Xerox Phaser 840 Service Manual page 9

Diagnostics, Adjustments and NVRAM
Front Panel Shortcuts..........................................................................................4 - 119
Hidden Service Menu .................................................................................4 - 121
Built-in Diagnostics (Phaser 860 Only)..............................................................4 - 122
Check Menu Value Keys and Descriptions (Phaser 860 only)...........................4 - 126
Check Value Menu Parameters ..................................................................4 - 135
Adjustments ........................................................................................................4 - 136
Printing service test prints ..........................................................................4 - 136
Printing the Configuration Page .................................................................4 - 136
Selecting Duplex (2-sided) Oil Chase ........................................................4 - 137
Selecting Envelope Oil Chase ....................................................................4 - 137
Center Image...............................................................................................4 - 137
Locking the printhead .................................................................................4 - 138
Process belt tension adjustment ..................................................................4 - 139
Exit roller drive belt tension adjustment.....................................................4 - 140
Y-axis belt tension adjustment (Phaser 840 printer)...................................4 - 142
Y-axis belts tension adjustment (Phaser 850/860 printer)..........................4 - 144
Printhead-to-drum spacing adjustment (Phaser 840 Printer Only).............4 - 146
X-axis scale adjustment ..............................................................................4 - 149
Cap/wipe/purge assembly belt adjustments................................................4 - 150
Drum position encoder gap.........................................................................4 - 152
Transfix roller pressure spring adjustment .................................................4 - 154
Vacuum check (Phaser 840/850 Only) ...............................................................4 - 155
Resetting NVRAM .............................................................................................4 - 156
Test Prints
1: X-axis motion .........................................................................................5 - 160
2: Weak/missing jet ....................................................................................5 - 161
3: Color Bands, RGBK Dither....................................................................5 - 161
4: Reverse Text ...........................................................................................5 - 162
5: Big Bands Hand-fed OHP ......................................................................5 - 162
6: 66% Gray, dot size uniformity ...............................................................5 - 163
7: Manuf. Dot position (scanner)................................................................5 - 164
8: YMCKRGB Solid Fills ..........................................................................5 - 164
9: Drum Seal ..............................................................................................5 - 165
10: Manuf. paper path.................................................................................5 - 165
11: Head-to-Drum Gap ...............................................................................5 - 166
12.: Manuf x-axis (scanner)........................................................................5 - 166
13: Black Solid Fill.....................................................................................5 - 167
14: Red Solid Fill........................................................................................5 - 167
15: Green Solid Fill ....................................................................................5 - 168
16: Blue Solid Fill.......................................................................................5 - 168
17: Cyan Solid Fill......................................................................................5 - 169
18: Magenta Solid Fill ................................................................................5 - 169
19: Yellow Solid Fill ..................................................................................5 - 170
20: OHP Color Bands .................................................................................5 - 170
21: Primary Solid Fills 10x.........................................................................5 - 171
4 - 119
5 - 159
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