NEC FD1165 - Schematic Diagram - Part 1

+5F
READ DATA
TWO SIDED
DISK CHANGE
READY
FilE UNSAFE
WRITE PROTECT
I TRACK 00
; DlKI
!
(2)
20 IIIDEX
5C
I FU
HlDO
'(2)
I:~NO
'--------_t> I:ll
I~~OO
'-----------l~,1~4~'0
SN7406N
1\ 10
11
I:~FO
'--..,..._----------1>' RGn
1(4)
L-- -l'> 1:"1
2E
SN74LS04N
'-- I~ 2
lG
9 SM74J811
RD
r,----.
Ron
(4)
r.:;---:-------t-----------------------t> !RIXl
'(2)
t- ~12:...1SN74J8N
13 \O------------l
+SF
I
48
VDO
jlD525020
21
DSXO
37
IDXl
Z7
HlDO
Jil
2501
29
FLRO
36
FUSl
SSlO
RDYl
11
J4
DIRO
WPTI
22
32
WGTO
,TKOl
18
31
STPO
DCGl
2.J
WDTO
1\
PRTO
RIXI
J8
12
TK01
RRYl
19
6
4
7
IXIO
HlOO
IXOO
WEND
45
3
DOPO
WSLt
412
REIIO .EGOO
48
ClKI
EG10
41
PlZl
WDFl
25
DlHD
RGTl
43
PRIO
SWFl
J9
DRHO
PH10
13
DLSO
PH20
14
DRlO
PHJO
15
SDHl
PH40
16
MlNl
DlKO
FLSl
24
DSXl
(2)
3H
+SF
~WGTD
! ""-(!l
+SF
RM!i' 10K
6
...----11--------1----1 .... > ~~lO
L----'----b USED
I2l
SC
r-'
1 I
2
1
.-L- 110 USE
-., • I
L __ I
+SF
lson
lC
74LSl4PC
t--+-I-------~=-I .;:~-----------------!9!...1 8
IC
74LSI4PC
t--+-~-+----~~ ..;;»- ...- ~1~1 10
1---+---411---+-----=-1 ~"";"" ....[> lWCl
(4)
DIRECTION
PRTD
(31
TROl
(3)
IX10
(3)
IXOO
(3)
MINl
(3)
REIIOI
(2)
ClKl
(2)
PIZl
(2)
III USE
STEP
HEAD lOAD
WRITE GATE
WRITE DATA
SIDE SELECT
DRIVE SELECT 1
DRIVE SELECT 3
DRIVE SELECT 2
DRIVE SELECT 4
HEAD CURRENT SW
FilE UNSAFE RESET
134-11'0390- 50 1- 0
FDl165
G9NYF PCB (Sheet 1 of 4)
7-3/4