Ricoh Beluga-C1 Training page 169

LPH Replacement and Adjustment
Turn on these two
LEDs with SP 2952 001
Slide 169
LPH REPLACEMENT AND ADJUSTMENT
Adjusting the SP Settings
The top diagram shows how the LEDs should light.
The bottom diagram shows not enough LEDs lit at the left joint and too many at
the right joint.
On the test pattern, this will cause a white line one-third of the way across,
and a black line two-thirds of the way across.
The SPs switch off LEDs in the central segment of the LPH (LPH 2). The LEDs
in LPH 1 and LPH 3 are not affected.
Adjusting the SPs up in intervals of 10 (410, 420, etc.) switches off one LED
for every interval of 10, and adjusting down 10 switches on one LED.
Adjusting the SPs up less than 10 (411, 412, etc.) decreases the light
intensity of the LED at the end of the row of lit LEDs, and adjusting down
less than 10 increases the light intensity.
The LED at the border between lit and unlit LEDs will be affected.
To remove a line, adjust by 10 until it goes away. Then adjust the other way by 1
until it just appears again, then adjust back the other way by 1 to finish (the line
should have just disappeared). Then make test prints to ensure that the copy
quality is tolerable.
Why do we have these intervals of 1/10? The LEDs are not perfectly lined up
vertically; this will be explained later.
Perfectly adjusted
Incorrectly adjusted
Turn off this LED with
SP 2952 002
169
Beluga-C1/C1.5 Training