Front Panel Troubleshooting (A1, A2) - Agilent Technologies 8753ET Service Manual

Digital Control Troubleshooting

Front Panel Troubleshooting (A1, A2)

Front Panel Troubleshooting (A1, A2)
Check Front Panel LEDs After Preset
1. Press on the analyzer.
Preset
2. Observe that all front panel LEDs turn on and, within five seconds after releasing
, all but the Chan1 and Port 1 LED turns off. Refer to
Preset
• If all the front panel LEDs either stay on or off, there is a control problem between
A9 and A1/A2. See
• If, at the end of the turn on sequence, the Chan 1 LED is not on and all GPIB status
LEDs are not off, continue with
• If you suspect that one or more LEDs have burned out, replace the A1 keypad
assembly.
Port 1 and Port 2 LED problems may be caused by the malfunction of the A23
NOTE
LED board or the A24 transfer switch.
Figure 6-6 Preset Sequence
6-12
"Inspect Cables" on page
"Identify the Stuck Key" on page
Figure
6-15.
6-6.
6-13.
Chapter 6