service bulletin

1. SERVICE BULLETIN
P R O D U CT: Phaser 7800 (03)
T7910-04-16
SUBJECT: PrinterDoes Not Turn On or
ControlPanelTouch Screen isBlank
OPERATIONAL GROUPS: All
PROBLE M
• The printerdoes not turn on
• ControlPanelTouch Screen isblank (dark)
• The green LED on the controlpanel isnot lit.Ifthe
green LED ison,then the issue isa differentone not
addressed inthisBulletin.
Thisproblem can be intermittent.
CAUSE
The 1.0 volt dc power supply on the Image Processor
board,FRU PN 960K72100 isnot able to turn on.
SOLUTION
Remove capacitorC 824 (indicated by yellow arrow) from
the Image Processor Board by cutting the leads with
diagonal cutters.Capacitor C 824 is shown in Figures 1
and 2. Figure 3 shows the IP board with the capacitor
removed.
Follow appropriateESD procedures to avoid damage to the
IPBoard.
Verify that the printer powers up successfully with a
couple of power on cycles spaced approximately 10
minutes apart.
Figure 1: Phaser 7800 IPBoard wide view
BulletinContact:James Brossard Intelnet: 8*875-3664 e-mail: james.brossard@xerox.com
SLDS Code: C94 Date:4/13/2012 page 1 of 2

2. SERVICE BULLETIN
Figure 2: IPBoard close up view
Figure 3: Close up of IPBoard afterremoval ofC 824
Complete the part’sInventory ControlTag for any part(s)
used with the RID number clearlyindicated and include it
with each partreturned.
North America: Return replaced parts to the logistics
center named on the shipping box’s pre-printed return
shipping label.
Outside North America: Return parts as per your normal
channels.
PART INVENTORY STRATEGY
N/A
EXPIRATION: At productend-of-lifeor end-of-service.
e-mail: james.brossard@xerox.com Intelnet: 8*875-3664 BulletinContact:James Brossard
page 2 of 2 Date: 4/13/2012 SLDS Code:C94