Technical data

5-20 Chapter 5
Power Supply Troubleshooting
Intermittent Problems
Intermittent Problems
Preset states that appear spontaneously (without pressing ) typically signal a
power supply or A9 CPU problem. Since the A9 CPU assembly is the easiest to substitute,
do so. If the problem ceases, replace the A9. If the problem continues, replace the A15
preregulator assembly.
Preset