Hello Yoji,<div><br></div><div>It sounds like my "magic touch" made it to your Dektak!! Something to consider is if the system was powered off for a while, the issue could have been temperature related, just a few hz difference in monitor sync and camera sync. It is recommended that the Dektak power remain on; you can lower the image brightness of the monitor and turn the sample illuminator off with the brightness knob. Calibration will be off slightly as well until temperature stabilizes, ~ 1-2 hours. </div><div><br></div><div>Feel free to contact me directly any time; I worked at Sloan Technology when this product was developed. I suppose I know them better than most. </div><div><br></div><div>Best regards,</div><div><br></div><div>Dennis Culver</div><div>Culver Consulting</div><div>C/O Recycled Goods</div><div>3820 N. Ventura Ave. </div><div>Ventura, CA 93001. USA</div><div>BIZ (805) 648-1184<br><br><div id="ymail_android_signature"><a id="ymail_android_signature_link" href="https://aolapp.onelink.me/eG2g?pid=NativePlacement&c=US_Acquisition_YMktg_320_EmailSignature_AttributionDL&af_sub1=Acquisition&af_sub2=US_YMktg&af_sub3=&af_sub4=100002473&af_sub5=SentFromNewAOLApp__Interstitial_&af_ios_store_cpp=ce85ce34-ad0f-4811-a92b-a172743b064e&af_android_url=https://play.google.com/store/apps/details?id=com.aol.mobile.aolapp&listing=email_signature_attribution">Sent from AOL on Android</a></div> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> <div id="yiv0108593816"><style><!--
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--></style><div><div class="yiv0108593816WordSection1"><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">Dear Dennis,</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">Thank you very much for your detailed and helpful advice.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">Interestingly, when I powered on the Dektak 3030ST today, it was working normally — the display was stable and there was no horizontal scrolling.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">As a reference, I measured the waveforms at U22 pin 1 and J-6 pin 3 using an oscilloscope, and both showed clean, stable sync signals as expected.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">I am not sure why it has recovered, but I will keep your troubleshooting advice in mind. If the issue occurs again, I will follow your instructions step by step to isolate the problem.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">If you don't mind, I would like to contact you again should any further issues arise with the Dektak. Your expertise has been invaluable to us, and we feel very reassured knowing we can rely on your support.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">Thank you again for taking the time to provide such thorough guidance. We truly appreciate your support.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">Best regards,</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">Yoji Yasuda</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;">***************************************************<br clear="none"></span><span style="font-size:11.0pt;">東京工芸大学 工学部工学科 電気電子コース<span lang="EN-US"><br clear="none"></span>准教授 安田 洋司<span lang="EN-US"><br clear="none"></span>〒<span lang="EN-US">243-0297</span> 神奈川県厚木市飯山南<span lang="EN-US">5-45-1<br clear="none">10</span>号館<span lang="EN-US">4</span>階薄膜デバイス研究室<span lang="EN-US">(</span><span style="color:red;">引っ越しました</span><span lang="EN-US">)<br clear="none"></span>電話<span lang="EN-US">/FAX</span>：<span lang="EN-US">046-242-9560<br clear="none">e-mail</span>：<span lang="EN-US"> <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:yyasuda@em.t-kougei.ac.jp" target="_blank" href="mailto:yyasuda@em.t-kougei.ac.jp"><span style="color:#1155CC;">yyasuda@t-kougei.ac.jp</span></a></span></span><span lang="EN-US" style=""></span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:11.0pt;"> </span></p><div id="yiv0108593816yqt84122" class="yiv0108593816yqt6394169129"><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0mm 0mm 0mm;"><p class="yiv0108593816MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:sans-serif;">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:sans-serif;"> Dennis Culver <djculver@aol.com> <br clear="none"><b>Sent:</b> Friday, August 21, 2026 3:59 AM<br clear="none"><b>To:</b> yyasuda@t-kougei.ac.jp; labnetwork@mtl.mit.edu<br clear="none"><b>Subject:</b> Re: [labnetwork] Dektak 3030ST: CRT Horizontal Sync Issue ? Seeking Advice and Service Manual</span></p></div><p class="yiv0108593816MsoNormal"><span lang="EN-US"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> Dear Yoji,</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">Hopefully, I can help you isolate this issue. </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">In video # 1, (mixed video), the Dektak 3030ST sign-on screen is not scrolling, it is synced. Cycle the video</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">key to video only. If the image is stable, not scrolling, then the monitor is receiving sync. If you cycle to</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">camera only, if it is rolling, either the sync signal for the camera is missing or the camera is defective.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">If you unplug the BNC connector for the camera video, and the scrolling stops when you cycle through the</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">screen options, (video only, camera only, mixed), then we can deduce that the sync signal to the camera</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">may be absent or the camera is bad.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">The Dektak video circuit is a modified NTSC; black & white horizontal sync is 15.750 khz. The Dektaks need</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">external sync as the horizontal sync rate is 15.735 khz, same rate as the color horizontal sync rate(?) You</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">will notice that both camera vertical (60.00hz) and horizontal sync are generated on the SHI PC card, schematic</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">attached, from U17, connected to the camera cable through connector J-6 pin 3 for horizontal. You will</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">notice that the raw H sync signal comes from the MEU to U22 pin 1. The horizontal sync delay is to sync</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">the camera H sync to the monitor, to prevent horizontal scrolling of either image.