[TechAssist] Re: FIXED, RCA CTC131M, dead.

Replace it with a 103 deg C thermal fuse. Avail from NTE or other 
suppliers. Mount the fuse firmly on the primary winding and replace tape 
covering on winding.

Al G
Al's TV-Electronics
Pembroke Ont.
Canada

Kevin wrote:
> So by bypassing the fuse, this set is not safe to send out?
> 
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx 
>  
> 
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Phil Bader
> Sent: Friday, December 10, 2004 5:54 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: FIXED, RCA CTC131M, dead.
> 
> Yes. Internal thermal cutoff in series with primary winding. You are 
> simply bypassing the fuse.
> Phil Bader
> 
> Kevin wrote:
> 
> 
>>Solution was standby transformer was open.  I took apart the
> 
> transformer
> 
>>and found a wire that wasn't connected to the set, but was connected to
>>one side of the primary that was open.  Is this wire (second winding)
>>protected by a thermal fuse inside the transformer?  The transformer
>>measures about 20 ohms.   
>>
>>With this temporary fix, I found vertical foldover at the top of the
>>picture.  Replacing C512, a 4.7uF @ 100 volts cured it.  
>>
>>Kevin Wilks
>>Kevin's TV & Video Repair
>>Penticton BC Canada
>>kevintv@xxxxxxx 
>>
>>
>>-----Original Message-----
>>From: techassist-bounce@xxxxxxxxxxxxx
>>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of tvservice
>>Sent: Wednesday, December 08, 2004 2:32 PM
>>To: techassist@xxxxxxxxxxxxx
>>Subject: [TechAssist] Re: RCA CTC131M, dead.
>>
>>Kevin
>>tighten screws to chopper power transistor and solder leads to socket.
>>If still won't come on look for single red wire from tuner assembly
> 
> that
> 
>>plugs in near power supply
>>with ac power applied pull this wire loose , if set powers on (will
> 
> have
> 
>>loud volume and raster on screen but no tuner operation)
>>go back and recheck tuner control assembly, usually solder connections
>>and
>>bad electrolytic caps.
>>If still doesn't come on look for power supply problems
>>hth
>>Robert
>>tvservice@xxxxxxxxxxxxx
>>H & H Electronics Inc
>>
>>----- Original Message ----- 
>>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Wednesday, December 08, 2004 4:13 PM
>>Subject: [TechAssist] Re: RCA CTC131M, dead.
>>
>>
>> 
>>
>>
>>>CTC133B: may not turn on or turns on erratically:
>>>Choke L403 coupling the +131V source to "source 1"(on sams) had cold
>>>solder connection.Located  near rectifiers at front of chassis.
>>>CTC130:
>>>Immediate shutdown after turn on.With variac lowering AC voltage it
>>>cycled on/off moments later fkyback exploded.
>>>CTC131A: dead. Chopper output Q101. tighten screws and pins. (metal
>>>   
>>>
>>
>>case
>> 
>>
>>
>>>part)
>>>CTC133B: Lightning, dead. Repl. tuner/remote module MTT008A. and
>>>   
>>>
>>
>>chassis
>> 
>>
>>
>>>parts: R102(2.7 ohm 15W), F100(5A fuse),Q100 (VIPUR FET# 164599).
>>>CTC130: Dead. blows 5A fuse:
>>>cap C425 (.43mfd@200v) shorted.(HOT collector measured 0 ohms to gnd
>>>until yoke plug removed as test)Also R101 3.9 ohm 10 watt open.
>>>Hope these arcaic records help.
>>>;-)
>>>Phil Bader
>>>
>>>
>>>Kevin wrote:
>>>
>>>   
>>>
>>>
>>>>This is a 19 year old 27" RCA that will not power up.  I soldered the
>>>>infamous tuner connections, with no difference and the fuse and HOT
>>>>tested good.  This is the most difficult chassis that I have worked
>>>>     
>>>>
>>
>>on.
>> 
>>
>>
>>>>Are there any common failures with this chassis?  TIA.
>>>>
>>>>Kevin Wilks
>>>>Kevin's TV & Video Repair
>>>>Penticton BC Canada
>>>>kevintv@xxxxxxx
>>>>
>>>>
>>>>
>>>>
>>>>     
>>>>
>>>
>>>----------------------------------------------------------------------
> 
> -
> 
>>>   
>>>
>>
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>>>>
>>>>     
>>>>
>>>
>>>-- 
>>>
>>>Philip Bader
>>>Jan Phyl TV Inc. (estab. 1976)
>>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>>Fax (863) 299-8821
>>>email: tjanphyl@xxxxxxxxxxxxxxx
>>>
>>>
>>>
>>>
>>>   
>>>
>>
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