Question about Philips Magnavox 51MP392H Rear Projection Television

1 Answer

No hv.. no. hv and no voltage supply on the lamb drive and there is one parts sparking looks like thermistor on the circuit board part of the lamb drive. what is the required voltage of the lamb drive...?

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

What's a 'lamb drive'? Do you have a schematic for this model? If so, let me know where you got it as I'm looking for one. What's the number near the part that is arching on the PCB? 

Posted on Sep 30, 2008

  • hanzee_2000 Oct 04, 2008

    'Heliman' posted a link to the service manual:
    http://www.mediafire.com/?ad1mtycjei3

×

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

Can a microwave be repaired?


Yes it is repairable, but if you do not have any experience in the repair of microwave ovens do not engage in their repairs because it is one of the most dangerous household appliances and the consequences can be disastrous. If light and turntable works than low voltage circuit (220V or 110V) works well. In this case the problem is in a high voltage (HV) circuit which is made up of the magnetron, HV diode (rectifier), HV capacitor and HV fuse or protect diode. Failure is in any of these components in "HV circuit" or in the main board. If light and turntable does not work than fault could be in power supply elements like: power supply cord, transformer, power board, fuse (glass or ceramic, ussualy 8A, 10A or 12A) on power board.

Dado

Oct 24, 2015 | Kenmore Microwave Ovens

Tip

When you turn your television on and get nothing but a clicking sound you could...


When you turn your television on and get nothing but a clicking sound you could have almost anything wrong with it. The two most likely places to look are the high voltage section and the low voltage power supply. In order I will explain what to check to try to resolve the problem.

First, is the standby light blinking in some sort of pattern? If so, count the number of times it blinks between long pauses. If it is blinking in a patten, this is an error code, and can be helpful in diagnosing the problem. Depending on the manufacturer the blinking pattern will mean different things. Error code lists are available by googling "(manufacturer) tv error codes". Proceed from here based on the information provided by the error code list.

If your set has no blinking lights proceed by unpluging and looking at the mainboard for burned resistors or bulging electrolytic capacitors. Electrolytics look like little cans, with shiny ends and are generally black, grey or blue. They have a positive and negative lead so be careful when replacing to get the polarity correct. If they are bulging replace them. Also replace any bad resistors found. At this point it would be a good idea to inspect all solder joints on all boards, but especially the Low Voltage and High Voltage sections, and resolder anything which looks suspicious.

Finding no charred resistors or bulging caps, and after resoldering all connections, your unit still does not work, check the horizontal output transistor for failure. Using a DMM on diode check, check the transistor out of circuit for shorts/opens between any two leads. A good unit should have somewhere between 500 and 1000 ohms one way and infinity when the leads are reversed. Only two lead configurations will show conductivity. One set of leads should show infinite resistance both ways. If the transistor checks bad, replace it and the flyback. Check all resistors and diodes in the HV circuit and replace any suspicious units.

If the horizontal output transistor checks OK, check all semis in the LV power supply. Replace any bad units found and check all associated resistors and replace as necessary.

If both the HV and LV sections check OK, remove the circuit board from the CRT and try the unit. If it runs your CRT is bad and needs replaced. If it does not run your problem is elsewhere.

Working one section at a time, remove and isolate any remaining sections while attempting to turn unit on. If unit works with a particular section disconnected, your problem is in that section and you will need to do normal troubleshooting procedure, listed above, on the section in question.

If after all the above procedures are tried, and your unit still isn't working, you may have to replace an entire board. These days most boards are relatively inexpensive. The most likely board would be the LV power supply which usually contains the HV power supply also.

Any parts or boards needed can be ordered at http://www.encompass.com or http://www.shopjimmy.com .

Good luck with your troubleshooting and be careful while inside the set especially near the High Voltage second anode where it connects to the CRT.

Thanks for using FixYa.

hardrocko

on Mar 27, 2010 | Rock & Ice Climbing

1 Answer

Whirlpool microwave keeps opening high voltage diode


If you do not have any experience in the repair of microwave ovens do not engage in their repairs because it is one of the most dangerous household appliances and the consequences can be disastrous. According to your description, low voltage circuit (220V or 110V) works well (light, turntable...). Obviously the problem is in a high voltage (HV) circuit which is made up of the magnetron, HV diode (rectifier), HV capacitor and HV fuse or protect diode. Failure is in any of these components in "HV circuit" or sometimes in interlock switch assembly or PC Board.

First, you must be sure which diode is blowed, reactifier or protect diode.

To check magnetron following this procedure:

Discconect the mains supply.
Check that the capacitor is discharged (by resistor 100 ohm / 10W or more).
Discconect the magnetron.
Measure the resistence between the disconnected terminals (should be app. 0.5 ohm).
Measure the resistance between the supply terminals (both) and earth. The resistance should be infinite.

