 20 inches.
To power the backlight, a converter is used, controlled by the PWM controller INV0304 V1.00 P / N: 70200027.
An external adapter 12V type is used to power all the internal components of the SITRONICS LCD-2011 TV.
MainBoard - the main board (motherboard) is an RSAG7.820.263A-2 module, using PW1306-20Q, STV2248, MSP3410 and others.
The TDQ-6F6 / W126H tuner provides television reception and channel tuning.

REPAIR / SERVICING TV SITRONICS LCD-2006

Technical description and composition of the SITRONICS LCD-2006 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-2006
Panel: LCD201V02
Lamp backlight: 6 Lamp CCFL
T-CON: tv module ASSY 200500 rev2
Inverter (backlight): JSY200610 IV6201LG-5 rev. 3
Power Supply (PSU): Adapter 12V
PWM Power: BA9741F
MOSFET Power: BD5H1
IC MainBoard: TDA9352PS / N3 / 3, 24C16AN, GM5321, STV6688A, TDA8601TC2, STV8216, TDA7266D, M29F002BB
Tuner: KS-H-146 DEA
Appearance
SITRONICS LCD-2006
General repair guidelines for TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the Sitronics LCD-2006 TV, both internal and external. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
Malfunctions of the adapter power module can be expressed in different ways, for example, Sitronics LCD-2006 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 adapter power supply, you must first check the fuse, and if it breaks, you should check the BD5H1 power switch and rectifier bridge diodes for avalanche (thermal) breakdown.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the BA9741F PWM controller chip or broken resistors in its bundle.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If Sitronics LCD-2006 has no 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.
Repair of the JSY200610 IV6201LG-5 rev.3 inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or open circuits in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.

Once again, we remind users of TV: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    SITRONICS LCD-2006

Main technical specifications:
TFT technology, Diagonal 20-inch, 640 x 480, 4: 3, Response time 25 ms, Brightness 450 cd / m, Dynamic contrast 350: 1: 1, Viewing angle 176 °
Main features of the SITRONICS LCD-2006 device:
Installed matrix (LCD panel) LCD201V02.
The matrix control uses the Timing Controller (T-CON) tv.
To power the backlight used inverter JSY200610.
To power all the internal components of the SITRONICS LCD-2006 TV, an external adapter 12V type is used with BA9741F microchips and BD5H1 type power switches.
MainBoard - the main board (motherboard) includes TDA9352PS / N3 / 3, 24C16AN, GM5321, STV6688A, TDA8601TC2, STV8216, TDA7266D, M29F002BB and others.
The KS-H-146 DEA tuner provides television reception and channel tuning.

REPAIR / SERVICING TV SITRONICS LCD-1701

Technical description and composition of the SITRONICS LCD-1701 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-1701
Panel: M170EN05 V.6
Inverter (backlight): DATA ST-4-1963 4428A4346992
PWM Inverter: SP9741 (16H) PL
Power Supply (PSU): addap LAD6019AB5 12v / 5a
PWM Power: 9435A (8H) PL
MOSFET Power: D1804 (chip)
Appearance
SITRONICS LCD-1701
General repair guidelines for TV LCD
Repairing a Sitronics LCD-1701 TV is best started with a thorough external inspection and troubleshooting. It is advisable to carefully examine the internal and external components. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in soldered terminals of heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
In cases when the Sitronics LCD-1701 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel are lit or blinking, and there are no sounds and no signs of operability when turning on, the addap LAD6019AB5 12v power supply module is most likely to be faulty / 5a or, which is much less common, there is no processor power on the motherboard. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch D1804 (chip) is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. You should also check the rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller 9435A (8n) pl or broken resistors in its wiring.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
In cases where the Sitronics LCD-1701 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Often, attempts to repair the DATA ST-4-1963 4428A4346992 inverter are hampered by the fact that the fault diagnosis 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.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.

For LCD-1701 TV owners, we recommend that you contact qualified professionals with work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    TLM1710EU(Sitronics lcd-1701)

 Main technical specifications:
TFT technology, Diagonal 17-inch, 1024 x 768, 4: 3, Viewing angle 170 °, Number of channels 100, PAL; SECAM, teletext, off timer
Main features of the SITRONICS LCD-1701 device:
Installed matrix (LCD-panel) M170EN05 V.6.
To power the backlight, a DATA inverter is used, it is controlled by the P97 controller SP9741 (16n) pl.
The necessary supply voltages for all nodes of the SITRONICS LCD-1701 television are generated by the addap power supply module or its analogs using 9435A (8n) pl microchips and D1804 type power switches (chip).

