[TechAssist] Re: FIXED, RCA CTC131M, dead.
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 10 Dec 2004 08:53:31 -0500
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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>>
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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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--
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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Other related posts:
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- » [TechAssist] Re: FIXED, RCA CTC131M, dead.
- » [TechAssist] Re: FIXED, RCA CTC131M, dead.
- » [TechAssist] Re: FIXED, RCA CTC131M, dead.
