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What are the internal DC voltages supplied to the main board by the internal power supply and what voltages run on the red, orange and green wires that run between the two boards. output current by voltage would also be helpful. This for a dvp 2200

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  • adventures4u Sep 01, 2010

    The DVP-2200 is a upscaler made by Faroudja not a flat panel TV.

  • adventures4u Sep 01, 2010

    Sorry this question is for a Faroudja Native Rate Series box.

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You did not give Name brand or model number printed on back of TV,in order to help you I need this Information Thank You.

Posted on Sep 01, 2010

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1 Answer

Medion PC MT 5 type MEDMT79


Fuse in the plug?
Sounds like a good design...........

[Since I do not know, is this an indication that the power cord's plug, on the surge protector side; has a fuse in it? ]

So what is the method to check a fuse?
Is it the preferred method to eyeball it?
No
A multimeter set to OHM's, should be used to check it. (1K)

"It looks like the fuse element is going across okay"
Not always true. May be present, but not actually be touching one of the ends, and fool you.

Going with the premise that you KNOW;
A) The fuse to be good
B) The power cord TO Power Supply is good.
C) THE receptacle in the surge protector, that you have the power cord plugged into; is good.

Reasoning on the last statement?
I have had Many surge protectors, where just THAT receptacle was bad.
"Hmmm, power LED light is on, so surge protector is on,
router has power, monitor has power, and so does the printer.
Let me plug a table lamp into THAT receptacle, the computer is plugged into........"

Nope! NADA!

Power is KNOWN to be getting TO Power Supply?

Okay. Suggest a simple test now.
This test determines if the problem is the Power Supply; Or the Power On switch.......

The test is to use a jumper wire, on the ATX main power cable's connector.

Do Not know which one the Medion has.
It is either a 20-pin ATX main power cable, or a 24-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

[NOTE* Color of connectors does NOT matter ]

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Whichever one your Power Supply has, look for the GREEN wire.
The Green wire is the Soft Power On wire. (Abbreviated as PS_ON)

The Green wire is Temporarily jumped to ANY Black wire.
ALL Black wires are Ground wires.

The preferred jumper wire is a straightened out paperclip, bent into a U-shape.
Turn the U-shape over.
The top of the U is wrapped a few times with black plastic electrical tape. (Color doesn't matter. It's just that Black is more common)

This taped area is for your fingers, and thumb to hold onto.
The 'Legs' coming down, are what is used.

Power Supply plugged into power, and 20 or 24-pin ATX main power cable; plugged into motherboard.

The BACK of the ATX main power cable's connector, is where the wires go in.
It is the Back of the ATX main power cable's connector, where the U-shaped jumper wire is to be used.

One leg slides down into a socket hole, that has the Green wire in it.
Slides RIGHT NEXT TO the green insulation of the wire, and down into the socket hole.

MUST slide down into the socket hole far enough, that the U-shaped jumper wire touches a female metal terminal; that is on the end of the Green wire.

This is an example of what the female metal terminal connector, looks like,

http://www.mcmelectronics.com/product/28-9420&utm_medium=Affiliate&ref=cj&utm_campaign=CommissionJunction&utm_source=CommissionJunction?utm_expid=8634549-14

Looking back at the Playtool link, look at the middle photo.
There you see the ATX main power cable, unplugged from the motherboard, and you see a FRONT view of the connector.
Here you can make out the open end, of the metal terminal connectors mentioned above.

The jumper wire must touch the Back of this connector.
(Jumper wire has to go Approximately 3/8ths of an inch, down into the socket hole.
.375 inches)

Moving on........

The other leg of the U-shaped jumper wire, goes down into ANY socket hole with a Black wire in it.
ALL Black wires are Ground wires. (Negative)

[This is a DC circuit. There is a Positive, and a Negative.
ALL power wires are Positive wires. ALL Black wires are negative wires. { Ground ]

The Soft Power On circuit uses 5 Volts DC.
In comparison two D cell flashlight batteries produce 3 Volts DC.

