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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>The display is buried amongst several layers of things on the control panel.<o:p></o:p></p><p class=MsoNormal>I am hesitant to try to separate the layers.<o:p></o:p></p><p class=MsoNormal>There appears to be no impact to the operation of the oven.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>---> Paul<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Shane Trent <shanedtrent@gmail.com> <br><b>Sent:</b> Saturday, January 15, 2022 5:59 PM<br><b>To:</b> Paul MacDougal <paulmacd@acm.org><br><b>Cc:</b> TriEmbed Discussion <triembed@triembed.org><br><b>Subject:</b> Re: [TriEmbed] Substitute transistor<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Do you think the backlight going out would shut down the system? Do you know what voltage rail is used for the backlight?<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Sat, Jan 15, 2022 at 1:26 PM The MacDougals via TriEmbed <<a href="mailto:triembed@triembed.org">triembed@triembed.org</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The display blinked back on at full intensity for a short while yesterday!<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I believe it is the back light of the LCD that is the issue.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>---> Paul<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From:</b> TriEmbed <<a href="mailto:triembed-bounces@triembed.org" target="_blank">triembed-bounces@triembed.org</a>> <b>On Behalf Of </b>The MacDougals via TriEmbed<br><b>Sent:</b> Saturday, December 18, 2021 3:02 PM<br><b>To:</b> <a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a><br><b>Subject:</b> Re: [TriEmbed] Substitute transistor<o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I replaced the transistor with an exact match from ebay and a couple of electrolytic caps (at Carl’s suggestion).<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The display is still dim. Oh well.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>---> Paul<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From:</b> TriEmbed <<a href="mailto:triembed-bounces@triembed.org" target="_blank">triembed-bounces@triembed.org</a>> <b>On Behalf Of </b>The MacDougals via TriEmbed<br><b>Sent:</b> Friday, November 26, 2021 9:11 PM<br><b>To:</b> <a href="mailto:triembed@triembedorg" target="_blank">triembed@triembed.org</a><br><b>Subject:</b> [TriEmbed] Substitute transistor<o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>My microwave display suddenly went very dim. I opened it up and found a discolored</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>spot on a circuit board feeding the display (see attached image). That component is</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>marked B1238, so I assume it is a 2SB1238, which is obsolete.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'><a href="https://www.digikey.com/en/products/base-product/rohm-semiconductor/846/2SB1238/30307" target="_blank">https://www.digikey.com/en/products/base-product/rohm-semiconductor/846/2SB1238/30307</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>Medium power transistor( 80V, 0.7A) 2SB1189 / 2SB1238 Features 1) High breakdown voltage, BVCEO= 80V, and high current, IC= 0.7A.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>2) Complements the 2SD1767 / 2SD1859. Absolute maximum ratings (Ta=25C) Parameter Symbol Limits Collector-base voltage VCBO −80 Collector-emitter voltage VCEO −80 Emitter-base voltage VEB O −5 Collector current IC −0.7 C.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>Anyone want to help me find a replacement?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>I dug through my Dad’s stash of old electronics and found a TIP30B, which looks like it might work.