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Valcom, Inc.
5614 Hollins Road
Roanoke, VA 24019
USA
P. 540-563-2000
F. 540-362-9800
www.valcom.com
Troubleshooting
The clock is not running. What do I do?
1. Measure the input voltage to the clock. The voltage should measure 85-135 volts in the
120VAC model or 240VAC model or 10-28 volts in the 2.5”/24VDC model and 16-28 volt in
the 4.0”/24VDC model.
2. Make sure the ground wire is not touching other wires.
NOTE: If you fail to follow instruction 2 the fuses can be blown.
The clock is not receiving an input signal. What do I do?
1. For V-D110XXB, Make sure that JP6 is in the proper position. Refer to “Adjustable Jumper
Settings“ for
details and diagrams.
2. For V-D24XXB-6, Make sure that the polarity of the communication wire is correct when using
the clock in 2-wire digital communication mode.
3. For V-D110XXB, make sure that the input voltage is zero when not applying a correction
signal. When taking this measurement, you must be sure that the clock is disconnected from
the master clock. Also, measure both AC & DC voltage. (The current consumption needed
is very low, about 3mA, and a leakage current from the master clock can be interpreted as
a continuous reset signal. If you are experiencing such a problem, please install a bypass
mechanical relay).
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