12.2 Ph Unit Mechanical Adjustment; Skew Adjustment - Konica Minolta magicolor 7450 Service Manual

Field Service Ver. 1.0 May 2006

12.2 PH Unit Mechanical Adjustment

12.2.1

Skew Adjustment

This adjustment must be made in the following case:
• When PH Unit is replaced.
1. Turn on the Main Power Switch.
2. Select the items described below to display [CAUTION STATUS] on the control panel.
[SERVICE MENU] → [DIAGNOSIS MENU] → [FUNCTION MENU] → [PH SKEW ADJ]
→ [CAUTION STATUS]
3. Check that Bit number 11 "Color Shift Test Pattern failure", and Bit number 12 "Color
Shift Adjust failure" on [CAUTION STATUS 1] did not occur.
See P.168
4. Set A3 or 11 x 17 paper on the Tray.
(The paper to be set depends on the setting on [SYS DEFAULT MENU] → [PAPER] →
[UNIT OF MEASURE].)
5. Select [SERVICE MENU] → [DIAGNOSIS MENU] → [FUNCTION MENU] → [PH
SKEW ADJ] → [ADJUSTMENT PRINT] and output the test pattern.
6. Display [SERVICE MENU]] → [DIAGNOSIS MENU] → [FUNCTION MENU] → [PH
SKEW ADJ] → [PH REGIST VALUE] and check if the Regist Value is within the specifi-
cation.
Specification: within ± 4
PH REGIST VALUE
Y = -5
M = 3
C = -1
12. Mechanical adjustment
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