Kurzweil PC88 - Page 89

Chapter
4
Troubleshooting
Audio Problems
No Audio, Distortion/Crackling on Output(s)
1. Check the wire cable at J306 on the I/O Board.
2. Check the wire cable at J2 on the Engine Board.
3. Check solder connections.
4. Refer to Schematic Diagrams.
5. Check signal activity at DAC, AD1865, U7 on the
Engine Board.
6. Trace audio signal path.
7. Find and replace bad component(s).
8. Diagnose to board. If necessary, order circuit board
replacement.
Internal Sound Problems
1. Eliminate possibility of Audio problems.
2. Run Diagnostic Tests to check for failures.
3. If all tests pass, refer to the Schematic Diagrams
and check signal paths.
4. Find and replace bad component(s).
5. If necessary, order circuit board replacement.
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PC88 Service Manual
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