Question about Canon PIXMA iP3000 InkJet Photo Printer

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How to check the PSU for IP3000 printer

Can any one tell me how to measure the voltage output of power supply unit K30233 for IP3000 printer , which has 3 pins, it suport suppose to have 12v and 24v output voltage.

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  • Anonymous Feb 18, 2008

    worked one day then no light to power on switch, no go, checked all power outlets

  • e20140 Jan 11, 2009

    Same problem. Printer will not power up. Tried removing print head method and no good. Tired entering reset code and no good.
    Pull out the PSU from the bottom and check. I'm getting 8 volts Red to Black (should I get 24?) and 24 volts Red to Yellow. Nothing between Yellow and Red.
    Is the PSU good or not?

  • Anonymous Feb 09, 2009

    Same problem as e20140, tried the same things, same results, same voltage readings.
    One clue: printer had worked flawlessly until a deep cleaning. Powered down normally. Next day: dead.

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I've just checked mine as it suddenly stopped working - does not even light up the green button.

I'm getting 8 volts Red to Black and 23 volts Red to Yellow so I guess it's fubared?

Posted on Jan 28, 2008

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How to test your AC/DC Adapter or Computer Power Supply Unit.


A PSU or Power Supply Unit aka AC/DC adpater is then means by which a low tension (voltage) appliance receives its power from the 240 AV mains supply, the this is usually accompanied by the nominal current that is drawn from the PSU on load in milliamps. (e.g. 500mAmps = 0.5 Amps) most modern DC adapters are unregulated, where the output voltage is only regulated by the load current, and a smoothing Capacitor is sometimes used to reduce AC ripple on the DC Level.
If the PSU is regulated the DC Voltage that you measure using an AVO even off load will be the same as the rated current.

Also most, not all, are double insulated (indicated by small square inside a larger one) this means that it doesn't need a earth on the plug, the give away is a plastic pin instead of a metal one found in most domestic plugs with a 13A fuse.

Using Ohms Law P= I x V means that we can find out either the Current in Amps Power in Watts or the Voltage of any unit this is also called the VA rating

The Simple test is if the adapter gets really hot as soon as the you apply AC power then this may indicate catastrophic failure OR a dead short and you must turn OFF immediately the plastic may even start to melt, you may also smell electrical burning. This will also happen if you ever use a non-specific adapter on your device that has a different output voltage this will almost certianly cause damage to your device.

The main test if to test the step-down transformer using an AVO (Amps Volts Ohms) this is what is used to reduce the 240V ~AC voltage to something more in line with the required DC supply say 14-16V ~AC, a diode bridge converts this to DC, if it is regualted there will be either and either a zener or resistor drops this to the rated 12V and a capacitor to smooth the level.
You need to make sure this is socket is working correctly by checking with either a lamp electricians screw driver or a AC test plug, dont use this socket you have an earth fault or someother problem, usually two lines at the outside of a AC socket tester means all is correct.
  1. First measure the resistance (Ohms) across the two AC pins that is the Live and Neutral this should have VERY low resistance in the range 300 to 2,000 (2K) Ohms. if this is the case then your primary winding is probably OK if you see 1 on all settings this means open circuit (O/C)
  2. Then connect the power supply to a 240V AC socket, and check the output voltage with multimeter set at volts DC you should see a stable voltage of the rated value for a regulated adapter or slightly higher by about 5% if its unregulated as this is a reading off load, if you were able to test the voltage with the adapter on load you would see the rated DC voltage.
  3. If you connect an unregulated AC/DC adapter to the device and open up the cover to test it under load and the voltage is low around 5V or less then the adapter will need replacing even if the off load value appears correct in above test ( ** ref the table below)
NOTE: If you have a AC only output then the test done in 1 can also be done, if there is a diode bridge, Zener Dicde OR Capacitor on the secondary this test wont work so you might have to remove the cover by unscrewing the tamper-proof screws and test it before the connection to the PCB, without the power on of course, check out my tip HERE for help on how to remove the screws.

