TANDBERG E5780, Справочное руководство

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Preventive Maintenance and Fault-finding
Reference Guide: evolution 5000 E5780 and E5782 Encoder Page 6-9
ST.RE.E10135.4
6.7 Fault-finding
6.7.1 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.
6.7.2 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 6.7.3, A.C. 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.
When the failure condition has been fully investigated, and the symptoms are known, proceed
with fault-finding according to the observed symptoms. If the fault persists, and cannot be
rectified using the instructions given in this manual, contact Customer Services. Switch off the
equipment if it becomes unusable, or to protect it from further damage.