Brother HL-4200CN Service Manual page 105

• HDD
Optional HDD is used for two uses described below.
The space used for each function is divided into partitions by the fixed ratio. The space
doesn't have relation each other.
The ratio cannot be changed.
*Breakdown:
(1) Job Log: 2MB
(2) PostScript file system: 512MB
(It would be the half of the whole HDD if the capacity of HDD is less than 1GB.)
(3) Memory sort on HDD: rest of capacity
* It can be confirmed on the printer setting list.
1. Memory sort on HDD
Printing is executed by copying pages per job.
(For example, in case of 5 pages document, it prints in order as 1,2,3,4,5, 1,2,3,4,5...)
Characteristic:
It starts to print the first set and store the job to spool area simultaneously when only
the printed data of the first set was received from a printer driver. The printing speed
of second set and later can be faster by using the stored data.
Therefore, the burden of a driver and communication traffic between a host and a
printer can be reduced, and the entire throughput can be enhanced.
High speed electron sort implemented HDD causes a printer error and cancels the
rest of printing if the data which spools to the HDD exceeds the capacity of the HDD.
2. PostScript file system
The file system function of PostScript can be used.
Generally, it is used to memorize initialization job and Type1 font.
5.11.2 Reference diagram
MCU HL-4200
CONTROLLER BOARD
FONT CARD
Fig.3-44
III-41
HDD
PWBA HBN DRV
HARNESS ASSY AC SW
FAN REAR
LVPS