Question about Mitsubishi VS-60707 60" Rear Projection Television

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Main power supply failur, how do i replace the part. where do i find it?

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Try website like Tvrepairworld.com to buy a refurbish power supply board for the replacement or u have all the tools and know basic electronic and soldering buy a capacitor kit,they put together and replaced those dying capacitors.Capacitors are dying are alway bulging up or puffing up on it tops.

Posted on Mar 15, 2011

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Posted on Jan 02, 2017

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Hi have Samsung tv(UN40H5203AFXZA) Version:TD01. It doesn't turn on just red light blinking, no sound/ pics.How can I know if it's main board or power supply board and what should I buy? Thank you


Hello Anas,
These failure could be a combination of the power supply and the main board failing.
I would suggest to replace both boards or if you are able to measure the voltages from the power supply and verify that the power supply is working, then you should only replace the main board.
Let me know if you require further assistance.
Search results for UN40H5203AFXZA

Jun 11, 2017 | Samsung Televison & Video

1 Answer

Sony bravia 32ex320 red led blinking 2times .what can I do


2X Blink - Main Power Error
A loss of REG12V from the power supply triggers this protect event. The usual cause is a failure of the main switching supply. In some instances, excessive loading on the secondary supply lines can cause the switching regulator to stop, or fail again, if a replacement board is installed. I would advise that you replace the main board. I hope this helps.

May 09, 2016 | Sony Televison & Video

1 Answer

Mfc 7360 unable to print 7a


Error code 7A
A synchronized signal of the main motor cannot be detected.
Turn the power off and then back on again.
1 Flat cable connection failure of main motor
Check the flat cable connection of the main
motor and reconnect them.
2 Main motor failure Replace the main motor.
3 Low voltage power supply PCB failure
Replace the low voltage power supply PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Replace the main PCB ASSY.

Jan 14, 2015 | Brother MFC 7360N - Multifunction fax /...

1 Answer

Unable to print 36


Possible Reason:
1. High voltage power supply PCB
failure
---Replace the high voltage power supply
PCB ASSY.
2. Harness connection failure of high
voltage power supply PCB
---Check the harness connection of the high
voltage power supply PCB and reconnect
it.
3. Main PCB failure
---Replace the main PCB ASSY.

Aug 08, 2014 | Brother Dcp-7055 Laser Print Copy Scan...

1 Answer

Vizio VX37L won't turn on. The light on the front does not come on even when plugged in. I replaced the power supply unit and it is working correctly (tested power output using voltmeter). I was wondering...


Good day.

The common 3 causes of power supply breakdown.
  1. The power failure of main supply (brown-out)-Because when the power failure occurs,your ac supply is gone and when its back to normal,the first current that flows in the circuit is more higher than the normal.Specially when the power failure happens only on split seconds.
  2. Too much load-It is usually happens on the big screen like 32inches,40inches and more.Because when the TV is big the load of the unit is also higher.However it takes a long period of time to malfunction the Power supply because it is specially design to that load capacity.
  3. Heat-Too much heat can cause a malfunction of the Power supply and even some parts like Main board and inverter board.
And you can find a decent replacement of your power supply and other spare parts here in good price:
http://www.electronica-usa.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=EU&Product_Code=DPS247APB&Category_Code=
However,The stock of your Power supply is sold out now but you already have a new power supply now so its OK to wait until the stocks is available.

I hope this information will be helpful.Thank you for using FixYa.

Apr 15, 2011 | Televison & Video

1 Answer

MY PRINTER hp laserget 4250 dtn is displaying 57.4 error when I turned it on, what can I do? I am ofetn requested to suitch off and then to switch on but it fails to mark " Ready"


57.4 Main fan error

Hi I hope this will help

The text come from the hp manual

good luck Ian




Q2431-90912 Chapter 7 Troubleshooting 287

57.X

PRINTER ERROR

To continue turn off then on

or

57.3

EP FAN FAILURE

or

57.4

MAIN FAN FAILURE

A printer fan is not functioning.

X Description

3 EP cartridge fan, right side

(LJ 4300 only)

4 Main cooling fan, left side

Turn the printer off and then on.

57.3 Cartridge fan error (F2)

1. Reconnect the connector

between the fan and the

DC controller PCA

(location J78).

2. Replace the fan. See "Cooling

fan (right side;

HP LaserJet 4300 series

printer only)" on page 170.

3. Replace the

DC controller PCA. See

"DC controller PCA" on

page 181.

57.4 Main fan error (F1)

1. Reconnect the connector

between the fan and the

power supply.

2. Verify that the ribbon cables

are fully seated in the

connectors on the

DC controller PCA.

3. Replace the fan. See "Main

cooling fan (left side)" on

page 168.

4. Replace the power supply.

See "Power supply" on

page 188.

5. Replace the

DC controller PCA. See

"DC controller PCA" on

page 181.

57.7

DUPLEX FAN FAILURE

The cooling fan in the optional

duplexer is not functioning.

1. Turn the printer off and then

on.
2. Replace the duplexer.

