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Service manual
•
error signals
•
printer status signals
•
paper tape feed signals
•
paper cutter end position signal
All these functions are provided by the circuits described in the following subchapters.
Pin #
Descritpion
1
LATCH
2
STB1
3
D0
4
D1
5
STB2
6
M+
7
D2
8
D3
9
M-
10
GND
11
PR-SEL
12
EN1
13
D4
14
D5
15
EN2
16
W-MOT
17
D6
18
D7
19
P-LATCH
20
VCC
Tab. 2.2: Pin description for U4 circuit
Pin #
Description
1
VCC3V3
2
D7
3
D6
4
GND
5
D5
6
D4
7
VCC3V3
8
D3
9
VCC3V3
10
D2
Tab. 2.3: Pin description for U5 circuit
18
Fig. 2.10: Printing control signals
Type
Signal description
I
Signal of data logging into a circuit
O
Printer head activation signal
I
Data input from data bus
I
Data input from data bus
O
Printer head activation signal
O
Tape cutter control signal
I
Data input from data bus
I
Data input from data bus
O
Tape cutter control signal
I
0 V power supply
I
Circuit activation
O
Printer motor activation signal
I
Data input from data bus
I
Data input from data bus
O
Printer motor activation signal
O
Signal of journal winder control
I
Data input from data bus
I
Data input from data bus
O
Signal of data logging into the printer latching register
I
+5 V power supply
Type
Signal description
I
+3.3V power supply
I
Data input from data bus
I
Data input from data bus
I
0 V power supply
I
Data input from data bus
I
Data input from data bus
I
+3.3V power supply
I
Data input from data bus
I
+3.3V power supply
I
Data input from data bus
© Elcom s. r. o.
Euro 2500
TX
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