Grass Valley 1200 Installation - Manual (Page 138)

5-6
Section 5 Ñ Diagnostics and Troubleshooting
Detailed Troubleshooting
If the previous general troubleshooting steps did not highlight the
problem, the following Trouble Trees of symptoms and probable causes
may help (see Figure 5-1, Figure 5-2, and Figure 5-3 on page 5Ð8).
Figure 5-1. Trouble TreeÑCommunications
1. Check Switcher setup;
see Section 2 of this
manual
2. Check control panel
cable
1. Check AC fuses inside:
AC Input Connector
Frame Power Supply
2. Check for power on
power cord
3. Replace Power Supply
1. Check fuse on that
module
2. Verify that module
is plugged in
NO
NO
Power to
System?
YES
Power to
Module?
YES
Start
1. Verify RS-232/422
jumpers on Control
Processor and baud
rate, parity etc. in the
config/ports menu.
2. Send data to Model
1200 and check for
correct serial port LED
flash:
YES
NO
YES
NO
Serial Port
Communication
Problems?
Switcher
responding
to Panel?
End
a. LED flashes: Data
is coming into
Model 1200.
Check Editor
Interface in this
section to verify
settings and Model
1200 operation
b. Wrong LED
flashes:
Equipment is
plugged into
wrong serial port
c. LED does not
flash: External
equipment not
sending data,
bad serial cable,
or bad serial
buffer on Model
1200 (try another
port)