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48 volt ctrl fail coming - Printronix Office Equipment & Supplies

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Mosfet having fault of driver section

Posted on Jan 07, 2015

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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I have a 2010 zone cart 48 volts when fully charged only run about 15 minutes anybody can help


have the battery/ies checked as they may be failing. have a battery shop use a load tester for this purpose

Dec 26, 2014 | Cars & Trucks

1 Answer

Power 48v check


Hi
Either the power supply is
not generating a proper 48
Volts or the controller board
is not detecting a 48 Volt
output from the power
supply board.

1. Make sure the power supply
board is correctly connected to
the controller board.
2. Power on the printer. If the
message appears, do the power
supply operational check (page
195). If the power supply fails the
check, replace it. If it passes the
check, go to the next step.
3. Power on the printer. If the
message appears, replace the
controller board. Record the
message and return it with the
defective board.

Aug 11, 2014 | Printronix Matrix Office Equipment &...

1 Answer

Reduce 67 volts to 48 volts dc


Just google for voltage regulator 48 V and you have lots of solutions. Be aware of the current going through a regulator. To reduce almost 20 volts each ampere will generate 20 Watts of heat, unless you use a switching regulator.

Jul 06, 2014 | Amprobe Pm55a Pocket Multimeter Ac/dc...

2 Answers

How to work EMU 0204 with CAD GXL2200


Turn on phantom power for mic? Try a different cable.

Aug 01, 2012 | CAD Microphones GXL2200 Professional...

1 Answer

+48 volt in power supply is not working. All other voltages are present


Download the schematic at:

http://elektrotanya.com/mackie_1604-vlz_mixer.pdf/download.html

Scroll down to the link to download that says "Get Manual"

This is for the 1604 unit which is just a truncated version of yours. When downloaded, find the phantom power supply on page 18.

There are too many components to guess which one so best just to troubleshoot.

I would even suspect the phantom switch since they have POOR design with no inrush current limiting when charging the input capacitor. Since the 48 is not individually fused, if the inpout cap C3 shorts, it probably will take out the switch or the diodes.

Another user had the Zener D9 fail which would cause the problem. Meter the voltage across C3 (probably about 60 volts) and D9 and C4 (47 volts). First check C4 as that cap is run TOO close to the rating of 50 volts... poor design... C5 would also be suspect... or Q1 and Q2.

Then it gets dicey as there are UNDOUBTEDLY many bypass caps in the mixer portion of the board.

Apr 02, 2011 | Mackie 2404-VLZ3 Mixer

1 Answer

My mixer wont power up. the only light that comes on is red led +48 v


This MAY be a power supply problem. We need to find if the power supply is putting out what it is supposed to. Using a meter, put one probe in pin 1 (ground) of one of the mic connectors, say channel1. Put the other probe in either pin 2 or 3 of another mic connector... Note we are using different connectors as there often isn't enough clearance for the probes in the same one... With Phantom power turned on and LED +48 lit, how much voltage do you read? If it is say 40 volts or more, then power supply is operating.

If the supply is operating then a POSSIBLE problem is a connector has fallen off where it connects to the supply or the main board.

The power supply provides several voltages such as 5 volts, 12 volts and 15 volts of various polarity.

If the 48 volt supply is found to be operating with the above test, then since the switcher and transformer are shared, it is likely the other voltages are available.

CAREFULLY open the unit and look for a loose cable.

PLEASE NOTE: This is a switching type power supply and part of the supply runs at power line potential. Only work on the supply if you are skilled and have an isolation transformer for your own safety.

Sep 21, 2010 | Behringer XENYX 2442FX Mixer

3 Answers

Battery flat, not charging. Jump started bike off car - no probs, let it run for 20 min, turned off and tried to re-start, nothing. Dash and headlights don't even come on.


The best thing to do is chk your charging system at the batt terminals w/engine running. The charge rate should be between 13,6 - 14.2 volts. THE HIGHER THE VOLTAGE, THE LOWER THE AMP S. iN TURN , LOWER VOLTS MEAN HIGHER AMPS. iF IT IS CHARGING AT 13V OR LOWER THE BATTERY IS NO GOOD. iF VOLTS ARE HIGHER THAN14.2V, tHE ALTERNATER IS BAD. Often a battery can be saved with a trickle charger, charging at a very low rate over a 48 hr. period. If the Alt charges at substained high output it can overheat and fail. Motor cycle alts. rarely fail because the engine oil removes the heat. So, Chk the battery fluids, slow charge for 24 hrs and repeat the voltage chk. _Good Luck_Ned_

Nov 01, 2009 | 1994 Honda CB 250 Nighthawk

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