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Digest for sci.electronics.repair@googlegroups.com - 3 updates in 2 topics
| ehsjr <ehsjr@verizon.net>: Feb 19 12:26PM -0500 On 2/18/2024 5:36 PM, Bob F wrote: > VDR4 Varistor Digikey #495-1433-ND > C26 22uF Cap Digikey #493-4803-1-ND > C27 10uF Cap Digikey #1189-1175-ND Great! Congratulations! |
| Tim R <timothy42bach@gmail.com>: Feb 20 05:17AM -0800 On Sunday, February 11, 2024 at 3:16:45 AM UTC-5, Bob F wrote: > PC board #EL1345526 > plastic case labeled 134847902 > Online search brings up 137007000NH as the assembly. Is there a point at which you give up and program an Arduino or similar? Just curious. My washer (1990 purchase) doesn't have any electronics and I've thought of doing that if the timer would ever fail - or maybe just a box full of toggle switches. |
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Digest for sci.electronics.repair@googlegroups.com - 4 updates in 3 topics
| Jacob Macheca <jacobmacheca411@gmail.com>: Feb 18 06:39PM -0800 So some of my VHS play perfectly fine on my VCR, but others have picture that repeatedly goes to static and cuts out, then comes back and does it all over again. And, it only rewinds when the tape is playing, not when it stopped. All the other functions work fine, I can't seem to figure out what the issue is |
| "ohg...@gmail.com" <ohger1s@gmail.com>: Feb 19 06:56AM -0800 On Sunday, February 18, 2024 at 9:40:01 PM UTC-5, Jacob Macheca wrote: > So some of my VHS play perfectly fine on my VCR, but others have picture that repeatedly goes to static and cuts out, then comes back and does it all over again. And, it only rewinds when the tape is playing, not when it stopped. All the other functions work fine, I can't seem to figure out what the issue is Most of those types of complaints were from playing back tapes that were recorded at different speeds and played back on a multi head VCR - 4 head VCRs would often use one pair of heads for two speeds and the other head for one speed - so a single weak or dirty head would affect playback on some tapes but not all. You can try cleaning the heads (look up how to do it - the head drum is machined chrome but the heads are tiny fragile things that spin in the track between the upper and lower head drum). A dirty upper or lower drum can also cause some stiction on some formulations of tape and not others or tapes with varying level of wear. Cleaning the sticky crud along the whole tape path including head drum, audio/control head, guides, brake follower, etc. will relieve stiction. Other issues that can cause glitchy playback include misalignment of the fixed control head, dirty control head, worn control head, or failing electrical components in the control circuitry or capstan drive circuitry. The rewind problem is mechanical. Depending on the exact transport you have, it probably uses a different drive for slack takeup during play and full rewind mode. Most likely the swing idler will need to be replaced/renewed at least. |
| Bob F <bobnospam@gmail.com>: Feb 18 02:36PM -0800 On 2/11/2024 12:16 AM, Bob F wrote: > PC board #EL1345526 > plastic case labeled 134847902 > Online search brings up 137007000NH as the assembly. I replaced the 2 caps and burned varistor with parts from Digikey. After re-assembly, it powered up perfectly, and is now doing the first load of laundry. VDR4 Varistor Digikey #495-1433-ND C26 22uF Cap Digikey #493-4803-1-ND C27 10uF Cap Digikey #1189-1175-ND |
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