Pwm Adjustment - Panasonic DP-1820P Service Manual

3. PWM Adjustment

1) Ensure that Ledger / A3 Size Paper is loaded in one of the Trays, and pull out the remaining trays
(including the bypass tray) to disable them.
2) Press "FUNCTION", "ORIGINAL SIZE", and "3" keys sequentially to enter the Service Mode.
3) Press the "8" key to enter the F8 Mode (Service Adjustment).
4) Press the "START" key.
5) Press the "1", "8" and "SET" keys sequentially to enter the F8-18 "C18 PRT PWM ADJ. PTN.".
6) Press the "START" key to begin the LSU PWM Pattern Printing.
Sample:
4 gray patches are visible in the illustration, the value of the uppermost patch position is "+2" in
our example.
7) Press the "STOP" key.
8) Press the "6" and the "START" keys to enter the F6 Mode (Adjust Parameters).
9) Select "39 LSU Unit PWM ADJUST".
10) Press "SET" button and enter the value of the gray patch, as established in Step (6).
4. LSU Adjustment
Refer to 3.9.
Ver. 1.2
(-5)
(0)
+2
(+5)
In our sample, 4 patches
are visible.
Test Pattern
114
DP-1520P/1820P/1820E
SEP 2004