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Stasis 3 - one channel burned
Stasis 3 - one channel burned
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Old 5th April 2018, 04:18 PM   #11
Nelson Pass is offline Nelson Pass  United States
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Stasis 3 - one channel burned
Quote:
Originally Posted by Dennis Hui View Post
OT: Presumably those Threshold schematics were hand drawn. They are absolutely beautiful.
Pre-computer age. George Cusick was our in-house draftsman.
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Old 5th April 2018, 04:37 PM   #12
nicoch58 is offline nicoch58  Europe
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File Type: jpg STASIS 2-3 SCHEM.jpg (505.1 KB, 172 views)
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Old 7th April 2018, 07:14 AM   #13
jimchc is offline jimchc
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Default Repair

Guy by name of Jon Soderberg can repair or update components for old stasis units. I think you could just Google him to check it out. He used to work for Threshold from what I understand. My Threshold Stasis 2 was bought new 38 years ago and has been in continuous use in my main system and still making me happy. If can get it up and running you will be happy. I built a Pass designed BA3 based system for my small room system and like that too
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Old 16th April 2018, 05:24 PM   #14
Klister2108 is offline Klister2108
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Finally I got a picture of the board. Could anyone based on these photos give any ideas as to the failure and suggestion for next steps. Many thanks in advance.
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File Type: jpg 30771756_10215868651214885_986747171_o.jpg (674.5 KB, 84 views)
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Old 16th April 2018, 05:28 PM   #15
Klister2108 is offline Klister2108
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New pics...any ideas?
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Old 16th April 2018, 05:58 PM   #16
Zen Mod is online now Zen Mod  Serbia
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Stasis 3 - one channel burned
-proper photoshoot session , to ensure easier assembly later
-check all outputs in situ with diode test ; if there is short somewhere , you need to disassemble complete group , to locate Dodo transistor (if that's the case , we are going to deal later)
-check one by one all resistors on output pcbs

-desolder all wires from pcb ;

-remove all burned resistors , clean pcb with alcohol, replace resistors

-check all resistors
-replace all electrolyts on both pcbs
-replace all Tantalum caps , either with electrolyts or solid caps
- desolder one by one all semiconductors on pcb , check , replace if Dodo

solder wires again , mount back , prepare Bulb tester
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Last edited by Zen Mod; 16th April 2018 at 06:01 PM.
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Old 20th August 2018, 09:25 AM   #17
bagi is offline bagi
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Common fault in this board is the small tantalum cap placed in the solder face of pcb.
It shorts on power up.
Also you have to consider that the electrolyts used in this board marks the positive with an arrow.
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