Question about Midland 75-822 40-Channels Handheld CB Radio

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12v CB plugged into a 24v power supply

As in the subject heading, can you tell me what parts i need to replace where they are on the circiut board and how to identify the part so that i can buy a new one

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Hiii....

You should make a converter from 24V to 12V....I dont know for a kits..you can try to search by your location....


Hope can Help

Thank's

[Vrya]

e-mail : be_cek@yahoo.com

Posted on Mar 10, 2008

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Actually its a printer that gives out 3.3v, 5v, 12v, 24v and 47v. But the 24v and 47v is not coming, any good answer?


If you measures at the power supply module and the voltages are DC then you probably have some bad regulators. Parts are usually not coded so replace the power supply module.

Jul 02, 2016 | Televison & Video

1 Answer

Vizio logo does not light up amber when plugged in but turns white when power button is pressed. no picture or sound. Big Transformer on power board makes a light buz sound when plugged in also.


1. When the TV powered up, please measure the 24V, 12V & 5V are there, if one voltage is missing, you may have a defective power supply.

2. If the power supply lost the 24V source, you may unplug the power supply connector on both the inverter board, then power it up, if you got the 24V back, you do have a defective inverter board, you may unplug them one at a time to locate the bad one.

3. If the power supply & inverters are good, you may have a defective main board. The common problem on the main board is that a voltage regulator is bad, you may use your millimeter to measure them 1 x 1. The out put voltage (on the heat sync) should be 1.25V + the control voltage (Pin 1), for example: if the control pin voltage is 0, the output voltage should be 1.25V, if the control voltage is 2.05V, the output voltage should be 3.3V, if one of them is out of range, replace it, you may find the part from Digikey Co. The part number printed on the regulator is AMC1117.


Good luck!

Apr 08, 2015 | Vizio VX42L 42 in. LCD TV

1 Answer

Getting 120 v to white plug where it first plugs into board should i have power reading at fuse?


yes after to the fuse you must have a reading of 120vac if none the fuse get busted. if the 120v is present then it will goes through the rectifier bridge diode and primary capacitor of the power supply board to have an stand by voltage at the power supply board. when you press the power button it will send signal voltage coming from the main board to turn on the power supply board. the you will need to get an output voltage at the power supply board of 5v dc, 12v-16vdc and 24v to turn on the all the circuit, the main board sound amplifier and the inverter board for screen back light.if you can get those supply the tv unit will not turn on.

Nov 09, 2012 | Vizio L37 Television

1 Answer

Sharp lc 60e88un shutdown the 24v from power board no 12v


to check for led eror vol_ channel+ hold and press power switch once andrelease only power switch triangle light should come on then release the vol and channel knobs if set comes on the leds defective in screen

Mar 02, 2012 | Sharp LC Televison & Video

1 Answer

Need to know part for vizio gv42lf model for 200/2008 no sound and no picture. I can't remember if they told me main inverter box or main board with part number 3432?


Well you need to do some troubleshooting first. No pictures/No sound can be caused by failed 12v/24v power supply section due to bad caps, or it is not getting the PS_ON signal from the main board, or the inverter boards have shorted circuits that cause the 12v/24v power supply to be in the safety shutdown mode.
Learn more here:
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com

Dec 13, 2010 | Vizio GV42L 42 in. LCD Television

1 Answer

Error e803 checked power supply next to ac cord


Hi there,

Well most likely its a low voltage problem, check power outlet (110/220) or you need to replace the low voltage power supply board. Before replacing the power supply board you must check that the voltage is 24V by using a volt meter.

Jan 22, 2010 | Canon Office Equipment & Supplies

1 Answer

Fuse and power supply look ok to the eye slight static sound on audio tiny flash intermitent inright corner on video, any clues? power diods check good ,nothing looks hot or burnt There is a second board...


Your power supply on the dc output should have the floowing DC voltages, 5v, 12v, and 24v. Just start probing the connectors of the power supply. 24v is needed for the backlights inverter board, 12v for sounds, 5v for logic board.

Dec 09, 2009 | Audiovox FPE3206 32 in. LCD Television

1 Answer

Soyo 19" flat screen monitor


Hi, these monitors are dropping like flys and it's due to power supply problems. There is a power supply that needs to supply 5v, 12v, 24v. The 5v and 12v is for the logic boards and the 24v is for the back light. On other boards people have tried to repair the supplies with no luck (same here).
The best fix is to purchase two power bricks off of ebay. Get one that supply 5v 12v that are used for external hard drive enclosures and get one 24v that is used for mac g4 laptops. Both can be had for < $10. Then you will have to replace the internal power supply with these. This is not for the beginner, but if you have any experience with soldering and wiring you should be able to do it. You will have to tap into the 12,5 volt wires, I used the PC style power 4 pin connections and attached the other end to the power supply. You will also have to do this for the 24 v lines. A bit of cutting / stripping, soldering and getting the AC to both will do the job.
The only thing that this will not do is shut of the 24 v supply during idle. Best this is to remove power from the monitor when not in use. This should fix an no / power / on then off / problems with this monitor.
Total time is probably about 2 hours and tools needed are the replacement power bricks, cutters, soldering iron, solder, electrical tape, screw driver... etc
ort11

Oct 25, 2008 | Soyo DYLM1798 Monitor

5 Answers

HP 5470c - No power


I've done it, using an adjustable power supply all i needed was 12VDC - 2Amp, the power connector going to the scanner is a 4 pin mini-DIN male, so i've ripped of the cable from the original bad power module, cable has inside 2 wires one black one white and a shielding. Black and schielding are connected together and are going to the minus, the white one is going to +12V

guess what? .... my scanner is working again

Nov 25, 2007 | HP Scanjet 5470c Flatbed Scanner

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