Brand: FUJITSU
Category: Computers
Document Type: Manual
Language: EN
Manual for DL6400/6600
Uploaded: Nov. 21, 2025, 6:30 p.m.
Manual Publish Date: 2001-05-01
Warranty Information
This manual does not contain specific warranty information.
Operation Summary
This manual provides comprehensive instructions for operating the FUJITSU DL6400 Pro/DL6600 Pro 24-wire dot matrix printers. It covers initial setup procedures such as removing shipping restraints, installing paper guides and platen knobs, and connecting power and interface cables. Detailed sections guide users on loading various types of paper, including continuous forms and cut sheets, and explain how to clear paper jams. The manual also details the printer's control panel operations, setup mode configurations for print adjustments and hardware options, and provides information on daily inspection and maintenance. Troubleshooting common errors and understanding warning messages are also covered.
Troubleshooting and error codes
| No. | Error name | Error description | Recovery method |
|---|---|---|---|
| 3 | Overflow error | The host transmits data to the printer although the input buffer is full of data (i.e., while the printer is requesting the host to stop data transmission). • The printer ignores the data (data is lost) and a question mark (?) is stored in the input buffer when the error is recovered. | • Check all settings for the RS-232C interface. |
| 4 | Download error | The download buffer overflows. • The printer ignores the data (data is lost). | • Reduce downloaded data. • Reduce the print buffer capacity, i.e., increase the download buffer capacity. |
| 5 | Overrun error | The printer cannot accept data at the rate it is transmitted. That is, while the printer is reading out the input buffer, the host transmits the next data. • The printer ignores the data (data is lost). | |
| 6 | Transmission timeout error | While the printer attempts to transmit data to the host, ten seconds elapse with the output buffer full of data. • The printer ignores the data (data is lost). |
Note: Incorrect settings on the RS-232C do not always cause parity or framing errors. If the baud rates of the host computer and the printer are multiples of 4800, such as 19200, framing errors are not detectable, and meaningless data indicates a setting error. These errors do not affect the line from the host computer. An error remains if the printer is online and no other warning is displayed until push button operation or an operational error or fatal error is detected. The buzzer sounds each time a download error occurs.
LCD model
A warning error message indicates an interface or data format error while the printer is online. The printer remains online and printing does not stop, but the following happens:
- The ALARM indicator turns red.
- An alarm sounds (unless it was deactivated in setup mode).
For example, the display appears as follows when a buffer control error occurs on the serial interface.
| FATAL! |
| Buffer overflow |
The message remains displayed until the printer is placed offline and the error condition is corrected.
| Message | Meaning and solution |
|---|---|
| Buffer overflow | The print buffer fails to accept data. The data is discarded. Check all parameters for the serial interface. |
| Cover is open | The top cover is open or removed. Printing stops. Close the top cover. |
| Download error | The download buffer has overflown. The data is discarded. Reduce the amount of download data, reduce the size of the input buffer to prepare more space for download data, or check the format of download data. |
| Framing error | The printer has received data in an incorrect format. The first byte is replaced by "?" and the succeeding data is all discarded. Check the FORMAT and BAUD RT settings in setup menus or check the interface cable. |
| Out of paper | The printer is out of paper. Install paper and press LOAD/UNLOAD. To resume printing, press ONLINE. |
| Out of paper or jam | The cut-sheet feeder is out of paper, or a paper jam has occurred. Remove the jam, if any. Install paper and press LOAD/UNLOAD. To resume printing, press ONLINE. |
| Parity doesn't match | The printer has received data with a incorrect parity. The data is replaced by "?" Check the interface cable. |
| Alarm name | LEDs lit |
|---|---|
| Power alarm | COUR 10 |
| Left end alarm | PRESTG 12 |
| Overload alarm | COMPRESS 17 |
| RAM alarm | Bold PS |
| FAN alarm | N. Sans PS |
| Head alarm | DRAFT 10 |
| SP motor alarm | DRAFT 12 |
| LF motor alarm | MENU FONT |
| GAP alarm*1 | COUR 10, COMPRESS 17 |
| Ribbon motor alarm | COUR 10, Bold PS |
| JAM lever alarm*2 | COUR 10, Time PS |
| CSF motor alarm | COUR 10, N.Sans PS |