Ricoh D124-17 Service Manual page 800

2. Appendix 2: Service Program Mode
The SP codes above (SP3007) reduce the unevenness in the platen gap of the print
heads in the main scan direction during bi-directional printing. The wider the horizontal
area of printing, the greater the chance of variation in the gap.
These are the factors that affect the head/platen gap:
• The distance between the parallel rod (where the carriage is mounted) and the
• Warp of the parallel rod
• Variation in the heights of individual platen plates
This adjustment is done at the factory. A test pattern is printed, and then from among the
patterns the area where there no streaking is selected.
• The adjustment is done with reference to H2 (K2) with a full pattern print (right to
• 10 places at the edges of the platen (at both ends and where the platen plates are
• This number is registered in an SP code.
Touch [EXECUTE] to execute the following SP codes.
6 Gap Section Correction Pre
7 Gap Section Correction 1016
8 Gap Section Correction 847
9 Gap Section Correction 423
10 Gap Section Correction 1016 K1f
11 Gap Section Correction 1016 K1r
12 Gap Section Correction 1016 H
13 Gap Section Correction 677 K1f
14 Gap Section Correction 677 K1f
15 Gap Section Correction 677 K1r
16 Gap Section Correction 1200
20 Forward-Backward Adjustment Pattern Printing
21 Printing Positon Alignment
22 Transport Roller Correction
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surface of the platen.
left) from one edge of the platen to the other.
joined) the number of the are where streaking is least is selected.