Repair Analysis Procedures
Phaser® 3500 Laser Printer Service Manual
2-18
Power Supply Troubleshooting
1. Check the voltage at the AC wall outlet, there should be approximately 110 VAC (or 220
VAC if the printer is a 220 V model) at the AC wall outlet?
2. Check the power cord for defects, damage, or a loose connection.
3. Check the AC switch harness for continuity.
4. Verify the Power Supply is operating correctly.
Taking Voltage Measurements
To locate connectors or test points, refer to Wiring Data on page 7-1 for more information.
Unless otherwise specified, the following voltage tolerances are used within this section
Stated Measured
+3.3 VDC +3.135 to +3.465 VDC
+5.0 VDC +4.75 to +5.25 VDC
+24.0 VDC +21.6 to +26.4 VDC
0.0 VDC Less than +0.5 VDC
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