Repairing: Difference between revisions
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[[File:NiCd VARTA battery leakage on circuit board (IMG 3313).jpg|thumb|right|250px|A NiCd battery that has leaked in a Korg Poly-61, corroding traces and IC legs.]] |
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[[File:Gebrochene loetstellen.jpg|thumb|right|250px|Two broken solder joints (left) and a delaminated PCB trace (right).]] |
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[[File:Elko-mit-ausgedrücktem-Gummistopfen.jpg|thumb|right|250px|Failed electrolytic capacitors with swollen can tops and expelled rubber seals.]] |
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'''Repairing''' electronic music gear includes [[Electronic circuit fault finding|troubleshooting]] problems, replacing worn or damaged parts (both mechanical and electronic), repairing electrical connections, and performing preventive maintenance.<!--<ref>cite some source source</ref>--> |
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[[File:Prophet 5 rev 2 missing a power transformer.jpg|thumb|center|400px|[[Sequential Circuits Prophet-5|Prophet 5 rev. 2]] missing a power transformer.]] |
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== Essentials of electronics repair == |
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; Be Careful |
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: Avoid causing more damage. |
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: Be organised and take your time. |
|||
; Start simple |
|||
: Check easy-to-fix issues first. |
|||
; External checks |
|||
: Gather information on symptoms. |
|||
: Check cables, [[power supply|power supplies]] and fuses. |
|||
: Look for signs of physical damage. |
|||
; Cleaning |
|||
: Brush and vacuum the device with [[ESD protection|ESD-safe methods]]. |
|||
: Remove contaminants e.g. from spilled drinks |
|||
; Opening the device |
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: Unplug gear before opening. |
|||
: Use soft surfaces to avoid scratches, ensure any separated but still connected parts are well supported. |
|||
: Find the service manual (these can have errors)<ref>[https://www.modwiggler.com/forum/viewtopic.php?p=3361863#p3361863 Re: Duplicating old PCBs... strategies? tips?], Mod Wiggler Forum, 6 Oct 2020</ref> or watch disassembly videos. |
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: Use containers to keep screws and other fastenings from getting lost. |
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: Take note of where any parts will go when reassembling. |
|||
: Take detailed photos of the internal setup, you may need to refer to these later. |
|||
; Initial observations |
|||
: Check for battery leakage, physical deformities, and blown fuses, (look for the cause of any blown fuse). |
|||
: Look for signs of overheating or smoke. |
|||
: Connections between dissimilar metals can corrode or degrade over time. |
|||
; Fixing process |
|||
: Re-seating connectors can solve many issues. Be very careful not to bend any pins. |
|||
: Check for corrosion and clean with contact cleaner. |
|||
: Avoid fully removing socketed ICs fully; raise the IC slightly and push down again to clean the contacts. |
|||
: Clean or replace scratchy pots. |
|||
: Check solder joints and touch up if needed, (with matching solder type). Be careful not to damage any nearby wires plastic parts with the iron. |
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; Common issues |
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: Many problems are mechanical rather than electronic. |
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: In industry when fixing is too time consuming a board is swapped rather than repairing the components.<ref>''[https://www.harmonycentral.com/articles/keyboards-and-pianos/how-to-fix-electronic-music-gear-r766/ How to fix electronic music gear]'' by by Craig Anderton, Harmony Central, 13 Feb 2017</ref> |
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== Showcase == |
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Practical, real-world examples to guide and inspire. |
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* [[Roland Alpha Juno 2]] |
* [[Roland Alpha Juno 2]] |
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== See also == |
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=== Methods === |
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* [[Electronic circuit fault finding]] |
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* [[Desoldering]] |
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* [[Recapping]] |
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* [[Replacing components]] |
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* [[SMT reflow soldering]] |
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* [[PCB repair]] |
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== References == |
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{{reflist}} |
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== Further reading == |
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* ''How to diagnose and fix everything electronic'' by Michael Jay Geier, McGraw Hill TAB, 2015, {{ISBN|9780071848305}} |
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* ''Troubleshooting and Repairing Electronic Music Synthesizers'' by Delton T. Horn, TAB, 1992, {{ISBN|9780830639212}}, ([[Synth_DIY_books#Troubleshooting_and_Repairing_Electronic_Music_Synthesizers_by_Delton_T._Horn|not recommended]]) |
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* ''[https://archive.org/details/Sequential_Circuits_Prophet_5_Service_Manual Prophet 5 technical manual]'' by Sequential Circuits |
