[TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 12 Jul 2005 14:57:03 -0400
Where is this part located Gary?
David Lessard
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Gary McCartney
Sent: Tuesday, July 12, 2005 2:57 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
I have tip here says to replace CR4118 for no OSG.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
David Lessard wrote:
> Okay, I see the OSG path now, it's from pin 24 of the micro via Q2903
> over to Q5004 on the CRT PCB. Now to check if I get an OSG signal or
> not, I'll let you know what I find.
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Tuesday, July 12, 2005 2:02 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> FOLLOWUP:
>
> I stand corrected on a few things here. What I did was grab a remote
to
> check certain things out, what I found is I can select channels via
the
> tuner, I can select channel 91 and make A/V inputs the source, I can
> adjust volume and change channels. What I can't do is adjust video or
> audio or get into the setup screen. There is no OSG, I'm not sure if I
> have a complete schematic here as I can not find what IC does the OSG.
I
> need some help with this OSG stuff please.
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Tuesday, July 12, 2005 1:38 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> Forgot to mention A/V inputs work but not the way they are supposed
to.
> As soon as the TV is turned "ON" the A/V inputs are selected as the
> source, pressing CH up or down does nothing, VOL up and down works,
> other then that no OSG when SETUP, AUDIO or VIDEO is pressed. So
> basically I have no tuner being selected as the source and no OSG. My
> question is what IC generates the OSG? Has anyone seen this problem
> before?
>
> Thanks again,
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Tuesday, July 12, 2005 1:06 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> Received micro and installed it, TV fired-up but no video, no audio,
no
> OSG. Turning up the screen level on FBT I see retrace lines and a
> purplish screen. I'm going to check voltage around jungle IC; it's
> possible I may need a jungle IC too. Any pointers/tips would be
> appreciated.
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Wednesday, June 29, 2005 12:09 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> Gentlemen,
>
> I'm not able to locate a used part for this chassis. Customer would
like
> to keep this nice wooden cabinet TV for sentimental reasons. PCB
> location is U3101 - microcontroller. Number on the IC:
>
> 1A66111-01E
> 2 9131
> TCE1991
>
> If anyone has this micro in there junk pile(s) please email me in
> private naming your price.
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
> K0C-1A0
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Old TV Man
> Sent: Tuesday, June 28, 2005 4:45 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> David - Do you have a part # or a number off of the U3101?
>
> Max Bonnell
> Bonnell TV
> Robinson, IL
>
> Sender: techassist-bounce@xxxxxxxxxxxxx From:
> mr_fixit@xxxxxxxxxxxx(David=A0Lessard) Date: Tue, Jun 28, 2005, 3:15pm
> (CDT+1) To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: RCA 27"
> TV - CTC167CS - Dead After Storm Reply=A0to: techassist@xxxxxxxxxxxxx
>
> Thanks for the service manual Eric. Once in hand it was easy to trace
> the problem to U3101 pin 42, Vcc to ground is shorted, no shorts
> anywhere else. Now to find one! Does anyone have a used one kicking
> around? I don't believe this chassis's micro is still available. Of
> course I won't know if anything else is a problem until I get the
micro
> replaced.
> Thanks in advance,
> God bless you all,
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxxx
> Alexandria, Ontario, Canada
> K0C-1A0
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne Vanaman
> Sent: Monday, June 27, 2005 3:48 PM To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> David:
> I don't see the 12V going too many places, but of course the 5V is all
> over the place.
> On the 5V reg q4160e is a coil L3101, this splits the "two" 5V
supplies
> and lifting one end might tell which path the current is following.
The
> SAMS says q4161 has a 29mA current flow, for what that is worth, but
> they don't tell us about the 5V paths.
>
> Wayne Vanaman
> Omega Electronics
> 6904 W Fairfield Dr
> Pensacola, Fl. 32506-3310
> Wayne@xxxxxxxxxxxxxxxxxxxxx
> WWW.PensacolaTVRepair.Com
> 850-456-5995 voice
> 850-458-6369 fax
>
> David Lessard wrote:
> Thanks for the information Wayne. I just noticed that Q4161 gets quite
> hot after just a minute, so I have a short somewhere off this
> transistor, now just to find it. I'll let you know what I find. I may
> have a few more questions before this is all over.
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
> K0C-1A0
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne Vanaman
> Sent: Monday, June 27, 2005 2:53 PM To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA 27" TV - CTC167CS - Dead After Storm
>
> Hi David:
> The on/off command comes from the micro, U3101p18. U3101 pins:
> 18 on/off
> 31-32 crystal
> 33 reset low
> 40 data
> 41 clock
> 42 5v
> The reset pin, 33, is feed by the 12v supply true zener cr3101 with
> r3116 2400 ohms to ground.
> The 12 V supply is sourced by transformer T4601, diodes cr4601-4.
Q4161c
> connects to cr4603/4 cathodes and is 22v. Q4161e is the 12V standby
> source, which also feeds q4160, the 5V standby reg. Q4160e being the
5v
> supply.
> It has been a long time since I have seen one of these, so this is
from
> memory. Looking down at the component side of the board with the tuner
> on your left. Towards the left hand side look for a diode that in
> standby has voltage on the anode but not on the cathode, if so, change
> it.
>
> Wayne Vanaman
> Omega Electronics
> 6904 W Fairfield Dr
> Pensacola, Fl. 32506-3310
> Wayne@xxxxxxxxxxxxxxxxxxxxx
> WWW.PensacolaTVRepair.Com
> 850-456-5995 voice
> 850-458-6369 fax
>
> David Lessard wrote:
> I stand corrected, I measure 11.7VDC at C605. Is this the proper
> voltage
> level? From there 11.7VDC goes over to Q161, off Q161-(E) voltage is
> 7.2VDC. From there the traces get too small for my weak eyes. Which
> pin
> at micro is Vcc? Which pin at micro is relay "ON"?
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
> K0C-1A0
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Monday, June 27, 2005 1:39 PM To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] RCA 27" TV - CTC167CS - Dead After Storm
>
> Gentlemen,
> I can not find my service manual for this older chassis, lent it out
> and
> it never came back. Does anyone have an e-copy they could send along?
> Standby PS is working, 16VDC is present at the bridge rectifier off
> secondary of standby transformer however relay doesn't activate when
> "ON" button is pressed. Where does secondary standby voltage go after
> this, regulator? I've only worked on (3) of these ever before, a
> troubleshooting guide and/or service manual would be greatly
> appreciated.
> Thanks in advance,
>
> David Lessard
> Mr_fixit@xxxxxxxxxxxx
> Alexandria, Ontario, Canada
> K0C-1A0
> ----------------------------------------------
> -----
>
>
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