Lazy Daze Owners' Group

Our 12 year old 12v 32 inch TV quit working. It seems like it’s not getting power. I can’t figure out how to troubleshoot the reason for not getting power. It’s located in the entertainment center. I’ve tested the fuse in the power center and at the fuse at the back of the TV. Both fine. Has anyone had a similar experience with Jensen 12v tv?

is there power to the fuse plug?

Jensen TVs were good for their times but newer TVs are much better and cheaper than they were years ago.
It may be a good time to replace the old one if you can't figure out what is bad with the Jensen.

Larry

I certainly don’t want to insult the OP with this post but I had a similar experience some years ago.   We hadn’t used the TV for a while and somehow had accidentally turned off the 12V switch AND the switch for cable/TV to cable.  Maybe this helps and maybe not!

As I continued to search for my power loss to the tv I found that, in the power control panel, the ground fault plug reset was tripped and would not reset. Maybe the problem may have just manifested itself in the tv? I’m still searching for  answers. How difficult is it to replace a faulty ground fault plug? I’ve never had the pleasure.

How difficult is it to replace a faulty ground fault plug? I’ve never had the pleasure.

Is the GFI breaker in the Power Center tripped or is the problem a GFI receptacle or?
A photo or better description would be helpful.

Try using an extension cord to power the TV to see if it still functions.

Larry

I was able to connect to shore power and reset the GFI. However, I can’t find out why there is no 12v power to the Jensen 32” tv. There are no bad fuses but the little blue light at the left lower corner of the screen won’t light up.

Our 12 year old 12v 32 inch TV wit working. It seems like it’s not getting power. I can’t figure out how to troubleshoot the reason for not getting power. It’s located in the entertainment center. I’ve tested the fuse in the power center and at the fuse at the back of the TV. Both fine. Has anyone had a similar experience with Jensen 12v tv?

If you have one, your antenna power amplifier display should light up when the big "TV POWER" rocker switch is first turned on.  If it doesn't light up then you have no DC voltage to the TV or amplifier.  I would then check (if you are comfortable doing so):

1)  Even though you said it was fine I would swap out the "TV/Antenna Power Amplifier" fuse (mine is fuse #6 and is 7.5 amps) in the panel with another panel fuse of the same amperage.
2)  The next thing I would do is check the tightness of the crimp connections on back of the big "TV Power" rocker switch.  My switch assembly and amplifier are mounted on a wood panel that can be removed by unscrewing 4 screws.
3)  The "TV POWER" rocker switch could also be bad.  You can bypass the switch by connecting the 2 wires on the back of the switch to see if you get power.

If your amplifier display did light up when the "TV POWER" rocker switch is first turned on, then I would check:

1)  That the DC connecter is firmly connected to the TV.
2)  I would replace the TV inline fuse on the back of the TV even though it checked good.



I hope this helps.

Kendall

Thank you very much Kendall. I will check all of those excellent suggested remedies. I know that the power antenna green light does light up when the tv rocker switch is turned on. Also, I replaced the glass fuse on the back of the tv to no avail.
    I’m wondering if the power disconnect connection that goes somehow to the ignition could be involved somehow?  I remember starting the engine with the tv on and it went off. It did work again after that but………….? Anybody familiar with how that is set up? Is there a reset button or a fuse. Where would I look for that?
Thank you. Dale from Downey.

I’m wondering if the power disconnect connection that goes somehow to the ignition could be involved somehow?  I remember starting the engine with the tv on and it went off. It did work again after that but…………

Some LDs I worked on had this feature that prevented the TV's operation when the ignition was on. There is a relay someplace that controls this, wish I knew where.
Remote electrical troubleshooting can be very difficult.

Larry

As Larry said, at some point in the past, the law required that there be a way to prevent the driver from trying to watch the television while driving (!)  Lazy Daze may have had a way to disconnect power to the TV if the ignition were on, so they couldn't be sued by someone for providing a 'hazard'.  RonB

"Anybody familiar with how that is set up?"

