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 5 February 2019

PHILIPS 22HFL3027W LED LCD TV – POWER SUPPLY 715G5309 AND AUDIO OUTPUT SCHEMATIC

Philips 22HFL3027W LED LCD TV – Power supply 715G5309 and audio output schematic

If a board is defective, consult your repair technician to decide if the board has to be exchanged or if it can be repaired on component level.
If your repair technician says the board should be exchanged completely, do not solder on the defective board. Otherwise, it cannot be returned to the O.E.M. supplier for back charging.
Power Supply Unit
All power supplies are a black box for Service. When defective, a new board must be ordered and the defective one must be returned, unless the main fuse of the board is broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market. Consult the Philips Service web portal for the order codes of the boards.
Important delta’s with the xxHFL30xxx/10platform are:
• New power architecture for LED backlight
• “Boost”-signal is now a PWM-signal + continuous variable.
The control signals are:
• Stand-by
• Lamp “on/off”
• DIM (PWM) (not for PSDL)
 [No detailed information is available because of design protection issues.]
The output voltages to the chassis are:
• +5V-STANDBY (Stand-by mode only)
• +12V (on-mode)
• +Vsnd (+24V) (audio power) (on-mode)
• +24V (bolt-on power) (on-mode)
• Output to the display; in case of
- PSL and PSLS (LED-driver outputs)
- PSDL (high frequent) AC-current.
Diversity
The diversity in power supply units is mainly determined by the
diversity in displays.
The following displays can be distinguished:
LED backlight:
- side-view LED without scanning: PSL power board
- side-view LED with scanning: PSLS power board
- direct-view LED without 2D-dimming: PSL power board
- direct-view LED with 2D-dimming: PSDL power board
PSL stands for Power Supply with integrated LED-drivers.
PSLS stands for a Power Supply with integrated LED-drivers with added Scanning functionality (added microcontroller).

PSDL stands for a Power Supply for Direct-view LED backlight with 2D-dimming.
Connector overview
SMPS, Backlight inverter schematic
DC/DC Converters
The on-board DC/DC converters deliver the following voltages (depending on set execution):
• +5V2-STANDBY, permanent voltage for the Stand-by controller, LED/IR receiver and controls;
• +12V, input from the power supply for the panel common (active mode);
• +24V, input from the power supply for the amplifier;
• +1V1, core voltage supply for MTK5366; has to be started up first and switched “off” last
• +1V2, from the power supply for the scaler IC MT5366.
• +1V5, supply voltage for DDR3 (diagram B)
• +3V3, general supply voltage
• +5V-TUN, supply voltage for tuner
• +5V-USB, input intermediate supply voltage for USB Power
• +3V3 from the power supply for the scaler IC MT5366.
Audio output schematic

Click on the pictures to enlarge them
Posted By: FRANK at 01:27
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