Xerox DocuColor 2240, Service Manual

Page: 950 / 1489

09/03
4-167
DC 3535/2240/1632, WC M24
ADJ 9.3, ADJ 9.4
Repairs and Adjustments Initial issue
ADJ 9.3 TRC Control/Toner Density Setup (dC922)
Purpose
To check the output of ATC Sensor and to determine if TC Control performed normally.
Allows manual adjustment of TC if control is not functioning.
Check
1. Connect the PWS to the machine and enter Diagnostic Mode (refer to Entering Diagnostic
Mode using the PWS ).
2. Under the Adjustments tab, select Max Setup .
3. Select the TRC Control tab.
4. Load letter size paper (8.5 x 11 or A4) into Tray 1.
5. Select the Start button. The machine will read the output of the ATC Sensor and display
the results in the row labeled ATC Mean Detected Value . If the routine is unable to read
the ATC Sensor correctly, this fact will be displayed in the row labeled ATC Sensor Fail
Determination .
6. If the row labeled ATC Sensor Fail Determination displays OK for all colors, continue
with the check. If any color is not OK, go to the appropriate RAP ( 9-380 for yellow, 9-381
for magenta, 9-382 for cyan, or 9-383 for black) to fix the problem before continuing with
this procedure.
7. Compare the data in the row labeled ATC Mean Detected Value with the data in the row
labeled ATC Control Environment Correction Standard . If the measured value for any
color is more than 50 bits higher or lower than the target (correction standard) value, per-
form the Adjustment.
8. If the Check is OK, proceed to ADJ 9.4 , ADC Output Check.
Adjustment
The Tone Judge window in the upper right portion of the screen shows the result of the ATC
Sensor read. Perform the following steps to adjust the toner density.
1. Select Run . The control logic will automatically tone up or tone down each color per the
display.
2. When the tone up/down cycle is complete, select Start to re-run the check.
NOTE: It is not necessary to repeat the tone up/down procedure until the match is exact.
3. Repeat steps 2 and 3 until the ATC Mean Detected Value is within 50 bits of the ATC
Control Environment Correction Standard for all colors.
4. Proceed to ADJ 9.4 , ADC Output Check.
ADJ 9.4 ADC Output Check (dC934)
Purpose
• To check the following functions
• ADC (2 gradation) patch for Potential Control on the IBT
• ADC Sensor output
• Laser Diode light output
Check
1. Connect the PWS to the machine and enter Diagnostic Mode (refer to Entering Diagnostic
Mode using the PWS ).
2. Under the Adjustments tab, select Max Setup .
3. Select the ADC AGC Setup tab.
4. Select the Start button. The machine will read the output of the ADC Sensor, The Laser
Diode, and Developer bias, and display the results on the screen.
5. Check for unsatisfactory results:
• If a fault code is declared, go to the RAP for that code. Resolve the problem, then
repeat the Check.
• If ADC Shutter Fail is NG go to the 9-654 RAP and troubleshoot the shutter sole-
noid circuits
• If ADC Sensor Fail is NG go to the 9-654 RAP and troubleshoot the sensor circuits.