Xerox DocuPrint C55 Service Manual page 291

A B
9.19 PROCESS CONTROL
1
GAMMA PWB
PL 10.2
CN401 CN301
1
2
2
3
3
TEMPERATURE/
HUMIDITY PWB
PL 8.3
3
4 HUMIDI-
1
STAT
2
4
TEMPER-
ATURE
SENSOR
5
5
6
7
DocuPrint C55/C55mp[NC60]
C D
CONN.
PWB
PL 10.4
CN103
CN304
+5 VDC A
6
1
SENSE SIGNAL
11
2
3
GND A
10
3 5
SENSOR GND
4
CN105
+5 VDC
HUMIDITY SENSE SIGNAL
GND
+5 VDC
TEMPERATURE SENSE SIGNAL
E F
PCU
PWB
PL 4.2
7
PROCESS CONTROL SEQUENCE
1. IF TONER CONCENTRATION WAS
LOW DURING PREVIOUS RUN.
ADJUST THE TONER
CONCENTRATION.
2. READ THE TEMPERATURE AND
RELATIVE HUMIDITY.
3. USE THE TEMPERATURE AND
12
HUMIDITY DATA TO ADJUST THE
TONER CONCENTRATION SET
POINTS, IF REQUIRED.
4. SLOW THE MAIN DRIVE MOTOR
AND CALIBRATE THE GAMMA
SENSOR USING THE WHITE
PATCH.
5 PRINT BLACK PATCH ON TOP OF
WHITE PATCH. USE THREE
CYCLES TO DEVELOP THREE
PATCHES EACH 50 VOLTS APART.
3
ADJUST THE BLACK DEVELOPER
BIAS.
1
6. PRINT THREE CYAN PATCHES.
CHANGE DEVELOPER BIAS BY 50 V
FOR EACH PATCH.. ADJUST CYAN
2
DEVELOPER BIAS. IF OUT OF
RANGE, PRINT AND MEASURE
ADDITIONAL CYAN PATCHES AND
READJUST.
4
7. REPEAT STEP 6 WITH MAGENTA
AND YELLOW.
5
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