Aww, come-on guys, you're going to make me search my foggy brain for that answer? I believe I may have a circuit diagram of the wiring for that very issue... however, it's most probably in the LD, permanently inaccessible to me! As soon as I am able I'll ask the new Captain if she will look for it. Sorry!

"...this feature that prevented the TV's operation when the ignition was on."

So when the OP is trouble shooting is the ignition 'on' or 'off'? If it's off then the problem would seem to be elsewhere!

Some LDs I worked on had this feature that prevented the TV's operation when the ignition was on. There is a relay someplace that controls this, wish I knew where.
Remote electrical troubleshooting can be very difficult.

Larry

This is what the Companion had to say:

TV On While Driving
There may be times when passengers want to watch TV or use the CD player while the Lazy Daze is being driven. For driver safety reasons, some Lazy Dazes are pre-wired so as to prevent the TV or any device run through it from operating while the ignition is on. The following information tells you how to bypass the ignition for passenger viewing. This appears to be an issue with the 31' model only, probably due to placement of the TV in the cabover above the driver.
Older Posts
Home
Subscribe to:
Posts (Atom)
Posted by
Chris
at
12/09/2017 09:52:00 PM
Labels:
TV
Chris Horst: In our 2002 30' with entertainment unit, I was told to disconnect the TV lockout in 2 different places: look for a blue wire directly behind the TV on the driver's side rear corner of the cabinet and/or a blue wire connected to the the yellow/black striped wire in the Ford radio harness accessible by removing the radio. The blue wire receives power only with the ignition switch in run or accessory.
Jim Cummings: In our 2006 30', the solution was a 5-minute fix. In our case, the black Bosch relay box is behind the panel that has the inverter switch, TV amplifier switch, and amplifier plate. The wire was blue with a spade connector. He unplugged that and taped off the spade connector and it works now with the engine on. I am attaching a copy of the photo that Chris took of his wiring. The relay is at the back bottom left. The photo below shows the set-up when the 20" Sony TV was standard and is in a '02 30'. In all newer models, look for the disconnect in the area of the TV amplifier switch and plate.
Understand that driving with the TV on may be illegal, so make this modification at your own risk.

Kendall

Lazy Bones 2 posting diagrams Lazy Bones referred to a few posts back. Hope it helps 😊

I’m’ going to have to take that box apart that contains the off/on switches and amplifier. I’m thinking that I’ll look for that relay from the ignition. Also I can test the toggle switch to the tv by bypassing it.
  I can test that relay to the ignition when I’m in there. If it is blown it would cut the power to the tv, right?
  Who knows, it might just be a loose connection in there.
Dale from Downey. 2012, 27’RB with entertainment center.

New findings on my quest to trace down power loss to tv: I was able to get into the power box in the entertainment center. The off/ on switch has no power to it. Tracing it back there  is black resistor box with six wires coming out of it with blade connectors. I haven’t removed that yet. There is power to that resistor because it also feeds the cigar lighter connector and the antenna amplifier. They both work fine. Before I remove it I think I’m going to see if there is a number or lettering on it. I’m wondering where the best place to find a new resistor would be? Anybody know?

Could you post a picture of it?

Kendall

"... best place to find new resistor..."

I personally use Jameco!
https://www.jameco.com/?CID=GOAW&gclid=EAIaIQobChMIgLj4g-jHhAMV3jWtBh0W1Az_EAAYASAAEgLDSfD_BwE
Search for Passive Components.

However, there are others such as:
Where To Buy Electronic Components? (https://www.build-electronic-circuits.com/buy-electronic-components/)

Since Tandy and Radio Shack are no longer with us it has become difficult to obtain parts and components!

New findings on my quest to trace down power loss to tv: I was able to get into the power box in the entertainment center. The off/ on switch has no power to it. Tracing it back there  is black resistor box with six wires coming out of it with blade connectors.

Not sure what this 'resistor box' would be - is it labeled such? Could it be a relay? If so, two contacts would be the coil and the other four switched contacts...

Steve

You’re correct. NOT resistor box. RELAY BOX. I changed it in the above text. Sorry. I hope it makes better sense now.

