Question about HP iPAQ HX4700 Pocket PC

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Replacing the speaker

How do i open the section where the speaker is located?

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This video shows how to replace the speaker on ipaq hx4700

http://www.repairhppda.com/video/How-to-Repair-for-HP-iPAQ-HX4700-HX4705-series.html

Posted on Mar 10, 2009

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Follow instructions to step 8 (with thanks to Anny for posting it)
http://www.annystudio.com/misc/ipaq4700/
With the motherboard removed, you will see the back of the speaker pictured in step 10.
I seem to recall that the 'official' replacement loudspeaker (17 UKPounds) looked identical to one taken out of an old Nokia mobile telephone I had lying around. I didn't try it - so I don't know if it would work but the DC resistance across the terminals were about the same.
The loudspeaker in the hx4700 is notoriously unreliable and can apparently be damaged by some software titles. I recall that HP published a firmware patch some years ago. I have also found that it is easy to miss the stylus receptical in the top of the device and it is possible to inadvertantly jam the stylus into the earphone socket. This can cause damage to the switch contacts in the jack socket that disconnects the loudspeaker when headphones are used giving the false impression that the loudspeaker itself has failed. I checked this with a multimeter before changing the speaker. In my case the contacts were OK but I doubt that I would have been able to repair the switch contacts without some serious soldering iron weilding.
A final note. The ribbon connector for the screen is VERY fragile. Be ultra careful when removing it.
Hope it helps.
Steve

Posted on Oct 26, 2008

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Posted on Jan 02, 2017

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If there is no audio output from your tv, either your TVs speaker or its audio output IC has damaged. You just check it with an earphone/headphone, if there is an earphone or headphone socket in front panel of your TV. If there is sound from the headphone/earphone, and not from the speaker, means the speaker has damaged. You have to replace it with same type and number. Just check your set's audio out socket, if any provided, connet it to any external audio sourse, like amplifier or so, and check whether there is sound output from it. If not, your Tv/combos' sound processing IC inside has some trouble.
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First you check the speaker of your Daewoo Tv. To check the whether the speaker is good or damaged, place your year very close to the speaker side of your TV, and switch the TV by its front panel power switch, not by the remote control. If you can hear a "Thumb" sound from the speaker, as the TV is switched on, the speaker is good and you have to to further. If not speaker has got damaged and have to be replaced.
If your TV is provided with an earphone or headphone socket at its fron panel, insert a earphone or headphone pin into it and listen whether there is sound coming from it or not. If ther comes the sound, it doesnot comes to the speaker, means that the headphone or earphone socket is faulty. Replacing it will solve the problem.
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1 Answer

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you just start from speaker first. if the speaker is out there will be no sound output from your TV. To confirm this, just plug in an earphone or headphone pin into the headphone or earphone socket , if provided, on the TV. If sound is available through headphone, it means that the sound output section of your TV has no trouble, but the speker is out. Replacing it with same type and number will resolve your problem. If there is no sound fron the earphone too, surely the sound output section inside the circuit board of your TV has the fault.
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1 Answer

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Hello
If picture is OK and there is no sound output from your tv, means either its speaker or the Sound output Ic is not working. The case of speaker fault can be easly detected without opening the TV. You just place your ear very near to the speaker side and switch on the TV by AC mains [not with remote control]. You may hear a "thumb" SOUND OR A "HUM" sound from it. If any one is there the internal speaker is working fine. The fault lies in audio output Ic stage. If there is no sound said above, speaker can be suspected. Befor confirming that the speaker is faulty, if your TV has an earphone or headphone jack in front, insert the earphone or headphone socket into it, and check whether there is any sound heard from it. If there is sound from headphone, means that the headphone socket is faulty, it does not bypass the sound to the speaker. When head phone is connected, the connection to the speaker will automatically cut of. When it is pulled out from the socket, the speaker connection will resume. If the changeover switch inside the earphone socket also show this kind of trouble. If the speaker inside is found faulty, unscrew it out of place after opening the TV, go for a same type and number, impedence and shape.
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