Grass Valley SMS-6000 Series - Manual (Page 106)

5-2
Section 5 — Maintenance
Faults
Finding Faults
Experience shows that the most common faults are the simplest. This
section describes some of the most likely faults to be encountered in this
equipment and how to rectify them.
Initial Checks
Before assuming that there is a fault in the routing system, check the
equipment connected to the system and its cabling to ensure that the
signals and power are reaching the equipment correctly.
Fuses
These are probably the most likely part to fail during the equipment's life.
If there is no sign of life from the frame or panel check the mains/power
fuse. This is located inside a drawer in the mains/power inlet socket. To
check the fuse unplug the power cord, open the drawer and check the
rating. If defective, replace the fuse with the value marked on the serial
number on the unit. Push the drawer in place and plug the power cord in
again.
If one or more of the two left-hand pilot LEDs in the power module is out
then check the DC fuses. These are located on the power module. Remove
the front panel of the frame and withdraw the module after first releasing
the module lock on the handle. Replace any defective fuses with ones of the
correct rating. Replace the module in the frame locking it in place.
The DC fuse for the remote panel can be accessed by removing the panel
from its installation. Unplug the Quick-Link T-piece and then the power
cord, remove the top cover and check the fuse. If defective, replace the fuse
with one of the correct rating. Replace the cover and re-install.
Reset Microprocessor
A green LED on the matrix modules and the remote control panels denotes
that the microprocessor is running by flashing once a second. If this is not
the case try pressing the RESET pushbutton. The adjacent red LED shows
briefly the reset condition.
Visual Inspection
Many faults can be located by visual checks. Unplug the modules. Check
the condition of the gold edge connector fingers (see below). Check that all
the components fitted in sockets are correctly seated. Refit the modules
ensuring that they are locked in place. Remove the cover of the unit and
check that internal cables are securely plugged in.