Gestetner A193 Service Manual page 811

3.6.2 Connection Between Printer Controller (Printer Enhancement Unit)
and Host PC or Macintosh
Important:
It is not recommended for service technicians to operate the customer's computer.
This is to avoid any liability of loss to the customer's data files.
The following procedures are explained only for testing purposes.
– DOS Based Computers –
1. Make sure that the printer cable is properly connected.
2. Turn on the machine, then turn on the computer.
3. Press the printer key to select the printer mode.
4. Make sure that the printer controller is online (indicating "Ready PCL" or
"Ready Auto").
5. After DOS has started, type the following at the C:/> prompt:
PRINT CONFIG.SYS (then return)
The computer displays the following:
NAME OF LIST DEVICE (PRN); (then return)
Then, type the following:
LPT1: (then return)
The config.sys file will be printed from the machine.
(A643) 1-22 SM