>I just got a used HD24 yesterday. Both supplied drives mount and
>operate fine in Bay # 1 but when in Bay 2 they mount and then
>dismount. Afterward, the display says "check jumper setting." I find
>nothing in the manual about a different jumper setting for Bay 2. The
>only thing mentioned is that all drives should be set for
>master/single. Any one know what's going on here?
>Rick Ruskin
Hi Rick -
Might be an incomplete mating of the caddy into the receiver.
Possibly the drive 2 connector has shifted slightly out of alignment - it's hard to
judge by eye, though. The caddy/mating system has been somewhat notorious for not
always getting a perfect, solid connection. You could try loosening the mounting
screws inside the machine, sliding the mating assembly foward a touch, then
retightening. (Beware cheap screws; use a correct screwdriver.) Could also be that
the front panel frame is off just enough to prevent a full seating on bay 2.
For many this has been intermittent based on several tolerances being slightly off.
Many have solved this by putting small washers on the screws that tie the connector
to the caddy. The washers go between the connector and frame such that the caddy
connector is lifted out just a little more (single washer thickness is usually about
right). This causes more full seating of the the caddy into the host connector.
While I never had any connection problems with the drives on my HD24XR, I have done
the washer mod and all the caddies that have had the mod feel way more secure
when they seat.
It's a great machine, with many good features for the money, but this part of its
execution isn't the best. Be gentle with it, don't force it, but try giving it just
a little help in this area and see if that doesn't clear the problem.
Hope that helps,
Frank Stearns
Mobile Audio
--
.
You might want to visit the HD24 yahoogroup. There are a few known
problems involving the physical connection of the drive to the bay.
One fix involves adding plastic washers to the caddy behind the
multipin connector. Essentially the drive is not making full contact
so it dismounts. I've had problems with a particular drive/caddy, and
haven't been able to determine if it's the drive itself or the caddy.
Sometimes it works, sometimes it doesn't! Also the HD24 appears to
prefer some brands of harddrive over others. Good Luck!
> You might want to visit the HD24 yahoogroup.
Indeed, strongly recommended! - also consider that the drive bays are not
designed for the road, either take the drives out during transport or
transport the unit "drives up".
Kind regards
Peter Larsen
I've tried all auggestions and nothing helps so far. I have
determined that any drive in bay 2 is not getting power. Swapping the
power connectors makes no difference. All ribbon connectors are
tight. Any ohter suggestions as to what the cause(s) might be?
Rick Ruskin
The meter will tell you. The meter is your friend. Track from the power
pins on the connector on back.
Odds are there is a fuse or a "safety resistor" that is gone, assuming
you don't have a timer to delay power on for the drive.... in which case
the timing circuit is suspect too. The meter will tell you for sure.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
> I've tried all auggestions and nothing helps so far. I have
> determined that any drive in bay 2 is not getting power. Swapping the
> power connectors makes no difference. All ribbon connectors are
> tight. Any ohter suggestions as to what the cause(s) might be?
That kind of points to the drive bay. The one that's used in the
Mackie hard disk recorders has a little circuit board inside with
several components on it. I've had one fail on me, and a couple of
others have, too. If the cables reach, you could swap them and see if
the same drive bay (with the cables swapped, the "other" drive with
respect to the recorder) still has the problem.
You will probably have to deal with Alesis to get a replacement.
Remember that the HD24 actively switches drive bay power
on/off under control of the computer firmware. It is possibly a
problem with the power switching mechanism. I have not looked
closely enough to know exactly what that is.
Romeo Rondeau wrote:
> http://www.samedaymusic.com/product--ALECADDY
If that was the part he needed, he could tell because the "faulty" drive
wouldn't work in either hole. What he might need is the part that's
installed in the recorder, not the enclosure for the bare disk drive. I
wasn't aware of the firmware-controlled power switching for the disk
drives that Richard mentioned. That could be a nasty problem to find
since it's difficult, without getting pretty far into the inner
workings, whether it's a hardware or a firmware problem. And if it's a
firmware problem, it could require a replacement or reprogramming of an
EPROM,
--
If you e-mail me and it bounces, use your secret decoder ring and reach
me here:
double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers
(mriv...@d-and-d.com)
This problem solved. Bad transistor on the drive bay pc board.
New problem: No signal at input of tracks 21 & 22. A/D converter for
that position is toast. Part # is AL1101. Can these be purchased
individually or will I be forced to buy an entirely new A/D assembly?
> This problem solved. Bad transistor on the drive bay pc board.
Good work. I have a dead Mackie (Lian Li RH-58) drive bay here. I
probably should figure out what's wrong with it and fix it.
> New problem: No signal at input of tracks 21 & 22. A/D converter for
> that position is toast. Part # is AL1101. Can these be purchased
> individually or will I be forced to buy an entirely new A/D assembly?
It's a Wavefront part, which is Alesis Semiconductor. If you can find a
distributor that carries the chip, you should be able to buy it
separately. Did you check the DigiKey catalog?