240V to 110V AC Inverter

Using this circuit diagram, can be designed a very simple AC voltage converter, which converts the 240V AC power to a voltage of 110V.

Circuit can be successfully used to power electrical devices that require a supply voltage of 110V. If such a device is a purely resistive load, as electric radiator, letcon the circuit described below will be useful. Basically, this is a regulator that ensures the effective output voltage of 110 V. It can be fixed, of course, at another value for the output voltage, if desired.

The most reliable and accurate method for measuring the load voltage is using a voltmeter with real effective value (which indicates the effective value for voltage harmonic). If the voltage across the load is not correct, we change the value of R2.

Converter can be connected / disconnected from the remote by connecting a switch to 240 volts across REMOTE (jumper will be removed). In this case, command can be done with a voltage of 3-32 V, as shown in diagram. The optocoupler circuit presents the great advantage of isolation of control circuit from the network .

If using a TIC226triac type, the converter can supply currents up to 2 A. If the triac is mounted on a heatsink, the current can reach up to 4 A.

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Blu ray Player HARMAN KARDON BDT 3 120V and BDT 30 240V Power Supply Wiring diagram Schematic

Power supply [SMPS] Schematic _ harman/kardon Blu-ray player BDT-3 & BDT-30

SMPS SCHEMATIC  (Click on the pictures to zoom in)

COMMON PROBLEMS

The player won’t power up (the Power indicator is not lit):

*Check that the player’s Ac power cord is properly plugged into the player’s Power cord connector.

* Check that the player’s Ac power cord is plugged into a working Ac out let and that the Ac outlet is not controlled by a switch.

* Make sure that the Master Power switch (on the player’s rear panel) is in the “On” position.

The disc does not play:

* Check that the disc is inserted correctly (label side up).

* Check that the disc is the correct type: Bd-video (single-layer or double-layer), DVD-video, DVD +R/+RW, DVD-R/-RW, cd dA (cd digital audio), cd-R/RW.

Other disc types will not play.

No picture:

* Check the connection between the player and the TV.

* Check that the TV is turned on and that it is set to the correct input source.

* Confirm that all of the choices made in the display settings menu are correct for your TV.

* Check that the TV is hdcP-compliant. The player cannot be used with a TV that is not hdcP-compliant.

No sound:

* Check that the HDMI and/or coaxial digital connections are properly made.

* If you’re using the coaxial digital connection, check that the digital audio settings on the connected device have been properly set.

* If you’re using only the HDMI connection, check that the HDMI audio settings on the connected device have been properly set.

* If you’re using only the HDMI connection, check that the BDT 3/BDT 30’s HDMI Audio Output is set to “On.

The picture appears in the wrong aspect ratio:

Change the Aspect Ratio setting in the display settings menu to match the TV.

There is noise or other interference in the picture while playing a Blu-ray disc recording or DVD:

Check that the disc surface is clean and not scratched.

Cannot access media on a connected USB device:

• check that the device is formatted in the FAT32 file system. Other file systems are not compatible with the BDT 3/BDT 30.

The player does not respond to remote-control commands:

* Replace both remote-control batteries with fresh ones, and make sure that they are installed correctly.

* Hold the remote control closer to the player.

* Check that the player’s remote sensor is in the remote control’s line of sight.

* Make sure that the protective shipping film has been removed from the player’s front panel.

The player does not respond to commands, or it behaves in an erratic way:

* Unplug the player’s power cord from the AC outlet, wait 30 seconds, and plug it back in.

* The Ø symbol appears on the Lcd when you press a remote-control button:

* The selected function is not permitted at the time you press the button.

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