Whenever we print pages after the printer hasn't been used for a while, the first page prints bad. It has white areas and stripes from top to bottom. Following pages are alright and usually next jobs are fine as well.
Warmup mode is set to 'Job Activated', before it was 'Intelligent Ready' with same problem.
Standby settings are 'Idle After Timeout'. Fast resume is 'Off'.
System version is '1.3.8.P' on OS X 10.9. Page count is at 10306.
Any idea how to solve this?