[TechAssist] Re: [ Update ] RCA F35731MB CTC169JS6 - Shuts off when signal source is connected.
- From: "DAMON BRUNGER" <damoneb@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 31 May 2005 07:06:42 -0500
I totally forgot about that.....I think I had to visually remember which way
the flat edge of the transistor was placed before installing a new one.
I suspect the CRT may be pulling too much current, but it isn't the
fault...it's gotta be triggering the
X-ray or overcurrent sense line some how.
Also, if you installed Q2906 backwards you'll need to re - replace it. Been
there, done that.
Damon Brunger
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, May 31, 2005 5:47 AM
Subject: [TechAssist] Re: [ Update ] RCA F35731MB CTC169JS6 - Shuts off when
signal source is connected.
> Watch the board markings closely on that Q2906 LeRoy, seems to me it may
> be marked one way on top and different on bottom.
>
>
> ********************************
> Since 1972 *
> Jim Myers *
> Telrad Electronics *
> Fort Wayne Indiana *
> ********************************
>
>
> LeRoy Westlund wrote:
> > OK,...now I'm back to where I started.
> > Menu is centered OK, speaker got itself shut off for some reason.
> > I bypassed the PIP module, and it still shuts off.
> > PIP module is not the problem.
> > I'm pretty sure I'm looking at a luminance driver problem.
> > Can Q2906 cause this, also ? I'll check that next.
> >
> > LLW
> >
> > LeRoy Westlund
> > Westlund TV & Electronics
> > 97 North Main " I forgot,..to remember,..
> > Centerfield, UT 84622-0087 to forget "
> > Ph./Fax 435-528-3822
> > mailto:LLW@xxxxxxxxxx
> >
> > -----Original Message-----
> > From: LeRoy Westlund <llw@xxxxxxxxxx>
> > To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> > Date: Monday, May 30, 2005 11:50 PM
> > Subject: [ Update ] RCA F35731MB CTC169JS6 - Shuts off when signalsource
is
> > connected.
> >
> >
> >
> >>I lost some ground after working on the PiP module.
> >>I replaced U4 (+5 volt reg.), & R72 (25 ohms).
> >>Set still shut off.
> >>
> >>The problem shifted a little. I lost my sound, and the Menu shifted too
far
> >>to the left.
> >>Now I have to go back and change the Horz caps as needed, again.
> >>In the meantime,.....does anybody have a good used PiP module for this
> >>chassis ?
> >>Numbers on module are: 506107, 2079001-011, & 4W81034-201.
> >>
> >>LLW
> >>
> >>LeRoy Westlund
> >>Westlund TV & Electronics
> >>97 North Main " I forgot,..to remember,..
> >>Centerfield, UT 84622-0087 to forget "
> >>Ph./Fax 435-528-3822
> >>mailto:LLW@xxxxxxxxxx
> >>
> >>-----Original Message-----
> >>From: LeRoy Westlund <llw@xxxxxxxxxx>
> >>To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> >>Date: Monday, May 30, 2005 9:43 PM
> >>Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
> >>signalsource is connected.
> >>
> >>
> >>
> >>>Damon,
> >>>I already replaced the B+ cap. (470 @ 180).
> >>>Right now, I am looking at the PiP module.
> >>>R72 is overheated, and the +5 volt reg. IC4 may be bad.
> >>>If I unplug P8002, the set will run with normal audio, but of course it
> >
> > has
> >
> >>>no picture, so it don't shut down. I'm going to try a new +5 volt reg.
IC4
> >>>on the PiP module.
> >>>
> >>>Later,
> >>>LLW
> >>>
> >>>LeRoy Westlund
> >>>Westlund TV & Electronics
> >>>97 North Main " I forgot,..to remember,..
> >>>Centerfield, UT 84622-0087 to forget "
> >>>Ph./Fax 435-528-3822
> >>>mailto:LLW@xxxxxxxxxx
> >>>
> >>>-----Original Message-----
> >>>From: DAMON BRUNGER <damoneb@xxxxxxxxxxx>
> >>>To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> >>>Date: Monday, May 30, 2005 8:48 PM
> >>>Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
> >>>signalsource is connected.
> >>>
> >>>
> >>>
> >>>>Hmmm, I'm not sure if that Hi Voltage is normal or not. I've never
tested
> >>>>the normal value on this set.
> >>>>200V is a little low, Cr4118's 12V should be 14V after replacement,
and I
> >>>>think you said the B+ run was at 140V, which is a little low
too....not
> >>>
> >>>much
> >>>
> >>>>tho'.
