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You will need to know How to Enter the Service Menu to bring up the Convergence Pattern in order to adjust the Convergence,another thing is it depends on which chassis you have RCA had bought the right to use the name Zenith, when in fact these TVs had RCA Chassis and not Zenith Chassis
Remove the back to Tv, Make sure TV is unpluged and look to see if you have on a board Located on the right hand side
2 Big Black ICs they will have Part number on them example STK392-570 these are your convergence ICs that need to be replaced.You can exchange this board for new board at Zenith exchange moduels 1-800-632-6637
But if you have the RCA Chassis then you will have 2 bottom boards one on the Left hand side will be the Deflection board it will have the FBT flyback transfomer on it and their is 2 Ribbons that connect to the board on the right handside which is the ssb board that has your cable/AV input jacks on it.and their will be 2 boards above the 2 bottom boards if these are the boards you have then you can with Tv Off Press and Hold vol- and ch- wait untill TV comes on,release buttons and then you should be in the service menu to adjust convergence manually. R/G/B
For these chassis PTS rebuilts boards 1-800-844-7871
This is a chassis PTK195 and acommon fault with these sets, that causes the symptom you describe, is the flyback transformer goes bad.
If you're at all familiar with electronic repair you could start checking there (and horizontal output transistor shorts). If not have an RCA approved warrany repairer give you an estimate/service call.
Note: the good thing about these sets is the chassis is very common and easily removed for service (without bringing in the whole set.) .
Usual cost to repair flyback/ dead set symptoms $200-$350.
if it is the chassis im think it is you will have to take the back off looking at the chassis the very front right corner there is a board apporx. 6in. long 2,3 in wide look at the fuse if it's blown take the small board out make sure set is unplugged it just clips in around the edges with plastic clips there are a set of diodes toward the opposite end they make check shorted if so replace there is a part number on the side of the diodes call some shops or go to fry's online maybe
if it is not blown there are 2 wire cable that comes from that board all the way up to another board called the deflection but the easiest way to check it is your board at eye level to the right those wires go there also a brown and green or blue wire to the top left hand corner of that board check with a volt meter on D/C setting for 300 to 340 volts if you have those volteges you could have a problem on the deflection board
RCA > HD52W66 itc222a chassis Reheat
all the surface mount solder points on the Small Signal Board. Then
realign the set including convergence menu. To enter service mode:
power off the set for 10 sec, then hold down Vol- and Ch- buttons for
10 sec. http://home.austin.rr.com/doctorjoe/ITC222align.pdf
Do you hear a click when you try to power it up? If no you may have a blown fuse. But if the fuse is blown chances are a short has caused that condition. Check the fuse to see if its blown and let me know and I will try to help you out with it.