Operation Manual Part 2

Digital Liquid Cooled UHF
TV Equipment
Description / Test points / Location of units
9946 V1
45321648.01 104 A E
preliminary
62 / 131
Numéro / Number Doc. Rev. Lan
g
u.
16/06/2006
Pa
g
e
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
These fuses go open circuit in over-current conditions and reset automatically; they cannot be
changed on line.
Fuses on the mother board
PROTECTIVE
DEVICE
POWER SUPPLY SOURCE DESTINATION
F1 +5 V CPU power supply card MODAP logic system
F2 +12 V CPU power supply card Multiplex card
Fuses on the daughter board
PROTECTIVE
DEVICE
POWER SUPPLY SOURCE DESTINATION
F1 +5 V CPU power supply card PCL
F2 +12 V exciter A power supply card PCL
F3 -12 V exciter A power supply card Multiplex card
F4 +12 V exciter B power supply card PCL
F5 -12 V exciter B power supply card Multiplex card
F6 +24 V CPU power supply card PCL
F7 +24 V CPU power supply card
F8 -12 V exciter A + B power supply card Provisional
F9 +12 V exciter A power supply card Provisional
F10 +12 V exciter B power supply card Provisional
F11 -12 V exciter A power supply card PCL
F12 -12 V exciter B power supply card PCL
3.5.3. Indicator lamps and message displays
Since this card is only concerned with interconnections, it does not have any indicator lamps or
operational status indicators.
3.5.4. Controls
The transmitter configuration can be controlled by override switches mounted on the exciter/CPU
interconnection card mother board as follows :
♦ SW1 : switches the transmitter to installation mode,
♦ SW2 : switches the transmitter on if the CPU is faulty or not present,
♦ SW3 : switches the transmitter off if the CPU is faulty or not present,
♦ SW4 : switches exciter A to air if the CPU is faulty or not present,
♦ SW5 : switches exciter B to air if the CPU is faulty or not present.
3.5.5. Power input
Since this card is only concerned with interconnections, it does not have any need for a power supply.
The few internal components which need power use the voltage supplies from the exciter and CPU
power supply cards.