Reply
 
Thread Tools Display Modes
Old 04-25-2012, 07:36 PM   #1
Member
 
Barnman1's Avatar
 
Join Date: Mar 2012
Posts: 53
Legend TV issues

I have a 2012 Cherokee 264L it came with a Legend 23" TV. It has worked fine while plugged in to shore power. I decided since it is a 12V TV and there is a 12V supply next to it, I would get a cable and connect it to the 12V. The label on TV says 4amp and the 120v to 12V adapter that came with the TV says 4amp. I went and got a cigarette lighter adaptor that was 5amp. Connect everything and the 5amp fuse blew. It was a fast acting fuse so I decided to replace it with a slow blow. Connected again and blew the 15amp slide fuse in the converter panel. What gives? Anyone have an explanation of why this is happening? Or can tell me what I can do to put the TV on 12V.
__________________

__________________
Barnman1 is offline   Reply With Quote
Old 04-25-2012, 08:14 PM   #2
Senior Member
 
onetonford's Avatar
 
Join Date: Oct 2010
Posts: 626
Check to see if the adapter has the polarity reversed.
__________________

__________________

2001 Ford F-350 DRW 7.3
2011 25 RL Wildcat
former fiver 1976 Fourwinds had for 35 years
onetonford is offline   Reply With Quote
Old 04-25-2012, 08:42 PM   #3
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,156
OK, here is the thing.

4 amps at 120 volts = 480 Watts

480 watts at 12 volts is 40 amps
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 04-25-2012, 09:20 PM   #4
Senior Member
 
onetonford's Avatar
 
Join Date: Oct 2010
Posts: 626
WOW 40 amps? on TV.... My 22" Vizio the adapter is 120V at 1.5 the Output is 12V at 4.58 amps. That was why I assumed he was talking about 12V power.
__________________

2001 Ford F-350 DRW 7.3
2011 25 RL Wildcat
former fiver 1976 Fourwinds had for 35 years
onetonford is offline   Reply With Quote
Old 04-25-2012, 09:48 PM   #5
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,156
Quote:
Originally Posted by onetonford View Post
WOW 40 amps? on TV.... My 22" Vizio the adapter is 120V at 1.5 the Output is 12V at 4.58 amps. That was why I assumed he was talking about 12V power.
Hmm. 120 volts at 1.5 amps equals 180 watts of input power. The transformer outputs 12 volts times 4.58 amps for 54.96 watts

That transformer must get pretty hot.

I tried to look to see what the 12VDC specs were for his TV but can not find a manual with the power requirements. 4 amps of 120 VAC is a LOT of power for a 23 inch TV. Still looking
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 04-25-2012, 09:56 PM   #6
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,156
No luck. Barnman1 Can you scan the specs page from your manual?
Looking for the watts consumption on the TV.
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 04-25-2012, 10:06 PM   #7
Senior Member
 
onetonford's Avatar
 
Join Date: Oct 2010
Posts: 626
Herk Just look at power transformer again Input power 100-240V 50-60hz 1.5amps
also says AC Adapter and is about 3" x 3" square and 1" thick and very lite for its size Can't be much for a Transformer? I don't think it gets very hot when used in house I will need to check back of TV for it's amps....

Years Ago I had 12V RCA Tube type 12 inch Black and White TV in My Other Fiver and when you Used it it would pull the lights down you could tell it pulled alot of amps with this TV you don't even see a flicker when you turn it on.
__________________

2001 Ford F-350 DRW 7.3
2011 25 RL Wildcat
former fiver 1976 Fourwinds had for 35 years
onetonford is offline   Reply With Quote
Old 04-25-2012, 10:09 PM   #8
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,156
The 4 amps at 120 volts threw me.
That seems real high for a flat screen TV.
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 04-25-2012, 10:15 PM   #9
Jack of All Trades
 
RJHuser's Avatar
 
Join Date: Oct 2010
Location: Fletcher, Ohio
Posts: 265
Hi All:

I looked for the specs on the Legend TV also with no luck.

If the TV says 4 amps, and its 12 VDC input, then 48 Watts.

As far as the transformer stating 1.5 amps at 120 VAC (180 Watts) input, 4.58 amps at 12 VDC (55 Watts) output - welcome to the wonderful world of switching power supplies, not very efficient but small and inexpensive to make.

Thats why they recommend not keeping wall warts plugged in when not in use, they still use several to 10's of watts even when not connected to a device (thus the term "parasite" load).
__________________
Rick & Debbie; Brandy & Schnoodle (Dexter & Fritz R.I.P.) the Doxie "Kids"
2015 Jayco Pinnacle 36RSQS 5'er
2018 GMC Sierra Denali 3500HD, 6.6L Diesel Dually; B&W Companion 5'er hitch
ScanGauge, TST 507 TPMS
RJHuser is offline   Reply With Quote
Old 04-25-2012, 10:18 PM   #10
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,156
22" (21.6") Skyworth LED 12 Volt TV DVD Combo Digital Tuner SLC-2219A

For their 22 inch TV:
Power Requirements: 42 Watts (3.5 Amps max) w/o DVD

42 watts divided by 3.5 amps is 12 volts.


So if his 4 amp fuse is for the DC supply. That is 48 watts; not 480.
__________________

__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:19 AM.