Printronix P4280 - Page 29

3–3Troubleshooting
Instruction NoYesIndication
4. Disconnect cable assembly
W1, CCB/Mech Driver, from
connector J2 on the CCB and
connector J6 on the Mech
Driver board.
—
Step 5.
—
5. Power up the printer.
Card cage fan comes on. Replace the
common controller
PCBA (page
5–46).
Reattach cable
assembly W1,
CCB/Mech Driver,
to connector J2 on
the CCB and
connector J6 on
the Mech Driver
board, and go to
step 6.
6. Pull the Mech Driver board
up so that it clears the bottom
edge connectors.
—
Step 7.
7. Disconnect +5Volt connector
PS5 (cable assembly W2)
from the power supply board
and put a 1K Ohm resistor
between pins 1 and 2.
—
Step 8.
8. Remove the Mech. Driver
board.
—
Step 9.
9. Power up the printer. Check
for +48 V at power supply
cable W3 connector PS: pin
8 = +48 V, pin 15 = ground.
(See Appendix D for cable
interconnections.)
+ 48 Volts at pin 8. Replace the
mechanism driver
PCBA (page
5–48) and go to
step 10.
Replace the
power supply
PCBA (page
5–50) and go to
step 10.
10. Cycle power and check for
the fault message.
“48 Volt Failed * ” message. Replace cable
assembly W2,
+5V. (See
Appendix D.) Go
to step 11.
Return printer to
normal operation.
11. Cycle power and check for
the fault message.
“48 Volt Failed * ” message. Replace cable
assembly W3, Hi
Voltage. (See
Appendix D.) Go
to step 12.
Return printer to
normal operation.
12. Cycle power and check for
the fault message.
“48 Volt Failed * ” message. Replace cable
assembly W6,
P4980A Main
Wire Harness.
(See Appendix D.)
Return printer to
normal operation.