[TechAssist] Re: Sharp 27" TV - CN27S18 - Turn ON then OFF
- From: "John at Main TV" <maintv2004@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 21 Jun 2004 10:00:01 -0600
According to Sams 4511 it should be a 32v part numberRH-EX0673GEZZ. I am
not sure if I know the exact purpose of that diode. John.
John Mielke
Main TV
636 main St.
Longmont, Co
phone 303 776 6955
fax 303 776 0792
maintv2004@xxxxxxxxxxx
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, June 20, 2004 7:19 AM
Subject: [TechAssist] Re: Sharp 27" TV - CN27S18 - Turn ON then OFF
> I need the value of D713 near STRF6626 regulator. I believe it's 30V but
> I'm not sure. This zener is shorted. Could it be the cause of the
> problem described below? Does anyone have a print for this model?
>
> Thanks,
>
> David Lessard
> mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Friday, June 18, 2004 2:09 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Sharp 27" TV - CN27S18 - Turn ON then OFF
>
> I should elaborate on this problem. There seems to be no +B from the
> switching regulator. I do hear the relay activate and I can trace AC to
> the regulator circuitry but that's it. Standby voltages are obviously
> working because the micro is responding to panel buttons and the remote
> causing the relay to activate. I imagine the micro is also monitoring
> the +B or some secondary FBT voltage, if it's not present the micro
> turns off the relay. Question is, does the SMPS in this chassis fire up
> when the relay activates or is it always on like in the RCA chassis's?
> Are those STR=F6626 regulators a common failure?
>
> Thanks again,
>
> David Lessard
> mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Friday, June 18, 2004 1:25 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Sharp 27" TV - CN27S18 - Turn ON then OFF
>
> When I press the "ON" button I hear the relay "click" ON then two
> seconds later it "clicks" OFF. Protection? What are the common (if any)
> causes for this problem? HOT is good, standby voltage is good, what else
> should I look at? No schematic here.
>
>
> Thanks in advance.
>
>
>
> David Lessard
>
> Alexandria Electronics
>
> 50 Harrison Street
>
> P.O. Box 1366
>
> Alexandria, Ontario.
>
> Canada
>
> K0C-1A0
>
> mr_fixit@xxxxxxxxxxxx
>
>
>
>
>
>
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