Radio Shack TRS-80 Service Manual page 43
Pocket computer printer and cassette interface
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Also See for TRS-80:
- Reference manual (274 pages) ,
- User manual (236 pages) ,
- Service manual (199 pages)
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4.
Electrical
characteristics
4-1.
Input/output
terminals
Name
No.
Circuit
diagram
B
I
a
O'"--Q
I
Color position se·nsor
A
2
0
D
3
' " ' "
c
4
fr-
X
motor
B
s
~
A
6
~ioto
r
common
7
<>
D
8
0
~
c
9
Ymotor
8
10
A
II
(+)
B
12
:
r~ooo
1
Magnet
(-
)
A
13
Pen
moves
down when current of
the
above polarity is soppied to the magnet.
4-2. Magnet
I.
Voltage:
2.
Type:
3.
DC resistance:
4. Peak
current:
4.85±0.65V
Sclf·holding
magnet
SQ±
10%
(20°C)
About
I.I
A
(20°C, 4.&SV)
About
1.4A (0°C,
5.SV,
worst case)
4·3. Motor (260
steps/second)
Itenl
X-axis
I
Voltage
4 .85V±.65V
Y-axis
2
T
ype
4·phase stepping
motor
(2 phase
excitat
ion)
3
OC
resistance
(A
l)
30Q
:t
l0%
2
SQ
±
IO%
Pea.
k
current
4
(A2)
Abt. 0
.16A
Abt.
0 .!9A
(per phase)
(A3)
Abt.
0
.23A
Abt. 0 .27A
Average
Current
(A4)
Abt.
0.12A
Abt.
0 .13A
5
(per
phase)
(AS)
Abt.
0
.1
6A
Abt.
O.ISA
Do not sale this PDF
!!!
-41-
Condition
o
-
so•
c
20°c
(re.
s
istance
~r
phase)
20°c, 4.&sv
o•
c
,
5.SV,
(worst case)
20°c,
4.ssv
o•
c
, s .sv
(worst
ease)
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