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 4 February 2020

REPAIR / SERVICING TV PHILIPS 49PUS7809

Technical description and composition of the PHILIPS 49PUS7809 TV, type of panel and applicable modules. The composition of the modules.
PHILIPS LED
Model: 49PUS7809 / 60
Chassis / Version: QM14.3E LA
Panel: LC490EQE (XG) (F1)
T-CON: 6870C-0502A V14 TM120 UHD Ver0.3
LED driver (backlight): integrated into PSU; 175.6V 630mA
Power Supply (PSU): FSP172-4FS01
PWM Power: B117H (DIP-8 Standby)
MainBoard: 310431366873 3104 313 66873
IC MainBoard: MT5591, H5TQ4G63AFR-PBCR, NT72314
Tuner: PE231ZP
Control: Wi-Fi: WUSND12P
Specifications 49PUS7809
PHILIPS 49PUS7809
General repair guidelines for TV LCD LED
Possible malfunctions
- PHILIPS 49PUS7809 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Often in such cases, the FSP172-4FS01 power module is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable 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 with a 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.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the motherboard 310431366873 should begin by checking the stabilizers and power converters needed to power the chips 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 MT5591, H5TQ4G63AFR-PBCR, NT72314 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner PE231ZP and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention TV owners! Attempts at self-repair of PHILIPS 49PUS7809 are not recommended by the manufacturer and can lead to serious negative consequences!


Service manual and schematic diagram PHILIPS 49PUS7809 Chassis QM14.3E LA



 The appearance of MainBoard 310431366873 is shown in the figure below:
310431366873
310431366873 can be used in TVs:
PHILIPS 49PUS7809/60 (Panel LC490EQE (XG)(F1)), PHILIPS 55PUS7809/60 (Panel LC550EQE (PG)(F1)).
The appearance of the power supply
Main features of the PHILIPS 49PUS7809 device:
Installed matrix (LED-panel) LC490EQE (XG) (F1).
The matrix control uses the Timing Controller (T-CON) 6870C-0502A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the PHILIPS 49PUS7809 television are generated by the FSP172-4FS01 power module, or its analogs using B117H microcircuits (DIP-8 Standby).
MainBoard - the main board (motherboard) is a module 310431366873, using chips MT5591, H5TQ4G63AFR-PBCR, NT72314 and others.
The tuner PE231ZP receives television programs and tunes to channels.
Posted By: FRANK at 05:49
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