Tektronix Grass Valley 4000, Installation And Service

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5-2
Section 5 — Troubleshooting and Diagnostics
System 4000 Service Philosophy
The service philosophy presented throughout this manual is aimed at rapidly
isolating system problems to the circuit board or “ black-box” level only. This
approach is necessitated by circuit complexity, the use of multi-layer boards,
surface mount technology (SMT), ASICs, and hybrid circuits. The fault is traced to
the module or assembly level, then the module or assembly is replaced using a
spare or an exchange module from GVP Customer Service.
Isolating problems in the Model 4000 system involves a systematic and logical
troubleshooting process explained later in this section under the Troubleshooting
heading. A basic understanding of the system architecture as described in Section
3 - Functional Description will aid you in this process.
Static Precautions
Many of the integrated circuits used in this equipment may be damaged by static
discharge. Damage caused by static discharge may not show up immediately.
Instead, it may result in reduced life span of the component which may result in
earlier than expected failure of the module.
CAUTION
To avoid damage to circuitry caused by electro-static discharge, use approved
anti–static techniques (i.e. wrist straps and anti-static mat) whenever handling
circuit modules.
Module Extenders
There are two module extenders provided with the system, one for the
I/O Modules in the rear C and D Bays and one for the Video and Control modules
in the front A and B Bays. Use care when handling any module on the extender and
also when probing on the module itself.