4-30
Phaser 7500 Printer Service Manual
General Troubleshooting
Trays 3 through 5
For optional Trays 3 through 5, media size is detected by the state of five paper
size switches located at the rear of the chassis. Media size is sensed by the voltage
corresponding to the combined resistance of SW1 through SW4 and the state of
SW5 (On/Off). A failed or jammed switch effects the printer’s ability to accurately
detect media size or presence in the tray.
Included in the table are the expected values for voltage readings at J548-14,
J549-B11, and J549-B17 respectively. Also listed are the range of A/D converter
values. Any combination other than the ones listed result in an undetermined size.
*1 Paper size is changed in diag.
*2 System setting makes possible changing between GCO and TFX sizes
Paper Size Switch Output Values Trays 3 through 5
Paper Size
SW1 SW2 SW3 SW4 SW5
Voltage
AD
Value
No
Tray
Off Off Off Off Off 4.66±0.03 237-247
A5 SEF 5.5" x 8.5"
SEF (*1)
Off Off On Off Off 4.01±0.03 199-214
B5
SEF
Off Off On On On 3.69±0.03 184-198
8.5" x 13" SEF
Off
On
Off
On
Off
3.07±0.03
153-167
8.5" x 14" SEF
Off
On
Off
On
On
A4 SEF
Off
On
On
Off
Off
2.75±0.03
137-152
8.5" x 11" SEF
Off
On
On
Off
On
8" x 10" SEF
Off
On
On
On
On
2.44±0.03 122-136
12.6” x 19.2" SEF/
13" x 19" SEF (*1)
On Off Off Off On 2.15±0.03 107-121
SRA3 SEF/ 13” x 18"
SEF/ 2" x 18" SEF (*1)
On Off Off On On 1.83±0.03 92-106
A4
LEF
On Off On Off Off 1.52±0.03 77-91
A3
SEF
On Off On On Off 1.21±0.03 61-76
B5 LEF 7.25" x 10.5"
LEF(*1)
On On Off Off On 0.91±0.03 46-60
8K SEF (*2)
On
On
Off
On
Off
0.60±0.03
31-45
B4
SEF
On On Off On On
8.5" x 11" LEF
On
On
On
Off
Off
0.30±0.03
16-30
16K LEF (*2)/ 7.25" x
10.5" LEF (*1)
On On On Off On
11"
x
17"
SEF
On On On On On 0.00±0.03
0-15
Summary of Contents for PHASER 7500
Page 1: ...Phaser 7500 Color Printer Phaser 7500 Service Manual Xerox Internal Use Only ...
Page 2: ......
Page 60: ...1 30 Phaser 7500 Printer Service Manual General Information ...
Page 448: ...3 310 Phaser 7500 Printer Service Manual Error Messages and Codes ...
Page 484: ...4 36 Phaser 7500 Printer Service Manual General Troubleshooting ...
Page 544: ...5 60 Phaser 7500 Printer Service Manual Print Quality Troubleshooting ...
Page 545: ...6 Chapter Adjustments and Calibrations In this chapter Adjustments Calibrations ...
Page 554: ...6 10 Phaser 7500 Printer Service Manual Adjustments and Calibrations ...
Page 562: ...7 8 Phaser 7500 Printer Service Manual Cleaning and Maintenance ...
Page 900: ...9 118 Phaser 7500 Printer Service Manual Parts List ...
Page 958: ...10 58 Phaser 7500 Printer Service Manual Plug Jack and Wiring Diagrams ...
Page 980: ...11 22 Phaser 7500 Printer Service Manual Reference ...
Page 990: ...I 10 Phaser 7500 Printer Service Manual Index ...
Page 991: ......