[TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
- From: "Mouton's Electronics" <moutons@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 30 Oct 2002 22:53:57 -0600
If you have 5V on pin 2 of the micro (the reset line) then this will not be
your problem. I do have a training manual that may give you some help and
portions of the schematic. I will send it to your hotmail account, it is
just over 1Mb hope you have the space.
hth
Jason Mouton
Mouton's Electronics
1116 Center St.
New Iberia, LA 70560
337-364-1641 Phone/Fax
moutons@xxxxxxxxxxxxxxxx
----- Original Message -----
From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, October 30, 2002 10:26 PM
Subject: [TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
>
> I need to make shure we are on the same page C3126 seems several steps
> removed. On this set (going by board markings) pin 2 goes to r120 that
feeds
> to the collector of Q3101 the base of this transistor has 0.02V which
should
> be below turn on voltage (0.6V typ min). The base goes to R135 that goes
to
> the collector of Q102 (has 0.02V) C126 is off the emmiter of Q102 there
does
> not seem any leakage at that point. C126 appears to be in the emmiter
circut
> of Q102...??? (the Tuner input is still isolated from chassis ground too)
>
>
> Peter Oliver
> Tucson Radio TV
>
>
> From: "Mouton's Electronics" <moutons@xxxxxxxxxxxxxxxx>
> Reply-To: techassist@xxxxxxxxxxxxx
> To: <techassist@xxxxxxxxxxxxx>
> Subject: [TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
> Date: Mon, 28 Oct 2002 09:24:09 -0600
>
>
> I have had a similar problem and found more than 5 or 6 times it was in
the
> reset circuit. Check Q3101 (base), it is a surface mount near the Micro
> (collector connects to pin 2 of the micro through R3120 surfacemount). If
is
> has any base voltage the likely cause is C3126 surfacemount (base voltage
> should be 0). Remove the capacitor and clean the glue under it also
replace
> the capacitor. It always checks good but you should put a new one anyway.
>
> Hope this helps
>
> Jason Mouton
> Mouton's Electronics
> 1116 Center St.
> New Iberia, LA 70560
> 337-364-1641 Phone/Fax
> moutons@xxxxxxxxxxxxxxxx
>
>
> ----- Original Message -----
> From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, October 27, 2002 5:54 PM
> Subject: [TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
>
>
> >
> > I need to look Didn't note that check point on my way out the door
> > yesterday, today I'm not at work. There are no FBT dervied voltages
since
> > there is no oscilation. Only B+ derived.
> >
> > Peter Oliver
> > Tucson Radio TV
> >
> >
> >
> >
> >
> >
> > From: "al m" <ampm@xxxxxxx>
> > Reply-To: techassist@xxxxxxxxxxxxx
> > To: <techassist@xxxxxxxxxxxxx>
> > Subject: [TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
> > Date: Sun, 27 Oct 2002 12:46:15 -0500
> >
> >
> > do you have your 7.5v on pin 20 of U1001
> > al marquardt
> > ampm@xxxxxxx
> >
> >
> > ----- Original Message -----
> > From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, October 27, 2002 9:51 AM
> > Subject: [TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
> >
> >
> > >
> > > The 5V supply is present at the front buttons.
> > >
> > > Peter Oliver
> > > Tucson Radio TV
> > >
> > >
> > >
> > > From: "al m" <ampm@xxxxxxx>
> > > Reply-To: techassist@xxxxxxxxxxxxx
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Subject: [TechAssist] Re: RCA CTC185AB Dead F25216WT may 1996
> > > Date: Sun, 27 Oct 2002 08:13:58 -0500
> > >
> > >
> > > You don't mention the 5V supply anywhere. Do you have a scat?
> > > al marquardt
> > > ampm@xxxxxxx
> > >
> > >
> > > ----- Original Message -----
> > > From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Saturday, October 26, 2002 5:34 PM
> > > Subject: [TechAssist] RCA CTC185AB Dead F25216WT may 1996
> > >
> > >
> > > >
> > > >
> > > > RCA model F25216WT
> > > > Chassis ctc185AB
> > > > MFD May 1996
> > > > Symptom DEAD no flux at plug in no attempt to start or turn on
> > > >
> > > > Has voltage
> > > > Q4114 D=165V, S=162V, G= 135V
> > > >
> > > > Q4401 H.O.T Collector = 162V
> > > >
> > > > U4107 (12V reg) pin 1 (in)= 27V pin 3 (out)=11.9
> > > > CR4110 cathode= 27.8V
> > > > saw tip for CR4704 replaced no change.
