BIRD Wattcher 3170B, Operation Manual

Page: 25 / 42

Maintenance
15
Troubleshooting
Locate the problem, review the possible cause, and perform the corrective action listed.
Note:
Only those functions within the scope of normal maintenance are listed. This manual can not
list all malfunctions that may occur, or corrective actions. If a malfunction is not listed or not corrected
by the listed corrective actions, notify a qualified service center.
Table 5 - Troubleshooting
PROBLEM CAUSE AREAS TO CHECK / CORRECTION
Active LED does not
Illuminate
No Line Power Check power source, restore
Defective line cord.
Fuses Opened Check fuses, replace if needed. See
"Fuse Drawer/
Fuse Replacement" on page 17
.
Defective monitor circuitry. Return Wattcher, line section, and elements to the
factory. See
"Customer Service" on page 13
.
Line voltage selector switch in
wrong position. Set switch to proper operating voltage.
No meter indication No RF power Check RF source.
Arrow on plug-in element
pointing in wrong direction
Change position of element.
No pickup from DC wiper
contact Adjust wiper contact. See
"Adjusting the Element
Wiper Contact" on page 16
.
Open or short circuit in DC
meter cable Replace defective DC meter cable.
Open or short circuit in line
section circuit in cable. Replace defective cable.
Meter burned out or damaged Replace defective meter. See
"Meter Replacement"
on page 19
.
Defective monitor circuitry. Return Wattcher, line section, and elements to the
factory. See
"Customer Service" on page 13
.
Intermittent or inconsistent
meter readings Faulty transmission line Inspect line connectors. Replace defective connector.
Dirty DC contact on elements Clean DC contacts. See
"Cleaning" on page 13
.
Sticky or defective meter Replace defective meter. See
"Meter Replacement"
on page 19
.
Reflected meter pointer
max out with RF power
applied. Meter/Line section cables
reversed. Connect reflected cable to proper BNC connector on
rear panel.
High VSWR or reflected
power Bad load or poor connectors. Replace load or connectors.
Shorted or open transmission
line. Have transmission line serviced.
Foreign material in the line
section or in RF connector
bodies. Remove foreign material. See
"Cleaning" on page
13
.
Remote meter pointer is
maxed out. Series resistor not installed. Series resistor of 33.2 K are required for each remote
meter.
Unit does not operate from
external DC source. Fuse opened. Replace fuse, but check maximum voltage of DC
source. See
"Replacing Fuse for External DC
Input Voltage" on page 18
.