Samsung CLP-300, Service Manual

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Samsung Electronics
Service Manual
Alignment and Adjustmens
6-2
6.2 Function
6.2.1 KEY Function
There are two keys present. The one is Stop key and the other is Black only key.
If users input key value, the key input is transferred via GIP (General Input Port) and the operation to be
defined by key value is processed.
6.2.1.1 Functions
Stop key function is made up of
- Demo page/Configuration sheet printing function
- Job cancels function
- Start manual feeding function
- Firmware downloads mode function
Black only key function is made up of
- Change printer mode to Black-only mode function
- Black only LED light function
6.2.1.2 Detail Description
KEY input detection & process order
1) User KEY input
2) KEY input detection
: If the key input is detected when the key input check per timer tick 10ms, The 10ms interrupt service
routine sends the key detection event to panel task.
3) KEY input process
Stop key input process
: After the panel task is received the Stop key detection event, it checks the engine error status two times
and process the operation to be defined by key value.
- Demo page/Configuration sheet function
This button will have multiple functions when the printer is in idle state.
Demo page printing
Press and hold this button for about 2 seconds until the control panel lights blink slowly to print a
demo page.
Configuration sheet printing
Press and hold this button for about 6 seconds until the control panel lights blink rapidly to print a con-
figuration sheet.
- Job cancels function
When the printer is printing an active printing job, press and holds this button until the control panel
lights blink to cancel a job the printer is currently except the manual job.
- Start manual feeding function
When you select manual feed for paper source, press this button each time you feed a sheet of paper
manually.
The application of manual feeding function in CLP-300 will be determined