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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Saturday 7 March 2020

REPAIR / SERVICING TV SONY KDL-40EX600

Technical description and composition of the TV SONY KDL-40EX600, type of panel and applicable modules. The composition of the modules.
SONY
Model: KDL-40EX600
Chassis / Version: AZ1-K
Panel: LTY400HF06 // LTY400HM02
T-CON: TDPV0.4; CXD4725GB, MAX17122, TPS65191, i7989, 5411TIRE
Inverter (backlight): SSI400_10A01
PWM Inverter: SSI091ASN
Power Supply (PSU): APS-272 GE3B
PWM Power: CXA3809M (PFC & PWM resonant), MIP2H2, NJM2904M (LM358), LV5768M
MOSFET Power: K15A50D (LBS1SO.Q) TK8A50D (LBS1SO.Q) ATP201 TPC8119
MainBoard: 1-881-019-32 BEN
IC MainBoard: Cpu: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2
Tuner: SUT-AE102T
Control: RM-YD034
Technical Specifications KDL-40EX600
SONY KDL-40EX600
General recommendations for repairing TV LCD
Repair and diagnostics of any electronic device, in particular SONY KDL-40EX600, it is advisable to start with a careful external examination of internal and external elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Experienced repairmen are well aware of how ring cracks in soldered terminals look, swollen capacitors, and other causes of problems in electronic devices.
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors K15A50D (LBS1SO.Q) TK8A50D (LBS1SO.Q) ATP201 TPC8119, which are often found in such a breakdown state.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM & PWM resonant CXA3809M chip, MIP2H2, NJM2904M (LM358), LV5768M may also cause a breakdown of the power switch of the converter.
If there is no image when you turn on the SONY KDL-40EX600, 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. All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Repair of the motherboard 1-881-636-21 BEN must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. When repairing an MB board, you must check its components STA339BWS13TR-1-GP MT5388. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Before changing the SUT-AE102T tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
We recommend the owners of the KDL-40EX600 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual / schematic diagram ------------->   Sony KDL-32EX600, KDL-40EX600, KDL-46EX600 Chassis AZ1-K


 The appearance of MainBoard 1-881-019-32 is shown in the figure below:
1-881-019-32
1-881-019-32 can be used in TVs:
SONY KDL-32BX300 (Panel LTY320AP05), SONY KDL-32EX402 (Panel LTY320HM01 03), SONY KDL-40EX402 (Panel LTY400HM01), SONY KDL-40EX600 (Panel LTY400HF06), SONY KDL-46EX402 (Panel LTY460HM01).
PSU Advanced
The KDL-40EX600 model uses the APS-272 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the CXA3809M-T6 PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device SONY KDL-40EX600:
Installed matrix (LCD panel) LTY400HF06 or LTY400HM02.
The matrix control uses the Timing Controller (T-CON) TDPV0.4 ;.
The SSI400_10A01 inverter is used to power the backlight lamps, it is controlled by the SSI091ASN PWM controller.
The necessary supply voltages for all nodes of the SONY KDL-40EX600 TV are generated by the APS-272 power module or its analogs using CXA3809M (PFC & PWM resonant), MIP2H2, NJM2904M (LM358), LV5768M microchips and K15A50D (LBS1SO.Q type power switches) ) TK8A50D (LBS1SO.Q) ATP201 TPC8119.
MainBoard - the main board (motherboard) is a module 1-881-019-32, using Cpu chips: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2 and others.
The SUT-AE102T tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY400HF06
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
Surface: Antiglare (Haze 4.5%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 12/6 (Tr / Td); 6.5 (G to G)
Lamp Type: 10 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 55 pins
Voltage: 12.0V

Posted By: FRANK at 01:54
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