Studer SW V4.0 OnAir 1000, Operating And Service Instructions

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OnAir 1000 Digital Mixing Console
Date printed: 24.10.03 SW V4.0
Hardware 2-5
2.4 Touch Screen
The LC display has a resolution of 640 × 200 pixels. A cold-cathode fluo-
rescent lamp (CFL) provides the back light, having a typical lifetime (50%
brightness) of 10'000 to 15'000 hours (meaning about 13 to 20 months of
continuous operation). CFL replacement is very easy, and spare parts are
available.
Caution! The CFL supply voltage is about 400...600 V. Switch the console OFF
before opening it!
A touch matrix with 12 × 6 active fields is mounted on the LCD. The
touch switches are pressure sensitive and can only switch if a certain force
is applied. Therefore the touch matrix function is not influenced by con-
tamination (as fingerprints etc.).
The touch-screen surface consists of a PET foil. Never use any solvents
such as acetone to clean the surface. Most glass or PC monitor cleaners do
a good job.
2.5 User Surface
On the channel sections there is only one PCB (Front Board 1.942.710.xx)
which reads all the keys and faders.
The center section consists of three PCBs:
• Control Front Board I (1.942.610.xx) is the controller for the center
section. It is mounted behind the LCD and reads the touch matrix, the
rotary encoders, as well as all keys and the potentiometers of the moni-
toring control section.
• Control Front Board II (1.942.111.xx) is the PCB with the control ele-
ments for the monitoring (volume controls, keys).
• Control Front Board III (1.942.612.xx) carries the rotary encoders.
2.6 Signal Processing and System Control
The DSP Board (1.942.102.xx) performs the audio functions for the con-
sole. All input units are connected to this board via the ribbon cable con-
nectors labeled IMB-1 and IMB-2 (IMB = Input Module Bus). Each IMB
consists of an entire six-channel section (6 input units).
The output units are connected to the Output Module Bus (OMB). All
output units, the monitoring section, and the Control Front Board I are
connected to the OMB.
For more details refer to the block diagram in the Operating Manual,
chapter 1 .