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