NOT stating there may be a small spark!
It's just the way electricity works.
For this reason you may wish to wear a glove, on the jumper wire hand.

The contact period made is no more than 2 seconds.
The Power On switch is a Momentary Contact Switch.

IF, the Power Supply turns on you have a bad Power On switch.
IF, the Power Supply does NOT turn on, you have a bad Power Supply.

The Power Supply in your computer is a Converter.
It converts HIGH AC voltage down to 3 LOW DC voltages;
3.3 Volts DC
5 Volts DC
12 Volts DC

EACH one is a Voltage Power Rail.

Orange wires are 3.3 Volt wires
Red wires are 5 Volts
Yellow wires are 12 Volts
(ALL Black wires are Ground/Negative wires)

EVERY wire that is Orange, is a 3.3 Volt (DC) wire.
ALL Orange wires go back TO the Power Supply.
They all connect TO the 3.3 Volt power rail, in the Power Supply.

EVERY wire that is Red, is a 5 Volt wire.
ALL Red wires connect to the 5 Volt power rail, in the Power Supply.

The same can be said for All Yellow wires.
ALL Yellow wires are 12 Volt wires.
ALL Yellow 12 Volt wires connect to the 12 Volt power rail, in the Power Supply.

IF, just one voltage power rail is weak, the computer will NOT work.

A) If ALL of the LED's were on at once, they would use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts of power.

C) A typical Processor (CPU) can use 51 to 130 Watts of power.
Just depends on what CPU (Processor) it is.

[LED = Light Emitting Diode. It is redundant to refer to it as an LED light. That is saying it is a Light Emitting Diode light ]

That is why you may see LED's light, and maybe fans spin, but no computer working.
NOT enough power to turn the Processor (CPU) on...........

[Just in case you get this far, and this happens]

http://www.directron.com/atxswitch.html

The above ATX power on switch, is used in a LOT of desktop computers.

The Power On button is an assembly. it has the Power On switch, inside it.

For additional questions please post in a Comment.
Or click on Reply at end of solution.

Regards,
joecoolvette

May 11, 2013 | Computers & Internet

1 Answer

Fault finding


Power is going to the motherboard, and you know this by assuming?

An assumption would be you see the Power Supply fan spin, LED lights light up, and maybe computer case fans spin.

Not an assumption, and you would have tested the 3 main voltage power rails, coming out of the Power Supply.

The Power Supply in your computer is an SMPS.
Switched-Mode Power Supply. (Also is known as the short abbreviation - PSU. Power Supply Unit)

http://en.wikipedia.org/wiki/Switched-mode_power_supply

The Power Supply in your computer is a Converter.
It converts HIGH AC voltage into 3 LOW DC voltages.

[Depending on country,
USA = 120 Volts AC. UK = 240 Volts AC. Japan is 100 Volts AC, but may depend on area. Australia = 240 Volts AC. India = 240 Volts AC. HOWEVER, do not write the above in stone. I may have made an error ]

The 3 low main DC Voltages coming out of the Power Supply is;
A) 3.3 Volts DC
B) 5 Volts DC
C) 12 Volts DC

Orange wires carry 3.3 Volts DC
Red wires carry 5 Volts DC
Yellow wires carry 12 Volts DC
ALL Black wires are Ground wires. They can also be called Negative wires.
This is a DC circuit now. There is a Positive, and a Negative.
Orange, Red, and Yellow wires are power wires, and also Positive wires.

The first part of your diagnosis will be to test those 3 main voltage power rails.

[Digressing;
Using an example;
There are many Red wires coming out of the Power Supply.
These are 5 Volt wires. They are Connected TO, the 5 Volt power rail in the Power Supply.
ALL 5 Volt wires end in one place, in the Power Supply.
The 5 Volt power rail.
When you test just ONE red wire, you are testing the entire 5 Volt power rail coming from the Power Supply.