25559187-4ddtveq3kht3vtndvgqx3rge-4-0.png

Dado

Mar 12, 2015 | Whirlpool MT4155SPS

1 Answer

Powers up , has audio but no picture


Plasma sets have two separate power supplies; the main supply produces voltage for everything and may even produce a specific voltage for the high voltage required by the plasma display.
In your case, it is likely that the latter (HV) supply has failed.
This may be a separate board and if so, may be user replaceable since these are normally outsourced and just plugged into the set during assembly.
Removing the back of the housing, you are likely to see at least three boards. One of them (the main board) will have many components and most will be smaller in size. The main power supply will have much larger parts on it and the high voltage supply will likely be connected to it and have far fewer parts than the other boards.
It is possible but unlikely, that the main power supply is not providing voltage to the HV board for the display.
If replacement of the HV board doesn't restore the display, then it will be necessary to replace the main power supply too.

Aug 21, 2011 | Vizio P50HDTV20A 50 in. Plasma HDTV

2 Answers

I have a power supply of an LCD monitor. The model is PI-170DTLA and I want turn on the backlight lights without using the motherboard. How do this? What is the pin? What voltage i need? How control the...


You'll have to power the HV converter board of backlight from an independent power supply with the same voltage and corrent capacity than the motherboard provides, you can use a multitester to get these values or maybe thre's a sticker on motherboard providing this data, use the connector from motherboard to HV converter board to get the pinout, the brightness control can be get varying the provided HV to backlight. If you can get service manual or the circuit schematic of monitor will be helpful for your purposes.

Mar 05, 2011 | Proview Televison & Video

1 Answer

Dometic RM3801. Propane ignition failure.


The older units has a 3 VDC glow coil the newer units have a 12VDC igniter.

Fromwhat your described above the next paragragh is your ignition system.

The igniter control voltages in the newer SPARK type igniters are (+) = 12VDC, (L)= high voltage lead (Spark plug voltage! I.e ruin your meter type voltage), (-)= Ground L is the lead that passes the HV spark from the control unit to the ignitor plate. The L lead should pass one heck of a hit if is workng correctly.
If not look at the HV lead to see if it is grounding out somewhere.

If the gas safety valve is not sensing gas pressure... you will not have 12VDC to the + terminal of the ignition moudule.

With the gas on and you have 12VDC at the ignition module + terminal then most likely the ignition module is bad.


Kelly


Apr 17, 2010 | Refrigerators

1 Answer

Turned on tv no picture only sound then i heard a pop and smelled burning tv turned itself off. 5 min tried turning on tv again nothing happened tv does not turn on at this time


Your RCA TV needs serious troubleshooting. Burning smell is from HV transformer or resistors smoking.

Most likely power supply and/or high voltage circuit or convergence circuit. Many times RCA have multiple or secondary faults that occur with HV or convergence failure.

Repair of RCA HV or convergence usually requires exact manufacturer parts and upgrades or repair in power supply. I would not advise trying this repair without manufacturer support for correct part numbers and service bulletins.

easyab

Feb 28, 2010 | RCA Televison & Video

1 Answer

Microwave will not heat up. All else is working normally.


either you have an electronic part called a "triac or SCR that fires the magnetron circuit that is bad on the circuit board, or the H.V. Diode is leaking in the same circuit,but this is near the H.V. capacitor and magnetron components and can't help in supplying high-voltage( -D.C.) to operate the magnetron circuit,it might be the H.V. capacitor, but normally they don't open, but if if they short circuit,the internal fuse will open up

Feb 23, 2010 | General Electric Microwave Oven

3 Answers

COMPLETELY DEAD


Hey !!! I solved my own problem. After I soldered up the thermistor I still had the same problem so I checked all the known parts around the startup circuit including the power supply relay and relay driver. All found to be good so I then attached a scope and signal generator and applied a horiz signal to the base of the Horiz output...voila!! I got high voltage so I tracked the horiz siganl thru the circuit and found a coil to be bad along with 2 electroletic Capacitors. The Zenith part number for the coil is 20-4073-01 and its part # on the board is LX3262. The caps are 4.7 Mfd @ 50 VDC located at CX3261 and 10 Mfd @ 350 VDC located at CX3205. I hope this will help someone else.

Ed

Feb 13, 2008 | Zenith B36A24Z 36" TV

Not finding what you are looking for?
Philips Magnavox 51MP392H Rear Projection Television Logo

Related Topics:

145 people viewed this question

Ask a Question

Usually answered in minutes!

Top Philips Televison & Video Experts

The Knight
The Knight

Level 3 Expert

71736 Answers

matt martin
matt martin

Level 3 Expert

1207 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

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

Answer questions

Manuals & User Guides

Loading...