JVC TH-C3

13 posts / 0 new
Last post
Randy
Randy's picture
JVC TH-C3

Hi' I'm still trying to figure out why I can't get sound through my powered sub for this unit. Headphones plugged into the main unit works but I can't seem to get sound to my sub. Tried new sub still nothing and cable to sub is good. Anyone have a schematic or suggestion? Please help!! It's a JVC TH-C3 home entertainment unit.

Larry Dillon
Larry Dillon's picture
The only thing I can suggest

The only thing I can suggest is make sure your in the proper Decode mode, and or the sourch mode.  If it does not work after you check all of this, take the unit back.  Or has it ever worked?  How old is the set-up?

Randy
Randy's picture
The unit is a couple years

The unit is a couple years old 2 or so and worked fine. Just turned it on one day and no sound. I've checked the source mode and still nothing. Not sure what you mean by Decode mode?

Larry Dillon
Larry Dillon's picture
No if it did work then there

No if it did work then there is a problem inside the unit.  A circuit problem.  Since that is a solid state unit you really should not tinker with it as it may be a minotr problem and you could mess it up more, unless of course you have solid state repair experience.

dans_repair_service
dans_repair_service's picture
I am not familiar with your

I am not familiar with your specific model so I'll need a little info. First, is the sub plugged into the wall? The cable that goes to the sub has how many connections. Is it an RCA type cable similar to the ones connecting your CD or DVD? Dan

Randy
Randy's picture
This  model is a home theater

This  model is a home theater that plays cd dvd and holds 5 discs. Yes the sub does plug into the wall. the only other cable going from the sub to the player isn't RCA it has a round plug-in connector with 8 pins inside at each end. All surround speakers connect to the sub.Thanks

dans_repair_service
dans_repair_service's picture
Thanks for the update.  The

Thanks for the update.  The connection you described suggests that the signals from the main unit are signal level not speaker level.  I'll try and get more info, but this looks like a repair requiring an experienced tech.  If the problem is a switching problem or at the pre-amp level, it is most likely to involve surface mounted components.  These are not things to be attempted without experience.  Let me search a bit and I'll update this as soon as I can.

Dan

Larry Dillon
Larry Dillon's picture
Dan I looked this unit up and

Dan I looked this unit up and it is connected with an s-video plug so yes the unit is a line level input. 

(.775mv) 0db

Randy
Randy's picture
Thanks for finding that out

Thanks for finding that out Dan. I aplogize but I'm a rookie just started an electronics course. What exactly does this mean, what's wrong with my unit?

dans_repair_service
dans_repair_service's picture
I have requested a copy of

I have requested a copy of the service manual.  Once I get it I'll be able to assist further.  It may take a few days.

Dan

Randy
Randy's picture
I got the manual Dan. I

I got the manual Dan. I forwarded it to you. Maybe you can see something to help me out. Thanks,Randy

dans_repair_service
dans_repair_service's picture
Replace the digital

Replace the digital transistor for starts.  That may cure the problem.  I am limited to a slow speed connection for a while, so I have been unsuccessful with the download.  Try the above first and keep us posted.

Dan

Randy
Randy's picture
I already replaced one of the

I already replaced one of the transistors (Q4811) this afternoon and it did the trick.It works! Thanks

 

Connect With Techlore