HP 8753E Service Manual

Front Panel Troubleshooting (Al, A2)
Check Front Panel LEDs After Preset
1. Press B on the analyzer.
2. Observe that all front panel LEDs turn on and, within five seconds after
releasing B, all but the CHl and Port 1 LED turns off. Refer to
Figure 6-6.
q If all the front panel LEDs either stay on or off, there is a control problem
between A9 and Al/A2. See “Inspect Cables, n located later in this chapter.
q If, at the end of the turn on sequence, the channel 1 LED is not on and all
HP-IB status LEDs are not off, continue with “Identify the Stuck Key”.
q If you suspect that one or more LEDs have burned out, replace the Al
keypad assembly.
Note
Port 1 and port 2 LED problems may be caused by the
malfunction of the A23 LED board or the A24 transfer switch.
Figure 6-6. Preset Sequence
Digital Control Troubleshooting 6-13

HP 8753E Specifications

General

Brand	HP
Model	8753E
Category	Measuring Instruments
Language	English