Jensen JTM-105A Multimeter, Will not measure AC Voltage, where can I obtain manual.

On the power pack there may be a label that says 12v dc or 18v Dc or some other voltage. There may be a input voltage on the keyboard and a current rating eg 12v DC 1A current or it might be AC voltage of 12V or some value.

get a volt meter or a multimeter and measure the voltage on the plug. positive is the inside part and the outside part is negative. dc setting if dc volts expected or AC setting for if AC voltage expected
Or get power pack tested at a music shop you may have a faulty power pack

Hi yes set the dial to 600 on the DC voltage for 275 Volts DC::: 2000m to 600 Volt DC ::::: dial in photo is pointing to DC voltage.:::::::.black
200 to 500 is AC voltage ::::: right hand side is Ohm's resistance .200 ohm to 2000K- Ohm ..1k-ohm=1000.Ohms.....cheers

Look at adapter, see what output is supposed to be- maybe 12 volts DC? Find a multimeter that will measure DC voltage, and see if the output plug has that across the connector. If you have an ordinary power cord without an adapter, it will have 120 volts AC like any other cord, which you can also measure on AC scale, but be careful as you can get a dangerous shock, just like you can from an ordinary household outlet.
Note: AC voltage may vary by country.

Dear Neil:

Thank you by your request, I hope you are very well.

I am sorry for my delay.

You must proceed with this:

1) Check C. Breaker from your home if tripped, resset , and try again.
2) Check the power cord, for some cable loose or broker, repair or replace the power cord.
3) Now turn on the treadmill, if it does is o.k if doesnot proceed with C.BREAKER of the Treadmill, reset, and try it again.

Of course you must have some DVOM(digital voltmeter) for to Test this.

How to Check AC Volts with a Multimeter

The multimeter is an essential tool for electrical troubleshooting.

A multimeter is a versatile tool for measuring voltage and current. Electricians use multimeters to measure alternating current, or AC, and direct current, or DC, voltages and currents. Many multimeters also measure resistance, capacitance and temperature. For example, an electrician uses the multimeter's AC voltage setting to determine if a wall outlet has power or if a power supply is functioning. This knowledge helps the electrician pinpoint the cause of an electrical problem and select the appropriate repair.
Instructions

1.

• 1

Plug the black voltage probe into the voltmeter jack marked "COM."

• 2

Plug the red voltage probe into the voltmeter jack marked "V."

• 3

Rotate the range selector knob to the highest range setting, which is marked "VAC."

• 4

Turn the voltmeter on. Slide the power switch to the "ON" position.

• 5

Touch the probes to the device for which you measure the AC voltage. Use extreme caution. Ensure that the probes do not come into contact with anything but the surface you are measuring.

• 6

Read the voltmeter's display. Turn the range selector knob to a lower range if voltage is less than the currently selected range

* Additional Help
http://www.youtube.com/watch?v=yX_0vRPdMfU&feature=related

Finally i gave you , indication that you must chekc in you tube for to help you.

Thank you in advance, sincerely.

God bless you.

If you need further assistance, please reach me

E.CUADRA
MANAGUA, NICARAGUA C.A.

Dear Sir:

Thank you by your request, I will help you right now.

Please do this step with VERY CAREFULLY!!!.

A multimeter isa versatile tool for measuring voltage and current. Electricians usemultimeters to measure alternating current, or AC, and direct current, or DC,voltages and currents. Many multimeters also measure resistance, capacitanceand temperature. For example, an electrician uses the multimeter's AC voltagesetting to determine if a wall outlet has power or if a power supply isfunctioning. This knowledge helps the electrician pinpoint the cause of anelectrical problem and select the appropriate repair. Difficulty: Moderately EasyInstructions
1.

• 1

Plugthe black voltage probe into the voltmeter jack marked "COM."

• 2

Plugthe red voltage probe into the voltmeter jack marked "V."

• 3

Rotatethe range selector knob to the highest range setting, which is marked"VAC."

• 4

Turnthe voltmeter on. Slide the power switch to the "ON" position.

• 5

Touchthe probes to the device for which you measure the AC voltage. Use extremecaution. Ensure that the probes do not come into contact with anything but thesurface you are measuring.

• 6

Readthe voltmeter's display. Turn the range selector knob to a lower range ifvoltage is less than the currently selected range
Thank you in advance, sincerely. God bless you.
If you need further assistance, please contact me
E.CUADRA MANAGUA, NICARAGUA.

I would suggest to check AC outlet first where adaptor is pluged in,if Ok measure output voltage from adaptor to see if there is any (using any voltage multimeter with AC/DC)
Check label on adaptor shold be writen AC or DC output ,and value 3V,6,9,12,24,48 etc...
If adaptor is ok then problem is power jack mounted in to the speaker (cold solder joints' or damage)

The dial is for selecting which of the "multi" things you need for measuring (metering).

Set the dial to the DC area and select 20V or whatever is the lowset DC voltage setting that is higher than the battery voltage.

The meter does not put a "load" on the batteries, so the test is just an estimate of freshness of the battery.

Notes:
The meter voltage does not present any danger to the user. If you are not experienced, do not check any AC voltages.

Hello,

Is this an Auto-ranging multimeter or does it have several range settings such as 2V, 20V, 200V, 750V, etc.?

If it is an auto-ranging, you will have 2 voltage selections: AC (alternating current) which will have a sine wave similar to this: ~, or DC (direct current) which will have a symbol similar to this: =. AC is mainly used to measure the voltage in your home or voltage to appliances, either 110V/120V or 220V/240V. DC is used to measure voltages such as in electronic assemblies, computers, etc.

You need to know whether you are measuring AC or DC to get an accurate reading. You also need to make sure you have the meter on a high enough range if it is not an auto-ranging meter. The best thing to do is start on a high range and work down, although most meters have an overload protection.

To measure current you must "open the circuit" and place the meter leads in the circuit. This should only be done if you are very familiar using the meter. Current is measured in Amps (A), milliamps (mA), or microamps (uA). There is little use for the common person to measure current.

Not sure what you are going to use it for. Computer power supply, perhaps?

There are some tutorials on youtube that may be beneficial. Here's one:


Here is another: http://www.youtube.com/watch?v=rivoVzxwNtI

You can do a search once there for others. Just insert "multimeter" in the Search box.

Not sure if I have answered your request sufficiently, but if you have more questions, just use the Comment button.

If you don't have to drive, set the multimeter to 20 V DC, and measure on the battery poles. If you'd like to drive during measurement, you could measure on the cigar lighter socket.