Question about Phonic - XP 5000 - 5000 Watt Power Amplifier Amplifier

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Problem in dc board fuses are open many times

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You have a major component failure in the power out section

You'll need to replace quite a few transistors

Posted on Aug 17, 2010

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Posted on Jan 02, 2017

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Seiki


hi,the first thing to check with this kind of problem is the power supply section.this requires opening of the back cover.If you are handy with electronics you can check the voltage present at the power board by using a digital multimeter..

here's the procedure,
Use a philip screw driver to unscrew the cover.once the cover is remove,you can immediately see the power supply board .Powe supply board is where the power cord is connected(make sure to unplug the unit before proceeding)
check the fuses,set the tester to resistance or continuity test.test the fuse you must have a reading of 0000 this means that fuse is good OC means fuse is open.replace the fuse with the same type of amperage it is printed on the fuse...
If the fuse are ok,check for the voltage output of the power board.voltage are as follows,
5 volts DC supply for the mainboard
12volts DC for the audio board
24 volts DC for the screen
when all this voltages are present problem could be on tha mainboard itself and needs a replacement.

If one of the voltages fails then you need to repair the power board check and replace all bulging capacitors and open resistors.you can also replace the whole powerboard It is available online at shoppejimmy.com
good luck and let me know how it goes..

Jun 06, 2012 | Seiki SC221FS 22 Class LCD HDTV

1 Answer

Sony Trinitron stayby light blinks 9 times. Unit


Theirs a problem in CRT board,the inner part of your TV,at the power supply section.Try to check fuse at power supply section.there are 2 fuse in the board.The AC fuse and the DC fuse check the DC fuse.

Jul 01, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

2 Answers

E804-0001 in 6570


did you check to see if the maybe it was the dc power supply fan(fm6) that has burned out and is causing the ih power supply fan(fm7) to act up. one could cause the other to go bad..... also believe it or not the DC controller controls all fan functions so maybe one of the fuses on the dc controller could have blown out as a result of the inital fan going bad. that is where i would go with this next.. check continuity in all the fuses on the dc controller to make sure they are all intact...

if you have any problems or need any help please call me

Jun 12, 2010 | Canon imageRUNNER 5570 Copier

3 Answers

My akai tv model lct3785ta will not turn on


Ok.. What is the status of the power LED at the front. Does it blink, change color a few seconds after its turned on? Do you notice any clicking noise from the set?

Please provide this info so that we can continue with the diagnosis.
Sai.

Jan 25, 2010 | Akai LCT3785TA 37 in. LCD HDTV

1 Answer

Error code E-22 in RICOH FT3713


· Scanner home position sensor failure
· Defective scanner motor
· Defective main motor
· Defective dc power supply board
· Incorrect scanner drive wire position
· Defective dc harness
· CN103 or CN105 on the main board is not correctly connected.
· FU202 on the dc power supply board open (blown fuse).

Jan 08, 2010 | Ricoh FT3713 Copier

2 Answers

E-5 error code


E5 code refer to fuser unit.To dfisplay both digits press the Enter.
E 52 Fusing error 1 Defective thermistor,heater lamp open,defective main or ac/dc drive board.
E 53 Fusing error 2 thermistor in shortcircuit,fusing harness shorted or ac/dc power supply board defective.
E 54 fusing error 3 main board or ac/dc board defective.
E 55 Fusing error 4 rhermistor open,defective main board or fusing lamp open.
When E5 service call condition occur for safety reasons they cannot be cleared by turn OFF/ON the power switch.After repairing the copier turn ON the main switch.Enter in the SP mode and press 97.Turn the main switch OFF wait 10 sec and turn ON.

Oct 07, 2009 | Ricoh FT5832 Copier

2 Answers

I have a RICOH FT 4022 Copier and when I switch it displays U 6


Ricoh 4022, 4027 Код ошибки Описание C1 Front door open C2 Exit door C3 Cassette cover C4 LCT cover C5 Sorter open or not latched to machine, or fuse 304 on DC power board C6 ADF cover C7 Right side cover E101 Exposure lamp too long E103 Frequency problem E120, 121 Scan home problem E124 Scan drive problem E140 Lens home, or fuse 303 on DC board E141-143 Lens home sensor, fuse 303 on DC board E144, 145 Mirror sensor, fuse 303 on DC board E191 Image density sensor error E302 Charge roller problem or HVT problem E346 Bias loss E351 Image density sensor problem E352 TD sensor error E353 Vsp problem. Dirty or bad image density sensor E354 Vsg problem. Same as E353 E355 Toner density sensor problem E356 Same as 355 E405 Transfer belt or charge roller drive E440 Main drive E442 Drum charge thermistor E501 Upper lift motor E502 Lower lift motor E503 1st tray motor E504 2nd tray motor E505 3rd tray motor E506 Tray main motor drive problem E507 LCTl lift motor E522-525 Jogger sensor E541 Fuser thermistor E542 Fuser temperature too low E543 Fuser temperature too high E544 Fuser temperature too high E547 Fuser lamp won't shut off E548 Fuser temperature too high or too low E620 Communication problem between main board and ARDF E621 Communication problem between main board and sorter E623 Communication problem between main board and paper trays E720 Sorter stapler timing roller sensor E721 Sorter stapler bin lift sensor E722 Sorter stapler jogger sensor E723 Sorter stapler grip sensor E724 Sorter stapler error E900, 901 Copy counter U2 Key counter U6 Fuser unit not installed properly U7 Duplex unit

Aug 24, 2009 | Office Equipment & Supplies

1 Answer

Ricoh FT 3013 error code E 21? how can it be fix


· Scanner home position sensor failure
· Defective scanner motor
· Defective main board
· Defective dc power supply board
· Incorrect scanner drive wire position
· FU202 on the dc power supply board open (blown fuse).
- Action -
Turn the main switch off and on.
Check the position of the 1st scanner sensor actuator.
Actuated De-actuated
Does the scanner motor rotate when the main switch is turned on?
No Yes
Correct the scanner drive wire position.
Check the voltage at CN106-2 on the main board.
24 volts 0 volts
Check FU202 on the dc power supply board.
Good No Good
Replace FU202
Replace the dc power supply board.
Check the voltage at CN105-1 and 6 on the main board.
24 volts 0 volts
Replace the main board.

Jun 26, 2009 | Ricoh Aficio 2022 All-In-One Laser Printer

1 Answer

The copier powers on and displays error E55 and does not warm up


Fusing error

Thermistor open
Fusing lamp open
Poor thermistor connection

or Defective main control board or ac drive/dc power supply board

May 06, 2009 | Gestetner Copier

2 Answers

DeWalk DC500 wet/dry vaccum doesn't work


Vacuum works with the battery but does not work with 120 volt. Every time I plug it in it blows the internal fuse. I have replaced the fuse inside the vaccum several times and every time i plug it in it blows. What do you think it could be?

Feb 21, 2009 | Dewalt DC500 Canister Wet/Dry Vacuum

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