Samsung LA19R71B not accepting antenna input
 

The Samsung LA19R71B is a 19" LCD TV.
I was using it with the RF output of my Commodore C64C.
Channel search works but no channels are detected.

Samsung LA19R71B not accepting antenna input
 

On Mon, 05 Nov 2018 15:02:48 +1100, Lucifer
wrote:

The Samsung LA19R71B is a 19" LCD TV.
I was using it with the RF output of my Commodore C64C.
Channel search works but no channels are detected.

For the C64, make sure the tuner in the TV is set to OTA (over the
air) and NOT to CATV (cable television).

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Samsung LA19R71B not accepting antenna input
 

On Sun, 04 Nov 2018 21:47:35 -0800, Jeff Liebermann
wrote:

On Mon, 05 Nov 2018 15:02:48 +1100, Lucifer
wrote:

The Samsung LA19R71B is a 19" LCD TV.
I was using it with the RF output of my Commodore C64C.
Channel search works but no channels are detected.

For the C64, make sure the tuner in the TV is set to OTA (over the
air) and NOT to CATV (cable television).

I will check that but it was working with the Samsung.
The C64C works with a different TV and the Samsung will not detect
the output of an analogue TV modulator.

Samsung LA19R71B not accepting antenna input
 

On Monday, November 5, 2018 at 12:47:37 AM UTC-5, Jeff Liebermann wrote:
On Mon, 05 Nov 2018 15:02:48 +1100, Lucifer
wrote:

The Samsung LA19R71B is a 19" LCD TV.
I was using it with the RF output of my Commodore C64C.
Channel search works but no channels are detected.

For the C64, make sure the tuner in the TV is set to OTA (over the
air) and NOT to CATV (cable television).


That actually won't matter. 2-13 on CATV or analog OTA are the same frequencies assuming he's looking for channel 3 or 4 which just about every modulator in the U.S. used. If the modulator's output was in the UHF band, then selecting OTA instead of CATV would be necessary.

Probably has a bad tuner.

Samsung LA19R71B not accepting antenna input
 

On Mon, 5 Nov 2018 07:19:38 -0800 (PST), John-Del
wrote:

On Monday, November 5, 2018 at 12:47:37 AM UTC-5, Jeff Liebermann wrote:
On Mon, 05 Nov 2018 15:02:48 +1100, Lucifer
wrote:

The Samsung LA19R71B is a 19" LCD TV.
I was using it with the RF output of my Commodore C64C.
Channel search works but no channels are detected.

For the C64, make sure the tuner in the TV is set to OTA (over the
air) and NOT to CATV (cable television).

That actually won't matter. 2-13 on CATV or analog OTA are the
same frequencies assuming he's looking for channel 3 or 4 which
just about every modulator in the U.S. used. If the modulator's
output was in the UHF band, then selecting OTA instead of CATV
would be necessary.

Oops, your right. Bad guess(tm):
"CATV FREQUENCY ASSIGNMENT"
http://www.annsgarden.com/telecom/CATV.html

Probably has a bad tuner.

Maybe. It would be nice to know what "Channel search works" really
means. Does it find and display any other OTA stations? If it does
find and display other stations, then the tuner is not broken.

Try MANUALLY saving whatever channel the C64 video modulator is
allegedly producing. Be sure to select "Air Channel Mode".
Instructions are on Pg 10 of the user manual:
http://downloadcenter.samsung.com/content/UM/200706/20070615181620671_BN68-01287A-01Eng-0601.pdf
It might be helpful to know what country you are in. Bigpond.com is
in Australia, so you would set the "color system" to PAL (or AUTO). If
you still can't get a picture with everything set manually, and the
C64 works on other TV's, and the Channel Scan does NOT find other OTA
stations, then your tuner is broken.



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Samsung LA19R71B not accepting antenna input
 

On Monday, November 5, 2018 at 11:30:28 AM UTC-5, Jeff Liebermann wrote:
On Mon, 5 Nov 2018 07:19:38 -0800 (PST), John-Del
wrote:

On Monday, November 5, 2018 at 12:47:37 AM UTC-5, Jeff Liebermann wrote:
On Mon, 05 Nov 2018 15:02:48 +1100, Lucifer
wrote:

The Samsung LA19R71B is a 19" LCD TV.
I was using it with the RF output of my Commodore C64C.
Channel search works but no channels are detected.

For the C64, make sure the tuner in the TV is set to OTA (over the
air) and NOT to CATV (cable television).

That actually won't matter. 2-13 on CATV or analog OTA are the
same frequencies assuming he's looking for channel 3 or 4 which
just about every modulator in the U.S. used. If the modulator's
output was in the UHF band, then selecting OTA instead of CATV
would be necessary.

Oops, your right. Bad guess(tm):
"CATV FREQUENCY ASSIGNMENT"
http://www.annsgarden.com/telecom/CATV.html

Probably has a bad tuner.

Maybe. It would be nice to know what "Channel search works" really
means. Does it find and display any other OTA stations? If it does
find and display other stations, then the tuner is not broken.

Could still be a bad tuner. Since the dawn of time (or at least the dawn of TV), we've seen plenty of tuners that would work on one band, but not on others. Before cable boxes, we'd see plenty of tuners that had no 2 to 6 (VHF low), no 7-13 (VHF hi), or no mid band or high band CATV (can no longer remember the line of demarcation of the those), or UHF. Today, we add digital OTA functions to the legacy bands.

So even if he scanned OTA with a cheap antenna and received one or two digital TV channels, it still wouldn't prove his tuner was OK.

BUT, if his modulator works on any low band VHF channel, he can enter the number manually as you suggest if he has a remote, or if the menu allows it (doubtful on newer TVs).

Samsung LA19R71B not accepting antenna input
 

So even if he scanned OTA with a cheap antenna and received one or two digital TV channels, it still wouldn't prove his tuner was OK.

BUT, if his modulator works on any low band VHF channel, he can enter the number manually as you suggest if he has a remote, or if the menu allows it (doubtful on newer TVs).

maybe the new samsung is using a fancy algorithm where instead of just looking for an RF signal it is looking for sync, or maybe it is looking for only ATSC signals now.

In any case, try manual config or connect another ch 3 source to the samsung that it can find.

mark