Service Manual
Page 30
... command (ESC @) ~ Page length command (ESCC) 2 IBM top-of z beeps) *** (4 beeps) A short circuited printhead is detected. (The head driver FETs are bad.) A short circuited printhead fan is detected due to th~ far left position (carriage home). A cover open is detected: The cover open ..., as shown below. A paper out or paper jam is detected. (The printer runs out of 3 *) Note: ** 0.1 second interval * *0.3 sWmd interval 1-22 Rev. When this function is out at power on . Clears download characters (CG ROM copy in the following functions: Returns the printhead to : - Sets the...
... command (ESC @) ~ Page length command (ESCC) 2 IBM top-of z beeps) *** (4 beeps) A short circuited printhead is detected. (The head driver FETs are bad.) A short circuited printhead fan is detected due to th~ far left position (carriage home). A cover open is detected: The cover open ..., as shown below. A paper out or paper jam is detected. (The printer runs out of 3 *) Note: ** 0.1 second interval * *0.3 sWmd interval 1-22 Rev. When this function is out at power on . Clears download characters (CG ROM copy in the following functions: Returns the printhead to : - Sets the...
Service Manual
Page 59
...the printhead control circuit as an interrupt-to-fetch operation. Table 2-3 describes the functions of download characters, in PS-RAM, and converts the image data to the input buffer in the download CG). Table 2-3. Holds the CPU working area and buffers (input, line, and image ...and expands the data in the image buffer (in the case of the main printer components. the printer performs steps 6 through 8 twice. When the CPU expands the data from the CPU clock) Q Printhead driver control D CR motor driver control LI CR and PG motor pulse encoder l/O (input/output) Q Encoder pulse...
...the printhead control circuit as an interrupt-to-fetch operation. Table 2-3 describes the functions of download characters, in PS-RAM, and converts the image data to the input buffer in the download CG). Table 2-3. Holds the CPU working area and buffers (input, line, and image ...and expands the data in the image buffer (in the case of the main printer components. the printer performs steps 6 through 8 twice. When the CPU expands the data from the CPU clock) Q Printhead driver control D CR motor driver control LI CR and PG motor pulse encoder l/O (input/output) Q Encoder pulse...