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565ritfix [2012/11/17 10:41]
n1eu
565ritfix [2015/04/02 12:45] (current)
n1eu
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 ====== Orion RIT-XIT Intermittent Encoder Fix ====== ====== Orion RIT-XIT Intermittent Encoder Fix ======
-//(scroll down to bottom ​for latest/​best ​fix info - earlier info included for historical perspective)//​+//(scroll down to Aug 9, 2010 and later for the actual ​fix that works - earlier info included for historical perspective ​but the earlier suggested fixes do NOT hold up)//
  
 **From the Ten-Tec Reflector January 20, 2005** **From the Ten-Tec Reflector January 20, 2005**
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 I found that the pins from the logic board to the front panel sockets are indeed tin plated. Luckily the sockets are too (or not so luckily) but in that environment and with no wiping current, tin is not such a good thing. I found that the pins from the logic board to the front panel sockets are indeed tin plated. Luckily the sockets are too (or not so luckily) but in that environment and with no wiping current, tin is not such a good thing.
  
-I applied the grease (a little tedious but not too bad). I will document it and post it as soon as I see if it's consistent.+I applied the grease (a little tedious but not too bad). [N1EU note: see {{:​rit_cond_grease_fix.doc}} ]
  
 The grease seems to be about the same consistency as white clay with plenty of moisture (thicker than I imagined), but this is a good thing: it will stay put, just a little more difficult to work with. The grease seems to be about the same consistency as white clay with plenty of moisture (thicker than I imagined), but this is a good thing: it will stay put, just a little more difficult to work with.
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-**March 2012**+**January 2014 - N1EU**
  
-I had the "Step 3" ​mod installed and the RIT failed again after months. ​ I plan to go back in and do the Step 2 mod as well and see how it fares.  ​**Update** November 2012 - I never did the step 2 mod and I notice that my RIT is fully functional, so perhaps ​the previous Step 3 failure was just a glitch.+I had the Ten-Tec ​"step 3" ​repair above performed on my Orion but it failed again after several ​months. ​ I decided ​to try K4ZNO'​s above fix.  I applied ​the silver conductive grease to the encoder stake pin connector ​as well as the two vfo encoder connector pairs. ​ You need to remove the front panel and the logic board per the V2 mod instructions. ​ Remove the knobs on the 6 small encoders (see separate knob removal instructions). ​ Remove the screws securing the grounding wire/lugs to the vfo encoders and remove the cables/​connectors from the vfo encoders. ​ You then need to remove the 36 screws securing the front panel pcb in order to lift it up to gain access to remove the threaded nylon bushings securing the 6 encoders to the front panel pcb - use 1/2 in nut driver.  ​You can then lift up the encoder board. ​ I applied the grease with a tooth pick, carefully dabbing each pin.  Be very stingy with the grease because it will really spread and ooze out after you remake the connections and WILL cause short circuits in the future. ​ In fact, you should make/break the connection several times and then carefully clean off the oozed out grease. ​ When you reassemble everything, be very careful to not over-tighten the threaded nylon bushings on the 6 encoders or the push switch action will be impaired and control rotation will not be smooth.  ​would say the job start to finish can be performed in about an hour and there'​s nothing particularly difficult about it.  ​will report back in several months if the fix held(April 2015 - fix has held)
  
-Barry N1EU 
  

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