Question about Mitsubishi Televison & Video

1 Answer

Rear projection mitsubishi vs5042 no high voltage

Concentrating on power supply.pcb-dbf board. Everything seems to be okay by that I mean voltages on transitors up to dbf drive transitor. At this point have 5.08 volts on base, calls for 5.3v, have 5.7v on emitter calls for .7v, have 2.7v on collector, calls for 5.9v. Have checked resistors and caps in vicinity. They seem to be okay. Have desoldered and checked to make sure. Other two high voltage transistor values following way off. These are designated dbf drive transistor also. One has values of 11.50v on base calls for -571v has ll.o8 on emitter, calls for -570v has 840v on collector calls for .2v. Other drive transistor has 2.5v on base calls for .7, has 2.4v on emitter has 2.4v has 10.96v on collector, calls for 10.6v. The dbf output transistor has 837v on base this connector to collector of other drive trans.supposed to be .2v, collector has1060v, supposed to be 522v, 0v on emitter. All of these transistors have been removed and checked via diode test. Seem to be okay. I'm an amatuer with enough knowledge to be dangerous. Everyone tells me to pitch this tv because its obsolete but I want to fix it.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Mitsubishi Master
  • 1,779 Answers

Are you talking about the LV power supply or the HV power supply? The terminology your using is related to the horiz drive circuit. Have you checked the B+ off the regulator which should be about 120v or, it will on the pc bd for the correct voltage. Do you have sound? If you do then you will have to use use your scope to see if you have proper drive at the base of the Horizontal Output Transistor. Then we can go from there. Oh, by the way I can tell by the voltage readings you stated both of those transistors of turned off.

Posted on Feb 21, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

I have a WD 62525 tv that will not turn on, completly dead no lights or sound. replaced the main fuse on power supply board what else could it be?


you might need to have voltage checking at this time. if their is a dc output voltages at the power supply board.if none the main board will not turn on.then probably their is bad component at the power supply board.

Nov 18, 2012 | Mitsubishi WD-62525 62" Rear Projection...

1 Answer

I have a Mitsubishi vs-45605 and the power button will no longer work. Can i get this part?


This sounds like it could be a High voltage shutdown, a bean detection shutdown, a short in the sweep circuits, or a power supply issue.I have found 1. SHORT DETECT SHUTDOWN (PIN 13 OF IC700) CHECK FOR OPEN L902 PART # 351P155010 OFF Q904 C (15 V SUPPLY) ON THE MAIN PCB. 2. SHORT DETECT SHUTDOWN (PIN 13 OF IC700) CHECK FOR SHORTED D913 PART # 264P722010 AND OPEN Z901 PART # 283P039020 (Z905 AND Z900 M 3. CHECK FOR LEAKEY D5A21, PART # 264P045040, IN THE BEAM PROTECTION CIRCUIT ON THE MAIN PCB 4. CHECK PIN 6 OFF IC5A01 FOR 22.2 VOLTS DC IF LOW CHECK D5A09, PART # 264P244030 ON THE MAIN PCB. Or possibly the crts have leaked fluid and damaged the system or convergence board. It would be a total shot in the dark to say what is wrong with this set without looking at it. You are going to have to call in a tech to give you an estimate. Expect anywhere from 150 to 600 bucks. depending on what the problem is.

Aug 05, 2012 | Mitsubishi WD-65000 65" Rear Projection...

1 Answer

Tv present green button light but don't on when I push power.


paniaqua1168,

This could truely be anything. I have a tip at http://www.fixya.com/support/r4425498-basic_standard_tv_troubleshooting which could help solve your problem. If this does not I also have a tip at http://www.fixya.com/support/r4425451-when_you_turn_your_television_on_and_get which concentrates on troubleshooting the high voltage power supply.

Thanks for using FixYa and for the great rating!!

hardrocko

Aug 21, 2010 | Mitsubishi VS-50111 50" Rear Projection...

1 Answer

High voltage power supply ceased operating How much would it cost to replace?


Good Day,
This board that you want is not availible, the board must be repaired.
More than likely the convergence circuit has failed. You are only looking at a repair around $500.

Good Luck, big IRISH.

Dec 08, 2009 | Mitsubishi WS-55411 55" Rear Projection...

1 Answer

D52W20 won't turn on.


