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Epson PX-8 - Page 26

Epson PX-8
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No.
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
CN11
CN9
32
31
30
29--==
Name
Main
CPU
Gate array
CN7
CN3
Auxiliary battery
CN2
SW2
Gate array
ROM
capsule
SW4
CN4
TH1
Serial controller
ROM
REV.-A
234567
8 9
10
16
17
Fig.2-1
MAPLE
Board Element Layout
Table 2-1
MAPLE
Board
Major
Components
Function No. Name
Function
External speaker connector
2
CN10
Analog signal
input
conne-
Barcode reader
connector
ctor
Z80
CPU
package
4 Gate array
GAH40M
package
GAH40D
package
6
LCD
controller SED
1320
package
RS-232C interface connec-
8 CN8
Expansion interface connector
tor
10
CN6 Serial interface
connector
Microcassette interface con-
12
V-RAM
6kB LCD RAM
nector
90
mAH
backup battery
14
SW3
Auxiliary battery control
switch
Main battery connector
Reset
switch
16
CN1
AC adaptor
input
(charge in-
put)
connector
GAH40S
package
18
F1
Fuse
3A
(32
kB
x 2)
20
Sub-CPU
6303
CPU
package
8-position
DIP
switch
22
SW5
Initial reset
switch
Keyboard interface connec-
24
D-RAM
64kB
x 8
tor
26
4-bit
CPU
7508
CPU
package
Thermistor
(for temperature
sensing)
28
VR1
Speaker volume visual angle
adjustment
variable resistor
82C51 package
30
SW1
Power
switch
32kB
ROM
32
CN5
LCD
interface
2-2

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