> >>>>
> >>>>Put your meter on the 143V diode located near the SMPS. It's closer to
> >
> > the
> >
> >>>>SMPS than the back of the chassis, located kinda parallel to the Horiz
> >>
> >>heat
> >>
> >>>>sink. Monitor the voltage for a few minutes. If you see that voltage
> >>>>fluctuate by several volts then the 143V cap is dried out......that
> >>
> >>voltage
> >>
> >>>>should be rock solid 143V during run at all times.
> >>>>I have had that cap cause all sorts of shutdown/turn on problems, and
I
> >>
> >>'ve
> >>
> >>>>just been seeing those go bad during the last 6 months.
> >>>>
> >>>>Damon Brunger
> >>>>Telrad Electronics
> >>>>Fort Wayne IN
> >>>>----- Original Message -----
> >>>>From: "LeRoy Westlund" <llw@xxxxxxxxxx>
> >>>>To: <techassist@xxxxxxxxxxxxx>
> >>>>Sent: Monday, May 30, 2005 9:03 PM
> >>>>Subject: [TechAssist] RCA F35731MB CTC169JS6 - Shuts off when signal
> >>
> >>source
> >>
> >>>>is connected.
> >>>>
> >>>>
> >>>>
> >>>>>John,
> >>>>>The Hi-voltage reads 31K.
> >>>>>The 200 volt source reads 191.8 volts.
> >>>>>The screen reads 312 volts.( turning it down, does not help ).
> >>>>>Picture Geometry is perfect. Picture is NOT bowed. Looks perfect.
> >>>>>
> >>>>>LLW
> >>>>>
> >>>>>LeRoy Westlund
> >>>>>Westlund TV & Electronics
> >>>>>97 North Main " I forgot,..to remember,..
> >>>>>Centerfield, UT 84622-0087 to forget "
> >>>>>Ph./Fax 435-528-3822
> >>>>>mailto:LLW@xxxxxxxxxx
> >>>>>
> >>>>>-----Original Message-----
> >>>>>From: John @ Myers TV <myers_tv_b@xxxxxxxxxxxxx>
> >>>>>To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> >>>>>Date: Monday, May 30, 2005 7:07 PM
> >>>>>Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
> >>>>>signalsource is connected.
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Hi Leroy,
> >>>>>>
> >>>>>>What is your high voltage running at? Is the picture geometry OK?
not
> >>>>>>bowed in or out on the sides?
> >>>>>>The next thing I would do is to change the rest of the horizontal
> >>
> >>output
> >>
> >>>>>>caps. Sorry, I don't have the part numbers here, but someone will
> >>>>>>probably jump in with them. I think it is C4401, C4402, C4406)?
> >>>>>>I'm thinking the timing of the hor output might be off.
> >>>>>>
> >>>>>>John Myers
> >>>>>>Myers TV Service Co.
> >>>>>>376 E. State St.
> >>>>>>Alliance, OH 44601
> >>>>>>
> >>>>>>Voice / Fax: 330-821-6545
> >>>>>>Myers_tv_b@xxxxxxxxxxxxx
> >>>>>>http://www.myerstv.net
> >>>>>>
> >>>>>>Work as if you were to live a hundred years,
> >>>>>>Pray as if you were to die tomorrow.
> >>>>>> Ben Franklin
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>LeRoy Westlund wrote:
> >>>>>>
> >>>>>>
> >>>>>>>Hi members,
> >>>>>>>This set will run all day with raster only. As soon as I hook up a
> >>>>
> >>>>signal
> >>>>
> >>>>>>>source (Antenna, or external input), it will shut off after about
10
> >>>>>>>seconds. Picture is beautiful, and all voltages from the power
supply
> >>>>
> >>>>read
> >>>>
> >>>>>>>normal, for that length of time.
> >>>>>>>When it shuts off, I have to unplug the power for at least 5
minutes,
> >>>>>
> >>>>>before
> >>>>>
> >>>>>>>my standby voltages will return.
> >>>>>>>
> >>>>>>>Parts replaced so far, with OEM part numbers :
> >>>>>>>Regulater chopper output. (200165)
> >>>>>>>Regulator IC (200419)
> >>>>>>>Regulator caps. (2.2 @ 100 195691),(15 @ 63 214756),(470 @ 35
> >>>>
> >>>>190496),(39
> >>>>
> >>>>>@
> >>>>>
> >>>>>>>100)
> >>>>>>>Horz cap (.48 @ 250 197518), CR4118 (164589), C4703 (47 @ 250).
> >>>>>>>B+ cap (470 @ 180 200147).
> >>>>>>>Tested luminance buffer Q2906= OK.
> >>>>>>>
> >>>>>>>Voltage readings:
> >>>>>>>B+ = standby = 143.2 (Run = 138.2)(adjusted B+ standby for 140, no
> >>>>
> >>>>help).
