Installing the Equipment
Instruction Manual: Professional Receivers and Decoders (IRD)
Page 2-7
ST.TM.TT1220.1
2.5
AC Supply Voltage and Fusing – Safety
Information
2.5.1
AC Power Supply
The TT1220 operates from a full range auto-sense power supply. The
power supply is set to operate from 100 to 240 Vac 50 to 60 Hz nominal,
and is designed for use in ambient temperature in the range of 0
°
C to
+ 50
°
C.
WARNING…
REMOVING THE COVERS OF THIS EQUIPMENT MAY INVALIDATE ANY WARRANTIES, CAUSE A
SAFETY HAZARD AND / OR AFFECT THE EMC PERFORMANCE. CHECK WITH TANDBERG
TELEVISION CUSTOMER SERVICES.
The full technical specification is given in Annex B, Technical Specification.
WARNING…
THE TT1220 SHOULD ONLY BE OPERATED FROM THE TYPE OF POWER SOURCE INDICATED
ON THE MARKING LABEL. IF YOU ARE NOT SURE OF THE TYPE TO YOUR BUSINESS,
CONSULT YOUR APPLIANCE DEALER OR LOCAL POWER COMPANY. DO NOT OVERLOAD
WALL OUTLETS AND EXTENSION CORDS AS THIS CAN RESULT IN A RISK OF FIRE OR
ELECTRICAL SHOCK.
Table 2.1: Fuse information
Item
Specification
Fuse
PCB fixed fuse, on the power supply board
Fuse type
T4A
Fuse rated voltage
250 Vac
WARNING…
THE FUSE IS ONLY TO REPLACED BY APPROVED TANDBERG TELEVISION ENGINEERS. THE
POWER SUPPLY AND FUSE ARRANGEMENT IS NOT USER SERVICEABLE.
2.5.2
Technical Earth
A unmarked terminal at the rear panel (left of the power socket) is a
technical earth. It is provided to:
1.
Ensure all equipment chassis fixed within a rack are at the same
technical earth potential. To do this, connect a wire between the
Technical earth terminal and a suitable point on the rack.
2.
Eliminate the migration of stray charges when connecting between
equipment.
NOTE…
The technical earth shall be fitted with a bolt of M4 x 6 dimensions, 4 millimetres in diameter, and no
longer than 6 millimetres.
