TANDBERG E5714 - Manual (Page 221)

Preventive Maintenance and Fault-finding
Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder Page 6-7
ST.TM.E10076.3
Buzzer Test
Press the Buzzer softkey to access the option which immediately causes a
buzzer to sound. Press any key (except the Quit softkey) to turn the
buzzer off. Press the Quit softkey to return to the menu.
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, 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.