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-46CX520

Technical description and composition of the SONY KDL-46CX520 TV, panel type and applicable modules. The composition of the modules.
SONY
Model: KDL-46CX520
Chassis / Version: AZ2F
Panel: LTY460HN01
T-CON: LPFC041TOA; SM 4109
Inverter (backlight): SS1460_12F01 REV0.2
PWM Inverter: SSI091ASN
Trans Inverter: 340158AD TM x3
Power Supply (PSU): APS-282 (ID) 1-883-861-11 G3 board
PWM Power: L6562, CXD9841P, MIP2H2
MOSFET Power: K15A50D
MainBoard: 1-883-753-32
IC MainBoard: CXD4727GB, K4B2G1646C-HCH9, Gl850g (MN1GD07G21), KFM2GN6Q2B, SII9287BCNU PS54452, D95830, RTL8201ES
Tuner: CXD2825GA
Control: RM-ED045
Technical Specifications KDL-46CX520
SONY KDL-46CX520
General recommendations for repairing TV LCD
Possible manifestations of defects
- The SONY KDL-46CX520 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons
Failure in such cases should begin to be sought in the APS-282 power supply circuits. It is necessary to measure its output voltages, and in case of their absence, check the serviceability of the power switches (K15A50D) of the converters (PFC, main source and standby mode), as well as rectifier diodes for a possible short circuit.
In case of breakdowns of semiconductors in 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, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM microcircuits (PWM) L6562 and CXD9841P can also cause power keys to malfunction and are checked by replacing with obviously good ones.
- 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 backlight elements of the display, or in the power of the lamps or inverter. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the 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 1-883-753-32 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). 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 - CXD4727GB, K4B2G1646C-HCH9, Gl850g (MN1GD07G21), KFM2GN6Q2B, SII9287BCNU PS54452, D95830, RTL8201ES and replace the failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before replacing the CXD2825GA tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention TV owners! Self-repair attempts by SONY KDL-46CX520 are not recommended by the manufacturer and can lead to serious negative consequences!
SONY LCD CCFL lamp TVs, a large number of which were previously sold on the  market, are still in operation. Televisions are quite difficult to repair and are serviced mainly in authorized service centers.

1. Service Manual 63 pages of 2011 FOR the models KDL-22CX520, KDL-32CX520, KDL-32CX523, KDL-40CX520, KDL-40CX523, KDL-46CX520, KDL-46CX523
SCHEMATIC MANUAL ---------------> AZ2G Chassis


2. Service Manual 54 pages of 2011 FOR the models KDL-32CX520, KDL-32CX521, KDL-32CX523, KDL-32CX525, KDL-40CX520, KDL-40CX521, KDL-40CX523, KDL-40CX525, KDL-46DX-46CX525, 46DX-46CX525 .
SCHEMATIC MANUAL ---------------> AZ2F CHASSIS

SCHEMATIC MANUAL --------------->  Sony APS-282 1-883-861-11 board Power supply



 The appearance of MainBoard 1-883-753-32 is shown in the figure below:
1-883-753-32
1-883-753-32 can be used in TVs:
SONY KDL-32CX520 (Panel V315H3-L01), SONY KDL-32EX421 (Panel LTY320AN02), SONY KDL-32EX720 (Panel LTY320HJ01), SONY KDL-40EX521 (Panel LTY400HM08 001), SONY KDL-46EX720 (Panel LTY460HJ05 3D), SONY KDL-46CX520 (Panel LTY460HN01), SONY KDL-40CX521 (Panel LTY400HM07).
The appearance of the power supply
Main features of the device SONY KDL-46CX520:
Installed matrix (LCD panel) LTY460HN01.
The matrix control uses the Timing Controller (T-CON) LPFC041TOA ;.
The SS1460_12F01 inverter is used to power the backlight lamps, it is controlled by the SSI091ASN PWM controller. The transformer 340158AD TM x3 is installed in the inverter converter.
The necessary supply voltages for all nodes of the SONY KDL-46CX520 TV are generated by the APS-282 power module or its analogs using L6562, CXD9841P, MIP2H2 microcircuits and K15A50D type power switches.
MainBoard - the main board (motherboard) is a module 1-883-753-32, using microcircuits CXD4727GB, K4B2G1646C-HCH9, Gl850g (MN1GD07G21), KFM2GN6Q2B, SII9287BCNU PS54452, D95830, and other RTL8201.
The CXD2825GA tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY460HN01
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: SVA, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Antiglare (Haze 5.5%), Hard coating (2H)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 12/8 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Posted By: FRANK at 04:36
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