4805 gotten worse after servicing... feel like slamming it already

[sas_aaron]

Hmmm encounter some strange noise from my 4805.

 

I know how fan noise and color wheel noise sound like, and this noise is definitely not one of them. I am using in Low Power mode.

 

Description: Its sounds like it right comes off the power plug (not the 3-pin socket, i mean the other end where you slot onto your 4805) . The constant noise sounds like "flying housefly", like a constant "Zzzzzzzz.........." or "Electric Hum". This happens occasionally and is very loud and annoying when it comes; and when other times without the "Zzzzzz" sound, its works just as normal.

 

 

Anyone encounter this before? is it a problem with the power plug? there a way to solve it?  :-[

[Quest88]

i'm also curious as to what causes this problem.

i've got another brand of projector that has this same issue. but my sound tends to go off within afew mins. usually occurs when i first start the projector.

[sas_aaron]

i'm also curious as to what causes this problem.

i've got another brand of projector that has this same issue. but my sound tends to go off within afew mins. usually occurs when i first start the projector.

 

ya same problem, the sound goes off in few minutes, and come back on anytime. the noise really can make me grind my teeth. :'(

[sas_aaron]

For quest , that is normal . Even my pj also react this way . For Sas_aaron , I already notice this infocus pj problem(depend on individual luck) when I first demo 4800 long times ago . The second time is in Darkjediknight house,7200 . A sharp buzzling sound ...............  :P

 

woah.. haiz.. din expect such thing to happen sia. think i out of luck on this, super-duper suay. :(

 

anybody else also experience this?  :-\

[Phil1624705739]

No prob here. You wanna try a new powercord?

 

Phil

[sas_aaron]

No prob here. You wanna try a new powercord?

 

Phil

 

actually i plug the original 2m power cord into a 6m multi-socket adaptor. got electric buzz noise.

 

i hear that its better to plug a direct power cord to wall, so i custom a 7m power cord to plug direct into wall. still got electric buzz noise. maybe mine is not compatible? i got a power cable 250/440V  with both terminated ends 10A/250V. should be correct lehz.

 

really i am out of idea for this.

 

hmmm you know any where to get a 7m power cord(both terminated ends are 10A/250V), i went LHS but they dun have the one with same specs(theirs is 13Aor15A with 250V).

[Phil1624705739]

actually i plug the original 2m power cord into a 6m multi-socket adaptor. got electric buzz noise.

 

i hear that its better to plug a direct power cord to wall, so i custom a 7m power cord to plug direct into wall. still got electric buzz noise. maybe mine is not compatible? i got a power cable 250/440V  with both terminated ends 10A/250V. should be correct lehz.

 

really i am out of idea for this.

 

hmmm you know any where to get a 7m power cord(both terminated ends are 10A/250V), i went LHS but they dun have the one with same specs(theirs is 13Aor15A with 250V).

 

I DIYed a Belden powercord with US plug and Wattgate IEC running off my power conditioner. So far so good. I suggest u send your PJ back for servicing, maybe its a loose wire at the IEC socket.

 

Phil

[sas_aaron]

I DIYed a Belden powercord with US plug and Wattgate IEC running off my power conditioner. So far so good. I suggest u send your PJ back for servicing, maybe its a loose wire at the IEC socket.

 

Phil

 

 

i did tried to go LHS to DIY, but their PJ's power port plug-end is 13A or 15A with 250V, so i thought might not be compatible.  hmmm may i ask where u DIY it and how much?

[sas_aaron]

juz sent my 4805 for servicing, and t-loan a X1.

 

 

[Phil1624705739]

juz sent my 4805 for servicing, and t-loan a X1.

 

weirdly the "electric buzz" sound is present on this model too. help me! :(

 

Goosh... could it be a "dirty" power issue? Why not lug your X1 to your relative place to test it out?

 

Phil

[sas_aaron]

Goosh... could it be a "dirty" power issue? Why not lug your X1 to your relative place to test it out?

