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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Monday 9 March 2020

REPAIR / SERVICING TV SONY KDL-46HX753

Technical description and composition of the SONY KDL-46HX753 TV, panel type and applicable modules. The composition of the modules.
SONY LED
Model: KDL-46HX753
Panel: LTY460HQ05
LED backlight: 2012SLS46 7030 44 L / R REV1.1
T-CON: WQL-C4LV0.1; CXD4737GB, I7939A, 2402WP, 25Q80BVSIG, BM81203
LED driver (backlight): integrated into PSU
PWM LED driver: CXA3834M
Power Supply (PSU): APS-315 1-886-049-22
PWM Power: MIP2H2, A3810M
MOSFET Power: K15A50D, SFAF508G, K8A50D, STPS20LCD45C
MainBoard: 1-885-388-51
IC MainBoard: CXD4727GB, K4B2G1646C-HCH9, KFM4G16Q4B, SIL9287BCNU, GL850G, D2826ER, TPA6138, PS54425
Tuner: Tuner
Technical Specifications KDL-46HX753
SONY KDL-46HX753
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SONY KDL-46HX753 TV does not turn on. The control lights do not light or flash. The TV does not react to the remote control and buttons on the control panel.
With such manifestations, a defect can be caused by faulty elements in the APS-315 main power module. Then it is necessary to measure its secondary supply voltages and, if they are absent, it is necessary to check the serviceability of all power power switches (K15A50D, SFAF508G, K8A50D, STPS20LCD45C) and rectifier diodes of the converters for the presence of a probable short circuit.
In case of any breakdown of the diodes in the secondary circuits, the converter can operate in an emergency short circuit mode, and during a short circuit in the power elements of the primary circuit, the main fuse or a current sensor at the source of the key 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, which can cause exceeding the maximum permissible parameters of the key. The PWM chip A3810M can also cause a malfunction of the power switches 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 on and immediately disappears
As a rule, in such cases there is no display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 1-885-388-51 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace 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 CXD4727GB, K4B2G1646C-HCH9, KFM4G16Q4B, SIL9287BCNU, GL850G, D2826ER, TPA6138, PS54425 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Tuner malfunction Tuner is installed after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, we remind TV users: 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.
SERVICE Manual 145 pages of 2012 FOR  the model -------------------->  KDL-32HX750, KDL-32HX751, KDL-32HX753, KDL-32HX755, KDL-32HX757, KDL-32HX758, KDL-32HX759, KDL-40HX750, KDL-40HX751, KDL-40HX751, 40HX755, KDL-40HX756, KDL-40HX757, KDL-40HX758, KDL-40HX759, KDL-40HX75G, KDL-46HX750, KDL-46HX751, KDL-46HX753, KDL-46HX755, KDL-46HX755, KDL-46HX755, KDL-46HX755, KDL-46HX755, KDL-46HX755, KDL-46HX755, KDL-46HX755, 46D KDL-46HX759, KDL-46HX75G, KDL-55HX750, KDL-55HX751, KDL-55HX753, KDL-55HX755, KDL-55HX75G.


The appearance of MainBoard 1-885-388-51 is shown in the figure below:
1-885-388-51
1-885-388-51 can be used in TVs:
SONY KDL-46HX853 (Panel FQLR460LT01 A-1853-359-B), SONY KDL-40EX653 (Panel LTY400HM10), SONY KDL-40HX853 (Panel FQLR400LT01), SONY KDL-55HX753 (Panel LTY550HQ04), SONY KDL-46HX753 (Panel LTY460HQ05).
The appearance of the power supply
Main features of the device SONY KDL-46HX753:
Installed matrix (LED-panel) LTY460HQ05.
The matrix management uses the Timing Controller (T-CON) WQL-C4LV0.1 ;.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a CXA3834M PWM controller.
The necessary supply voltages for all nodes of the SONY KDL-46HX753 TV are generated by the APS-315 power module or its analogs using MIP2H2, A3810M microcircuits and power switches of the K15A50D, SFAF508G, K8A50D, STPS20LCD45C type.
MainBoard - the main board (motherboard) is a module 1-885-388-51, using microcircuits CXD4727GB, K4B2G1646C-HCH9, KFM4G16Q4B, SIL9287BCNU, GL850G, D2826ER, TPA6138, PS54425 and others.
The Tuner provides TV reception and channel tuning.
Information from an alternative source:
LED SONY KDL-46HX753
Panel Type (Matrix): LTY460HQ05,
Motherboard: 1-885-388-51, CXD4727GB, K4B2G1646C-HCH9 x2, KFM4G16Q4B, SIL9287BCNU, GL850G, D2826ER, TDK 6T216LFA, Y175, TPA6138, PS54425,
T-con: WQL-C4LV0.1, CXD4737GB, I7939A, 2402WP, 25Q80BVSIG, BM81203, WiFi: MDK 338V-0W, DWM-W046 1-458-355-21
PSU: APS-315 1-886-049-22, MIP2H2, A3810M, CXA3834M, K15A50D, SFAF508G, K8A50D x3, STPS20LCD45C
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY460HQ05-A01
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Antiglare (Haze 2.3%), Hard coating (2H)
Brightness: 450 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 1.07B (10-bit), CIE1931 72%
Response Time: 3.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 65 pins
Voltage: 12.0V
Posted By: FRANK at 07:34
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