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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
TV shutting off

 
 


cr125cr250
New User

Jun 25, 2011, 1:09 AM

Post #1 of 4 (1615 views)
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TV shutting off Can't Post
RCA F27242GY Chassis CTC185AB3
R4002V Standby Resistor gets so hot after 10 minutes the tv shuts off. What could cause the Rsistor to get so hot.

Thank you


(This post was edited by cr125cr250 on Jun 25, 2011, 1:58 AM)



Ron.M
Veteran


Jun 25, 2011, 3:25 AM

Post #2 of 4 (1600 views)
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Re: [cr125cr250] TV shutting off [In reply to] Can't Post
cr125cr250;....

Quote
What could cause the Rsistor to get so hot.
Sounds like it's not getting return voltage or enough from flyback thru R4113 & CR4703.....
Check R4113 for 100 ohms....
Check CR4703...
R4113 connects to one side of R4002V...
CR4703 connects to one side of R4113...
Those diodes have a way of checking good & still being bad..
Best to just replace it...
Original number is IN4002...
Do NOT use just any diode to replace it as it's in a high frqequency circuit...

Check voltage at junction of R4002V & R4113...
Should be about ~20 vdc when set is on...
Also take a looksee at pin #3 of U4102 & see if you are getting a FULL 12 vdc when set is on....
Also , how does the pix look & is sound OK when it's on ???

Please post results....

THANKS....Smile....



Have a GREAT evening....Sly...


Later...Ron.M...Cool....
Veteran & Retired TV technician


cr125cr250
New User

Jun 25, 2011, 11:57 AM

Post #3 of 4 (1592 views)
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Re: [cr125cr250] TV shutting off [In reply to] Can't Post
Ron M.
Thank you for your quick reply. I will give it a try.
Have a nice day


Repair man
Enthusiast


Jun 29, 2011, 7:09 AM

Post #4 of 4 (1539 views)
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Re: [cr125cr250] TV shutting off [In reply to] Can't Post
Found this in my notes -- R4002 high wattage resistor overheats when plugged in. Diode CR4110 shorted 27V 1.3W zener.









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