Buffer Full Printing; Buzzer; Error Detection Function - Epson DFX-8000 Service Manual

1.3.5

Buffer Full Printing

The printer stores the received data in the input data buffer, and prints it when it receives a print
command (CR). Printing is also performed when the buffer becomes full.
1 . 3 . 6 B u z z e r
The control panel buzzer sounds at the following times:
When ESC command "BEL" is input:
When a paper end is detected:
When an open cover is detected:
When a carriage error is detected:
When an abnormal voltage is detected:
When the RAM check detects an abnormality:
CPU RAM abnormality:
Lower address RAM abnormality:
Upper address RAM abnormality:
When a printhead driver abnormality (short circuited) is detected:
Short circuited fan transistor:
"COPY MODE" selection (press the FORM FEED switch in on line):
"COPY MODE" is selected:
Normal mode (quit "COPY MODE"):
When a paper error is detected:
(incomplete paper back-out, or paper empty during paper operation)
Illegal paper memory setting:
1 . 3 . 7 E r r o r D e t e c t i o n F u n c t i o n
This printer has an error detection function which sets the interface signals to the following states and
the unit to the OFF LINE mode. Data cannot be input at this time.
Parallel interface
BUSY signal: High
ERROR signal: Low
Serial interface
DTR (REV) signal: MARK
X code (DC code): XOFF (DC3\l 3H)
The following errors can be detected and the buzzer is used to indicate the
error state. (Refer to 1.6.2)
Carriage error:
Abnormal voltage:
The carriage home signal is not detected
while initializing the printer mechanism, or the carriage home
position is detected during printing.
A low internal DC voltage is detected.
1-29
X 1 time
X 5 times (Total 20 times)
X 1 times
X 6 times (Total 18 times)
X 5 times
6 times
X (Total 12 times)
X 8 times (Total 16 times)
X 10 times (Total 20 times)
X 10 (1 1) times
X 16 times (Total 32 times)
X 2 times
X 1 times
X 3 times
X 10 times
REV.-A