Question about Acer AL1716 17" LCD Monitor

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About the Regulator ic

Thanks for letting me know where the regulator ic circuit is. I do know on the big black capacitor on http://home.comcast.net/~dodge1063/4.jpg that it does hold a charge i do not know the exact voltage it has however i do have an indicator that shows it does have a charge going through it. I will take the board to my circuits class to test the regulator ic to try to pin point whats not working.

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Your welcome, just info me if you done to test the regulator ic.

Posted on Mar 12, 2008

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I need the block diagram or schematic for a monitor.


N Peabody,
Unfortunately, Dell does not have the schematics for the monitors that can be sent to customers.
Thank You,
Dell-Jesse L
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Sep 24, 2014 | Dell ST2410B 24" LCD Monitor - 16:9 - 5 ms...

1 Answer

The lcd black after 2 second and when open his back side then he woriking some time and then we turn off it and again on then same proble with that soory for not good english


the problem will be in power supply.

check the 5 volt regulator or 12 volt regulator IC

After geting heatup the IC may malfunction.

Change the regulator IC

Sep 14, 2011 | LG W1934S-BN 19" Monitor

1 Answer

It keeps swtching off


Hi Anthon,

This is an indication of out-of-regulation in the power supply section. The very common caused of this fault is the dried/leaky electrolytic capacitor in that section. It will drop the supply from normal voltage and will disable the unit. Sometimes it has a bulged/dome at the top but not all, it is better that you have a capacitor checker/tester to determine its condition. Also, bad solder joints can produce the same symptom, it is hard to spot, you should use table lamp/portable lamp for finding the cold solder. Another reason of the symptoms is the open fuse/fusible resistor in series with the output of regulator IC/transistor, shorted/openRegulator IC/transistor, shorted zener diode(all are in the power supply section) and the microcontroller. Best that you check the output voltage of each regulator to determine where the fault came from and narrow the job.

If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored electricity enough to hurt you with a little mistake only.

Also check if your unit is under warranty /extended warranty, avail it because the manufacturer of your unit will fix it for free. Don't open the back panel, this will void the warranty.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.

May 13, 2011 | Samsung SyncMaster 540N 15" LCD Monitor

1 Answer

Tv doesnt turn on blinks red


Hi ldmsdad_05,

This is an indication of out-of-regulation in the power supply section. The very common caused of this fault is the dried-up/leaky electrolytic capacitor in that section. It will drop the supply from normal voltage and will disable the unit and blinking error appear. Sometimes it has a bulged/dome at the top but not all, it is better that you have a capacitor checker/tester to determine its condition. Also, bad solder joints can produce the same symptom, it is hard to spot, you should use table lamp/portable lamp for finding the cold solder. Secondary reason of fault is the open fuse/fusible resistor in series with the output of regulator IC/transistor, shorted/openRegulator IC/transistor, shorted zener diode(all are in the power supply section) and the microcontroller. Best that you check the output voltage of each regulator to determine where the fault came from and narrow the job.

If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored electricity enough to hurt you with a little mistake only.

Also check if your unit is under warranty /extended warranty, avail it because the manufacturer of your unit will fix it for free. Don't open the back panel, this will void the warranty.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.

Mar 02, 2011 | Samsung LN32A450 LCD Monitor

1 Answer

I have a proview lcd monitor model pl866s .What is the size of the power connector for the 19vdc @3068a psu?I have an extra psu with the correct voltage /current .Thanks Robert.


For the above LCD Monitor, I actually saw a small spark at the top part of the main board once the power input jack was connected. It prompted me to the exact location and when I check the SMD ceramic capacitor (that generated the spark underneath it) with analog meter set to X 10 K ohm range; it actually developed a slight short circuit. Replacing only the fuse and the SMD ceramic capacitor solved the no power problem in this 19" LCD Monitor. This Monitor uses the inverter IC (OZ960G), A1084-25CM (2.5 volts voltage regulator), AMC1117-3.3 (3.3 volts voltage regulator), ADC IC (MST8136B) and CPU IC (MYSON MTV312MV64).

Oct 07, 2010 | Proview PL 866s (Gray, Silver) 18 in. Flat...

1 Answer

Shrinking horizontal screen image appears with black border approx 1/2" on both sides


The most likely cause is a dried up main filter capacitor. Once the effective capacitance drops low enough, 120 Hz (or 100 Hz in countries with 50 Hz power) ripple will make its way into the regulated DC supply (assuming full wave rectification).

Another likely cause of similar symptoms is a defective low voltage regulator allowing excessive ripple. The regulator IC could be bad or filter capacitor following the IC could be dried up.

The best approach to testing the capacitors is to clip a good capacitor of approximately the same uF rating and at least the same voltage rating across the suspect capacitor (with the power off). A capacitor meter can also be used but the capacitor may need to be removed from the circuit.

Once the capacitors have been confirmed to be good, voltage measurements on the regulator should be able to narrow down the problem to a bad IC or other component.

Feb 21, 2010 | Dell E551 15" CRT Monitor

1 Answer

REGULATOR


The regulator ic is lm7812 series lm no matter replace it or 12v regulator

Nov 26, 2008 | Hyundai ImageQuest ImageQuest Q770 17" CRT...

1 Answer

Viewsonic VG919S 19" LCD


Hi

You must focus to mainboard of LCD monitor find the voltage regulator IC. Voltage test the regulator IC use digital or analog multimeter range 10v dc connect the negative to cold ground, these regulator providing a constant supply of 2.5 - 5v to all IC in the mainboard. check the scalar IC. Because scalar IC will convert analog input signal of Red, Green & Blue. Lastly check the controller board, check the ribbon cable connector from mainboard to
controller board for lose, check the fuse inside controller. I think the exact problem of your monitor could be either the (mainboard) or (LCD panel where the controller board is located).

Oct 06, 2007 | ViewSonic VG910S (Black, Silver) 19" LCD...

4 Answers

Screen menu displays locked & unlocked


Hold down the menu button for 5 seconds (with the monitor turned on). It should reset the lock option.

Mar 11, 2007 | SAMTRON 55V 15" CRT Monitor

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