Woow, thanks , this is most helpful to me !
BTW, I stated erroneously " DSA602A " while it actually is a DSA602,
but I presume both of them have the very same acquisition board.
Let me explain.
I got some ( USA ) TEK engineer's help and this pointed to the to
service manual :
" Area DmxRAMPipe 4 : suspect hybrid IC FRUs DMUX ( U12050 or 1505 ,
U1450 )
Suspect board FRUs UPACQ WAVPROC ( SIGPROC ) ".
Another ( UK )TEK engineer told me that :
" the hybrid chips U1505 and U1450 should be replaced. Since it is
not quite well possible to replace the chips, the UP Acquisition board
should be replaced instead " .
So, those two TEK engineers' advices pointed obviously to the same
problem and your opinion correlates very well with them !
However, neither of the two could offer me any practical help and the
TEK service discontinued in 2000 ( and if not, it would have been too
expensive for me
But now, likely you can help me out !
Great.
I will do exactly as you say and I do hope sincerely that the 602 will
function again then.
Just one more thing.
Meanwhile, after the start up self test error " (k) acquisition G3A11
" ( which caused me to ask this question ) 3 ( related ? ) new errors
did show up ( they were not there before ) :
(l) L-11A32 index L1631 error 2
(m) C-11A32 Index L1631 error 2
(n) R-11A72 index R1831 error 2 "
Obviously, the last 3 ( new ) selftest errors relate to the three plug
in amps i.e. 2 x 11A32 ( 400 Mhz ) and 1 x 11A72 ( 1 Ghz ).
The two 11A32's are indeed positioned left and center and the 11A72 is
plugged in at the most right position ( correlating to L , C , R ? ).
( BTW they never was any problem with these vertical amps ).
May I presume that the 3 new errors ( they were not there before )
relate to the very same acquisition board error as per my original
question ?
Meanwhile the DSA was not used in whatever way and just yesterday
after powering up these 3 new errors appeared.
Between Tuesday and Wednesday ( I live in Amsterdam, Holland, GMT +1 )
nothing happened to the DSA.
I would greatly appreciate to get your news since much depends on that
for me.
BTW the DSA 602 is a great rig indeed and I will afford much to keep
it running.
Thanks again and I am anxiously awaiting your news.
Peter.