This also goes for the Orange wires, and Yellow wires ]

With the Red 5 Volt wires, and Yellow 12 Volt wires, you could just use a 4-pin Peripheral power cable to check them,

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

Multimeter set to DC Voltage, the red (Positive) probe lead of the multimeter; touches the female metal terminal connector, for the Red wire.

http://www.mcmelectronics.com/product/28-9420&utm_medium=Affiliate&ref=cj&utm_campaign=CommissionJunction&utm_source=CommissionJunction?t=2&utm_expid=8634549-14

The black (Negative) probe lead of the multimeter, touches a female metal terminal connector, that goes to a Black wire.

You should be reading 5 Volts DC.

Same thing for the Yellow 12 Volt wire.

With an Orange 3.3 Volt wire, this changes.
A straightened out paperclip is inserted, down into the BACK of the ATX main power cable's connector; AND into a socket hole with an Orange wire in it.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The straightened out paperclip, slides down into the socket hole, with the Orange wire in it.
Slides down into the socket hole, RIGHT NEXT TO the orange insulation of the wire, and MUST go down far enough; to Touch that female metal terminal connector.

EVERY wire going down into the ATX main power cable's connector, ends in a female metal terminal connector.

Same thing is down with a socket hole that has a Black wire in it.
ALL Black wires are Ground wires. (Negative)
You can choose ANY socket hole that has a Black wire in it.

Now touch the two probe leads of the multimeter, to their respective straightened out paperclips.

Red (Positive) probe lead of multimeter, to straightened out paperclip in Orange wire socket hole.
Black (Negative) probe lead of multimeter, to straightened out paperclip in Back wire socket hole.

You should be reading 3.3 Volts DC.

(Or if your multimeter kit has special probe lead, that would take the place of a straightened out paperclip, of course use it instead)

Know this;
A) If ALL of the LED's ('lights') were on at once, they would use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts of power.

C) A typical CPU (Processor) can use 51 to 130 Watts of power.
Just depends on what Processor (CPU) it is.

This is why a Power Supply with a weak voltage power rail, will not have enough power to turn the Processor ON, but will have enough power to light those simpy LED's, and spin fans.

[LED - Light Emitting Diode ]

Regards,
joecoolvette

May 11, 2013 | Dell Computers & Internet

1 Answer

Power failure of motherboard


"power failure of motherboard"

I'm lost. Since when does a motherboard produce power?

Power failure AT motherboard?

You have tested the 3 main voltage power rails, coming out of the Power Supply?
A) 3.3 Volts DC
B) 5 Volts DC
C) 12 Volts DC

[In comparison two D cell flashlight batteries produce 3 Volts DC ]

http://en.wikipedia.org/wiki/Computer_power_supply#Wiring_diagrams

[ From http://en.wikipedia.org/wiki/Computer_power_supply ]

http://www.gigabyte.com/products/product-page.aspx?pid=2439#ov

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

ALL Orange wires are 3.3 Volts
ALL Red wires are 5 Volts
ALL Yellow wires are 12 Volts.
ALL are DC Voltage

ALL Black wires are Ground wires. Means Negative wires. ( - )
All power wires named above are Positive wires. ( + )

(This is a DC circuit)

Multimeter:
Positive (Red) probe lead to power wires, one at a time.
Negative ( Black) probe lead stays connected to ANY Black wire.

Looking at the Playtool link, observe the photo to the Right.
Shows 24-pin ATX main power cable plugged into motherboard.
This is what you want.

The Back of the connector is where the wires go in.
The Back of the connector, is where the straightened out paperclip goes in.

I straighten out a paperclip, and insert down into the socket hole; of the power wire to be tested.

(Orange, or Red, or Yellow)

Straightened out paperclip, slides RIGHT NEXT TO the existing wire.

