Vector-LP Radio Beacon Transmitter Technical Instruction Manual Page 5-5
Section 5 Maintenance and Troubleshooting Issue 1.1
Table 5-1: Troubleshooting and Replacement Tips
Front Panel
LED
Status
Message
Action
See Troubleshooting/
Replacement Paragraph
See Re-calibration
Paragraph
AC Mains Low AC Voltage The ac voltage is less than 170 V ac (or 90 V ac for VR125 transmitters). If the ac source voltage is present,
check the ac breaker at the back of the transmitter. If the breaker is OK, replace the interface PWB (A11).
5.8.3 N/A
Low Voltage Power Supply LVPS Fault A or B Replace associated ac/dc universal input power supply [side A (U2) or side B (U3)]. N/A N/A
Power Supply Over Voltage PS
A or B
Replace switch mode power supply PWB (A2 of associated RF power module). 5.6.1 3.6.13.4 (ensure the
replaced/repaired module is
on the standby side)
Power Supply Over Current PS
A or B
Replace switch mode power supply PWB (A2 of associated RF power module).
If the transmitter is running in dc mode (optional), and this alarm is indicated on the active side, replace
battery boost assembly A16. Otherwise, check cabling between A7 and A3 through A6.
5.6.1
5.9
3.6.13.4 (ensure the
replaced/repaired module is
on the standby side)
Power Supply High Temp PS
A or B
Check fans. Ensure they are spinning at an adequate speed (a minimum of 3000 RPM, see 3.6.13.2). If
necessary, replace the appropriate fan.
N/A N/A
Power Supply PS A or B Missing Module An RF power module has been removed from the associated side. N/A N/A
PA Modulator Fail
A or B
Check/replace FET on modulator assembly (A5 of associated RF power module). 5.6.1
5.7
3.6.13.4 (ensure the
replaced/repaired module is
on the standby side)
PA PA Alarm
A or B
Check/replace FETs on power amplifier (A3 of associated RF power module). 5.6.1
5.7
3.6.13.4 (ensure the
replaced/repaired module is
on the standby side)
PA PDM Inhibit A or B A module has been removed from the transmitter. A PS Missing Module message will indicate which module
has been removed.
N/A N/A
Exciter Low NVRAM Bty Replace battery BT1 on the control/display PWB (A1).
N/A N/A
Exciter RF Fail A or B Replace the RF synthesizer PWB [side A (A5) or side B (A8)].
5.8.1.1 4.3.6.1
4.3.6.9
Exciter PDM Latch A or B Change the active side of the exciter and run a standby side test on the power supply (see 3.6.13.4). If a fault
is detected, replace switch mode power supply PWB of faulty power module. If no fault is detected, replace
interphase PDM driver PWB [side A (A6) or exciter B (A9)].
5.8.1.2 4.3.6.3 (single side) or
4.3.6.10 (dual side)
3.6.13.4 (ensure the
replaced/repaired module is
on the standby side)
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