Starthere; Check The Green Led And Red Led On Al5 - HP 8753E Service Manual

Start Here

Check the Green LED and Red LED on Al5

Switch on the analyzer and look at the rear panel of the analyzer. Check the
two power supply diagnostic LEDs on the Al5 preregulator casting by looking
through the holes located to the left of the line voltage selector switch. (See
Figure 5-2.)
During normal operation, the bottom (green) LED is on and the top (red) LED is
off. If these LEDs are normal, then Al5 is 95% verified. Continue to "Check the
Green LEDs on A8".
If the green LED is not on steadily, refer to "If the Green LED of the Al5 Is
q
not ON Steadily" in this procedure.
If the red LED is on or flashing, refer to "If the Red LED of the Al5 Is ON" in
q
this procedure.
Figure 5-2. Location of Al5 Diagnostic LEDs
54 Power Supply Troubleshooting
RED LED GREEN LED
NORMALLY OFF
NORMALLY ON
LINE VOLTAGE
SELECTOR SWITCH