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== External links == |
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* [https://synfo.nl/ Synfo.nl], Synth service manuals, synth IC data sheets and links to synth technicians. |
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* [http://www.pinrepair.com/begin/index.htm Beginning pinball repair and circuit board repair], includes useful information. |
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* [http://weltenschule.de/TableHooters/WarrantyVoidFAQ.htm WarrantyVoid FAQ - keyboard & sound toy modification, circuit-bending], includes useful information. |
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* [https://djjondent.blogspot.com/2020/04/the-ship-of-thesus.html The Ship of Thesus], on whether to repair or to preserve vintage synths, Jon Dent blog, 1 Apr 2020 |
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* [https://reverb.com/uk/news/the-most-common-maintenance-issues-of-22-classic-synths-and-how-to-fix-them The Most Common Maintenance Issues of 22 Classic Synths (and How to Fix Them)], by Travis Thatcher, Reverb, Sep 2017 |
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=== Forums === |
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* [https://www.reddit.com/r/SynthRepairs/ r/SynthRepairs] |
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* [https://forums.syntaur.com/c/synth-repair/5 Synth Repair], Syntaur Forums |
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* [https://www.eevblog.com/forum/repair/ Repair], EEVblog Electronics Community Forum |
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* [https://www.facebook.com/groups/vintagesynthrepair Vintage Synth Repair And Mods.], Facebook group |
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=== YouTube === |
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About the general principles. For repairs to a specific piece of equipment, see its page.<!-- List from [https://synth-diy.org/pipermail/synth-diy/2020-October/thread.html favorite Youtube genre - "old guys repairing electronics"], Synth-DIY email list, Oct, Nov 2020 --> |
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* [https://www.youtube.com/@Synthchaser Synthchaser] |
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* [https://www.youtube.com/playlist?list=PLF1UA_znYwS4pg41KbOaSwRqAroe0AM20 Musical Instrument teardowns and repairs] by markusfuller |
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* [https://www.youtube.com/@Syntaur/search?query=repair Syntaur] |
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* [https://www.youtube.com/@DiyguitarpedalsAu/search?query=repair DIY Guitar Pedals] |
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* [https://www.youtube.com/@MrCarlsonsLab/search?query=repair Mr. Carlson’s Lab] |
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* [https://www.youtube.com/@mikeselectricstuff/search?query=repair mikeselectricstuff] |
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* [https://www.youtube.com/@Thesignalpath/search?query=repair The Signal Path] |
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* [https://www.youtube.com/@jeriellsworth/search?query=repair Jeri Ellsworth] |
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* [https://www.youtube.com/@FranLab/search?query=repair Fran Blanche] |
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* [https://www.youtube.com/@channelengineer/search?query=repair channelengineer] |
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* [https://www.youtube.com/@ElektronikLabor/search?query=Reparatur ElektronikLabor] |
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* [https://www.youtube.com/@mjlorton/search?query=repair mjlorton] |
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* [https://www.youtube.com/@SalaScience/search?query=repair Sala Science] |
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* [https://www.youtube.com/@LearnElectronicsRepair/featured Learn Electronics Repair] |
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* [https://www.youtube.com/@UncleDoug/search?query=repair Uncle Doug] |
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* [https://www.youtube.com/@CuriousMarc/search?query=repair CuriousMarc] |
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* [https://www.youtube.com/@reps/search?query=repair Marco Reps] |
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* [https://www.youtube.com/@JordanPier/search?query=repair Jordan Pier] |
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* [https://www.youtube.com/@Techmoan/search?query=repair Techmoan] |
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* [https://www.youtube.com/@bigclivedotcom/search?query=repair bigclivedotcom] |
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* [https://www.youtube.com/@EEVblog/search?query=repair EEVblog] |
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* [https://www.youtube.com/@DextersTechLab/search?query=repair DextersTechLab] |
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[[Category:Repairing]] |
Revision as of 22:01, 9 July 2024
![](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/NiCd_VARTA_battery_leakage_on_circuit_board_%28IMG_3313%29.jpg/250px-NiCd_VARTA_battery_leakage_on_circuit_board_%28IMG_3313%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/72/Gebrochene_loetstellen.jpg/250px-Gebrochene_loetstellen.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Elko-mit-ausgedr%C3%BCcktem-Gummistopfen.jpg/250px-Elko-mit-ausgedr%C3%BCcktem-Gummistopfen.jpg)
Repairing electronic music gear includes troubleshooting problems, replacing worn or damaged parts (both mechanical and electronic), repairing electrical connections, and performing preventive maintenance.
