Specifications

NOTE
It is normal to see a Bandswitch Fault during the short time
when the 2L1 Inductor Switch assemblies A8 and A9 are be-
tween their open/closed positions.
6.5.2.1 Measure the +24VDC relay supply using TUNE
Multimeter. If the supply is missing, check F12 and
troubleshoot the supply.
6.5.2.2 Make sure all cables on the Frequency Control In-
terface board are connected.
6.5.2.3 Observe LED bar graph DS10 and make the follow-
ing measurements on the Frequency Control Inter-
face board.
6.5.2.4 Left Compartment Illuminated
a. Ensure that P3 is properly installed.
b. Measure the voltage across F6, it should be 0VDC.
1. If it measures +24VDC, replace the fuse and measure
again. If the fuse opens again, measure the interlock
line resistance using another interlock line as a refer-
ence.
c. Measure the voltage at TP11, it should be +24VDC.
1. If the voltage is +24VDC, refer to the troubleshooting
section for the Frequency Control Interface board.
d. If the voltage is 0VDC, unplug P3 and ohmmeter check
the resistance from P3-3 to P3-8.
WARNING
ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL
PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT
SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE
REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE
RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING
“PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLT-
METER TO VERIFY THE POWER SUPPLIES HAVE BEEN DIS-
CHARGED PRIOR TO TOUCHING ANY COMPONENTS.
1. If the pins are open, use the overall wiring diagram and
the schematic for the Efficiency Coil boards to find the
open connection.
6.5.2.5 Center Compartment Illuminated
a. Ensure that P4 is properly installed.
b. Measure the voltage across F5, it should be 0VDC.
1. If it measures +24VDC, replace the fuse and measure
again. If the fuse opens again, measure the interlock
line resistance using another interlock line as a refer-
ence.
c. Measure the voltage at TP8, it should be +24VDC.
1. If the voltage is +24VDC, refer to the troubleshooting
section for the Frequency Control Interface board.
d. If the voltage is 0VDC, unplug P4 and ohmmeter check
the resistance from P4-3 to P4-8.
WARNING
ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL
PRIMARY POWER IS TURNED OFF ATTHE WALL DISCONNECT
SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE
REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE
RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING
“PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLT-
METER TO VERIFY THE POWER SUPPLIES HAVE BEEN DIS-
CHARGED PRIOR TO TOUCHING ANY COMPONENTS.
1. If the pins are open, use the overall wiring diagram
and the schematic for the Efficiency Coil boards to find
the open connection.
6.5.2.6 Right Compartment Illuminated
a. Ensure that P5 is properly installed.
b. Measure the voltage across F3, it should be 0VDC.
1. If it measures +24VDC, replace the fuse and measure
again. If the fuse opens again, measure the interlock
line resistance using another interlock line as a refer-
ence.
c. Measure the voltage at TP9, it should be +24VDC.
1. If the voltage is +24VDC, refer to the troubleshooting
section for the Frequency Control Interface board.
d. If the voltage is 0VDC, unplug P5 and ohmmeter check
the resistance from P5-3 to P5-8.
WARNING
ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL
PRIMARY POWER IS TURNED OFF ATTHE WALL DISCONNECT
SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE
REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE
RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING
“PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLT-
METER TO VERIFY THE POWER SUPPLIES HAVE BEEN DIS-
CHARGED PRIOR TO TOUCHING ANY COMPONENTS.
1. If the pins are open, use the overall wiring diagram and
the schematic for the Efficiency Coil boards to find the
open connection.
6.5.2.7 Driver Illuminated
a. Ensure that P6 is properly installed.
b. Measure the voltage across F4, it should be 0VDC.
1. If it measures +24VDC, replace the fuse and measure
again. If the fuse opens again, measure the interlock
line resistance using another interlock line as a refer-
ence.
c. Measure the voltage at TP10, it should be +24VDC.
1. If the voltage is +24VDC, refer to the troubleshooting
section for the Frequency Control Interface board.
d. If the voltage is 0VDC, unplug P6 and ohmmeter check
the resistance from P6-3 to P6-8.
6-14 888-2339-002
WARNING: Disconnect primary power prior to servicing.