Look at middle photo. See the Front of the connector? You can barely make out the ends, of the female metal terminal connectors.
This is a closer look,

http://www.mcmelectronics.com/product/28-9420&utm_medium=Affiliate&ref=cj&utm_campaign=CommissionJunction&utm_source=CommissionJunction

At the bottom of the photo is the Front; of the female metal terminal connector.

At the Top is the Back of the connector.
The straightened out paperclip, MUST slide down into the socket hole; far enough to touch the Back of the connector.

Now do the same for ANY Black wire.
Power Supply now plugged into power, you can now touch the multimeter's probe leads, to the straightened out paperclips.

Two paperclips used at one time.
Test each voltage power rail, one at a time.

When I state Voltage Power Rail;

3.3 Volt power rail.
ALL of those Orange wires end at one central point, in the Power Supply; the 3.3 Volt power rail.

This means you can test ANY Orange wire, and be testing the 3.3 Volt power rail.

Same goes for the 5 Volt power rail. (Red wires)
Same goes for the 12 Volt power rail. (Yellow wires)

What are the voltages? Post back in a Comment.

OR,
Use a KNOWN to be good, Compatible power supply; for a temporary test unit.

Power Supply checks out OK, or you are using a KNOWN to be good, Power Supply?

What do the Electrolytic Capacitors look like? See any bad ones?
(Radial Aluminum Electrolytic Capacitor)

http://capacitorlab.com/visible-failures/index.htm

http://www.youtube.com/watch?v=Lut7MX5Dd_A

For additional questions please post in a Comment.
Regards,
joecoolvette

Mar 25, 2013 | Gigabyte GA-M61VME-S2 Motherboard

1 Answer

Cant start my sharp aquos tv


does the power supply board has complete output dc voltages?.if yes, check the 24v dc voltage supply at inverter board if drop to low voltage then the cause will be the inverter board.

Jul 26, 2012 | Televison & Video

2 Answers

Green LED on board is on but computer will not start


1) Check to see if the problem is the Power On switch, or the Power Supply, first.

Use a multimeter on the two wires coming from the Power On switch.
Perform a continuity test of the switch.

How?
An economical multimeter can be purchased, for as little as $8 to $12. Available in a multitude of stores. An auto parts store is but one example.

Make notes, and a drawing as to where those two wires go, on the Front panel header, on the motherboard. Then disconnect the two wires, and hold them in your hand.

Set the Function knob of the multimeter to OHM's. (1K, or 10K)
Touch the Positive (Red) probe lead of the multimeter to one wire.
Touch the Negative (Black) probe lead of the multimeter, to the other wire.
Press the Power On switch. (Button)

You should see a brief reading on the multimeter scale. (Or readout if the multimeter is digital)
It is brief because the Power On switch is a Momentary Contact Switch.

No reading? Bad ATX power on switch,

http://www.directron.com/atxswitch.html

Good reading? The Power Supply may be bad.
Test the three main voltages coming from the Power Supply.

[NOTE*
The Switched-Mode Power Supply, (SMPS), in your computer, is a power converter. It converts AC electricity from your home, or business, into three LOW DC voltages.

The shock hazard is IN the Power Supply's case. Not from the low DC voltages it produces ]

A) 3.3 Volt power rail
B) 5 Volt power rail
C) 12 Volt power rail

Test at the 20-pin ATX main power cable's connector,

http://usa.asus.com/Motherboards/AMD_Socket_754/K8VX_SE/

Photo, shows the white, long 20-pin ATX main power cable connector, on the motherboard. No power cable plugged in.
Two rows of 10 socket holes.
(Above the blue Heatsink that sits on the Northbridge chip )

This is a general example of a 20-pin ATX main power cable, and it's respective connector on the motherboard,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Power cable plugged in as shown in the right photo.
I suggest using a straightened out paper clip, and sticking it down in the socket for the power wire.
This is for the Positive (Red) probe lead of the multimeter, to touch to.

