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<DIV><FONT face=Arial size=2>Hi, </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>I have a 606 here that i recieved in a very bad
state. Multiple torn tracks, melted wires, suspect soldering - generally a
mess.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Ive removed what was left of the non-functioning
midi kit, and set right all that i can find thats wrong, but i still cant get
the sequencer working.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>The symptoms are:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>In any mode, only one led is initially lit - the
pattern group one.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>In pattern mode (either write or play) no pattern
leds are lit, except if group more then one pattern together in the way that you
normally do (press and hold first, press and release last, release first).
If this is done all the grouped patterns leds light *but not the first in the
group*</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>It makes no difference which led is showing the
first pattern in the group (ie if you group different patterns), but always the
first in the group dosnt light.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Hitting the run/stop button lights the run/stop led
as youd expect, but theres no led tracking across the steps. Pressing the
steps (like youd normally enter drum hits) has no effect.</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Where im at so far:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Ive swapped out the cpu, memory, the various cmos
ics of the sequencer with those of a known good machine. The known good
machine is running with the parts from the bad machine flawlessly.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Ive replaced all wires to/from the switchboard and
checked the others.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Ive made sure that the 2.2us clock is present at
the CPU</FONT></DIV>
<DIV><FONT face=Arial size=2>Probing pins of IC2 clearly show that the tempo
ocilator is working, and responding to responding to changes of the tempo
dial, but i havent followd the clock beyond IC2 yet.</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Im getting to the edge of what i should
check. Any suggestions?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Thankyou, Julian</FONT></DIV></BODY></HTML>