Xerox Phaser 7760 Service Manual page 417

OF 1-4 AC Input Power
There is an AC input power failure between power cord and AC Drive PWB.
Initial Actions
• Entry to this RAP is from Call Flow.
• Check that the required voltage is available at the customer power outlet (approx. 110
VAC or 220 VAC). Inform customer if power is not available.
Procedure
AC Line Voltage is measured between the GFI Breaker P/J72-2 (+) and P/J72-1 (-)
1) (refer to Section 7, HVPS, +24V LVPS T10 Plug/Jack Locations -
Y N
Check the Power Cord for an open circuit. If no problems are found, replace the GFI
Breaker (PL 9.2).
Measure voltage between P/J39-1 (ACH/BLK) and P/J39-3 (ACN/WHT) on the AC Drive PWB
(Figure 1) (refer to Section 7, AC Drive PWB, Noise Filter PWB Plug/Jack Locations -
18). AC Line Voltage is measured.
Y N
Check the connections between the GFI Breaker and the Noise Filter PWB.
A
Revised
Phaser 7760 Color Laser Printer
A
If the connections are good, push the small button to reset the GFI Breaker.
If it is not tripped, replace the Noise Filter PWB
Measure voltage between J57 (ACH) on the Main Power Switch and J40 (ACN/WHT) on the
AC Drive PWB
Y N
Repair the open circuit between the Main Power Switch and the AC Drive PWB.
Hold the Main Power Switch in the on position while measuring voltage between J69 (ACH) on
the Main Power Switch and J39-1 (ACN/WHT) on the AC Drive PWB
Voltage is measured.
(Figure
Y N
Figure 12).
Replace the Main Power Switch
Hold the Main Power Switch in the on position while measuring voltage between P/J41 (ACH/
BLK) and P/J40 (ACN/WHT) on the AC Drive PWB
Y N
Repair the open circuit between the AC Drive PWB
Figure
(PL 10.2).
AC input power to the AC Drive PWB is good.
Figure 1 OF 1-4 Input Power
January 2010
2-381
(PL 9.2).
(Figure 1). AC Line Voltage is measured.
(PL 10.2).
(Figure
(Figure 1). AC Line
1). AC Line Voltage is measured.
(PL 9.2) and the Main Power Switch
Status Indicator RAP's
OF 1-4