hello,
there is a lever with two positions lock/unlock on the hda,look on what
position it is
must be on unlock (but how could it set itself to lock position ?
it is a mecanism to stop the heads when transporting the hda,I think it is
only a manual
mechanism not automatic ).Maybe there is a problem on the microprocessor
module.

We have the ek-ora81-sv-001,would it help you?If yes send your address
by e-mail

regards
*************************************************************
Florence et Alain Nierveze
492 Allée Montesquieu
33290 Le Pian Medoc
FRANCE
************************************************************
E-mail : nierveze@radio-astronomie.com
Web  : www.radio-astronomie.com
-----Message d'origine-----
De : Gunther Schadow <gunther@aurora.regenstrief.org>
À : classiccmp@classiccmp.org <classiccmp@classiccmp.org>;
port-vax@netbsd.org <port-vax@netbsd.org>
Date : lundi 12 novembre 2001 03:40
Objet : RA81 problems, someone with a service manual can help?


>Hi,
>
>today I moved the RA81 from the garage down into the Laundry/Computer-
>Room in the basement. Thanks to my straps and a hydraulic car jack-
>stand I was actually able to install it in my TU81+ cabinet without
>breaking my back or getting squished underneath the drive :-). It
>looks really cool in the TU81 rack. I powered it up and though no
>lights at these push-buttons come on, I could test it quite far.
>Thanks to Will Kranz' abridged service manual
>
>http://www.conknet.com/~w_kranz/pdp11/RA81.HTM
>
>I knew what I could do with the terminal and that CTRL-C will
>get it going (not CTRL-Z like with the TU81+) and after running
>diagnostics once, I could actually spin up the drive. Just
>seeking seems not to work.
>
>Spun up diagnostigs gets the error
>
>terminal plugged in, 300 b/s, 8 bit, 1 stop no parity
>
>þ
>^C
>
>CTRL-C gets a prompt
>
>  RA81> EUR^C
>
>  RA81> EUR
>
>turn serial port to 7 bit instead of 8 removes the junk
>
>  RA81>
>
>  RA81> RUN DIAGNOSTICS
>
>%RA81-COMPLETED TEST:DIAG SUBTEST:02
>%RA81-COMPLETED TEST:DIAG SUBTEST:01
>%RA81-COMPLETED TEST:DIAG SUBTEST:07
>%RA81-COMPLETED TEST:DIAG SUBTEST:08
>%RA81-COMPLETED TEST:DIAG SUBTEST:0B
>%RA81-COMPLETED TEST:DIAG SUBTEST:03
>%RA81-COMPLETED TEST:DIAG SUBTEST:0D
>%RA81-COMPLETED TEST:DIAG SUBTEST:19
>%RA81-COMPLETED TEST:DIAG SUBTEST:1B
>%RA81-COMPLETED TEST:DIAG SUBTEST:1C
>%RA81-COMPLETED TEST:DIAG SUBTEST:1D
>%RA81-COMPLETED TEST:DIAG SUBTEST:1E
>%RA81-COMPLETED TEST:DIAG SUBTEST:1F
>%RA81-COMPLETED TEST:DIAG SUBTEST:20
>
>this was diagnostics spun down, everything successful! Now
>I push the RUN/STOP switch in and there comes the sound of
>the drive spinning up, really impressive!
>
>  RA81> FRONT PANEL FUNCTION IN PROGRESS
>
>then this message comes and a long time nothing, finally:
>
>%RA81-TEST: SUBTEST:1B  ERROR:50  UNIT:001
>%RA81-FRU-SLAVE RESPONSE FAIL- SERVO,MICRO
>
>not knowing what else to do I do diagnostics again in spun
>up mode
>
>  RA81> RUN DIAG
>
>%RA81-COMPLETED TEST:DIAG SUBTEST:02
>%RA81-COMPLETED TEST:DIAG SUBTEST:01
>%RA81-COMPLETED TEST:DIAG SUBTEST:07
>%RA81-COMPLETED TEST:DIAG SUBTEST:08
>%RA81-COMPLETED TEST:DIAG SUBTEST:0B
>%RA81-COMPLETED TEST:DIAG SUBTEST:03
>%RA81-COMPLETED TEST:DIAG SUBTEST:19
>%RA81-TEST:DIAG SUBTEST:1B  ERROR:50  UNIT:001
>%RA81-FRU-SLAVE RESPONSE FAIL- SERVO,MICRO
>
>  RA81> RUN SEEK
>
>ENDING CYLINDER? 1000
>
>GROUP? 10
>OPERATION FAILED
>
>
>  RA81> RUN RECAL
>
>%RA81-TEST:RECA SUBTEST:2A  ERROR:50  UNIT:001
>%RA81-FRU-SLAVE RESPONSE FAIL- SERVO,MICRO
>
>At no time I heard any seeking activity. Will's service manual page
>says this:
>
> > D.28 TEST 1B (SERVO PLO TEST)
> > This test checks the servo module PLO circuitry.
> > Errors associated with this test are: 50, 7B, C6, FO to FE.
>
>I don't see any system fault code on the led bits in the front of
>the controller board with the hood open after the E7 "test in
>progress" status byte is cleared. (So I do see the blinkenlights,
>just there is no fault code besides the error message on the
>service terminal.
>
>Error 50:
>
> > 50   Ensure that positioner motor lock is in the unlock
> >      position. If OK, then replace servo module,
> >      microprocessor module
>
>So, sounds like there is once chance for me: to find this
>"positioner motor lock" and move it into the unlock position.
>However, I have no idea how to do that? It sounds reasonable
>that this thing may be locked for transport, I sure hope
>so, because otherwise all my moving and installing this
>thing would have been in vain.
>
>any help with this is appreciated. Not that I depend on the
>RA81 for operation, but I've got it and I believe in having
>a VAX collection with 100% functional stuff.
>
>regards
>-Gunther
>
>
>PS: Anyone having dead RA81's for parts? Anyone has spare
>SDI bulkheads? I need one or two 2- or 4- port bulkheads
>for the RA disks outside the SA600 cabinet.
>
>
>--
>Gunther Schadow, M.D., Ph.D.                    gschadow@regenstrief.org
>Medical Information Scientist      Regenstrief Institute for Health Care
>Adjunct Assistant Professor        Indiana University School of Medicine
>tel:1(317)630-7960                         http://aurora.regenstrief.org
>