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REV.-A
15: CR position regulator
Select this mode to check the CR position register in IC4B (GA).
The register value in IC4B is displayed on the LCD panel in hexadecimal format.
Select this mode after checking modes '08' and '14'.
Check the CR position register in IC4B by moving the carriage with your hand).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the carriage motor, replace IC4B (G.A.).
The CR position register is reset by the home position signal and it is incremented by moving the carriage
to the right.
16: Release sensor
Select this mode to check the release sensor. The state of the release sensor is displayed on the LCD
panel. Check the release sensor operates normally by operating it manually (i.e. move the release sensor
with your hand).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the C.S.F sensor, replace IC 12C (G.A.).
17: Buzzer check
Select this mode to check the buzzer drive circuit. When this mode is selected, the buzzer drive circuit
is activated.
To exit this mode, press the ON-LINE switch.
18: Bsy,Ack,Pe,Er H/L
Select this mode to check the operation of the control signal output lines on the parallel interface.
When this mode is selected, the PE, ERROR, BUSY and ACK signal lines change between HIGH and
LOW at a constant rate so that the operation of each line can be checked easily.
To exit this mode, press the ON-LINE switch.
19: A t,Sin,P/5,1 nt RD
Select this mode to check the operation of the control signal input lines on the parallel interface.
When this mode is selected, the AUTOFEED-XT, SELECT-IN, PIS (PARALLEL/SERIAL), and INIT signals
lines are displayed on the LCD panel so that operation of each line can be checked easily.
To exit this mode, press the ON-LINE switch.
20: Parallel data RD
Select this mode to check the parallel interface.
When this mode is selected, data input through the parallel interface is displayed on the LCD panel
in hexadecimal.
To exit this mode, press the ON-LINE switch.
21: RS-232C loop back
Select this mode to check the operation of the RS-232C serial interface.
Connect the RxD and TxD terminals on the serial interface connector using a jumper.
In this mode, the LCD displays the followint:
5-19
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