> > > >
> > > > The regulator and H.O.T. test normal in circut this set still has
> the
> > > > electoltic in regulator circurt.. I have the regulator KIT but it
> > doesn't
> > > > have all the symptoms, ie usually the regulator blows. The
customer
> > said
> > > it
> > > > just stopped working.. Any ideas
> > > >
> > > >
> > > > Peter Oliver
> > > > Tucson Radio TV
> > > >
> > > >
> > > >
> > > >
> > > > _________________________________________________________________
> > > > Unlimited Internet access for only $21.95/month. Try MSN!
> > > > http://resourcecenter.msn.com/access/plans/2monthsfree.asp
> > > >
> > > > ------------------------------------------
> > > > To REMOVE your email address, click here:
> > > > http://www.tech-assist.org/unsubb.html
> > > > To CHANGE your email address, click here:
> > > > http://www.techassist.net/forms/change.html
> > > > ------------------------------------------
> > > > ***NEW*** Tips Added Instantly!!!***
> > > > Submit Repair Tips here:
> > > > http://www.tech-assist.org/secure/tip/
> > > >
> > > >
> > >
> > >
> > > ------------------------------------------
> > > To REMOVE your email address, click here:
> > > http://www.tech-assist.org/unsubb.html
> > > To CHANGE your email address, click here:
> > > http://www.techassist.net/forms/change.html
> > > ------------------------------------------
> > > ***NEW*** Tips Added Instantly!!!***
> > > Submit Repair Tips here:
> > > http://www.tech-assist.org/secure/tip/
> > >
> > >
> > > _________________________________________________________________
> > > Protect your PC - get McAfee.com VirusScan Online
> > > http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
> > >
> > > ------------------------------------------
> > > To REMOVE your email address, click here:
> > > http://www.tech-assist.org/unsubb.html
> > > To CHANGE your email address, click here:
> > > http://www.techassist.net/forms/change.html
> > > ------------------------------------------
> > > ***NEW*** Tips Added Instantly!!!***
> > > Submit Repair Tips here:
> > > http://www.tech-assist.org/secure/tip/
> > >
> > >
> >
> >
> > ------------------------------------------
> > To REMOVE your email address, click here:
> > http://www.tech-assist.org/unsubb.html
> > To CHANGE your email address, click here:
> > http://www.techassist.net/forms/change.html
> > ------------------------------------------
> > ***NEW*** Tips Added Instantly!!!***
> > Submit Repair Tips here:
> > http://www.tech-assist.org/secure/tip/
> >
> >
> > _________________________________________________________________
> > Choose an Internet access plan right for you -- try MSN!
> > http://resourcecenter.msn.com/access/plans/default.asp
> >
> > ------------------------------------------
> > To REMOVE your email address, click here:
> > http://www.tech-assist.org/unsubb.html
> > To CHANGE your email address, click here:
> > http://www.techassist.net/forms/change.html
> > ------------------------------------------
> > ***NEW*** Tips Added Instantly!!!***
> > Submit Repair Tips here:
> > http://www.tech-assist.org/secure/tip/
>
>
> ------------------------------------------
> To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
> To CHANGE your email address, click here:
> http://www.techassist.net/forms/change.html
> ------------------------------------------
> ***NEW*** Tips Added Instantly!!!***
> Submit Repair Tips here:
> http://www.tech-assist.org/secure/tip/
>
>
> _________________________________________________________________
> Protect your PC - get McAfee.com VirusScan Online
> http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
>
> ------------------------------------------
> To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
> To CHANGE your email address, click here:
> http://www.techassist.net/forms/change.html
> ------------------------------------------
> ***NEW*** Tips Added Instantly!!!***
> Submit Repair Tips here:
> http://www.tech-assist.org/secure/tip/
>
------------------------------------------
To REMOVE your email address, click here:
http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
http://www.techassist.net/forms/change.html
------------------------------------------
***NEW*** Tips Added Instantly!!!***
Submit Repair Tips here:
http://www.tech-assist.org/secure/tip/
Other related posts:
