DOUBLE-DENSITY
DISK
CONTROLLER
.....,11
7
..
5
C,
Integrated
Circuits
(Cont'd)
COMPONENT
NUMBER
PART
NUMBER
MAYBE
REPLACED
WITH
IDENTIFICATION
U16 HE 443-998 WD1691
t-
::;)
o
'"
s:
I~
U17
HE 443-999 74LS624
C'
PREAMP
ADJ.
Vee
OPW
17
U18
HE 443-1000 WD2143-03
U19, U20,
U21, U22
HE 443-73
7416N
U23 HE 442-627
78L05
'"
~
G:P'
IN
