Preventive Maintenance and Fault-finding
Reference Guide: Voyager E5784 and E5788 HD DSNG Encoder
Page 6-7
ST.RE.E10137.3
6.5 Fault-finding
6.5.1 Fault-finding
Philosophy
It is the objective of this chapter to provide sufficient information to enable
the operator to rectify apparent faults or else to identify the suspect
module, where possible. Some basic procedures are provide to follow in
the event of a suspected Encoder failure. It is assumed that fault-finding
has already been performed at a system level and that other equipment
units have been eliminated as the possible cause of the failure (see
relevant System Manual).
WARNING…
DO NOT REMOVE THE COVERS OF THIS EQUIPMENT. HAZARDOUS VOLTAGES ARE PRESENT
WITHIN THIS EQUIPMENT AND MAY BE EXPOSED IF THE COVERS ARE REMOVED. ONLY
TANDBERG TELEVISION TRAINED AND APPROVED SERVICE ENGINEERS ARE PERMITTED TO
SERVICE THIS EQUIPMENT.
CAUTION…
Do not remove the covers of this equipment. Unauthorised maintenance or the use of non-approved
replacements may affect the equipment specification and invalidate any warranties.
This manual does not include any maintenance information or procedures
which would require the removal of covers.
If the following information fails to clear the abnormal condition, call a
Service Engineer or contact Customer Services using the information given
in the preliminary pages of this manual.
6.5.2 Preliminary
Checks
Always investigate the failure symptoms fully, prior to taking remedial
action. Fault diagnosis for the equipment operator is limited to the
following tasks, since the operator should NOT remove the covers of the
equipment:
1. Check the front panel Power LED. If this is not lit:
a) Replace the fuse in the power connector at the rear panel (see
Section 6.5.3, AC User Accessible Fuse Replacement).
NOTE…
Only replace the fuse once. If it blows again contact Customer Services.
b) Replace external equipment, power source and cables by
substitution to check their performance.
2. Confirm that the equipment hardware configuration is suitable for the
purpose and has been correctly installed and connected (see
Chapter 2, Installing the Equipment).
3. Confirm that inappropriate operator action is not causing the problem,
and that the equipment software set-up is capable of performing the
task being asked of it. If the validity of the configuration, set-up or
operation is in doubt, check it (see Chapter 4, Operating the Encoder
Locally).
4. Check that the fans are unobstructed and working correctly.
