{"id":2627,"date":"2018-02-14T15:00:26","date_gmt":"2018-02-14T20:00:26","guid":{"rendered":"http:\/\/pugix.com\/synth\/?p=2627"},"modified":"2018-02-14T15:00:26","modified_gmt":"2018-02-14T20:00:26","slug":"wmd-pro-output-repair","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/wmd-pro-output-repair\/","title":{"rendered":"WMD Pro Output Repair"},"content":{"rendered":"

\"\"<\/a>I noticed that the nuts on the 1\/4 inch TRS output jacks of my WMD Pro Output module were loose.\u00a0 These get a lot of use, so I wanted to snug them up.\u00a0 I am always careful not to over tighten nuts.\u00a0 I used a 1\/2 inch socket wrench and applied minimal torque.\u00a0 The top one went fine, but when tightening the bottom one, it sheared off.<\/p>\n

\"\"<\/a>

Side view<\/p><\/div>\n

\"\"<\/a>

Shear point<\/p><\/div>\n

I was surprised, because of the reputation of WMD for high quality components.\u00a0 Notice in the side profile photo how these jacks have special lugs for PC board mounting.\u00a0 The are standard sized TRS jacks and I happened to have some Switchcraft 112BX jacks on had.\u00a0 The 112BX are similar to these jacks, except that they have solder lugs for panel mounting.\u00a0 Whatever metal that was used for the barrel was very weak and could not stand any torquing down.<\/p>\n

The Repair Job<\/h3>\n

I removed the front panel and disassembled the module.<\/p>\n

To remove the three old jacks I first cut the pins going to the board.\u00a0 I then removed the remains of the pins by heating and picking them out.\u00a0 Finally, a solder sucker cleaned out the holes.\u00a0 Now I had to figure a way to adapt the 112BX lugs to fit the board.\u00a0 To do that I cut down their lugs to preserve the clearance between the panel and the board.\u00a0 I soldered bus wire to each of the lugs.\u00a0 Then I mounted the three jacks into the panel, tightening them snugly.<\/p>\n

\"\"<\/a>

New jacks<\/p><\/div>\n

\"\"<\/a>

In the panel<\/p><\/div>\n

Then I reassembled the whole thing and soldered the wires.\u00a0 There is a little skewing of the angle of the board, due to the wires not fitting perfectly.\u00a0 I did not want to put bending forces on the board.<\/p>\n

\"\"<\/a>

Final assembly<\/p><\/div>\n

 <\/p>\n

The module is again working, although I discovered a bit of intermittence on the right output.\u00a0 Investigating that seemed to indicate it happened when the board was flexed, but the problem resolved itself.\u00a0 Ironically, while doing this repair I realized that I probably do not need this module.\u00a0 I can take outputs directly from the L-1 Stereo Output Mixer, either from its left and right outputs or from its headphone jack.\u00a0 Those are unbalanced, but my cables are eight feet or shorter to the mixer.\u00a0 Thus, I am considering removing the WMD Pro Output from the box to make room for 6 hp more of modules.<\/p>\n","protected":false},"excerpt":{"rendered":"

I noticed that the nuts on the 1\/4 inch TRS output jacks of my WMD Pro Output module were loose.\u00a0 These get a lot of use, so I wanted to … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":2632,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[161,14],"tags":[],"class_list":["post-2627","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eurorack","category-projects"],"yoast_head":"\nWMD Pro Output Repair - Richard Brewster's Electronic Sounds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pugix.com\/synth\/wmd-pro-output-repair\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"WMD Pro Output Repair - Richard Brewster's Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"I noticed that the nuts on the 1\/4 inch TRS output jacks of my WMD Pro Output module were loose.\u00a0 These get a lot of use, so I wanted to ... 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