Xerox WorkCentre 5790 Series Service Manual page 67

01D +3.3V Distribution RAP
Use this RAP to identify +3.3V distribution problems.
NOTE: Short circuit or overload of +3.3V or +5V supply will result in all outputs off, except
+3.3VSB (standby).
Procedure
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to GP 14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Refer to Figure 1 and Figure 2. Go to the appropriate component in the list that follows that has
a suspect +3.3V supply. Check the wiring,
• ROS, PL 6.10 Item 4.
– Flag 1, P/J18, PJ120.
• Paper path module components, waste toner door switch,
interlock, PL 7.30 Item 3.
– Flag 8, P/J7.
– Flag 5, P/J27.
• Bypass tray width sensor and bypass empty sensor,
– Flag 6, P/J10.
– Flag 5, P/J27.
• Paper path module components (35-55 ppm); IOT exit sensor,
sensor, PL 8.22 Item 4, wait sensor,
Paper path module components (65-90 ppm); IOT exit sensor,
sensor, PL 8.20 Item 4, wait sensor,
– Flag 7, P/J5.
– Flag 5, P/J27.
• Power distribution PWB, PL 3.24 Item
– Flag 9, P/J25
• Single board controller PWB, PL 3.24 Item
– Flag 10, P/J137, P/J106.
– Flag 9, P/J25, P/J131.
• DADH PWB, PL 5.10 Item 5.
– Flag 11, P/J132, PJ152, P/J188.
– Flag 9, P/J25, P/J131.
• UI control PWB, PL 2.10 Item 11.
– Flag 12, P/J133, P/J130
• Scanner PWB, W/TAG 150. PL 14.15 Item
– Flag 13, P/J135, P/J920.
– Flag 13, P/J136, P/J920.
– Flag 9, P/J25, P/J131.
• CCD PWB, W/O TAG 150. PL 14.25 Item
– Flag 13, P/J135, P/J450.
– Flag 9, P/J25, P/J131.
Xerox® WorkCentre® 5790 Family
WARNING
GP 7.
PL 9.10 Item 6, left hand door
PL 7.30.
PL 10.11 Item
PL 8.15 Item 3, registration sensor, PL 8.15 Item
PL 10.11 Item
PL 8.15 Item 3, registration sensor, PL 8.17 Item
5.
3.
4.
19.
• Riser PWB, PL 3.22 Item
– Flag 14, P/J138, P/J155, P/J157.
– Flag 9, P/J25, P/J131.
• Embedded fax PWB,
– Flag 14, P/J138, P/J157, P/J155.
– Flag 9, P/J25, P/J131.
13, duplex
3.
13, duplex
3.
May 2013
2-35
3.
PL 20.10 Item 4.
Status Indicator RAPs
01D