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 6 March 2020

REPAIR / SERVICING TV SONY KDL-32V4500

Technical description and composition of the SONY KDL-32V4500 TV, panel type and applicable modules. The composition of the modules.
SONY
Model: KDL-32V4500
Chassis / Version: EG1L
Panel: LTZ320AA01
T-CON: 320WTC2LV8.4
Inverter (backlight): SSI320_12C01
PWM Inverter: OZ9966SN
MOSFET Inverter: APM4008N
Power Supply (PSU): DPS-205CP
PWM Power: DLA001D (16pin), DAS001 (8pin), L6562D (PFC), DAS01A
MOSFET Power: APM008N, K3569, P20NM60PF
MainBoard: 1-875-656-22
IC MainBoard: MB90F334, K9F5608U0D, CXB1444R, TPA3100D2
Tuner: BTF-HF412T
Control: IR: 1-876-417-11
Technical Specifications KDL-32V4500
SONY KDL-32V4500
General recommendations for repairing TV LCD
Possible malfunctions
- The SONY KDL-32V4500 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Failure in such cases should begin to be sought in the DPS-205CP power supply circuits. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of power switches (APM008N, K3569, P20NM60PF) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits (PWM) DLA001D (16pin), DAS001 (8pin), L6562D (PFC), DAS01A are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
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.
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 circuits should be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the 1-875-656-22 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). Board repair and replacement of chips MB90F334, K9F5608U0D, CXB1444R, TPA3100D2 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the BTF-HF412T tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend the owners of the KDL-32V4500 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!

Service manual / schematic diagram -------------------> Sony EG1L KDL-26V4500, KDL-32V4500, KDL-37V4500.

PSU / schematic diagram -------------------> DPS-205CP Power Supply

 The appearance of MainBoard 1-875-656-22 is shown in the figure below:
1-875-656-22
1-875-656-22 can be used in TVs:
SONY KDL-26V4000 (Panel LTA260AP01 Y01), SONY KDL-37V4500 (Panel T370XW02 V.C), SONY KDL-32V4500 (Panel LTZ320AA01).
The appearance of the power supply
Main features of the device SONY KDL-32V4500:
Installed matrix (LCD panel) LTZ320AA01.
The matrix control uses the Timing Controller (T-CON) 320WTC2LV8.4.
To power the backlight, an SSI320_12C01 inverter is used, it is controlled by the OZ9966SN PWM controller. As power elements of the inverter, keys of the APM4008N type are used.
The necessary supply voltages for all nodes of the SONY KDL-32V4500 TV are generated by the DPS-205CP power supply module or its analogs using the DLA001D (16pin), DAS001 (8pin), L6562D (PFC), DAS01A microcircuit and power switches of the APM008N, K3569, P20NM60PF type .
MainBoard - the main board (motherboard) is a module 1-875-656-22, using microchips MB90F334, K9F5608U0D, CXB1444R, TPA3100D2 and others.
The BTF-HF412T tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: S-LCD
Model: LTZ320AA01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Posted By: FRANK at 07:36
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