First voltage power wire check:
The multimeter function knob is set to DC Voltage. If just a symbol, the symbol is a dotted line, over a solid line.
IF there is more than one DC Voltage scale, for the Function knob to be set to, set it to the 0 - 50 Volt scale.

The straightened out paperclip, will go down into the BACK of the 20-pin ATX main power cable's connector, RIGHT NEXT to the Orange wire.
Has to go down far enough, to go past the Orange insulation of the wire, and TOUCH the metal terminal down in the bottom.

[Looking at the middle photo, you can see the tips of the metal terminals I am referring to.
Uninstalled, and end not crimped over the wire's insulation, this is what they look like,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

Left side shown, crimps over the insulation of the wire.
The far right side is what you are seeing the tip of, in the middle photo of the Playtool link ]

You can use ANY of the Orange wires you see. ALL are 3.3 Volt wires.
The Negative (Black) probe lead of the Multimeter, touches ANY Black wire.
ALL Black wires are Ground wires.
(Straightened out paperclip, also goes down in the Black wire's socket hole )

Put the straightened out paperclips in the appropriate socket holes, then plug the Power Supply into power. Press the Power On button, and start the Power Supply.

On the DC scale of the multimeter you should be reading VERY close to 3.3 Volts.

Good?
Go to ANY Red wire. ALL Red wires are 5 Volts (DC)
Positive (Red) probe lead of multimeter to straightened out paper clip, down into a socket hole, with ANY red wire.

Negative (Black) probe lead of multimeter to straightened out paperclip, in ANY socket hole with a Black wire.
Reading should be VERY close to 5 Volts. (DC)

Good?
Go to ANY Yellow wire. ALL Yellow wires are 12 Volts. (DC)
Reading should be VERY close to 12 Volts. (11.5 to 12 Volts)

ANY low reading means a bad Power Supply.

Primer:
1) If ALL of the LED lights were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 watts of power.

From your brief diagnoses it looks to be a bad Power Supply.
barely enough to light the green LED light on the motherboard.
Not enough power to even spin fans, much less turn the Processor on.

Power Supply checks out?
Perform a visual check of the Electrolytic Capacitors on the motherboard. Look CLOSE, and you may need a light, and magnifying glass.

http://www.capacitorlab.com/visible-failures/index.htm

Capacitors on the motherboard are used as Filters, and Voltage Regulators.
The one's used as voltage regulators, are in the motherboard voltage regulator circuit.
Some of the one's used in the motherboard voltage regulator circuit, regulate voltage for the Processor.

A Processor MUST have a steady, 'clean', supply of Voltage, and it MUST be kept within a very 'tight' tolerance range. Cannot be too much, or too little, or BIOS will not turn the Processor on.
(Or if on, will not keep it on)

That's an old motherboard. Could be bad capacitors, but I'm more willing to bet on a bad Power Supply.

For additional questions please post in a Comment.
Regards,
joecoolvette

Jul 23, 2012 | ASUS K8V-X SE Motherboard

2 Answers

Front panel connectors


Black or white is negative, color is positive. Pin 1 is usually positive.

Also, If you look closely at the plastic plug, there *should* be a tiny triangle/arrow....that's the "+".

May 18, 2012 | Computers & Internet

1 Answer

I have a dell computer. when i turn on the tower and monitor i get just a black screen on the monitor. i have pushed a few buttons on the bottom of the screen and it just says power save mode please use...


No, it's the Power Supply.

Power Supply has a weak voltage power rail.

The monitor goes to Power Saver mode because it is not receiving a video signal. (No Signal)
This is because the computer is not working.


Dell Support > Dimension 4700 desktop computer > Service Manual,

http://support.dell.com/support/edocs/systems/dim4700/sm/index.htm

Click on the heading - Advanced Troubleshooting

Is the Power On LED light blinking Amber? (Yellow)

Post back in a Comment.

Regards,
joecoolvette

{You can also test the power coming out of the Power Supply.

