Field Service Ver. 1.0 May 2006
11. SERVICE MENU
161
magicolor 7450
Adjustment / Setting
IDC REGIST SENSOR1
• Shows the IDC bare surface output reading taken last (in 0.01 V
increments).
• It should normally be around 4.3 V.
• The output range is 0 V to 9.99 V.
• “Reading taken last” means: Latest toner density
• Relevant Components: IDC Sensor, Transfer Belt Unit
IDC REGIST SENSOR2
TCR SENSOR C
• Shows the T/C ratio (in 0.01 % increments).
• Standard value: 8
±
2 %
• Relevant Components: PH Unit, TCR Sensor K
TCR SENSOR M
TCR SENSOR Y
TCR SENSOR K
• Shows the T/C ratio (in 0.01 % increments).
• Standard value: 7
±
2 %
• Relevant Components: PH Unit, TCR Sensor K
VG VOLT C
• Shows the grid voltage value of each color of toner when an
image is produced.
• Standard values: Around 500 V
• A correction is made to make the image lighter when the numeric
value is greater.
• A correction is made to make the image darker when the numeric
value is smaller.
• Relevant Components: Imaging Unit, High Voltage Unit (Develop-
ing Bias)
VG VOLT M
VG VOLT Y
VG VOLT K
VB VOLT C
• Shows the developing bias value of each color of toner when an
image is produced.
• Standard values: Around 400 V
• A correction is made to make the image lighter when the numeric
value is greater.
• A correction is made to make the image darker when the numeric
value is smaller.
• Relevant Components: Imaging Unit, High Voltage Unit (Develop-
ing Bias)
VB VOLT M
VB VOLT Y
VB VOLT K
IDC BASE REFLECTION1
• Shows the IDC intensity adjustment value.
• It should normally be around 40 and can range from 0 to 255.
• The value becomes greater as the Transfer Belt Unit has been
used more.
• Relevant Components: IDC Sensor, Transfer Belt Unit
IDC BASE REFLECTION2
THICKSTOCK VG VOLT C
• Displays the Grid voltage value of each color when printing the
image on the thick paper.
• Standard values: Around 500 V
• A correction is made to make the image lighter when the numeric
value is greater.
• A correction is made to make the image darker when the numeric
value is smaller.
• Relevant Components: Imaging Unit, High Voltage Unit (Develop-
ing Bias)
THICKSTOCK VG VOLT M
THICKSTOCK VG VOLT Y
THICKSTOCK VG VOLT K
Element Data Name
Description
Summary of Contents for magicolor 7450
Page 1: ...SERVICE MANUAL 2006 05 2006 05 Ver 1 0 Ver 1 0 FIELD SERVICE magicolor 7450 magicolor 7450 ...
Page 3: ...ii Blank Page ...
Page 26: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Main Unit magicolor 7450 magicolor 7450 ...
Page 43: ...2 Product specifications Field Service Ver 1 0 May 2006 6 magicolor 7450 General Blank Page ...
Page 288: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Lower Feeder Unit ...
Page 317: ...3 Other Field Service Ver 1 0 May 2006 26 Lower Feeder Unit Maintenance Blank Page ...
Page 328: ...SERVICE MANUAL 2006 05 Ver 1 0 FIELD SERVICE Duplex Option ...
Page 333: ...1 Product specifications Field Service Ver 1 0 May 2006 2 Duplex Option General Blank Page ...
Page 345: ...6 Jam Display Field Service Ver 1 0 May 2006 14 Duplex Option Troubleshooting Blank Page ...