Do you get the high voltage coming up? You can check for this by measuring if there's any voltage at DL231 or/and DL221 (diodes off secondary of flyback). If there is voltage momentarily then the hv is trying to come on and the Flyback is likely at fault (excessive highvoltage detected) if not then usually power supply problem is indicated - Start there - tip-use the tuner shield as ground/return

Oct 02, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Tv screen is black but audio is fine. What does that mean?


Since you still have audio, the main power supply is functional unless your set does not have a separate high voltage power supply for the plasma tube.
Pull the AC plug and allow the set to sit for at least a few hours, overnight is best. Since these are customarily separate supplies (one for the low-medium voltages, another for the high voltage), open the lower rear of the set where the hardware is concentrated. Look for an assembly that seems to be related primarily to the plasma tube; this will be the high voltage supply.
If you do not find a separate board, the high voltage supply that has failed will be combined with the lower voltage sources.
In either case, you need to call Samsung with your model number in hand and tell them you need a replacement power supply for that set. 9 years? They may not have any but may offer to accept the supply for repair or refer you to an independent services company that specializes in repair of subassemblies.
If you have no burn-in (shadows, when the power is off) of the plasma tube's phosphor, it is still worth repairing. Frankly, I'm somewhat amazed that this failure didn't happen 5 years ago.   
Power supplies in general do not need any alignment so unplugging cables (and these are normally of different sizes and not interchangeable) and removing the board mechanically is something about anyone can do.  
If they offer to sell you a new supply, expect <$200 US; a repair could run to $75-$150 US.
If you can find a new one or a 'pull' from a working set, don't pitch the old one out, it will still be repairable.
'Pulls' can often be had here"
Jimmy's Parts   

May 26, 2009 | Samsung HP-R5052 50 in. Plasma HDTV

1 Answer

MITSUBISHI WT 46807


You have a power supply decaying; it will likely get worse. There may be board repair of this available so locate the power supply board - look at the assembly that seems closest to the AC cord, check the board number and search on it.
NOTE: There may be more than one number on the board since the bare board may have its own but it will be obviously a part of the board. The assembled board number will look much more temporary and may even be on a label.
If you locate a service company that claims the ability to service it, pick their brains a little since it may not be a main power supply failure but rather another, possibly separate board that produces the high voltage for the CRTs. If you do find a separate board that seems to be servicing the CRTs, note that board number too and ask them about both.  

Sep 30, 2008 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

VS - 5043


1. SHORT DETECT SHUT DOWN (PIN 15 OF IC700) CHECK FOR OPEN L902 PART # 351P070010 OFF Q904 C (15 V SUPPLY) ON THE MAIN PCB. 2. SHORT DETECT SHUTDOWN (PIN 15 OF IC700) CHECK FOR SHORTED D913 PART # 264P722010 AND OPEN Z901 PART # 283P039020 (Z905 AND Z900 MAY ALSO BE OPEN BECAUSE OF THIS). 3. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR A LEAKY D5A09 PART # 264P244030 OFF PIN 6 OF IC5A01. 4. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR LEAKY D5A21, PART # 264P045040, IN THE BEAM PROTECTION CIRCUIT ON THE MAIN PCB. 5. CHECK FOR LEAKY Q5A03 AND/OR Q5A04 BOTH PART # 260P559050, IN THE HIGH VOLTAGE DETECT CIRCUIT, ON THE MAIN PCB.

Aug 25, 2007 | Mitsubishi VS-5043 50" Rear Projection...

2 Answers

Mitsubishi WS-55819 power issue


This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR LEAKY C9A60 470 PF 1000 V PART # 154P400030, PARALLEL TO D9A57 ON THE POWER PCB (NOT SHOWN IN THE SCHEMATIC). 2. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR OPEN FUSES F9A04 AND F9A05 PART # 283P043090 ON THE +24 AND -24 VOLT LINES. IF THE FUSES ARE OPEN THE CONVERGENCE OUTPUT CIRCUIT WOULD BE SUSPECT. 3. SELF-DIAGNOSIS INDICATES SHORT PROTECT. CHECK FOR A SHORTED IC4B01 PART # 270P261020 (VERTICAL OUTPUT) LOADING 24-VOLT SUPPLY LINE. LOCATED ON THE MAIN PCB

Aug 12, 2007 | Mitsubishi WS-55819 55" Rear Projection...

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

127 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Televison & Video Experts

matt martin
matt martin

Level 3 Expert

1207 Answers

The Knight
The Knight

Level 3 Expert

72601 Answers

Jaime Hernandez

Level 3 Expert

2296 Answers

Are you a Mitsubishi Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...