🚀 go-pugleaf

> I've recently inherited an original HP Laserjet printer. It works
> great in Self Test, but as soon as you hook up a computer to it, it
> goes off-line and flashes an error code 22. Anyone know what an error
> code 22 is?

>Error code 22 is: "The serial or Centronics interface is improperly 
>configured. (See App. A for interface configuration instructions.) -- 
>Press 'Continue' to clear the error. Some data ay be lost. Check your 
>printer interface. Parallel: the cable ay be loose. Serial: check for 
>correct serial pacing option. The printer uses XON/XOFF and DTR/DSR 
>signal protocols rather than the ETX/ACK protocol."

>(App. A: Cable configurations.)

>Which type of HP LJ exactly do you have?

>> Also, there are two ports on the side of the unit: a round 9-pin
>> serial (RS-232 I presume) and a 25-pin D-connector (female pins). Is
>> the 25-pin connector parallel or serial? There's about 12 wires coming
>> from the back of it, so I presume it's parallel, but I've seen another
>> original Laserjet and it has a Centronics connector for it's parallel
>> port. I get the error code when I hook a parallel line from the
>> computer to the 25-pin port, but not when I hook the serial port on
>> the computer to the 25-pin port. If this 25-pin connector on the
>> printer is, indeed, a serial port, does anyone know what the serial
>> line settings are for this machine?

>I think that the 25-pin connector is serial, because HP printers usually 
>have Centronics parallel port. I have documentation about the 9-pin 
>serial connection:

I will make an assumetion that this is a 2686A or eqiv. If so and you are
trying
to use this equip with Windows, forget it!. This equip has only 512K
memory
and will ALWAYS get a error 20 or 22 with windows unless you use the
GENERIC, text only driver...