REPAIR / SERVICING TV SITRONICS LCD-1502

Technical description and composition of the SITRONICS LCD-1502 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-1502
Chassis / Version: E3703-001007-4
Panel: HSD150MX15-B
Inverter (backlight): BL02020-00A
Power Supply (PSU): LAD6019AB4 ADAPTER 12VDC 4A
MainBoard: E3703-001007-4
IC MainBoard: SAA5264PS / M3 / 0104 AIC1084-33CM MX88L284AEC AD9883A
Tuner: JS-6B2 / 121
Appearance
SITRONICS LCD-1502
General repair guidelines for TV LCD
TV Sitronics LCD-1502, like any other, it is advisable to start repairing by examining the internal and external visible physical visual changes. Many visible signs make it possible to determine the future direction of troubleshooting and localization of the defect. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal on burned-out resistors formed in soldered terminals of heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
If the power supply module malfunctions, external manifestations may be different, for example, the Sitronics LCD-1502 does not turn on at all and there is no indication of the control lights on the front panel. 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 key.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the Sitronics LCD-1502 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.
Diagnostics and repair of the inverter are often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
If the motherboard E3703-001007-4 is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement. In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - SAA5264PS / M3 / 0104 AIC1084-33CM MX88L284AEC AD9883A with new or obviously working ones.

Attention to the owners! Attempts at self-repairing the Sitronics LCD-1502 TV are not recommended by the manufacturer and can lead to serious negative consequences!

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Sitronics LCD-1502

 Main technical specifications:
TFT technology, Diagonal 15-inch, 1024 x 768, 4: 3, Response time 16 ms, Brightness 500 cd / m, Dynamic contrast 500: 1: 1, Grain size 0.297 mm, Viewing angle 160 °
Main features of the SITRONICS LCD-1502 device:
Installed matrix (LCD panel) HSD150MX15-B.
To power the backlight used inverter BL02020-00A.

The formation of the necessary supply voltages for all nodes of the SITRONICS LCD-1502 TV is carried out by the power module LAD6019AB4, or its analogs.
MainBoard - the main board (motherboard) is an E3703-001007-4 module, using SAA5264PS / M3 / 0104 AIC1084-33CM MX88L284AEC AD9883A chips and others.
The JS-6B2 / 121 tuner provides TV reception and channel tuning.

REPAIR / SERVICING TV SITRONICS LCD-1501

Technical description and composition of the SITRONICS LCD-1501 TV, type of panel and applicable modules. The composition of the modules.
Sitronics
Model: LCD-1501
Panel: HSD150MX15
Inverter (backlight): BLIS02020 ver3.0
PWM Inverter: BIT3102A (8)
MOSFET Inverter: AO4404 (8)
MainBoard: E3703-001013-1
IC MainBoard: SAA5264PS / M3 / 0104 MX88L284AEC AIC1084-33CM AC1501
Appearance
SITRONICS LCD-1501
General repair guidelines for TV LCD
It is advisable to start any repair and diagnostics of the Sitronics LCD-1501 TV with a careful external examination of the internal and external elements, including case details, display, buttons and cables. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. 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.
If Sitronics LCD-1501 does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn off, 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 breakdown conditions in such situations.
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.
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
In cases where the Sitronics LCD-1501 TV has lost an image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Repairing the BLIS02020 ver3.0 inverter is difficult because in case of any malfunction or abnormal situation, even if the lamps are unevenly worn, protection is triggered, which turns it off for fire safety purposes. Diagnostics become impossible and protection needs to be disabled.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repairs, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Diagnosis and repair of the E3703-001013-1 motherboard is carried out by checking the performance of power stabilizers or updating the software (software). Repair of the board and replacement of the SAA5264PS / M3 / 0104 MX88L284AEC AIC1084-33CM AC1501 microcircuit are carried out with the necessary equipment and the corresponding element base.

Attention to users! Self-repair of a Sitronics LCD-1501 TV without the appropriate qualifications and experience can lead to its complete non-repairability.

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Sitronics LCD-1501

Main technical specifications:
TFT technology, Diagonal 15-inch, 1024 x 768, 4: 3, Grain size 0.297 mm, Horizontal viewing angle 170 °, Vertical viewing angle 170 °,
Main features of the SITRONICS LCD-1501 device:
Installed matrix (LCD panel) HSD150MX15.
The BLIS02020 inverter is used to power the backlight lamps; it is controlled by the BIT3102A PWM controller (8). As power elements of the inverter, keys of the AO4404 type (8) are used.
The required supply voltage for all nodes of the SITRONICS LCD-1501 TV is provided by a switching power supply.
MainBoard - the main board (motherboard) is an E3703-001013-1 module, using SAA5264PS / M3 / 0104 MX88L284AEC AIC1084-33CM AC1501 chips and others.