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I have my problem with my Mastech power supply hy3030ex. Their is a display in the screen but cannot adjust if i turn the potentiometer, still at zero display. what's the matter for this?

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What indicator light is on? is it OV? if so, then the power supply is under over-voltage protection and you can reset it by turning the OV knob (second from the left) to maximum position, and then power cycle it. Make sure there is no load connected.

Posted on Nov 12, 2013


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Error code E6 (XQB70-DB14)

An E6 or E7 error code is an incline error code. The E7 code means the potentiometer value the console is reading from the lift motor is out of range. This can happen when there is a bad wire harness connection or a damaged wire harness. It could also just mean the incline motor needs to be adjusted back into range. If all wire connections look ok, the incline motor will need to be adjusted.
  1. Turn the power OFF, wait 5-seconds and turn back ON.
  2. Get into test mode and enter through the I/O testing step. This screen will display the potentiometer value of the incline motor. Different models will have different values. Check to see if the running deck is raised to high incline level or if it is at the low level. If the running deck is at a low position press the incline up button. This will cause the incline motor to raise the running deck up. When the deck gets to a mid-level position, press the incline up button a second time to stop the deck. If the running deck is in a high incline position, use the incline down button to adjust the deck to a mid-level position.
  3. Once the unit is in the mid-level position, power the treadmill off for 5-seconds and then power it back ON.
  4. Start the treadmill.
  5. Once the treadmill starts the running deck will move to the level 0 position. If this does not resolve the issue or it will not adjust please contact customer service.

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Aug 07, 2016 | Heating & Cooling

1 Answer

After cleaning the lenses on my 60P8342a tv and turning the color buttons in the back my tv is shutting off and on and I have a flashing power button, no pic or sound at times

How long was it back befor you turned on this potentiometers ?

Dust and more can be come into the potentiometers of a crt (cathode ray tube) projetion tv in the years that its old it is not strange.
Ist an older kind of model of projection tv.

Treat them with contact spray , also not only red the r g b potentiometers but all the potentiometers that are parts of the convergention panel. and adjust them on a screen with the base saturation of color to zero so you adjust a good gray tray with a balans without a red brown or green or blue surplus so that you have white gray black in balance if you have adjusted , tur back on the basic color saturation to your prefered level.

Chances are pretty good that the weather will be fine.
To see some brown spots on the board and replace any carbon composite resistors for carbon or metal film resistors in the print because of high tolerance over this kind of resistance.

Feb 21, 2016 | Televison & Video

1 Answer

How do I calibrate elevation grade for treadmill?

Hey there, sorry to hear you're having an issue with your elevation motor. I would be happy to help you solve the problem.
Since you already installed your motor you can go straight into diagnostic mode.

To get into Diagnostic Mode on your L8
Make sure to turn off your treadmill.

-ET's - Press Menu and Start at the same time
-CT's - Press Manual (or Display^) and Start at the same time
-All other L SERIES mills - Press Display (or display and Start at the same time

-*CT's that were manufactured after 09/2003 - Press Display and start at the same time.

Few things you want to do, if you haven't already.

A. Align the motor with the clevis mount and install the motor mounting pin.

B. Insert hitch pin.

C. Reconnect the elevation harness to the lower board

D. Set the lowest limit switch by holding the UP elevation button for 5 seconds. Then press and hold the DN elevation button one more time to make sure you only hear a click.

E. For L7/L8 machines; Thread the elevation nut to where its flush with the threads on the "worm' shaft.

F. Mount the elevation nut to the leg assembly by lining up the holes on the leg assembly. You may have to move the leg assembly so that the holes on the elevation nut line up. Then slide the two elevation pins through the elevation assembly and into the elevation nut. then secure the pins with the 2 set screws.

To calibrate your potentiometer you can try to adjust while it is installed but for best results you must calibrate it before its in your motor housing.

G. Calibrate the elevation potentiometer and to do so you must;
1st: Visually confirm treadmill is leveled. (0% grade)
2nd: Adjust the settings as follows;
All L SERIES millls should read 0.0
3rd: If the setting is incorrect, follow these steps.
Step 1: Turn the post of the potentiometer all the way
Step 2: SLOWLY turn the potentiometer COUNTER
CLOCKWISE until the setting is correct.

H. Carefully install potentiometer into the motor housing
*NOTE: The setting may vary when inserting the potentiometer
into the motor. As long as the change is minimal, fine
adjustment can be achieved by rotating the meter
while inside the elevation motor.

I. Press OFF to turn treadmill off. Then restart the machine in manual mode to TEST elevation after resetting your potentiometer. As long as the change is minimal, fine adjustment can be achieved by rotating the potentiometer while inside the elevation motor.

For more Diagnostic features and possibly further detail, I will be attaching a Link to your machines service manual. I hope this helps, always hear to help. SportSmith.

Apr 20, 2015 | Landice L8 LTD Cardio Trainer Treadmill

2 Answers

Displaying incorrect voltage nearly an addition of 30 volts in actual AC supply

I would try to remove the battery.
Wait awhile and reinstall.
This might reset the meter.
Install new battery also may help.

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Error message no disk only with dvd

Condensation problems on circuit, or power supply failure.

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Image quality problem

Check the power supply part no. matching. If there is adjustment potentiometer for the supply voltages try adjusting to the required level of the voltage.

Apr 30, 2010 | Panasonic Viera TH-50PZ85U Plasma TV

1 Answer

Wd-52525 vertical lines on screen

Your reference to across the screen to me means horizontal. Check the bias on the video drive, there may be a potentiometer on the board to adjust. The new parts may have picked up the drive, turn it down if possible.

Mar 15, 2010 | Televison & Video

1 Answer

No ac output, am looking for test procedures on the electric/electronic side of the unit, in particular of the AVR unit

Hello. It is possible to do a field test on your AVR unit. Here is what you do: you will need a three phase power supply, dummy loads of similar resistance to your exciter coil and a potentiometer of the anticipated value. As you adjust the potentiometer on either side of the incoming supply you will find the field current drop or rise. This is not a truly scientific method but it is the method that many generator manufacturers use for their field tests.

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1 Answer

Samsung spn4235 plasma tv

The set will need some screen voltages adjusted on the power supply board, the VS voltage is marked on the panel inside the set, find the VS test point and the VS adjustment potentiometer. adjust the voltage down at least 10 volts, if your not an experienced person in electronics, get a person that is, there is a high voltage on that board that is dangerous

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