![](http://static.miraheze.org/sdiywikiwiki/thumb/9/94/Prophet_5_rev_2_missing_a_power_transformer.jpg/400px-Prophet_5_rev_2_missing_a_power_transformer.jpg)
Essentials of electronics repair
- Be Careful
- Avoid causing more damage.
- Be organised and take your time.
- Start simple
- Check easy-to-fix issues first.
- External checks
- Gather information on symptoms.
- Check cables, power supplies and fuses.
- Look for signs of physical damage.
- Cleaning
- Brush and vacuum the device with ESD-safe methods.
- Remove contaminants e.g. from spilled drinks
- Opening the device
- Unplug gear before opening.
- Use soft surfaces to avoid scratches, ensure any separated but still connected parts are well supported.
- Find the service manual (these can have errors)[1] or watch disassembly videos.
- Use containers to keep screws and other fastenings from getting lost.
- Take note of where any parts will go when reassembling.
- Take detailed photos of the internal setup, you may need to refer to these later.
- Initial observations
- Check for battery leakage, physical deformities, and blown fuses, (look for the cause of any blown fuse).
- Look for signs of overheating or smoke.
- Connections between dissimilar metals can corrode or degrade over time.
- Fixing process
- Re-seating connectors can solve many issues. Be very careful not to bend any pins.
- Check for corrosion and clean with contact cleaner.
- Avoid fully removing socketed ICs fully; raise the IC slightly and push down again to clean the contacts.
- Clean or replace scratchy pots.
- Check solder joints and touch up if needed, (with matching solder type). Be careful not to damage any nearby wires plastic parts with the iron.
- Common issues
- Many problems are mechanical rather than electronic.
- In industry when fixing is too time consuming a board is swapped rather than repairing the components.[2]
Showcase
Practical, real-world examples to guide and inspire.
See also
Methods
- Electronic circuit fault finding
- Desoldering
- Recapping
- Replacing components
- SMT reflow soldering
- PCB repair
References
- ^ Re: Duplicating old PCBs... strategies? tips?, Mod Wiggler Forum, 6 Oct 2020
- ^ How to fix electronic music gear by by Craig Anderton, Harmony Central, 13 Feb 2017
Further reading
- How to diagnose and fix everything electronic by Michael Jay Geier, McGraw Hill TAB, 2015, ISBN 9780071848305
- Troubleshooting and Repairing Electronic Music Synthesizers by Delton T. Horn, TAB, 1992, ISBN 9780830639212, (not recommended)
- Prophet 5 technical manual by Sequential Circuits
External links
- Synfo.nl, Synth service manuals, synth IC data sheets and links to synth technicians.
- Beginning pinball repair and circuit board repair, includes useful information.
- WarrantyVoid FAQ - keyboard & sound toy modification, circuit-bending, includes useful information.
- The Ship of Thesus, on whether to repair or to preserve vintage synths, Jon Dent blog, 1 Apr 2020
- The Most Common Maintenance Issues of 22 Classic Synths (and How to Fix Them), by Travis Thatcher, Reverb, Sep 2017
Forums
- r/SynthRepairs
- Synth Repair, Syntaur Forums
- Repair, EEVblog Electronics Community Forum
- Vintage Synth Repair And Mods., Facebook group
YouTube
About the general principles. For repairs to a specific piece of equipment, see its page.
- Synthchaser
- Musical Instrument teardowns and repairs by markusfuller
- Syntaur
- DIY Guitar Pedals
- Mr. Carlson’s Lab
- mikeselectricstuff
- The Signal Path
- Jeri Ellsworth
- Fran Blanche
- channelengineer
- ElektronikLabor
- mjlorton
- Sala Science
- Learn Electronics Repair
- Uncle Doug
- CuriousMarc
- Marco Reps
- Jordan Pier
- Techmoan
- bigclivedotcom
- EEVblog
- DextersTechLab