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PRODUCT
INFORMATION
[1] PRODUCT DESCRIPTION
The HP 9153/54 A and B Disc Drives (Figure 1-1) are random access data storage devices.
The HP 9153 A
and B contains a single 3 1/2-inch double-sided flexible drive providing
710 Kbytes (at 512 bytes/sector)
of storage capacity and a 3 1/2-inch Winchester disc drive which provides 10Mbytes of storage capacity for
the HP
9153A
and
20Mbytes
for the HP
9153B.
The HP
9154 A and B only contains
a 3 1/2-inch
Winchester disc drive; 10 Mbytes for the HP 9154A and 20Mbytes for the HP 9154B.
There are two versions of the HP 9153/54A product.
Units with a SN Prefix of 2515A and lower have a
full height 3 1/2-inch floppy drive, two PCA's for the controller, and
power supply comprised of a trans-
former and PCA.
Versions of the HP 9153/54A with a S/N prefix of 2702A and higher use a half -height
3 1/2- inch floppy drive, an intrigrated switching power supply, and a single controller PCA that uses sur-
face mount
technology.
The newer
HP 9153/54A's are essentially identical to the HP 9153/54B
except
that the HP 9153/54A only has a 10Mbyte hard disc capacity.
Figure 1-la. HP 9153/54B and HP 9153/54A (Front View)
S/N prefix 2702A and higher.
1-1
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