Specifications

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.
NOTE
There are only two Efficiency Coil boards on the Driver Com-
biner Motherboard.
6.5.2.8 Predriver Illuminated
a. Ensure that P1 is properly installed.
b. Measure the voltage across F1, 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 TP1, 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 P1 and ohmmeter check
the resistance from P1-8 to P1-15.
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 Predriver Tuning board to find
the open connection.
6.5.2.9 Driver Illuminated
a. Ensure that P2 is properly installed.
b. Measure the voltage across F2, 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 TP5, 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 P2 and ohmmeter check
the resistance from P2-8 to P2-15.
1. If the pins are open, visually inspect the jumper on the
plug and the contacts to find the open connection.
6.5.2.10 2C2/2L1 Illuminated
a. Ensure that P7, P8, and P21 are properly installed.
b. Measure the voltage across F7, 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 the 2C3/2C4 interlock line as a
reference.
c. Measure the voltage at TP15, 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 P8 and ohmmeter check
the resistance from P8-15 to P8-8.
1. If the pins are open, visually inspect the jumper on the
plug and the contacts to find the open connection.
e. Unplug P21 and ohmmeter check the resistance from
P21-9 to P21-5.
1. If the pins are open, visually inspect the jumper on the
plug and the contacts to find the open connection.
f. Unplug P7 and ohmmeter check the resistance from P7-9
to P7-5.
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, visually inspect the position of the
2A8 and 2A9 Inductor Switches. They should either be
fully retracted (switch open) or fully extended (switch
closed) position.
g. If either switch is between positions, measure the AC
supply, ohmmeter check the motor, and troubleshoot the
K1 control circuits.
h. If both switches are in the proper position measure the
resistance from J2-9 to J3-9, it should normally be 0
Ohms.
1. If it measures open, ohmmeter test S3 & S4 and replace
if required.
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.
888-2339-002 6-15
WARNING: Disconnect primary power prior to servicing.