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Internal cooling fan

Changed the lamp-and now manual states that internal cooling fan has
problem and call for service ---can you help?

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Go back and recheck all of the access doors. If any are not closed completely, the unit won't power up. Also check to be sure that the fan spins freely and that there is no excessive dirt in the area. There are air flow sensors also that will shut the set down.

Keep us posted.
Dan

Posted on Feb 07, 2009

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Why does power stanby light blink red four times on sony wega lcd model kds-r60xbr1


That error code represents a fan has stopped turning. There are 4 fans. A lamp cooling fan, a lamp ballast fan, a digital board fan, and a light engine fan(internal to light engine--not visible.)

Oct 07, 2014 | Televison & Video

1 Answer

Diagram for cooling fans that controls the lamp on a Hitachi TV


I have not seen this model Hitachi but I have never seen one with 2 fans for the lamp---in all cases there is usually only one-

Hitachi only offers service manuals online and only to authorized repair shops with a user name and password. If two fans ARE involved it is unlikely both would be bad---flying by the seat of our pants I would suggest if possible to check the voltage at the fans---or even spin them to see if they will suddenly work---dirt can cause a fan to slow or stop and the set would either shut down or issue some kind of "fan failure" or temperature warning.


I am willing to help as much as possible and I understand the desire for a diagram but that is unlikely.

Let me know if I can assist or such in any way---I do this here for free but am here to help people.

SD TECH

Dec 04, 2012 | Hitachi 50VS810 50" Rear Projection HDTV

1 Answer

Reset lamptimer on kds-r50xbr1


The problem is not with the lamp. This TV (I have one) has 3 blowers internally that keep everything cool. What happens over time, regardless of how clean you keep your house, they get clogged and stop. What you are seeing is that the system cannot see one or more of the fans spinning. Yes, they detect whether the fans is spinning.

You'll need the Service Manual or Repair Manual to take the TV apart. This is non-trivial. It took me 2 days to take it apart and a day to put it back together. I used another day to clean and the blowers and air ducts within the TV. I had one stopped blower, the other two were pretty dirty. I was able to fix it without buying anything. The stopped blower has to be disassembled, cleaned, lubricated and seems to be holding (knock on wood).

I seem to recall I had to pay for the service manual. Here's one link you can try. You can also do some other searches to see if you can find one for free http://www.nodevice.com/manual/sonymans/manual3410pdf/get4927.html

Jun 18, 2012 | Sony Televison & Video

1 Answer

Turntable is not turning and we do not have a manual Model is JVM1660BB005 GE Profile


The turntable on many of these models get their power from the internal cooling fan.

When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.

I'm instead talking about the internal fan which comes on automatically whenever you microwave.

It is vital that the cooling fan runs, or the turntable and stirrer won't work, and magnetron will soon be destroyed.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

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At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

HTML clipboard This service manual may also help you with disassembly and part replacement.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer

Sep 07, 2010 | GE JVM1660 Microwave Oven

1 Answer

Installed the lamp that was burned out and nothing happens


Look on your power supply board for Bad capacitors they will be swollen,vented or puffed up on Top if you see any that look like that they are bad ,You can also use your google bar and go to this website they will list parts and prices Encompass Parts Distribution
sometimes they will have Free service Manual you can print out online Type in your Model number WD52525 and on top left side page look to see if they list the free service manua

Wondering is all of your Fans Running defective Fan can cause set not to come on and the ballast board is what turns Lamp on, it connects to Lamp. Make sure Lamp Fan is running it is what keeps Lamp cool when set is on.Let me know if you need any more help.

Jul 02, 2010 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

KCMS145JBL-1 stopped heating. It overheated, shut down, then eventually lights and sensors came back on. Still doesn't heat.


It's likely the magnetron overheated, and when its thermostat tripped, all power was interrupted for safety until it cooled back down.

You likely have a failed magnetron, which is sometimes due to a failed internal cooling fan or clogged filter.

Your owner's manual will help you on locating and checking the filters. Grease filters can be cleaned, but charcoal filters cannot, they must be replaced.

When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.

I'm instead talking about the internal fan which comes on automatically whenever you microwave.

It is vital that the cooling fan runs, or the turntable and stirrer won't work, and magnetron will soon be destroyed.

Sometimes the cooling fan will not run after the cooktop lamps have failed. A surge from the filaments shorting can cause damage to the control circuit board, resulting in odd operation from lights, fan, or turntable.

We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

We have a sound clip here of what a microwave should sound like when the cooling fan and high voltage section are working.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)


http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)


You can find links to helpful exploded view diagrams and part ordering help here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Nov 28, 2009 | KitchenAid KCMS145J Microwave Oven

1 Answer

BenQ 500W projector shuts off after 10 minutes


it has lamp which has 2000hour in normal and 3000 in econom mode to shinenormal then it must be changed and your may already in this state and began such things.

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One of the common problems on this and the 56 model is the exhaust cooling fan, the reason being that due to the heat given off from the lamp assembly the bearings dry up, even if they dont fail but go stiff, this also causes problems because inside the fan it is fitted like most of them now with a rotataion speed sensor and the system control monitors the pulse reference.If this changes and is not upto speed to keep the lamp cool enough the internal heat sensor detects this and the unit locks up into protection mode to protect the lamp assembly from getting too hot or even exploding.Kind regards John Williams www.jvsvisual.com

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Won't turn on.. Operation indicator is red, Lamp indicator is flashing red??


According to the E44W48LCD service manual, the temperature indicator red light states the projection TV shut down due to overheating. Red (flashing) states the projection TV shut down, check the cooling fan.

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2 Answers

Lamp cooling fan


I'm not sure how difficult it is to change the cooling fan, but I saw the part on PartStore.com for only $13.

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