Problem with JVC TV Vide2 input

[Dan]

I have a JVC TV, model AV-35BH4. It's about 6-7 years old. Everything
works fine except the Video-2 input. This TV has 3 inputs: Video-1 has
S-video and composite, Video-2 is composite only, and Video-3 is for
antenna/cable input and is coax only.

I tried to hook up a 2nd source (my Xbox) to the Video-2 input and get
only a very faint, dark, scrambled image. If I pull up the TV menu it
displays distorted if the X-box output is connection. If I disconnect
the X-box the TV menu looks fine.

Note that TV shows the X-box output just fine on Video-1. I have not
tested it on Video-3, as I don't have a composite to coax converter.

Any ideas? Thanks,

Dan

 

[Dan]

Thanks for the reply, Wizard. But to be clear - this isn't an Xbox
issue. I can't get source to display properly on the Video2 input. For
example, the component output from my TiVo works fine on Video1, but I
get a dark, scrambled signal when I connect it to Video2.

It looks to me like the signal isn't syncing, but I have no idea how
or why this could be happening.

Anyone have an idea how I could diagnose this without calling in a pro
repair guy?

Thanks,
Dan

Xbox is component output by default out of box and needs dongle cables
or converter box to adapt to either S-video or composite. JVC of this
vintage doesn't have component input, keep that in mind.

But any JVC even new ones is very nice set through. Take care of
yours well.

Cheers,

Wizard




Any ideas? Thanks,

Dan

 

[Jason D.]

On 2 Apr 2004 09:08:09 -0800, dan_johnson2929@yahoo.com (Dan) wrote:

Thanks for the reply, Wizard. But to be clear - this isn't an Xbox
issue. I can't get source to display properly on the Video2 input. For
example, the component output from my TiVo works fine on Video1, but I
get a dark, scrambled signal when I connect it to Video2.

It looks to me like the signal isn't syncing, but I have no idea how
or why this could be happening.

Anyone have an idea how I could diagnose this without calling in a pro
repair guy?

Thanks,
Dan

Dan,

There's component video again, not same meaning as composite.

There are many types of signals. Component is one of them, it uses
three plug system (Yb, Pb and C).

Also AV-35BH4 doesn't support component video, only s-video,
composite or RF.

By the way, There's no number 3, the RF connector (that one cable or
antenna connects to that is RF connector. Video 1 is the S-video or
composite (not both), Video 2 is composite as you stated.

I repair JVC new and vintages like yours and other brands daily so I
know their JVC style well, get yours set fixed. There is a problem in
the switching video area that is degrading the signal quality from
that video 2. You do have no problems using S-video or video 1?
Composite is routed through video switch circuits then through comb
filter circuit to split composite into Y (luma) and C (chroma aka
color info) which is what S video is then back to jungle IC. S-video
alsos goes through video switch and directly to the jungle IC
bypassing comb filter.

Tuner video output needs much pre-processing before outputting
composite video and helps to tune into channels via feedback circuits,
Signal from tuner goes into jungle IC then out again to the video
switch circuit (same circuit that taks inputs) then through same comb
filter circuit then back to then jungle. Not much have changed in
concept over the years except for junk and odd balls.

I can tell the differences in quality using RF, composite, S-video and
component. Least to best in that order, seperate signals allows more
bandwith for the info to transmit through wires, hence less picture
quality loss.

Cheers,

Wizard

 

[Dan]

Wizard,

My mistake in using "component" when I meant composit. I have a
Toshiba HDTV with component inputs and am well aware of the
difference, even if my fingers are not.

To answer your question, I do not have problems using the S-video on
video 1, nor do I have any problems with the composite input on video
1. The RF input also works fine. The video 2 is the only input giving
me problems, regardless of source.

Based on your feedback it sounds like I need to call a repair person.

Thanks for your help,

Dan



jpero@sympatico.ca (Jason D.) wrote in message news:<406e2f84.6295520@news1.on.sympatico.ca>...

On 2 Apr 2004 09:08:09 -0800, dan_johnson2929@yahoo.com (Dan) wrote:

Thanks for the reply, Wizard. But to be clear - this isn't an Xbox
issue. I can't get source to display properly on the Video2 input. For
example, the component output from my TiVo works fine on Video1, but I
get a dark, scrambled signal when I connect it to Video2.

It looks to me like the signal isn't syncing, but I have no idea how
or why this could be happening.

Anyone have an idea how I could diagnose this without calling in a pro
repair guy?

Thanks,
Dan

Dan,

There's component video again, not same meaning as composite.

There are many types of signals. Component is one of them, it uses
three plug system (Yb, Pb and C).

Also AV-35BH4 doesn't support component video, only s-video,
composite or RF.

By the way, There's no number 3, the RF connector (that one cable or
antenna connects to that is RF connector. Video 1 is the S-video or
composite (not both), Video 2 is composite as you stated.

I repair JVC new and vintages like yours and other brands daily so I
know their JVC style well, get yours set fixed. There is a problem in
the switching video area that is degrading the signal quality from
that video 2. You do have no problems using S-video or video 1?
Composite is routed through video switch circuits then through comb
filter circuit to split composite into Y (luma) and C (chroma aka
color info) which is what S video is then back to jungle IC. S-video
alsos goes through video switch and directly to the jungle IC
bypassing comb filter.

Tuner video output needs much pre-processing before outputting
composite video and helps to tune into channels via feedback circuits,
Signal from tuner goes into jungle IC then out again to the video
switch circuit (same circuit that taks inputs) then through same comb
filter circuit then back to then jungle. Not much have changed in
concept over the years except for junk and odd balls.

I can tell the differences in quality using RF, composite, S-video and
component. Least to best in that order, seperate signals allows more
bandwith for the info to transmit through wires, hence less picture
quality loss.

Cheers,

Wizard