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8th December 2009
| #1 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Otari mx70 tape functions... After threading some tape last night my tape functions where acting strange....the machine would do the first comand, but would not do anything else, stop or ff or rw etc...the remote was acting the same... I am going to be hauling it in to my service station here shortly...any advice on where to begin???thanks in advance... Later chrisg. |
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8th December 2009
| #2 |
| Gear interested  Join Date: Dec 2009 Location: Detroit
Posts: 9
| Hi: Once you engage the transport and it gets "stuck" in the next operation, begin pulling audio cards until the transport then changes it's function. That's your bad card. Put IC 29 & IC 30 in sockets and replace the chips with new (they're like $0.85 each) and try it again. It's usually one of those chips. Good luck...Derrick. |
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10th December 2009
| #3 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | DerrickH. Thanks for the information I just forwarded it to my tech. Happy Holidays. chrisg. |
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10th December 2009
| #4 |
| Lives for gear  Join Date: May 2005 Location: Oklahoma City
Posts: 1,783
| Be sure that none of the pushbuttons have failed in the "down" position....IOW, that particular bad switch is "permanently pressed" due to a mechanical failure. Bri |
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11th December 2009
| #5 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Hey Brian, Thanks for the tip.... Another question...Does anyone have a pdf file of the schematic? On line? Or that I can purchase? thanks again chrisg. |
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11th December 2009
| #6 |
| Lives for gear Join Date: May 2005 Location: Oklahoma City
Posts: 1,783
| I see that Goreski has the audio card schematic posted: Free Otari Schematics and Manuals - from AnalogRules.com and AudioSchematics.com You might drop him a note to see if he has any more of the manual scanned. Bri |
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11th December 2009
| #7 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Thx again Brian Just sent an email off... later chris |
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11th December 2009
| #8 |
| Gear interested Join Date: Dec 2009 Location: Detroit
Posts: 9
| Chris: If you get stuck, I can scan a schematic for you. I have the entire manual. Also, I may be parting out my MX70 anyway, as I just purchased an MX-80-32 track, if anyone is interested. Derrick. |
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11th December 2009
| #9 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Derrick. I appreciate the help ...I just heard back from Goreski and he said he would scan and send it to me for 125$. I have the users manual but no schematics...I do need it at my techs shop to service the machine...I think I am going to just pay the 125. It will save time in the end... later chrisg. |
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11th December 2009
| #10 |
| Gear interested Join Date: Dec 2009 Location: Detroit
Posts: 9
| Sure. Anytime. You will need the schematics. That machine can be a PITA! |
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11th December 2009
| #11 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | YES...PITA...for my tech...and a PITW(pain in the wallet)for me..I found a guy in LA selling a 1" 8 version and he may have the schematics....I am going to LA tomorrow so it may work out well... thx chris |
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18th December 2009
| #12 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Update..... Machines back in action as of two nights ago.... Problem #1 was channel 1 was stuck in repro mode...IC 29/30 replaced...problem fixed problem #2 a cable going to the solenoid broke or came undone...causing the transport to only take on the first command and no others.....stuck in that mode... thx everyone for the help... Happy holidays chrisg. |
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18th December 2009
| #13 |
| Gear interested Join Date: Dec 2009 Location: Detroit
Posts: 9
| Chris: Thanks for the update on the resolve. The cable to the solenoid is something new to me. Derrick. |
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18th December 2009
| #14 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Derrick.... A big thanks to you brian and goreski, he took a saturday and photocopied the whole manual for me and sent it to my tech overnight...they got it monday...I picked it up tuesday.....we moved the band to the tascam 8 track for the week and they wrote two new tunes in the studio....so now we redo them on the 16 and add them to the record and see if they make the cut....fun fun fun.... later chrisg. |
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18th December 2009
| #15 |
| Gear maniac Join Date: Feb 2008 Location: SAN DIEGO
Posts: 232
Thread Starter | Back in biz...  |
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