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Disk Drive Operation
take-off. Mounting the recirculating filter close to the disk, positions the filter in the path of the air
flow. This strategic placement of the filter allows the rotating disks to act as an air pump forcing air
through the recirculating filter.
5-2
Drive Electronics
The Winner 3A WA31273A / WA32543A / WA33203A / WA32163A / WA31083A, Winner 2A
WA32162A drives attain their intelligence and performance through the specialized electronic
components mounted on the PCBA. figure 5-2 shows a simplified block diagram of the the Winner
3A WA31273A / WA32543A / WA33203A / WA32163A / WA31083A, Winner 2A WA32162A
electronics. The components are mounted only on one side of the PCBA.
The Preamplifier and Write Driver IC is the only electrical component that is not on the PCBA. It is
mounted on the flexible circuit inside the HDA. Locating the Preamplifier IC as close as possible to
the read/write heads via surface mount technology improves the signal to noise ratio.
Actuator
SPM
5-
4 WA31273A / WA32543A / WA33203A / WA32163A / WA31083A /
PREAMP
&
WD
WRITE
DRIVER
RD
SSI32R2512
HS
COMBO
DRIVER
HA13561
27C1024
Figure 5-2. ELECTRONICS BLOCK DIAGRAM
READ/WRITE
IC
SSI4910B
ABCD
ERD
WG
RG
HS
CPU & AT INTERFACE & DISK
CONTROLLER
SID-9501D
PROM
RRC
NRZ
DATA
CONTROL
CACHE
RAM
128K
KM416C60
A
T
B
U
S
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