Ericsson 1/KRB 101 1108, Инструкции по установке, эксплуатации и обслуживанию

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© 2001 – Ericsson Amplifier Technologies Inc.
29
Figure 8. MCPA Troubleshooting Flow Chart
(Sheet 2 of 2)
Is the
OVER PWR
ALARM LED
illuminated?
Yes
Reduce RF
input signal level
and verify that output
power measurement
is
<
maximum rated power.
Does the OVER PWR
ALARM
remain?
Yes
No
Attempt to reset fault circuits
by resetting power to the MCPA as
shown in Figure 5. If fault returns,
contact Ericsson Amplifier
Technologies for assistance,
or return MCPA for service.
Is the
TEMP WARN
ALARM LED
illuminated?
Yes
If problem remains or is not
listed, contact Ericsson Amplifier
Technologies for assistance,
or return MCPA for service.
No
Ensure ambient temperature
is < 50° C. Attempt to reset fault
circuits by resetting power to the MCPA
as shown in Figure 5. If fault returns,
contact Ericsson Amplifier
Technologies for assistance,
or return MCPA for service.
No
Is the
TEMP ALARM LED
illuminated?
Yes
Attempt to reset fault circuits
by powering MCPA OFF/ON, and
then apply ENABLE command. If fault
returns, contact Ericsson Amplifier
Technologies for assistance,
or return MCPA for service.
Yes
No
No
Is there air
flow through the front
of the MCPA?
Replace fan. Remove 4 screws
which secure it to the rear panel.
Disconnect fan harness connector.
Install new fan in reverse order.
to MPD for service.
POWER OFF!
Restore RF output connection,
and/or repair antenna, antenna
connection.
Is the
VSWR ALARM LED
illuminated?
Yes
Is RF output
connection secure, and
connected to a suitable
load (or antenna)?
Yes
No
Is the
POWER SUPPLY
ALARM LED
illuminated?
Yes
No
Verify connections to MCPA.
If secure, contact Ericsson Amplifier
Technologies for assistance, or
return MCPA for service.
Yes
From sheet 1
No
Attempt to reset fault circuits
by resetting power to the MCPA as
shown in Figure 5. If fault returns,
contact Ericsson Amplifier
Technologies for assistance, or
return MCPA for service.