The Power Supply in your computer is an SMPS.
Switched-Mode Power Supply,

http://en.wikipedia.org/wiki/Switched-mode_power_supply

It converts the AC electricity from your home, or business, into DC electricity.
There are three main voltages produced;

A) 3.3 Volts (3 point 3)
B) 5 Volts
C) 12 Volts
All are DC voltage

Two D cell flashlight batteries produce 3 Volts DC.
(In case you are worried about being shocked.
The 'bad' electricity is contained inside the Power Supply's case)

If you do not have a multimeter, an economical unit can be purchased for around $8 to $12. A LOT of stores carry them. An auto parts store is one example.

Orange wires are 3.3 Volts
Red wires are 5 Volts
Yellow wires are 12 Volts.

ALL 3.3 Volt wires end at the same 3.3 Volt power rail in the Power Supply.
Same with 5 Volt wires, and 12 Volt wires.

You can test ANY Orange wire, or any Red wire, or any Yellow wire.

ANY Black wire you see is a Ground wire.

The red probe lead of the multimeter is the Positive lead. The black probe lead is the Negative lead.

The Positive probe lead is touched to a positive wire.
Orange, Red, or Yellow.

The Negative probe lead is touched to ANY black wire. ALL black wires are a Ground wire.

The function knob on the multimeter is set to DC voltage. (Dotted line over a solid line, with a dotted line under the solid line. The curved S line over a solid line is for AC voltage. This = No)

If there are different scale settings, set the function knob to 0-50 Volts. (DC)

Aug 24, 2011 | Dell Dimension 4700 PC Desktop

1 Answer

Start up light flashes once and it won't power on


Most probable cause is the power supply. Look at the back of the computer, check the voltage settings located near the power cord. This will be the small red tab indicating two different settings, If your in the US it should be set to 115. Also, the power supply should run the internal fan when it is turned on.

To test the power supply try this:

Open your computer case and locate the gray box that is the power supply unit. Trace the wires from the power supply to the boards and devices and disconnect all the cables by unplugging them.

Find the big connector plugged on the the motherboard, make sure it is disconnected and short the two pins: (GREEN & BLACK) Short green pin (14) to GND (any black) to switch power supply ON, disconnect green from GND to switch OFF.

This will switch the power supply, you should hear or see the fan in the power supply spin. If you do not see the fan spinning, and your sure you have shorted the correct wires, you have a faulty power supply. If you see the fan spinning, you can now test the voltage coming out of the power supply.

Place a volt meter on the following colors to test voltage:

The color code for the wires is: Red = +5V, Black = Ground (0V), White = -5V, Yellow = +12V, Blue = -12V, Orange = +3.3V, Purple = +5V Standby (not used), Gray = power is on (output), and Green = Turn DC on (input).

Feb 12, 2011 | HP Pavilion a6110n PC Desktop

1 Answer

Ricoh FT 3013 error code E 21? how can it be fix


· Scanner home position sensor failure
· Defective scanner motor
· Defective main board
· Defective dc power supply board
· Incorrect scanner drive wire position
· FU202 on the dc power supply board open (blown fuse).
- Action -
Turn the main switch off and on.
Check the position of the 1st scanner sensor actuator.
Actuated De-actuated
Does the scanner motor rotate when the main switch is turned on?
No Yes
Correct the scanner drive wire position.
Check the voltage at CN106-2 on the main board.
24 volts 0 volts
Check FU202 on the dc power supply board.
Good No Good
Replace FU202
Replace the dc power supply board.
Check the voltage at CN105-1 and 6 on the main board.
24 volts 0 volts
Replace the main board.

Jun 26, 2009 | Ricoh Aficio 2022 All-In-One Laser Printer

1 Answer

Pin Name Color Description


Yes this is a good list of the voltages to be expected from a newer power supply on just the main header

Apr 01, 2009 | HP Compaq dc7100 PC Desktop

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