> >>>>
> >>>>>>>CR4118 = standby = 13.4 ( Run = 12.1)
> >>>>>>>Voltage Q4101-Base = standby = -.19 ( Run = -1.4)
> >>>>>>>
> >>>>>>>If I pull the CRT socket, set will run OK, and not shut-off.
> >>>>>>>Works the same on my 27" test jig in the shop, as it does hooked up
> >
> > in
> >
> >>>>the
> >>>>
> >>>>>>>home, to the original Yoke / CRT load combination.
> >>>>>>>
> >>>>>>>Would it be wise to replace the IFT at this stage of the game ?
> >>>
> >>>Customer
> >>>
> >>>>>>>does not want to spend more then $200 for this repair. I may need
to
> >>>>>
> >>>>>refund
> >>>>>
> >>>>>>>about $100-165, that I already collected. It worked for about 1/2
> >
> > hour
> >
> >>>>>when
> >>>>>
> >>>>>>>I first took it back, but, it went out again after customer already
> >>>
> >>>paid
> >>>
> >>>>>me.
> >>>>>
> >>>>>>>Anymore help on this would be appreciated.
> >>>>>>>LLW
> >>>>>>>
> >>>>>>>LeRoy Westlund
> >>>>>>>Westlund TV & Electronics
> >>>>>>>97 North Main " I forgot,..to
remember,..
> >>>>>>>Centerfield, UT 84622-0087 to forget "
> >>>>>>>Ph./Fax 435-528-3822
> >>>>>>>mailto:LLW@xxxxxxxxxx
> >>>>>>>
> >>>>>>>
> >>>>>
>
>>>>>>----------------------------------------------------------------------
-
> >
> > -
> >
> >>-
> >>
> >>>-
> >>>
> >>>>>---
> >>>>>
> >>>>>>>This Email List is Public. Remove:
> >>>
> >>>http://www.tech-assist.org/remove.htm
> >>>
> >>>>>>>Lost Password: http://www.tech-assist.org and select "Login
> >>>
> >>>Problems?".
> >>>
> >>>>>>>Appliance Repair List:
> >>>>>
> >>>>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> >>>>>
> >>>>>>>Email Archives: //www.freelists.org/archives/techassist/
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>
>
>>>>>-----------------------------------------------------------------------
-
> >
> > -
> >
> >>-
> >>
> >>>-
> >>>
> >>>>>--
> >>>>>
> >>>>>>This Email List is Public. Remove:
> >>
> >>http://www.tech-assist.org/remove.htm
> >>
> >>>>>>Lost Password: http://www.tech-assist.org and select "Login
> >>
> >>Problems?".
> >>
> >>>>>>Appliance Repair List:
> >>>>>
> >>>>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> >>>>>
> >>>>>>Email Archives: //www.freelists.org/archives/techassist/
> >>>>>>
> >>>>>
>
>>>>>-----------------------------------------------------------------------
> >
> > -
> >
> >>-
> >>
> >>>-
> >>>
> >>>>---
> >>>>
> >>>>>This Email List is Public. Remove:
> >
> > http://www.tech-assist.org/remove.htm
> >
> >>>>>Lost Password: http://www.tech-assist.org and select "Login
> >
> > Problems?".
> >
> >>>>>Appliance Repair List:
> >>>>
> >>>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> >>>>
> >>>>>Email Archives: //www.freelists.org/archives/techassist/
> >>>>>
> >>>>
> >>>>
>
>>>>------------------------------------------------------------------------
-
> >
> > -
> >
> >>-
> >>
> >>>--
> >>>
> >>>>This Email List is Public. Remove:
http://www.tech-assist.org/remove.htm
> >>>>Lost Password: http://www.tech-assist.org and select "Login
Problems?".
> >>>>Appliance Repair List:
> >>>
> >>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> >>>
> >>>>Email Archives: //www.freelists.org/archives/techassist/
> >>>>
> >>>
>
>>>-------------------------------------------------------------------------
-
> >
> > -
> >
> >>--
> >>
> >>>This Email List is Public. Remove:
http://www.tech-assist.org/remove.htm
> >>>Lost Password: http://www.tech-assist.org and select "Login
Problems?".
> >>>Appliance Repair List:
> >>
> >>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> >>
> >>>Email Archives: //www.freelists.org/archives/techassist/
> >>>
> >>
> >
>
> --------------------------------------------------------------------------
---
> > This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
> > Lost Password: http://www.tech-assist.org and select "Login Problems?".
> > Appliance Repair List:
http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> > Email Archives: //www.freelists.org/archives/techassist/
> >
> --------------------------------------------------------------------------
---
> This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
> Lost Password: http://www.tech-assist.org and select "Login Problems?".
> Appliance Repair List:
http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> Email Archives: //www.freelists.org/archives/techassist/
>
-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
