09/2007
6-3
Phaser 8860/8860MFP Service Manual
System Power On Process
Diagnostics
Initial Issue
System Power On Process
Use
Table 1
and the Mechanical Engine Initialization diagram,
Figure 1
and
Figure 2
, to trou-
bleshoot failures that occur during the power-on sequence.
Table 1
provides typical timing of
mechanical events that occur in the 8860MFP relative to power-on, assuming the system is
cold and was shutdown properly. For the 8860, these figures are slightly different, but the
sequence, exclusive of the Scanner initialization, remains the same. Timing may also vary
dependent on the Printhead position and environmental conditions.
NOTE:
Warm systems reach “Ready To Print” in about 2 minutes while cold systems require
up to 12 minutes. Only cold systems require Steps 18-21 below for cleaning the Printhead. A
cold system is defined by the Printhead temperature being below 95 - 100
°
C
System Power On Sequence
The following lists the chain of events that occur when you turn on the system. You can follow
this list as one means of determining if the system is operating correctly. The exact chain of
events depends upon the last power down condition and where the Printhead is positioned,
this is stored in non-volatile RAM. The Electronics Troubleshooting Checklist is the primary ref-
erence for troubleshooting power-up problems.
1.
Power supply senses AC line voltage conditions (110 VAC or 220 VAC) and enables DC
voltages. If an overload occurs, the system turns off the high voltage DC supplies, causing
a “blink” effect on the Control Panel LEDs.
2.
BIST test flashes the PE LED very briefly at a fast rate until the end of the next test.
3.
The Boot loader performs CPU initialization and RAM test. It then sends the boot loader
version to the serial port.
4.
Power-On Self Test (POST) initializes the Control Panel. The Control Panel LED turns
red, green, orange, and then off. The Control Panel LCD then goes black and then clear.
The POST version displays on the LCD and waits two seconds. During this time the oper-
ator can press the Back button to bypass the remaining POST test.
5.
Low level Power-On Self Test (POST) diagnostics are performed. The Control Panel dis-
plays status messages as each sub-test is performed. This test takes about 8 seconds. All
LEDs are off during the test.
If POST diagnostics pass, the Control Panel displays the Xerox logo and turns on the
green LED.
If the test detects an error, the error message displays on the LCD and the system flashes
the LEDs with a repeating error code pattern.
6.
The VxWorks operating system is initialized and engine code is started. This takes about
15 seconds. The Xerox logo is displayed.
7.
Print Engine Self Test (PEST) diagnostics are then performed. These test the heaters,
clutches, motors and solenoids. As each clutch is tested, you hear clicking with four high
tones as each motor is tested. This test takes about 30 seconds.
8.
The system now runs the mechanical initialization. The exact sequence depends on the
initial position of the Printhead and wiper assembly.
Table 1 System Power On Sequence
Power On Event
Elapsed Time
(mm:ss)
1.
Set power switch to ON.
00:00
2.
BIST test flashes PS LED 1 time and the PE LED quickly 4 times.
00:00
3.
Control Panel LED flashes red-green-yellow-orange-off.
00:03
4.
Scrolling “Xerox” logo.
5.
Control Panel displays “Phaser Power on Self Test”.
00:04
6.
Control Panel displays “Test Complete-Initializing....”.
00:11
7.
Power supply fan starts turning.
00:20
8.
Control Panel displays “Initializing Complete”
00:23
9.
Control Panel displays XEROX logo & LED turns green.
00:24
10. Print Engine Self Tests (PEST) begin with solenoids and clutches
00:26
11. Print Engine Self Test complete.
00:48
12. Scanner initializes.
00:30
13. Four high tones from motor testing
00:49
14. Mechanical initialization begins.
01:08
15. Back light on Control Panel display turns on.
01:15
16. Control Panel displays “Warming Up”.
01:24
17. Control Panel displays “Warming Up 5%”.
01:51
18. Mechanical initialization ends.
02:04
19. Control Panel displays “Warming Up xx%” (increasing toward 100%).
02:16
20. When the Control Panel displays “Warming Up 60%”, cleaning starts ---
Cold systems only.
07:34
21. Cleaning ends --- Cold systems only.
10:16
22. Control Panel displays “Printing page 1 of 4” --- Cold systems only.
11:12
23. Cleaning page exits --- Cold systems only.
11:48
24. Startup page exits (if enabled)
11:58
25. Control Panel displays “Ready To Print”.
11:59
Summary of Contents for Phaser 8860
Page 1: ...705P01205 September 2007 Phaser 8860 8860MFP Service Documentation...
Page 4: ...09 2007 iv Phaser 8860 8860MFP Service Manual Initial Issue Introduction...
Page 28: ...09 2007 1 2 Phaser 8860 8860MFP Service Manual Initial Issue Service Call Procedures...
Page 34: ...09 2007 2 2 Phaser 8860 8860MFP Service Manual Initial Issue Error Messages and Codes...
Page 94: ...09 2007 3 2 Phaser 8860 8860MFP Service Manual Initial Issue Image Quality...
Page 126: ...09 2007 4 2 Phaser 8860 8860MFP Service Manual Initial Issue Repairs and Adjustments...
Page 208: ...09 2007 5 2 Phaser 8860 8860MFP Service Manual Initial Issue Parts List...
Page 222: ...09 2007 6 2 Phaser 8860 8860MFP Service Manual Initial Issue Diagnostics...
Page 274: ...09 2007 7 2 Phaser 8860 8860MFP Service Manual Initial Issue Wiring Data...
Page 294: ...09 2007 8 2 Phaser 8860 8860MFP Service Manual Initial Issue Theory of Operation...
