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RCA Model: F26634SF Chassis: CTC187AB    
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irish634



Joined: 13 Sep 2010
Posts: 4
Location: PA

PostPosted: Mon Sep 13, 2010 8:17 pm    Post subject: RCA Model: F26634SF Chassis: CTC187AB Reply with quote

Hello,

I found this site through google. Searching through the archives I've found a few helpful hints but I thought I'd ask directly.

I bought this TV at a yard sale. It works absolutely fine when I use the RCA jacks. If I plug the cable to the RF input, I have no signal.

Could the fix be as simple as changing the RF connector?
Are there any resistances/capacitances I can check?
Are there any other checks I can do?

I work for a PCB assembly shop so I am able to solder and if not, do have someone that can. But I know bupkis about TV repair.

Thank you
Google

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JTS1957



Joined: 21 Jan 2009
Posts: 2389
Location: Far, Far Away

PostPosted: Mon Sep 13, 2010 8:58 pm    Post subject: Reply with quote

irish634 wrote:
If I plug the cable to the RF input, I have no signal.


Is this "cable" connected to your cable company? Is tuning set to cable then you auto-program? Has your cable company redistributed their programming so that you need their box to receive them?

Is this "cable" connected to your outdoor aerial? Is tuning set to air/broadcast then you auto-program? Are there still analog stations for it to receive? Or do you have a DTV box connected?
irish634



Joined: 13 Sep 2010
Posts: 4
Location: PA

PostPosted: Tue Sep 14, 2010 6:42 am    Post subject: Reply with quote

Hello, and thank you for the reply.

*Yes the cable is run from the cable company.

*I only have basic cable so I do not need a converter box at all. I have 3 other TVs that work fine by simply hooking the cable to the RF jack.

*Input is set correctly (cable) and auto program has nothing but static.

This TV works fine if I run the cable to the VCR/DVD and then connect to the Audio/Video RCA jacks.

When I have nothing connected, I have nothing but static (snow).
When I connect the cable to the RF jack, I have nothing but static. I can take the same cable, connect it to another TV and that TV works fine.
kuhurdler



Joined: 28 Dec 2006
Posts: 2878
Location: Overland Park, KS

PostPosted: Tue Sep 14, 2010 7:17 am    Post subject: Reply with quote

open it up and look at the tuner
this may be one of the models that has the onboard tuner
irish634



Joined: 13 Sep 2010
Posts: 4
Location: PA

PostPosted: Tue Sep 14, 2010 7:20 am    Post subject: Reply with quote

It's open (at home I'm at work now). What do I look for?

I do believe it does have the on-board tuner just from the research I've done on the forum.
http://www.riddledtv.com/forums/loose-coax-connector-rca-t1902,highlight,ctc187ab.html
Google

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JTS1957



Joined: 21 Jan 2009
Posts: 2389
Location: Far, Far Away

PostPosted: Tue Sep 14, 2010 10:37 am    Post subject: Reply with quote

Start by removing the top and bottom covers from the tuner. These tuners use the frame/shield as ground "jumpers." If any point on the outer or inner frame develop a bad solder joint, parts are no longer connected to "ground." Resolder all frame/shield (ground) joints.

You could have lost a B-Plus source to the tuner. One of the tuner ICs could be bad.

Service/Training literature and even eeprom dumps are available galore: http://elektrotanya.com/?q=showresult&megnev=&megnev2=ctc187&kategoria=&kat2=all
irish634



Joined: 13 Sep 2010
Posts: 4
Location: PA

PostPosted: Tue Sep 14, 2010 7:06 pm    Post subject: Reply with quote

After removing the bottom cover of the tuner, I found the center pin contact of the RF connector with a cracked solder joint. This is the center pin contact to the PCB.

Re-soldered and re-assembled and I now have a working TV.

Thank you.
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