Rohde & Schwarz NGMO1 - General Troubleshooting

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Repair
8.4 General Troubleshooting
Type of fault Fault diagnose Fault rectification
NGMO2 does not
deliver output voltage
on both channels
• Fuse blown by overvoltage at
the power supply input.
• LEDs for operating voltage on
processor board do not light
(see section 8.3.1).
• Fault still present.
• Replace defective fuses.
• Replace processor board as
described in section 9.1.4.
• Return the NGMO2 to the
Support Service Centre (see
chapter 2).
NGMO does not
deliver output voltage
on one channel
• On one power supply unit the
corresponding fuses have been
blown by overvoltage at the
power supply input.
• LEDs for operating voltage
assigned to one of the mains
supply units on the processor
board do not light (see section
8.3.1).
• LEDs for operating voltage on
one of the processor boards do
not light (see section 8.3.1).
• Fault still present.
• Replace defective fuses.
• Replace processor board as
described in section 9.1.4.
• Replace the corresponding
analog board as described in
section 9.1.2.
• Return the NGMO2 to the
Support Service Centre (see
chapter 2).
8-18 3.00 / 05-2014