[TechAssist] Re: Symphonic SC313 Combo Service Manual need explanation ?
- From: "John at Main TV" <maintv2004@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 8 Sep 2004 14:30:20 -0600
SC313C manual should be the correct manual. The transformer should have
pins numbered 1 thru 16 (there is no pin 3), the secondary pins are 11 thru
16 with negative of scope (ground) to 12 and positive to 16. That is a
strange connection since 12 is not ground but then the waveform is strange
also. Are you saying your set does not have 15 pins on the transformer?
What is the problem with the set, does it work but makes a squeal from the
power supply? John.
John Mielke
Main TV
636 main St.
Longmont, Co
phone 303 776 6955
fax 303 776 0792
maintv2004@xxxxxxxxxxx
----- Original Message -----
From: "Randy Evans" <tvsvc2000@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 08, 2004 10:45 AM
Subject: [TechAssist] Symphonic SC313 Combo Service Manual need explanation
?
> In the Power Supply Troubleshooting sections of their Service Manuals,
they tell you to connect your Scope Probes to two terminals of T601, the
Switching Transformer. In almost every Service Manual, they tell you to
connect it to "Pins that don't even exist" on the transformer.
> What I need to know is: What Winding are the talking about?
> Positive Probe to ?? Negative Probe to ??
>
> I Copied and Pasted an example from a Symphonic SC313 manual below,
> although it is in their other combo Service Manuals as well.
>
> Thanks,
> Randy J. Evans
> VCR SERVICE
> Delta, Ohio 43515
> tvsvc2000@xxxxxxxxx
>
>
> 13" COLOR TV/VCR COMBINATION
>
> SC313C 6313CC EWC1302
>
> Page 1-8-15
>
> Power Supply Trouble Shooting Guide
> ---------------------------------------
> The transformer of the power
> supply makes a higher sound
> or the oscillation wave form is
> abnormal.
> (E.g. intermittent oscillation)
> Connect the positive probe of
> oscilloscope to the pin 16 of
> T601, then connect the negative
> probe to the pin 12. Observe the
> waveform and check to see if
> the waveform is out of limit of
> value shown in Fig.1.
> ---------------------------
>
> Voltage approx. 5Vp-p
>
>
>
> ---------------------------------
> Do you Yahoo!?
> New and Improved Yahoo! Mail - Send 10MB messages!
>
>
> --------------------------------------------------------------------------
---
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