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">You can troubleshoot the sync signals using an oscilloscope. TP-5 is ground and the signal can be viewed</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">at connector J-6 pin 3 brown Methode style connector. You will also notice the camera "auto iris" signal at J-6</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">pin 6. This signal is "white data" from the camera to servo lamp brightness when you zoom in/out or to</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">adjust the lamp to the sample. If the horizontal sync signal is present at J-6 pin 3, suspect the camera </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">external sync input defective. If the signal is absent, follow the signal back. If there's no H sync signal at</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">U22 pin 1, there's an issue on the CPU board in the MEU. (I'll try and locate the appropriate section of that CPU </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">board for you). With only the power connector on the camera connected, you can plug the camera cable</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">into a composite monitor (75 ohm) and view the camera image as the camera will default to 15.750 khz, </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">internally generated. The lamp brightness should work normally using the brightness knob on the front of </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">the scan head. The Javelin cameras do fail in this manner. Sadly, you can only replace the camera with the </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">EXACT same model. </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">Hopefully, this will help you get your Dektak back up and running!</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">Best Regards, </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">Dennis Culver</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">Culver Consulting</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">3820 N. Ventura Ave.</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;">Ventura, CA 93001 USA</span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-family:sans-serif;"> </span></p><p class="yiv0108593816MsoNormal"><span lang="EN-US" style="font-size:10.0pt;color:#26282A;">On Thursday, August 20, 2026 at 12:38:18 AM PDT, <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:yyasuda@t-kougei.ac.jp" target="_blank" href="mailto:yyasuda@t-kougei.ac.jp">yyasuda@t-kougei.ac.jp</a> <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:yyasuda@t-kougei.ac.jp" target="_blank" href="mailto:yyasuda@t-kougei.ac.jp">yyasuda@t-kougei.ac.jp</a>> wrote:</span><span lang="EN-US"></span></p><blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0mm 0mm 0mm 6.0pt;margin-left:6.0pt;margin-top:6.0pt;margin-right:0mm;"><p class="yiv0108593816MsoNormal"><span lang="EN-US"> </span></p><div id="yiv0108593816"><p class="yiv0108593816msonormal"><span lang="EN-US">Dear LabNetwork members,</span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p><p class="yiv0108593816msonormal"><span lang="EN-US">I am a researcher at a university in Japan working in a thin film laboratory. I am currently experiencing a serious display issue with our Dektak 3030ST and would greatly appreciate any advice from members who have experience with this system.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p><p class="yiv0108593816msonormal"><span lang="EN-US">--- Current Symptoms ---</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">1. The CRT screen image continuously scrolls horizontally and cannot be stabilized.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">2. White and black screens appear alternately. see attached files.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">3. A horizontal band appears from the top of the screen and drifts continuously to the left.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">4. When the EXT SYNC cable is disconnected, the camera lamp remains on continuously and the camera image is displayed normally. However, the horizontal scrolling on the CRT persists.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p><p class="yiv0108593816msonormal"><span lang="EN-US">Based on symptom 4, we believe the camera itself is functioning normally. We suspect the issue is related to the H-SYNC signal circuit on the CRT board, possibly caused by accidental adjustment of the H-HOLD or horizontal frequency trimmer.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p><p class="yiv0108593816msonormal"><span lang="EN-US">--- What We Are Looking For ---</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">1. Has anyone experienced a similar issue with the Dektak 3030ST and been able to resolve it?</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">2. Does anyone have access to the service manual or circuit diagram for the Dektak 3030ST, particularly the CRT display and horizontal sync adjustment section?</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">3. Any guidance on which trimmer controls H-HOLD vs H-POSITION on this unit would be extremely helpful.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p><p class="yiv0108593816msonormal"><span lang="EN-US">Thank you very much for any help you can provide.</span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p><p class="yiv0108593816msonormal"><span lang="EN-US">Best regards,</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">Yoji Yasuda</span></p><p class="yiv0108593816msonormal"><span lang="EN-US">Tokyo Polytechnic University<br clear="none">e-mail</span>：<span lang="EN-US"> <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:yyasuda@em.t-kougei.ac.jp" target="_blank" href="mailto:yyasuda@em.t-kougei.ac.jp"><span style="color:#1155CC;">yyasuda@t-kougei.ac.jp</span></a></span></p><p class="yiv0108593816msonormal"><span lang="EN-US"> </span></p></div><p class="yiv0108593816MsoNormal"><span lang="EN-US">_______________________________________________<br clear="none">labnetwork mailing list<br clear="none"><a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:labnetwork@mtl.mit.edu" target="_blank" href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a><br clear="none"><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork">https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a></span></p></blockquote></div></div></div></div> </div> </blockquote></div>