If you have a faulty power supply its usually the thermal fuse that blows on the secondary winding, this means that you will get considerably less Voltage at the output jack of around 5 VDC or less and falling if this is the case the transformer is faulty and will need to be replaced with one of the same step-down ratio. OR you will need a new AC/DC Adapter, check out this table for examples of the results that you might find.

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** The Amstrad Black PSU that reports 24V and 383 Ohms on the primary may still not deliver the rated voltage under load and therefore I have marked this as a false positive and therefore FAULTY.

NOTE: The AC/DC Chargers are constant current devices (the symbol is usually two interlocking circles and even though you can do similar tests on the transformer primary coil its the current that it delivers under load that is important the only way to test this is using a clamp meter on the cable to see the current under load this should match the rated current.

COMPUTER ATX PSU

Most ATX power supplies are known as switched mode can only be tested under load when connected to the PC motherboard this is a bit tricky using a plain old Fluke, AVO or Multimeter the best way is to buy dedicated PSU tester for the type of Power Unit you have, it will check the DC voltages in the range + 12V,-12V,+5V,+5VBs and +3.3V on both the SATA and IDE supply cables these cost about £20 ($35) you can test the unit in as little as 5 mins.

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How do I remedy error SC 552?


change the main motor or clear the eroor

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It will not trurn on does the ac adapter need replacement it is over 10 yrs old


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.

Apr 09, 2014 | Canon PIXMA iP3000 InkJet Photo Printer

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Power supply


Measuring the voltages of a PC power supply is not a job for your basic DIY'er, and needs specialist equipment.
I would try swapping out the PSU with another known good unit

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Why is the green led blinking on my M3N72-D motherboard


The flickering green LED on the motherboard is illuminated by the standby power supply, a small completely independent, always on, 5 volt power supply labeled 5VSB usually, output is on the violet wire.

Here's some more detailed instructions about how to check a PSU.

Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

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Why is it displaying sc300 error?


High voltage power output error The measured voltage is not correct when the EGB measures each charge output (charge, development, image transfer belt unit, and transfer unit).
  • Disconnected or defective high voltage harness
  • Defective high voltage power supply
  • Defective EGB
  1. Check or replace the harnesses.
  2. Replace the high voltage power supply board
  3. Replace the EGB.

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The green light is blinking on the supply unit but it not coming on or booting up , i need to know if the supply unit is bad


Close examination of your power supply may reveal if the psu is bad.

When the power supply is plug in ac socket the green indicator led inside the motherboard will lit steady green. See if by turning on the cpu you will see some sparks in the power supply connector attached to the motherboard. This is a clear indication of a bad or shorted psu.

You can also smell if there is a burning inside the psu.

See if the fan inside the psu is working if not then its a clear indication of a bad psu.

Using a multimeter if you have one measure the dc voltage coming from the supply connector. Insert the black probe to one of the black wires in the connector. And the red probe to the red wire in the connector. the reading should be +12VDC. Put the red probe to the red wire and it should read +5VDC. Any readings below this, means bad psu.

Measure also the output voltage when there is a load in the power supply. Connect a CD-ROM drive or hardisk and measure again the voltage. Dropping of voltage when put some loads is a clear indication of a bad power supply unit (psu).

I hope this will help you.
Thank you for using Fixya!

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The power supply light is on Acer 2300


Ok all PSU, these days are whats called Switchmode technology, now these PSU, are designed to shut down if they "See" an overload, or short circuit... When the PC is connected to the PSU, it draws current, IF that current is over a certain limit it will also shut down... Sometimes that will happen also when the PSU is faulty.. that voltage measured when NOT connected, is called the "Open Circuit" voltage and can be misleading, as really it must be measured under load, as it is called. So, if when, you connect the PSU's LED goes OUT, then either the PC, is faulty, OR the PSU is faulty, the only real way to tell is by substitution. Also check where the lead enters the Plug, this will sometimes cause problems. A PC should work ONLY on a PSU, so remove battery and check, if still no go, then, suspect the PSU, if it does, may be the battery. OR the internal power conditioning circuitry.

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No Power Up State


CHECK YOURE POWER HOOK UP ON THE BOARD MAKE SURE THEY ARE HOOKED UP ON THE RIGHT ONE IF THEY OR OFF ONE PEG IT WILL NOT POWER UP

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