I took pictures but can’t remember how to send them. HELP!!

Picture Posting (https://www.lazydazeowners.com/index.php?topic=35583.0)

Pictures of relay to tv. How can I determine if this relay is functioning correctly?

Thank you Kendall for the directions of how to add photos. I have added photos of the relay that supplies power to tv, antenna amp and cigar lighter. How do I know if there is power to the relay?

When you start the RV there should be 12 volts DC across terminals 85 & 86.  I suspect that that the normally closed relay contact is faulty.  To test this out, connect wires 30 & 87A together and see if you have power to the TV (don't forget to turn on the "TV POWER" switch.

Kendall

When you start the RV there should be 12 volts DC across terminals 85 & 86.  I suspect that that the normally closed relay contact is faulty.  To test this out, connect wires 30 & 87A together and see if you have power to the TV (don't forget to turn on the "TV POWER" switch.

Kendall

If you did get power to the TV then the relay is bad.  You now have 2 options:

1) You can replace the relay Relay (https://www.amazon.com/Volt-SPDT-Automotive-Relay-40-AMP/dp/B0073W8BTA) and the TV will not operate when the RV ignition is on.
2) Cut the crimp terminal off of wires 30 & 87A, strip them and wire nut them together which will bypass the relay allowing the TV to be turned on at anytime.

Kendall

Awesome response, Kendall. Thank you for your time and expertise. I found a new relay on Amazon and ordered it yesterday. Delivery date is scheduled for tomorrow (Thursday). I’m planning on trying option 1 by replacing the relay. Then, if I decide to try option 2 and have the ability to use the tv while running the Rv, I will have the information to do that (thanks to you).  I’ll let you know what happens after I install the new relay.
Be well. Dale from Downey.

Dale,

If the new relay doesn't fix it then you may have a power problem before the relay (connecting wires 30 & and 87A will not help).  According to Lazy Bones schematic, DC power is supplied to both the TV & amplifier thru the normally closed relay contact and then the "TV Power" switch.  If one has power they should both have power.  So if your amplifier is on but your TV does not power up then your TV could be bad.

Kendall

Latest news on tv problem(s): a new relay has been installed and still no power to the power switch for the tv. The amplifier green light does come on and goes off, however, when I flip the switch. The fuse link behind the tv has no power either and that fuse is testing good. But, when I test for continuity between the fuse contacts, there is none. So, no power to the tv from the relay from blade 87a on a new relay. It’s not the tv as I plugged in another known good tv to the power plug and it didn’t work. Of course, why would it if there isn’t any power good power supply going into it?
Dale from Downey.

Latest news on tv problem(s): a new relay has been installed and still no power to the power switch for the tv. The amplifier green light does come on and goes off, however, when I flip the switch. The fuse link behind the tv has no power either and that fuse is testing good. But, when I test for continuity between the fuse contacts, there is none. So, no power to the tv from the relay from blade 87a on a new relay. It’s not the tv as I plugged in another known good tv to the power plug and it didn’t work. Of course, why would it if there isn’t any power good power supply going into it?
Dale from Downey.

1)  Dale, are you checking for continuity between the TV fuse contacts with the fuse removed?
2)  How do you know that you are not getting power to the TV?  Do you have a DC voltmeter and if so at what points are you measuring?  If you are getting power to the amplifier then the relay and the "TV Power" switch are working.  If the TV indeed does not have power then there may be a loose wire connection from the "TV POWER" switch to the TV or a loose ground connection wire (trace out the wires starting at the TV).
3)  Can you post a picture of the fuse location and power connection on the back of the TV?
4)  Does your DC outlet work when you switch on the "12V OUTLET" switch?  According to Lazy Bones schematic this also gets power through the relay contacts.

Kendall

1) yes, checking with fuse removed. Nothing.
2)yes, using a voltmeter. I measured at the switch and at the fuse link behind the tv.
4) Yes, the power works to the DC  cigar  lighter outlet. But, it’s not powered through the relay. It has power without the relay being installed.
3) I will send a picture of the back of the tv.