Mar 25, 2011 | HP LaserJet 4250dtn Printer

1 Answer

When i print using my docuprint 203A fuji xerox, the printout result paper was cover with black all over. what does this mean?


This is a rebadged Brother Printer.

Possible causes for a solid black output:
1 Corona failure
Is the corona wire dirty?
Clean the corona wire with the wire cleaner.

2 Corona wire broken?
Replace the drum unit

3 Are the charge electrodes between the printer body and
the drum unit dirty?
Clean both electrodes.

4 Harness connections?
Is the laser unit connected to the main PCB correctly?
Connect the harness between the laser unit and the main PCB
correctly.

5 High-voltage power supply PCB failure
Is the problem solved after replacing the high-voltage
power supply PCB?
Replace the highvoltage power supply PCB.

6 Main PCB failure
Is the problem solved after replacing the main PCB?
Replace the main PCB.

7 Laser unit failure
Is the problem solved after replacing the laser unit?
Replace the laser unit.

Good Luck!

May 12, 2010 | Fuji Xerox® DocuPrint C3055DX Laser...

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

5 Answers

Samsung LNS2641D 26-Inch LCD HDTV lost its picture


I'm afraid that while their intention was good, that most the posted solutions miss the mark. Let me guide you thru the diagnosis and possible cure. This is detailed and lengthy, since these points appear often in LCD TV/Monitor repair. You may wish to warm up your soldering iron and skip to Step (11) for the repair procedure.

(1) We know that much of the Main Power Supply is working since many of the audio, video and digital processing sections appear to be working (sound, remote control, tuner, and video out).

(2) We know that the Backlight Inverter is working. Even thought the screen appears to be dark, light from the backlight tubes can clearly be observed. Further, even thought the screen is dark, you *can* observe a small amount of the backlight thru the screen.

(3) When working on LCD TVs and Monitors, the typical problem is backlight failure. (Fortunately this is NOT the case here.) Backlight failure is most often due to Backlight Inverter failure, or Main Power Supply failure. Rarely do the bulbs fail outright (although occasionally thru abuse a CCFL tube is cracked or shattered).

(4) The typical failure mechanism on LCD TV/Monitors that have many in-service hours on them is CCFL tube aging. As the CCFL tubes get older they require increasingly higher voltages to maintain the proper regulated current thru them which in turn creates the correct light output. The higher voltage is often beyond the design limit of the Backlight Inverter leading to component failure. Typically discharge breakdown arcing on the output transformers (that drive the CCFL lamps), or drive transistor failure in the Backlight Inverter power supply. Alternatively, the Main Power Supply may fail. Typically the Main Power Supply supplies +12V, or +15V, or a higher voltage (+24V?) to the Backlight Inverter subsystem. Once again, as the lamps age, more current is drawn, and if the Backlight Inverter doesn't fail outright, it draws excessive current from the Main Power Supply leading to either Main Power Supply failure. Alternatively, the Main Power Supply protects itself by shutting down once the excessive current is detected. This can often be seen as "monitor cycling" where by a LCD Monitor will initially power up, but subsequently cycles every few seconds as the Backlight Inverter draws too much current causing the Main Power Supply to shut down. Then, after a brief recovery period, the cycle repeats.

(5) Another failure mechanism, that should not be overlooked, is Electrolytic Capacitor failure. The Internet has many sites documenting either manufacturing defects in Electrolytic Capacitors used in any of the subsystems (Backlight Inverter, Main Power Supply, Digital Signal Processor, etc.). However, more often than not, Capacitor failure is due to component stress-due to the high ripple currents present in inadequately designed switching power supply subsystems. Additionally, many inferior Electrolytic Capacitors of Chinese origin are inadequately designed-they lack trace chemicals in the Electrolyte necessary to assure long service life.

(6) If you suspect any of the mechanisms described which cause an absence of CCFL backlight, you can often use a small pocket flashlight, and observe the screen image *is* in fact present on the LCD panel, but in the absence of sufficient backlight, you mistakenly believed the LCD panel to be dead.

(7) This is not the case here. We can clearly see that the CCFL backlight *is* lit, but we also do *not* observe any image on the LCD panel, even with an external flashlight.

(8) Thru this diagnosis of exclusion we assume that either the LCD panel itself is defective, or that the LCD panel is not receiving the correct drive signals from the Digital Signal Processor subsystem.

(9) A cursory examination reveals that the Digital Signal Processor board is producing output activity, which-even if malfunctioning-would likely produce some sort of LCD display activity.

(10) The LCD panel is totally dark (backlight is on, but no image at all). This failure is so absolute, it leads one to suspect power related problems as opposed to logic or drive problems.

Nov 16, 2008 | Samsung LN-S2641D 26 in. LCD HDTV

2 Answers

Nad amp failure


Check fuses mounted near transformer . If blown check output transistor. Also check transistor transistors on small heat sink . they will cause fuse to blow.

Mar 10, 2008 | NAD C350 2-Channel Amplifier

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