Author Topic: Help my DQ 12 suddenly start to produce humming  (Read 1701 times)

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Offline is_otam_Ap

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Help my DQ 12 suddenly start to produce humming
« on: Feb 16, 2006 at 12:12 AM »
experts,
need ur advice! one day while watching movie
my DQ12 suddenly starts producing loud humming noise. Bumigay na yata amplifier ko?
But when I disconnect RCA cable it stops. At first, I thought the problem is grounded RCA cable pero nung pinalitan ko yung cable ganun pa rin.? What should I do?

Offline hattori_hanzo

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #1 on: Feb 16, 2006 at 12:11 PM »
experts,
need ur advice! one day while watching movie
my DQ12 suddenly starts producing loud humming noise. Bumigay na yata amplifier ko?
But when I disconnect RCA cable it stops. At first, I thought the problem is grounded RCA cable pero nung pinalitan ko yung cable ganun pa rin.? What should I do?


bro aka may loose connection lang yan sa amp section ng DQ12 mo. besides from humming meron bang signal ng audio na lumalabas? otherwise yung grounding ng connectors medyo loose na... try to check them, kung hindi mo kaya ipagkatiwala mo sa kakilala mong technician. wag sa hindi mo kakilala baka "karnehin" yan  ;)
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Offline is_otam_Ap

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #2 on: Feb 16, 2006 at 07:46 PM »
thanks try ko check. actually malakas ang humming nya hindi ko pa nakakabit sa player ko yung rca. as in kahit rca lang ang ilagay ko nag hahumming na siya imposible namang 3 RCA ko sira... sana nga grounded lang yung madali lang gawin.. feedback ko na lang next week kung ano mangyari

Offline hattori_hanzo

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #3 on: Feb 16, 2006 at 09:26 PM »
thanks try ko check. actually malakas ang humming nya hindi ko pa nakakabit sa player ko yung rca. as in kahit rca lang ang ilagay ko nag hahumming na siya imposible namang 3 RCA ko sira... sana nga grounded lang yung madali lang gawin.. feedback ko na lang next week kung ano mangyari

kung ganun ang diagnosis at walang audio na lumalabas sa sub at humming lang malamang yung amp section na talaga yan. ilan taon naba yung DQ12 mo?
PCCian... kumbento boys!

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Offline is_otam_Ap

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #4 on: Feb 16, 2006 at 10:25 PM »
second hand ko na nabili dito sa TPC siguro about 2 years na rin sakin

Offline hattori_hanzo

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #5 on: Feb 16, 2006 at 11:30 PM »
second hand ko na nabili dito sa TPC siguro about 2 years na rin sakin

Medyo matagal na rin pala ang pinag silbi nyan. cguro to make sure pa check mo na sa technician baka lumala pa yung sira...
PCCian... kumbento boys!

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Offline qguy

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #6 on: Feb 17, 2006 at 06:08 AM »
Test with an  RCA that  you use to connect your CD/DVD player to ensure that your using a workign RCA cable.. I reckon you have done this.

Since  connecting an RCA  w/o connecting the sub to the reciever produces the hum, I think there is a short  happening when you physically connect the RCA to the subwoofer. The sub has 2 inputs, try connecting just one channel and see if the problem goes away.


thanks try ko check. actually malakas ang humming nya hindi ko pa nakakabit sa player ko yung rca. as in kahit rca lang ang ilagay ko nag hahumming na siya imposible namang 3 RCA ko sira... sana nga grounded lang yung madali lang gawin.. feedback ko na lang next week kung ano mangyari

Offline is_otam_Ap

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #7 on: Feb 17, 2006 at 07:18 PM »
I already encounter it on one channel  before kaya isa lang ang gamit ko ngayon 2 na silang sira. sana nga physically grounded yung channel. I'll try to check the problem on tuesday(day-off ko) hope na malaman kong sira. kung wala nang pag asa maghahanap na alang akong nag rerepair dito sa Pinoy dvd. salamat sa lahat ng advice nyo!!!

Offline is_otam_Ap

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #8 on: Feb 20, 2006 at 09:09 AM »
 ;D Yesss! I finally found the culprit. Dina ako makatiis pag uwi ko binaklas ko yung amplifier. Ang una kong napansin pag hinahawakan ko yung ground/chasis nawawala yung humming pag bumitiw ako lumalakas. Sa umpisa hindi mo makikita yung physical damage kung may loose wire, cold solder etc. pero nung  tinignan ko yung kinakabitan ng RCA(yung paa mismo) ngyek putol na pala. Hindi ko alam kung may available na ganun pyesa sa Raon kaya ang ginawa ko nag solder na lang ako ng wire. Hay naku yun lang pala problema kala ko gagastos na ako ng malaki. Salamat sa mga taga PDVD kasi binigyan nyo ako ng lakas ng loob para ayusin yun DQ12 ko….. salamat uli…. ;)

Offline hattori_hanzo

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #9 on: Feb 20, 2006 at 10:56 AM »
galing! Solve those loose grounding terminals... see eh di confident kana na kahit maliit na problema kaya mo na i-trouble shoot. good work... happy audio/HT expirience ulit...
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Offline is_otam_Ap

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Re: Help my DQ 12 suddenly start to produce humming
« Reply #10 on: Feb 23, 2006 at 07:09 AM »
thanks hanns