Nautel VS1, Руководство по устранению неисправностей, Страница: 40 / 109

VS1 Troubleshooting Manual Responding to alarms
Page 1-32 Issue 10.0 2018-10-29
Preparation for replacing a PWB or module
1. Disable the VS1’s RF output (RF off) and set its
AC POWER
switch to the off position.
Disconnect all cabling from the rear of the VS1, remove the VS1 from its host cabinet and
place the VS1 on a suitable work surface.
2. Based on the alarm that prompted troubleshooting, replace the appropriate PWB, module or
cooling fan (see the appropriate replacement procedure in Table 1.5 on page 1-32 ).
Table 1.5: Replacement Procedures
NOTE:
If a power amplifier (PA) failure occurs, you must replace the entire power
amplifier PWB, rather than an individual FET. A spare PA PWB (NAPA23/
03A) is provided in the transmitter station spares kit, if purchased. To order a
station spares kit contact Nautel. Failure to observe this recommendation may
void your equipment warranty or cause further failures.
Module Replacement Procedure
PA PWB See page 1-33
Pre-amp/IPA PWB See page 1-36
Power Supply Module See page 1-39
+48 V Power Supply See page 1-40
Cooling Fan See page 1-41
Exciter/Control PWB See page 1-43
PS Distribution PWB See page 1-46
Combiner Interface PWB See page 1-47