Xerox WorkCentre 5790 Series Service Manual page 538

A D
Go to Flag 6 +24V is available at P/J601
Y N
Go to the 11-300-171, 11-302-171, 11-303-171
The +24V and +5V supplies are good. Go to
The +24V and +5V supplies are good. Go to
HVF Control PWB and BM PWB LEDs
Figure 1 shows the LED s on the HVF PWB. These are:
• LED 1 - red. Not used.
• LED 2 - red. Not used.
• LED 3 - red, flashing. This indicates the functioning of the CPU. When flashing at 2Hz,
(every 1/2 second), the software is running normally. When flashing at about 1/4Hz,
(every 4 seconds), this indicates that the software is encountering a code problem and a
possible software upgrade is needed. If this LED is OFF, the CPU does not function and a
new HVF control PWB is needed.
• LED 4 - red. Not used.
• LED 5 - red, toggling. This changes state whenever the paper is accelerated to 1,300 m/s.
It is only used for paper that is longer than 220mm.
• LED 6 - red, steady. When this is ON, a paper jam has been detected. It remains ON until
the HVF successfully initializes. In all other cases this LED is OFF.
• LED 7 - red. This LED is used during the machine production and is connected with the
activity of the stacker nearly full sensor.
• LED 8 - red, steady. This indicates that the HVF top cover, front door and docking inter-
locks are all closed and +24V is available at the HVF module.
• LED 9 - red, steady. This indicates that the +5V supply is present in the HVF module.
Figure 1 LEDs on the HVF control PWB
Status Indicator RAPs
11A-171
between pins 4 and 6.
Docking and Interlocks RAP.
SCP 6 Final actions.
SCP 6 Final actions.
Figure 2 shows the LEDs on the BM PWB. These are:
• LED 1 - red, steady. This indicates a fault or other abnormal status.
• LED 2 - yellow, flashing at about 1Hz. This indicates that the software is operating in nor-
mal mode. In other modes, e.g., software downloading, the flashing rate is higher.
• LED 3 - orange, steady. This indicates either:
– that the tri-folder front door and top cover interlocks are closed, and +24V is avail-
able to the BM module or, if the tri-folder in not installed;
– that the interlock cheater is present in PJ553 on the BM control PWB the logic
cheater is present in PJ563 on the BM control PWB.
• LED 19 - orange, steady. This indicates that the +24V supply is within voltage and current
limits, and that the power limiting circuit has not been active for over a set time limit.
• LED 5 - blue, steady. this indicates that the +5V supply is present in the BM module.
Figure 2 LEDs on the BM PWB
May 2013
2-506 Xerox® WorkCentre® 5790 Family