Tektronix Grass Valley 4000, Installation And Service, Page: 260 / 286

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Section 5 — Troubleshooting and Diagnostics
Figure 5-13. 064817—Chroma Key Input Module
1. Check the Operator’s Guide to verify correct usage of the function that appears broken.
2. Verify the function in question is supported by the current software release.
3. Is the LED at front edge of the Sync Generator module lit? If not, check fuse on the
Move the suspected module to another Chroma Key Input slot in
the frame. Then reconfigure the Chroma Keyer (using the
1. Visually inspect the module for obvious problems: bent connector
pins; improperly socketed parts; or broken solder connections.
2. Verify alignment of module. See Alignment Procedure xxxxx.
064817 - Chroma Key Input Module
Chroma Key Input Module.
4. Identify which Serial Input Module is responsible for the input in question from the
following list:
Chroma Key Input 1 (Slot D9): Inputs 1 and 2
Chroma Key Input 2 (Slot D8): Inputs 3 and 4
Chroma Key Input 3 (Slot D7): Inputs 5 and 6
The problem did not
follow the module.
Problem is
Module in
The problem
module.
probably the
question.
followed the
This especially applies to selection of input format for analog inputs, and setting switcher
input timing (this determines clamp timing of analog inputs).
Configure Menu) so that the Chroma Keyer now
uses the new input.
Problem is not on
Chroma Key Input Module
064817
3. If unable to locate problem, contact customer service for instructions.