Figure 3: Power status LEDs
All of these LEDs should be green a few moments after powering on the instrument. If any of these LEDs are red, or are not lit, return the
instrument to a Tektronix Service Center for repair.
Troubleshoot the power supply
Use this procedure to determine if the power supply is defective and needs replaced.
Before you begin
• To prevent electrostatic damage to components whenever you work on the instrument, wear properly-grounded electrostatic prevention
wrist and foot straps, and work in a tested antistatic environment on an antistatic mat.
•
on page 20
•
on page 22
Procedure
1. Connect the power cord to the AC connector on the back of the rear chassis.
2. Measure for +12 V
DC
between chassis and pin 10 of J3203 (large connector). If there is +12 V
DC
on page 33. If
you do not m12 V
DC
at Pin 10 of J3203 connected to the circuit board:
Maintenance
5 Series MSO Service Manual MSO54, MSO56, MSO58
32
