Xerox ColorQube 9303 Series - Page 54

February 2013
2-30
ColorQube® 9303 Family
01H
Status Indicator RAPs
01H +24V Distribution RAP
Use this RAP to diagnose +24V supply and distribution faults.
NOTE: This supply is not to be confused with the +17V supply, which is shown in WD 1.5.
NOTE: Refer to RAP 12A-171 to diagnose +24V supply and distribution faults on the HVF.
Refer to RAP 12D-110 to diagnose +24V supply and distribution faults on the LCSS.
Procedure
WARNING
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.
CAUTION
To avoid equipment damage, do not disconnect or connect PJ’s while the machine is switched
on.
NOTE: To view the +24V supply generation, refer to WD 1.3.
Check the PEST fault history, dC123. There are hard PEST faults shown.
YN
Check the LEDs on top of the power supply unit, Figure 1. The yellow LED is lit.
YN
The green LED is lit.
YN
Go to the 01C 3.3V Distribution RAP
Check for short circuits. Refer to the 01-525-00 +24V, +/-12V, +5V Short Circuit and
Overload RAP, +24V short circuit check.
Switch off the machine, GP 14. Disconnect the following connectors on the power
supply unit to isolate the PWB’s that follow:
• PJDC1 to isolate the IME controller PWB.
• PJDC3 to isolate the drum driver PWB and media path driver PWB.
• PJDC4 to isolate the power distribution PWB and HDD.
A short circuit exists.
YN
Either the power supply unit is faulty or there is a short circuit. Refer to WD 9.4
and WD 1.4. Measure the voltage at pin 27 of PJ902 on the drum driver PWB.
The voltage should be greater than +2.5V, indicating the drum driver PWB is
enabling the +24V, +12V, -12V and +5V supplies in the power supply unit.
The
voltage is greater than +2.5V.
YN
Check the condition of the drum driver power supply interface cable
between PJDC2 on the power supply unit and PJ902 on the drum driver
PWB. It should be correctly and securely connected at each end, and
should be undamaged. This cable carries power control signals from and
to the power supply unit.
The cable is good.
YN
Install a new drum driver power supply interface cable, PL 1.15 Item
10, as necessary.
Switch off the machine, GP 14. Check pin 27 of PJ902 on the drum driver
PWB.
Pin 27 is short circuit to ground.
YN
Install a new drum driver PWB, PL 1.15 Item 4.
Repair the wiring, REP 1.1.
Install a new power supply unit, PL 1.15 Item 2.
Repair the wiring, REP 1.1. Install new components as necessary.
Check that the +24V is within tolerance, +24.5V +/- 5%, (+23.275V to +25.725V), at JDC1
pin 11. Refer to WD 1.4.
The +24V is good.
YN
Install a new power supply unit, PL 1.15 Item 2.
Determine which PWB has the supply fault, go to PWB Checks.
Perform the RAP(s) given by the hard PEST fault code(s), then return to this RAP.
PWB Checks
Check the PWB’s below to determine which PWB has the distribution fault. Follow the distribu-
tion back to the supply. Repair the wiring, REP 1.1 or install a new PWB or power supply unit,
PL 1.15 Item 2 as necessary. Refer to GP 15 for the location and function of the LED’s on the
PWB’s.
NOTE: Many PWB’s have distribution fuses.
• IME Controller PWB
• Marking Unit Driver PWB
• Solenoid Patch PWB
• Power Distribution PWB
• Scanner PWB
• DADH PWB
• Media Path Driver PWB
• 3 Tray Module PWB
• Drum Driver PWB
• Tray 5 Control PWB
• LCSS PWB
• HVF PWB
• BM PWB (Booklet Maker)
• Tri-folder PWB
• Inserter PWB
• OCT PWB
• Cleaning Unit
IME Controller PWB
• To view the +24V distribution from the power supply unit, refer to WD 1.4.
• For +24V faults on the IME controller PWB, refer to:
– WD 9.6
– WD 9.7
A
A
B
B
C
C
D
D
E
E