Grass Valley SMS-6000 Series - Manual (Page 112)

5-8
Section 5 — Maintenance
Input Standard Phase-Locked Loops
Allow at least 15 minutes for the circuits to reach normal operating
temperature. These adjustments cannot be made on an extender.
Connect the router output to a picture monitor, and the input to be
adjusted to a signal of the appropriate TV standard. Set the router to
receive at that standard, Refer to the instructions of the SMS-6000
Configuration Editor.
The input stages are mounted on SIMM modules: Input 1 on the left of the
module through to Input 16 on the right.
To adjust the phase-locked loop follow the steps below:
1. Adjust for lock.
2. Adjust clockwise until lock is lost.
3. Adjust counterclockwise until lock is re-gained.
4. Adjust counterclockwise a further half (1/2) turn.
Routine Maintenance
The only items requiring routine maintenance are the cooling fans fitted in
some matrix frames.
Cooling Fans
A fan is used in the 3RU frames and in the serial digital video matrix in a
1RU frame. The 3RU frame has a filter and this should be cleaned
periodically. The fans used are rated at 50,000 hours so expect to replace
them after five years. There is no monitoring of the fan so it is
recommended that the fan is replaced during a period of routine
maintenance rather than waiting for the fan to fail. However the
equipment will continue to run without the fan in ambient temperatures of
up to 35
°
C but extended use without the fan may reduce the life of other
components in the unit.