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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Tuesday 10 March 2020

REPAIR / SERVICING TV SONY KLV-23HR2

Technical description and composition of the TV SONY KLV-23HR2, type of panel and applicable modules. The composition of the modules.
SONY
Model: KLV-23HR2
Chassis / Version: AEP
Panel: LC230W01 (A2) (M1)
T-CON: 1-688-790-11
Inverter (backlight): 1-688-801-12 (172283812)
Power Supply (PSU): 1-689-819-13
MainBoard: 1-689-813-13 & 1-689-799-11
IC MainBoard: MB93401A, MSP3411G, SAA5665HL, CXD3802BQ
Control: IR: 1-689-818-13 - 172328413 - A-1405-466-A
Technical Specifications KLV-23HR2
SONY KLV-23HR2
General recommendations for repairing TV LCD
Possible manifestations of defects
- The SONY KLV-23HR2 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
Usually, with such manifestations, the defect is caused by faulty elements in the main power module 1-689-819-13. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse 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, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the motherboard 1-689-813-13 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software).
Owners and users of the SONY KLV-23HR2 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 manual / schematic diagram SONY KLV-23HR2 Chassis AEP  

 The appearance of MainBoard 1-689-813-13 is shown in the figure below:
1-689-813-13
Main features of the device SONY KLV-23HR2:
Installed matrix (LCD panel) LC230W01 (A2) (M1).
The matrix control uses the Timing Controller (T-CON) 1-688-790-11.
An inverter 1-688-801-12 is used to power the backlight.
The formation of the necessary supply voltages for all nodes of the SONY KLV-23HR2 TV is carried out by the power module 1-689-819-13, or its analogues.
MainBoard - the main board (motherboard) is a module 1-689-813-13, using microchips MB93401A, MSP3411G, SAA5665HL, CXD3802BQ and others.


 SONY KLV-23HR2 TV with LC230W01 LCD, 23 "diagonal size, 16: 9 format. The input analog video signal can be processed in PAL, SECAM, NTSC systems.
The power of the acoustic system of sound is 9 W (2x2.6 + 3.8 W). 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, SCART x2.
Overall dimensions: 598x506x230 mm.
The mass of the TV: 11.2 kg.
Attention! The LC230W01 (A2) (M1) panel of the SONY KLV-23HR2 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
Posted By: FRANK at 08:30
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