Xerox Phaser 840, Руководство по обслуживанию

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250 Phaser 840/850/860/8200 Color Printer - Service Manual
On-site Electronics Troubleshooting Checklist
Phaser 840/850
NAME: OUT REQUEST ID: DATE:
COMPANY (if no OUT REQUEST ID): PHONE:
Use the checklist below, along with the provided electronics troubleshooting guide, when repairing a
Phaser 840 or 850 printer that has experienced a failure related to electronic circuit boards. For each step,
fill in all blanks that apply and return the filled-out checklist with any circuit board that is returned to the
factory (such as the main board or the power supply).
Before troubleshooting any printer hardware failure, be sure to disconnect the printer from the network or
host computer. The hardware ports on the main board are very reliable and almost never fail. If the printer
works fine when completely isolated, it is most likely a customer setup problem.
To obtain copies of this checklist and troubleshooting guide, refer to Service Bulletin #437.
Warning
When removing the power supply, always unplug the power cord
first.
Note
Always use static electricity precautions when handling the
printer's circuit boards.
ACTION: LOOK FOR: WHAT NEXT:
Verify Failure
1.
Power cycle printer 3
times and verify failure.
Briefly describe the
failure:
In addition, please check
one of the below:
__Hang
__Reset/Reboot
__Print Quality
__Other
Check all of the below:
1A.
Status of front panel and
rear LED's as on, off,
blinking
If the PS LED (left) is
blinking and the PE LED
(right) is not, then it is
flashing a POST error.
Interpret the repeating pat-
tern of long and short
pulses;
long = 5 and short = 1.
Add them together and
refer to the Service Quick
Reference Guide (SQRG)
for details.
If flashing POST error,
record here:
POST error
1B.
Status of front panel
1C. Status of cooling fan (rear
left corner of printer)
Record all of the below:
1A.
Record status of all
LED's:
Front panel Error LED
ON OFF
Front panel Ready LED ON
OFF
Rear PS LED
ON OFF Blinking
Rear PE LED
ON OFF Blinking
1B. Record status of front
panel (blank, Tek logo,
error, etc.):
1C.
Record status of cooling
fan.
OFF High Speed Low
Speed
Go to Action 2.