Section 2
2-4
© Copyright 2009 GBC. All rights reserved.
Advanced Punch Service Manual
2.3 RAP DC Power - No Indication of 24V DC
2.3.1 Description
This repair procedure explains the steps to follow when troubleshooting an DC
problem.
2.3.2 Initial Actions
Ensure the Communication Cable is securely connected.
Ensure the AC Power at the J1 AC Power Connection. If no AC Power, go to the
AC RAP.
2.3.3 Procedure
1. Check for line voltage at the J2 connection at the main control board. There is
AC Power.
Yes : Go to the next step
No : Replace the Main Control Board
2. Check for line voltage at the Power Supply
Yes : Go to the next step
No: Replace the Cable to the Power Supply Board
3. Measure for 5V DC at pin 3 of the Communication Cable. There is 5V DC at
the connection.
Yes : Go to the next step
No : Replace the Communication Cable
4. Measure for 5V DC at J13 of the Main Control Board. There is 5V DC at the
connection.
Yes : Go to the next step
No : Replace the Main Control Board
5. Measure for 5V DC at the other end of J13. There is 5V DC at the connection.
Yes : Go to the next step
No : Replace the J13 Cable
6. Inspect for the LED of the Power Supply Unit The LED is illuminated.
Yes: Go to the next step
No : Replace the Power Supply Unit
7. Inspect for 24V DC at the Power Supply Unit There is 24V DC at the PS.
Yes: Go to the next step
No : Replace the Power Supply Unit
8. Inspect for 24V DC at J3 of the Main Control Board. There is 24V DC at J3.
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