Have the problem that the set will not start up, but I hear the relay click on. I have taken off the back. I can see the middle picture tube arching in the neck. The other two are glowing. Bad tube? I want to know what I am getting into.
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The click is a power relay on the main board and if the red light is on I would suggest looking inside to see if it has more than one relay--follow the power cord into the set----some of these sets have one relay but others have up to 3.
They are know for sticking open or shut. A tap on them can free them..A look inside even by a novice may also reveal something burnt or unplugged etc. view of relay bottom side is up.
GOOD question and well asked----Start at the beginning.
if light on main fuse is good---do you hear the power relay click on and off?
These sets for trouble shooting use a number of green and one red LED inside on the board--the red one should be on when power is connected and the others at turn on all should light--if do this with back off look for the Green ones---when set turned on do all light and then go out--look for one that goes out first or last---each is connected to a specific voltage coming out of the power supply---they will lead you to the area where the trouble is---this set is old enough you may be able to find a service manual online.
I have fixed a lot--going to need a volt/ohm meter for any real tests.
When u turn the tv on,u hear alot of clicking?That mean the Ballast that help the projection bulb to work is dead.Change the Ballast,might as well change the bulb too.U don't know what is the condition of the projection bulb in.
Most of these sets used a mechanical RELAY---it is located somewhere near where the power cord connects to the circuit board---it will be black and rectangular about 3/4 of a inch tall and just over 1 inch wide(black in color with printing on top like TV-5-----12vdc etc)
I bet you are hearing the relay click on and off---A LOT OF THESE SETS HAD PROBLEMS WHERE ONE OF THE 4 PINS THAT HOLD THE RELAY IN BREAK LOOSE WHERE THEY ARE SOLDERED TO THE BOTTOM OF THE BOARD----two pins on one end will be side by side and the two at the other end will be slightly diagonal in position.
If you can unplug the set and get the back off--the entire board should slide out so you can turn it over and look at the solder connections----do not be surprised if one or more of them looks loose or badly soldered
If you see this all you have to do is resolder all four and put the set back together----in some sets you may have to unplug the speakers from the main board to get enough room to turn the board over.
Let me know if you have any questions--I am here to help.
Failure of the HV splitter was a very common problem when I was doing these big screens on the road. The set won't come on if the splitter shorts. We used to test if that was the cause by pulling the HV input lead out of the splitter (leaving it still inside the plastic cup so it wouldn't arc anywhere) and turning the set on. Most often the set would fire right up (without picture of course).
I believe the RCA part number for the splitter is 205064, and it's available from a number of sources. I'm not home right now so I can't check. If I have the number wrong I'll post a follow-up comment.
It sounds like a faulty component on the power supply. Capacitors can cause that click you are describing so if you start your check there you might find the problem pretty quickly. Also check resistors near the faulty cap as these could have been taken out. If you are not able to check this yourself entrust a competant technician. Good luck.
You are probably hearing a relay that is connecting, then disconnecting power because of a fault in the power supply.
Most modern sets try to control damage when a serious fault occurs by shutting down instead of allowing something to burst into flame.
You need on-site help with this one.
Does the red light come on? Do you hear a relay click, Have you unplugged and plugged the set back in? Short of opening the set up you probably have a power supply/deflection issue and will require a tv technician.