Ricoh D124-17 Service Manual page 747

Action
Cleaning
Seven steps are performed for each tank. For example, at HT1:
• First, initial ink filling is performed for HT1 (K1) 5 times (1 to 5). This is controlled by switching the
K1 ink supply motor on/off.
• Second, the print head is flushed with a small amount to ink to prime the print head ("Refreshing" 6)
• Third, the OCFS (On Carriage Filling Sensor) registers the full position of the feeler on the side of
the sub tank (7).
• This sequence is done in order for the remaining print head units: HT2 (K2) 8 to 14, HT3 (C) 15 to
21, and then HT4/HT5 (C/YM) (22 to 28).
• Finally, each print head is cleaned in the order H1, H2, H3, and H4 (29 to 32).
Once the initial filling starts, if the process is interrupted for any reason (a power failure, accidentally
switching the machine off, an SC code, etc.) the filling will stop and then resume from the point of
interruption in the sequence after power has been restored to the machine. This initial fill history is stored
in NVRAM for each print head.
1 H1
[0 to 0xFFFF FFFF/0/1]
2 H2
[0 to 0xFFFF FFFF/0/1]
3 H3
[0 to 0xFFFF FFFF/0/1]
4 H4
[0 to 0xFFFF FFFF/0/1]
2014 Fully Auto Cleaning Process Data DFU
H1 H2
HT1 HT2
29 30
SP2000
H3 H4
HT3 HT4 HT5
31 32
43