Ricoh A-P4, Service Manual

Page: 80 / 381

LD Unit
LD Unit Replacement
1. Laser unit (See ‘Laser Unit’)
2. LD unit [A] ( x 3, x 1)
• To avoid damaging the LD board, hold it securely when disconnecting the connectors. Hold the
laser unit casing.
3. After replacing the LD board, do SP 2-109 to adjust the laser beam pitch (described below).
Laser Beam Pitch Adjustment
After replacing the LD board, do the laser beam pitch adjustment. There are two procedures: one for 400
dpi, and one for 600 dpi. These use the following SPs.
SP2110 Test Mode Dpi (0: 400 dpi, 8: 600 dpi)
SP2109-01 LD Beam Pitch Adjustment – 400 dpi
SP2109-02 LD Beam Pitch Adjustment – 600 dpi
SP2109-03 LD Beam Pitch Adjustment – 400 dpi Initial Setting
SP2109-04 LD Beam Pitch Adjustment – 600 dpi Initial Setting
Laser Unit
79
3