Epson PX-8 - Page 96

REV.-A
2.7.4 Keyboard Circuit Element Layout
23 diodes and 3 resistors are placed on the keyboard, in addition to the key switches and LEDs.
The diodes are
put in the switch section of the keys indicated in Fig. 2-73. Their locations and
names are
printed on the back side of the keyboard board. The resistors are located as shown in
Fig.
2-73.
D2
D3
D21
D4
I
I I
13
27
28
42
D12
56
D14
69
70
,
: 71
72
,
,
,
D16
D23 D19
D22
D20 D18
R1
{~
--1
R3
R2
r-
--I
Fig. 2-73
Note: The Auto Repeat feature is ineffective for the following keys. (See Fig. 2-73)
2
~ 9,43,57,68,69, 70, and 72
2-72
D1, D5, D10, D9
D6
D13,D15,D17,D7
D11,
D8
~
~