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'>---> Paul</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:14.0pt'> </span><o:p></o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>Triangle, NC Embedded Interest Group mailing list<br><br>To post message: <a href="mailto:TriEmbed@triembed.org" target="_blank">TriEmbed@triembed.org</a><br>List info: <a href="http://mail.triembed.org/mailman/listinfo/triembed_triembed.org" target="_blank">http://mail.triembed.org/mailman/listinfo/triembed_triembed.org</a><br>TriEmbed web site: <a href="https://TriEmbed.org" target="_blank">https://TriEmbed.org</a><br>To unsubscribe, click link and send a blank message: mailto:<a href="mailto:unsubscribe-TriEmbed@bitser.net" target="_blank">unsubscribe-TriEmbed@bitser.net</a>?subject=unsubscribe<br>Searchable email archive available at <a href="https://www.mail-archive.com/triembed@triembed.org/" target="_blank">https://wwwmail-archive.com/triembed@triembed.org/</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 style='border-collapse:collapse'><tr><td style='padding:.75pt .75pt .75pt .75pt'><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 style='max-width:352.5pt'><tr><td style='padding:0in 0in 7.5pt 0in'><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=470 style='width:352.5pt'><tr><td width=10 valign=top style='width:7.5pt;padding:0in 7.5pt 0in 0in'><p class=MsoNormal><span style='border:solid windowtext 1.0pt;padding:0in'><img border=0 width=65 height=84 style='width:.677in;height:.875in' id="Picture_x0020_1" src="cid:~WRD0001.jpg" alt="Image removed by sender. photo"></span><o:p></o:p></p></td><td valign=top style='border:none;border-right:solid #45668E 1.0pt;padding:0in 0in 0in 0in'></td><td valign=top style='padding:0in 7.5pt 0in 7.5pt;text-align:initial'><div style='margin-bottom:3.75pt'><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#646464'>Shane D Trent</span></b><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#646464'><br>Patent Agent<o:p></o:p></span></p></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=470 style='width:352.5pt'><tr><td style='padding:0in 0in 0in 0in'><p style='margin:0in'><span style='font-size:9.0pt;font-family:"Calibri",sans-serif;color:#8D8D8D'><a href="tel:919-348-0061" target="_blank"><span style='font-family:"Arial",sans-serif;color:#8D8D8D;text-decoration:none'>919-348-0061</span></a></span><span style='font-size:9.0pt;font-family:"Calibri",sans-serif;color:#45668E'>|</span><span style='font-size:9.0pt;font-family:"Calibri",sans-serif;color:#8D8D8D'> <a href="mailto:shanedtrent@gmail.com" target="_blank"><span style='font-family:"Arial",sans-serif;color:#8D8D8D;text-decoration:none'>shanedtrent@gmail.com</span></a><o:p></o:p></span></p></td></tr><tr><td style='padding:0in 0in 0in 0in'><p style='margin:0in'><span style='font-size:9.0pt;font-family:"Calibri",sans-serif;color:#8D8D8D'><a href="http://ShaneTrent.com" target="_blank"><span style='font-family:"Arial",sans-serif;color:#8D8D8D;text-decoration:none'>ShaneTrent.com</span></a><o:p></o:p></span></p></td></tr><tr><td style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#8D8D8D'>Raleigh, North Carolina<o:p></o:p></span></p></td></tr></table><div style='margin-top:7.5pt'><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#646464;display:none'><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td style='padding:0in 4.5pt 0in 0in'><p class=MsoNormal align=center style='text-align:center'><a href="http://www.linkedin.com/in/shanetrent" target="_blank"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=16 height=16 style='width:.1666in;height:.1666in' id="Picture_x0020_2" src="cid:~WRD0001.jpg" alt="Image removed by sender."></span></a><o:p></o:p></p></td><td style='padding:0in 4.5pt 0in 0in'><p class=MsoNormal align=center style='text-align:center'><a href="https://twitter.com/sdtrent" target="_blank"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=16 height=16 style='width:.1666in;height:.1666in' id="Picture_x0020_3" src="cid:~WRD0001.jpg" alt="Image removed by sender."></span></a><o:p></o:p></p></td></tr></table></div></td></tr></table></td></tr></table><p class=MsoNormal><span style='display:none'><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 style='max-width:6.25in'><tr><td style='padding:0in 0in 0in 0in'></td></tr></table></td></tr></table><div style='border:none;border-top:solid #EEEEEE 1.0pt;padding:2.0pt 0in 0in 0in;margin-top:13.5pt;display:table;border-spacing:initial'><div><p class=MsoNormal><span style='font-size:7.5pt'><a href="https://www.wisestamp.com/create-own-signature/?utm_source=promotion&utm_medium=signature&utm_campaign=create_your_own&srcid=" target="_blank"><span style='color:black;text-decoration:none'>Create your own </span><span style='color:#A50310;text-decoration:none'>email signature</span></a><o:p></o:p></span></p></div></div><p class=MsoNormal><span style='border:solid windowtext 1.0pt;padding:0in'><img border=0 width=100 height=100 style='width:1.0416in;height:1.0416in' 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