February 2013
2-28
ColorQube® 9303 Family
01E, 01F
Status Indicator RAPs
Figure 1 Component location
01F -12V Distribution RAP
Use this RAP to diagnose -12V supply and distribution faults.
NOTE: Refer to RAP 12A-171 to diagnose -12V supply and distribution faults on the HVF.
Refer to RAP 12D-110 to diagnose -12V 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 -12V supply generation, refer to WD 1.3.
The yellow LED on top of the power supply unit, Figure 1, indicates that the +5V supply is
available in the power supply unit. The +5V and +12V supplies are generated from the -12V/
+24V supply in the power supply unit.
The yellow LED is lit.
YN
Go to the 01-540-00, 01-544-00 +24V, +/-12V, +5V Failure RAP.
Check that the -12V is within tolerance, -12V +/- 5% at JDC1 pin 12. The -12V is good.
YN
Check for short circuits. Refer to the 01-525-00 +24V, +\-12V, +5V Short Circuit and Over-
load RAP, -12V short circuit check.
NOTE: The -12V supply is protected via a foldback circuit. A short circuit will result in 0V
output, but the power supply will not switch off. Removing the short will restore -12V out
-
put from the power supply.
If a short circuit is found, disconnect connectors on the power supply unit to isolate the
PWB’s that follow:
• PJDC1 to isolate the IME controller PWB.
• PJDC3 to isolate drum driver PWB and media path driver PWB.
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.
IME Controller PWB
• To view the -12V distribution from the power supply unit, refer to WD 1.4.
• For -12V faults on the IME controller PWB, refer to:
– WD 9.5
– WD 9.6
– WD 9.7
• The components that follow are driven from -12V from the IME controller PWB.
– Print heads, PL 91.25 Item 2, PL 91.25 Item 2.
– Quad wave amp PWB PL 92.10 Item 3.
• Repair the wiring as necessary, REP 1.1.
• If necessary, install a new IME controller PWB, PL 92.10 Item 1, or one of the items in the
list above.
Yellow LED
Power supply unit
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