GRASS VALLEY 1200, Installation And Service

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4-3
Servicing Precautions
Removing Circuit Modules
All of the video processing and control processing in the system takes place
on circuit modules in the Signal Processor Frame and Control Panel. The
locations of these modules are illustrated in the appropriate portions of this
section.
CAUTION
When removing circuit modules from the frame place them on a flat static
controlled surface. Failure to follow this precaution can result in component
damage due to electrostatic discharge.
Two circuit module extenders are provided with the system. One is for use
with I/O modules (top or bottom bay). The second is for use with M/E
modules (middle bay). The extender modules allow operation of the
system while providing access to test points and adjustments that would
be inaccessible with the module seated normally.
CAUTION
If a circuit module in the Signal Processor frame is removed or reinstalled while the
power is on, it is unlikely that permanent damage will occur to the module or
system. Microprocessor messages, however, may become scrambled. This may
result in system errors and improper operation. If these problems occur, the only
sure way to restore proper operation is to turn power to the frame OFF and then
back ON again. The power-up sequence will re-synchronize the microprocessors.
Repairing Circuit Modules
Model 1200 circuit modules are not designed to be repaired in the field.
Failed modules should be replaced.
Multi-layer circuit board and surface-mount manufacturing techniques
have been used in many of the circuit modules. Specialized equipment and
training are required to properly repair these modules.
CAUTION
Do not attempt component-level field repair on these circuit modules. Use of
improper tools or equipment to repair multi-layer and surface-mount circuit
modules could result in potentially expensive damage to your system.