Epson FX-80 Technical Service Data page 16

IC
PINOUTS,
TERMINAL GUIDES
AND
SCHEMATIC NOTES
TERMINAL GUIDES
1
o o
7 o
3
o o
4
5
6
?
g
r~~"
9
ENT
W
11
o o
12
B
14
15
16
o o
CN1A
PIN VIEW
CN5
TOP VIEW
CN3
TOP VIEW
r?
/1PA79C
11
r^o 01
U"
1
h
,
02
i?
i^_
l>° LxJ
03
13
rv.
,
U~U,_
04 14 f"^
^L^
05
15
K.
l^-UfJ
06
i6 r^=
L>
U^
07
17 rSo
pxw
VCC
1», 2C,
8C
TRI-STATE INVERTER
TOP VIEW
Q0 VCC
Qi G
Q2
A4
Q3
A3
Q4
A2
Q5 Al
Q6 A0
GND
Q7
PROM
TOP VIEW
cm
TOP VIEW
CN6
TOP VIEW
CN7
TOP VIEW
=m
32?
326
325
=124
323
=322
\
321
\
320
\
319
\318
on
pis
3?
15
E
C B
Ql. Q2, Q3
05, Q16.Q17
Q18
BOTTOM VIEW
.•_".
K
i
%'-'- K
• 9 » El«
~*
Ml
C
K BOTTOM VIEW
3C
TOP
VIEW
M2
BOTTOM VIEW
5A \
TOP VIEW
I0ENT
/
r
CN4
TOP VIEW
1 2 3
4 5 6
7 8
1 10
H
12 13 1'
IC2
FRONT VIEW
TT
V
a;
vcc
A6
AS
A5
A9
A4 W
A3
a
A2 A10
Al
B
AO
0Q8
DQ1
DQ7
002 DQ6
DQ3 DQ5
VSS 0Q4
I I !
I
I I
I
1
3 9 10
H
12
13
IC1
FRONT VIEW
TT
' 58,78
7C, 8A, SB
TOP VIEW
12
3 4 5 6 7
DM!
SIDE VIEW
TT TT
2 3 4 5
Ml,
M3
12
3 4
5
RMS
SIDE
VIEW SIDE
VIEW
X IDENT
E C
B
Q4, QJ5
FRONT VIEW
IDENT ice
Q6 THRU
QJ4
FRONT VIEW
2 3 4 5
6;
RM6,
RM7
SIDE VIEW
2 3
4 5 6 7
RM2
SIDE VIEW
2A,
3A
RAM
TOP VIEW
1CIR
"
VCC
2CLR
2D
2CK
;
2PR
2Q
2Q
ID
ICK
1PR
1Q
1Q
cm
D
>CLR
PR
Q
Q
CLR
D
C«<
PR
1
FLIP/FLOP
TOP VIEW
CN2
TOP VIEW
VPP vcc
28
A12
PGM
27
A7
NC
26
A6
A8
25
A5
A9
24
A4
All 23
A3
0E
22
A2
AW
21
Al
CE 20
AO
07
19
00 06 18
01
05 17
02
04 16
GND 03
15
4A
PROM
TOP
VIEW
C42010EB/W8L8042H
TEST0 VCC
XTAL1 TEST1
XTAL2
P27/OACK
RESET P26/DRQ
SS P25/IBF
CS P24/OBF
EA P17
RD P16
A0 P15
WR P14
SYNC P13
DO P12
Dl
Pll
D2 P10
D3
VDO
D4 PROG
D5 P23
D6 P22
D7 P21
VSS P20
SLAVE PROCESSOR
TOP
VIEW
1
PAO VCC 64
2
PA1 VDO
63
3
PA2 PD7 62
4
PA3
PD6 61
5 PA4 P05 60
6
PA5 PD4
59
7
PA6 PD3 58
8
PA7 P02
57
9 PBO PD1 56
10 PB1 POO 55
11
PB2 PF7 54
12
PIS
PF6 53
13 PB4
PF5 52
14 PI5 PF4 51
15
PB6 PF3 50
16 PB7
PF2 49
17
PCO
PF1
48
18
PCI
PFO 47
19
PC2 ALE 46
20 PCS WR 45
21 PC4
RD 44
22 PC5 AVCC 43
23 PC6
VR 42
24 PC7 AN7 41
25
INTO AN6 40
26 INT1 AN5 39
27
Ml AN4
38
28
RESET
AN3 37
29
MD
AN2 36
30 X2 AN1 35
31 XI
ANO 34
32 VSS AVSS 33
38
MICROPROCESSOR
TOP VIEW
IDA
TRI-STATE
BUFFER
TOP VIEW
SCHEMATIC NOTES
-*-Circuitry not
used
in
some
versions
--Circuitry used
in
some
versions
e
See
parts list
+
Ground
Voltages measured with
digital
meter.
Waveforms and
voltages are taken
from ground, unless
noted otherwise.
Voltages,
waveforms and
logic
readings taken with
printer
On
Line
and
in self-test
mode
unless otherwise
noted.
Switches
SW1
and
SW2
set
as shown on schematic.
Waveforms
taken with triggered
scope and Sweep/Time
switch
in
Calibrate position, scope input set for
DC
coupling on "O" reference voltage waveforms. Switch
to
AC
input to view
waveforms
after
DC
reference
is
mea-
sured
when
necessary. Each waveform
is
7.5cm width
with
DC
reference voltage given
at the
bottom
line of
o
TO
*»4
L o
X z
do
o
each waveform. Time
in [is per
cm,
given with p-p
reading
at the
end
of
each waveform.
Item numbers
in
rectangles appear
in
the alignment/adjust-
ment
instructions.
Supply voltage maintained as
shown
at input.
Controls adjusted
for
normal operation.
Terminal
identification
may
not
be found on
unit.
Resistors are
VaW
or less,
5%
unless noted.
Value
in
( )
used
in
some
versions.
NOTE:
Logic probe readings taken with printer
On
Line
and
in self-test
mode
unless otherwise noted. Switches
SW1 and
SW2
set as
shown on schematic.
Logic Probe Display
L
= Low
H =
High
P
=
Pulse
*=Open
(No
lights
On)
(1)
Probe indicates
H when
printhead
is at
home
position,
(2)
Probe
indicates L
when printhead
is at
home
position.
(3)
Probe indicates P during line feed.
(4)
Logic readings not taken.
(5)
Do Not Measure.
36