Power Problems; Dead; Audio Problems; No Audio - Kurzweil PC2 Series Service Manual

Troubleshooting

Power Problems

Power Problems

Dead

1. Before opening the unit, verify the following:
2. Check the power switch, power jack and AC adapter.
3. Refer to the Interconnect Diagram. See page 5-13 for rack models or page 5-14 for
4. Refer to the Connector Board schematics and check all supply voltages.

Audio Problems

No Audio

1. Run the Scanner Diagnostics to check the volume slider operation.
2. Refer to the Interconnect Diagram. See page 5-13 for rack models or page 5-14 for
3. Check the flat ribbon cable from J412 on the Engine Board to J302 on the Connector Board.
4. Check the solder connections at the connectors.
5. Refer to the Engine Board schematics and check the signal activity on the DAC, U23.
6. Trace the signal path.
5-10
• The AC outlet is supplying power.
• The AC adapter is properly connected to the unit.
keyboard models. Check all related connections.
Note: If you are diagnosing a PC2R rack unit, you can check for audio without having a
controller connected. Connect a pair of headphones, turn the power on. When the unit is
on and ready to play, simultaneously press the MIDI Receive and Global buttons to play
one of the stored demos. Flashing LEDs in the Performance section indicate the locations
of the stored demos. Select one to play to check the audio. Press the Cancel button to exit.
keyboard models.