THOMSON DD10, Installation Manual

Page: 71 / 179

6. Initial Installation Diamond digital
62
6.2 POWERUP OF THE SWITCHER
Note
The switchers are not provided with a central power switch. Switching on
and off is made via the central mains distribution of the studio or the equip-
ment cabinet!
For service works, the switcher control panel contains on the power supply
board of the E-box one switch each for switching the line voltage.
Switching on
After having switched on the line voltage, a self-test is carried out in the electronics
box and control panel controller.
The correct functioning of controller RY 1917 is indicated by a running light in the
two LED rows.
Functiong of the power supply is indicated by the ”green” LEDs. For each main line
of the voltage distribution in the support frame, a separate LED is available.
If one of the status LEDs lights ”red”, the switch for the VCO adjustment is not in
the OPERATE position. If the LED rows of the controller indicate a defined error
code, please see the section ”Diagnosis” in the service manual.
In the control panel, all key lamps are lit temporarily. Subsequently, the control
panel returns to the operational state achieved before switching out.
No Reference
If the LED ”No Reference” on the plug-in cards RY 1911, RY 1912 and RY 1914
is lit red, make sure that the switcher receives an external reference signal and
press the RESET key.
The status LEDs are switched off when switching on or performing a RESET. After
run of a diagnosis, the LEDs are lit to indicate correctly operating p.c. boards.