31 Jan
2008
31 Jan
'08
11:09 a.m.
All,
I am trying to ID a chip from a SFD-1001 motor control board. This
is printed on the chip:
JAPAN SERVO
SA1001
3A
It looks like a normal DIP, except for the middle pins which
look to be twice as wide. Is this for heat sinking? I have tried
searching for this chip but so far have found nothing. The board has
this marking;
PC-368C
JAPAN SERVO
TDK-T15V
Which also has not turned up anything useful.. The 5 1/4"
drive mech this board is connected to was made by Matsushita and its
model # is JU-570-2.
From reading the SFD-1001 technical manual, the 5 1/4"
mech is just listed as a part so it does not have any detailed
information for this board. :(
Cheers,
Bryan
31 Jan
31 Jan
3:02 p.m.
All,
I am trying to ID a chip from a SFD-1001 motor control board. This
is printed on the chip:
JAPAN SERVO
SA1001
3A
It looks like a normal DIP, except for the middle pins which
look to be twice as wide. Is this for heat sinking? I have tried
Almost certainly yes.
Is this one of those direct-drive spindle motors, commonly found in
half-height drives/ That chip sounds like the device that takes in the
signals from hall effect sensors (which detect the postion of the rotor)
and sends current through the 3-phase motor windings.
The full-height 3.5" SOny drives that HP used (and which I get to
repair..) used something similar. In that one, the chip was a standard
part, used in some VCRs, and I amnaged to get a replacement. Over the
years I've hard on chip fail and one hall sensor fail.
Alas I have no idea where to find data on your chip, but I will keep on
thinking. Why do you suspect it's faulty?
-tony
1 Feb
1 Feb
2:37 a.m.
New subject: [personal] Chip ID and datasheet?..
That chip, can't remember the style, had wider pins for heat sinking, some
had 2 or 3 pins per side as one large tab for greater effect.
They can be a bugger to get off, hot air reflow seem to work better. Have
used a paint stripping gun on low heat to good effect, but use care.
Other than that I've not been able to find any datasheets, not much help I'm
afraid.
Mike.
It looks like a normal DIP, except for the middle pins which
look to be twice as wide. Is this for heat sinking? I have tried
searching for this chip but so far have found nothing. The board has
this marking;
PC-368C
JAPAN SERVO
TDK-T15V
Which also has not turned up anything useful.. The 5 1/4"
drive mech this board is connected to was made by Matsushita and its
model # is JU-570-2.
From reading the SFD-1001 technical manual, the 5 1/4"
mech is just listed as a part so it does not have any detailed
information for this board. :(
Cheers,
Bryan
3:51 a.m.
New subject: [personal] Chip ID and datasheet?..
Mike Hatch wrote:
That chip, can't remember the style, had wider
pins for heat sinking,
some had 2 or 3 pins per side as one large tab for greater effect.
They can be a bugger to get off, hot air reflow seem to work better.
Have used a paint stripping gun on low heat to good effect, but use care.
Other than that I've not been able to find any datasheets, not much
help I'm afraid.
Dremel or cut off the leads and remove the leftovers if you
have a
known bad part.
Trying to save a component that is questionable and endangering the
possibly irreplaceable PC board when chip replacements are available
is not a good idea.
Jim Davis.
3:56 a.m.
New subject: [personal] Chip ID and datasheet?..
davis wrote:
Mike Hatch wrote:
I typed that? Also, don't jog on the highway, eat funny mushrooms or rob
liquor stores for fun.
Jim Davis.
Sorry.....
That chip, can't remember the style, had
wider pins for heat sinking,
some had 2 or 3 pins per side as one large tab for greater effect.
They can be a bugger to get off, hot air reflow seem to work better.
Have used a paint stripping gun on low heat to good effect, but use
care.
Other than that I've not been able to find any datasheets, not much
help I'm afraid.
Dremel or cut off the leads and remove the leftovers if you
have a
known bad part.
Trying to save a component that is questionable and endangering the
possibly irreplaceable PC board when chip replacements are available
is not a good idea.
Jim Davis.
4:27 p.m.
New subject: [personal] Chip ID and datasheet?..
Mike Hatch wrote:
Certianly.. But in this particular case, firstly, is a replacement chip
availale, nobody seems to have heard of it. And secondly, most flippy
drive spindle motor PCBs are single- sided, maybe the odd one is double
sided. I've never seen a multi-layer one. And the circuitry is slow
enough hhat you could repair lifted traces, etc with kludgewires and
expect it to work afterwards.
So I doubt you'd ruin the PCB beyond repair, and the chip might not be
availale. In this case it might be worth trying to save the IC....
-tony
That chip, can't remember the style, had
wider pins for heat sinking,
some had 2 or 3 pins per side as one large tab for greater effect.
They can be a bugger to get off, hot air reflow seem to work better.
Have used a paint stripping gun on low heat to good effect, but use care.
Other than that I've not been able to find any datasheets, not much
help I'm afraid.
Dremel or cut off the leads and remove the leftovers if you
have a
known bad part.
Trying to save a component that is questionable and endangering the
possibly irreplaceable PC board when chip replacements are available
is not a good idea.
6168
days inactive
6170
days old
5 comments
4 participants
participants (4)
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ard＠p850ug1.demon.co.uk -
bpope＠wordstock.com -
davis＠saw.net -
mike＠brickfieldspark.org