[jayakumar.a.k.]

i am a machanic was got creative 6.1 dead state i inspect that ic s volts are ok but no sound out from whoofer and speakers i replace three ics c1975,tda8510, tda8511,and 4556 but not sound out please help me

[shaunplatinum]

haha!

Could you perhaps enlighten me as to what the defective part may be?

When i look at the board the only parts that have burnt out are those two resistors. no black anywhere else or signs of defective parts. obviously there is a fault somewhere else down the line causing the resistors to blow. im not electronically minded but maybe a transformer has blown and is not stepping the voltage down or someother part which would cause these resistors to blow should that part malfunction. I dont know! just need some guidence as to what to test. thanks

[jts1957]

The defective part(s)?

[shaunplatinum]

i have a creative inspire 6700. Two of the resistors had fried, R10 and R11. I replaced them(same resistors 5.6ohms) and powered the system back up. Fried the same two resistors in seconds. Is there something else i should look at replacing so it doesnt happen again?

[lostair]

This morning my speakers gave up working. Now the light doesn't appear and a loud humming sound comes from the subwoofer.

I was thinking of buying another, but I thought about repairing it myself.

I looked inside, but no burnt out parts. What would be the most common problem? Capacitor, Resister or IC?

Suggestions would be appreciated.

[CDBob2000]

I had to log in and say thanks for putting me on the x marks the spot...

I was on a quest to find a Schematic when this post showed up on yahoo ..

I got lucky cause the only thing that was out on my board was Q5 ..
and the main cap was weak...

I used a old BUT11A from a monitor that was in the dumpster..
http://www.datasheetcatalog.com/datasheets_pdf/B/U/T/1/BUT11A.shtml

WHOO HOOO no cracking and popping or hum now...........

LOL I'm glad now my grandson was hammering me to go for a walk..
I saw the monitor sticking up in the dumpster.. Somebody had smashed the monitor ... so all I had to do was grab the main board and leave the rest ... The main board had some nice big heat sinks too ... I also used an old wire harness from the monitor ... The connectors pins on the end of the cable where the perfect width to fit in spot where Q5 used to go ...

[Guest]

[Fiveblades]

I want to thank you guys for bringing me up to date.
Fixed my set now, but used a simular c945 from a old pc power supply.

Recycle rocks !

[Guest]

Hi,

A 6600 system a customer has experienced a similar problem.

Q5 - a H945 transistor (2SC945, 2SC1815) went open. Some minor hear marks are on the PCB, but otherwise no burnt/obvious components.

The resistor values in the other replies are not correct. Correct values are:

R10,11 - 5R6 (5.6 ohms) Green, Blue, Gold
R12 - 1K2 (1.2 Kohms) Brown, Red, Red

Hope this helps,
Ian
([email protected])

[Pascal GAYDON]

Thanks for your help. I could fix the problem followings your reflections.
Efectively this transistor Q5 (H945P) had its Base-Emitter junction cut.
I've replace it by a stronger one : BD137. This transistor gives
10,62 Volts to all IC's M51132L (Volumes controls), reducing the main 19-20 Volts. Because a lot of heating, I've installed it on the dissipating aluminium plate, on the free of power IC's side. You need to drill a 3mm hole and to put a heating transfer isolator because the collector of the BD137 is not isolated and arrives on its rear metallic face. Don't forget it cause it would create a direct short-circuit on the main 20Vdc.
This solution is reliable after big testing.