 

Phil

 

hmm whats dirty power?  ;D

[DIRTRUN]

hmm whats dirty power?  ;D

Hiya S,

 

One that needs a good bath...... ;D hehehe

 

But seriously it just means your ac supply is not constant in that there are peaks and dips usually can be solved with a power conditioner/filter thingy, rite, gurus?

 

Cheers,

Dirtrun

[Phil1624705739]

Hiya S,

 

One that needs a good bath...... ;D hehehe

 

But seriously it just means your ac supply is not constant in that there are peaks and dips usually can be solved with a power conditioner/filter thingy, rite, gurus?

 

Cheers,

Dirtrun

 

Hahahaa... bingo but I ain't a guru har...

 

Phil

[sas_aaron]

Hiya S,

 

One that needs a good bath...... ;D hehehe

 

But seriously it just means your ac supply is not constant in that there are peaks and dips usually can be solved with a power conditioner/filter thingy, rite, gurus?

 

Cheers,

Dirtrun

 

 

hmmm whats a power conditioner? can tell me more about it(e.g. info, prices and where selling)?  :D

[DIRTRUN]

Bro,

 

I am no expert, but it is something like : http://www.psaudio.com/articles/power_conditioners.asp

 

Hope it helps...

Dirtrun

[Quest88]

i have a power conditioner which i am not really using now.

if you have a normal power strip, and live nearby amk, i can swap with you for a week for you to try out if it helps.

[sas_aaron]

hehe wow thats cool, thanks for the kind help.. i IM u  ;D

[sas_aaron]

I just got my SP4805 back from the local servicing centre. the technician help me change the following: Color Wheel, Fan, and Power Socket Port.

 

I found that the SP4805 sounds louder than before, like its has another sound which totally overshadows the air-whooshing sound. The sound is abit like loud variable hum and crickets-at-night, which will echo the whole room(an isolated Home Theatre Room), and trust me it louder than before i send my SP4805 for servicing. i switch on my sound system, and the weird sound can be heard clearly. even a 16 year old found the sound weird and obviously louder. i suspect it is the sound made by the new color wheel.

 

the very next day, i brought back the 4805 to the servicing center, and as expected the technician is not very unhappy. i tried to explain the problem to him, and he keep explaining that it sounds normal (the surrounding is noisy, and he never really listen to the 4805 anyway), and keep bashing back at me in front of other people, as if i am an stubborn idiot. he even question me of his professionalism, not to mention that he keep giving me a slanted-eye stare.

 

Another technician is also unable to hear it, but at least he kindly mention he will take it back to infocus main office to investigate.

 

Now i am going to wait for at least a week, but i am not expecting any good news. i am not very happy with the problems the product is giving me, as well as the service.

 

Damn.. thinking of giving it up already. >:(

 

[pilyo]

hi sas_aaron, just happened to see this thread, which is quite interesting...

 

i use a 4805 as well, and sometimes there's a slight buzzing noise coming from the vicinity of the mains cord inlet.  but in my case, i think it's a dc problem (or, more appropriately, a situation?).  from what i understand, the transformer inside is not that tightly wound (or just isn't of videophile high-end grade!), so it buzzes when there's a bit of dc in the ac power line.  the level of this varies and comes/goes depending on what i or my neighbors have running at any given time (for some strange reason my washing machine always aggravates the buzzing during the spin cycle).  thing is, i doubt this is something that power conditioners will cure very well, as they tend to not do much about dc (personally i use a couple of ap quietlines, which don't solve the buzzing but tend to take some grain off the pic).  at any rate, my 4805's buzzing is generally not very intrusive (the rasp of the color wheel's louder), so i can live with it.

 

i don't know if our situations are comparable, but perhaps the service center might be persuaded to look into your 4805's transformer?

[ciputra]

mmm my guess is faulty color wheel, they do give out sounds faintly even for normal operation

[sas_aaron]

hmmm just got it repaired. ok the color wheel sound is gone, now left the same old electric problem. really dunno what to do about it, cos the techie already change the power socket port.  :-\

[domj]

I did have the buzzing sound coming from the power socket last time. It seems the plug was a bit loose thus the contact wasn't good. Changed to another plug and it's ok now. Dunno if urs is the same prob though...