Clavia nord STAGE, Руководство по обслуживанию

Страница: 8 / 20

Clavia DMI Service manual Nord Stage rev. 1.1 Page 7
Hardware
Hardware structure
The hardware structure is common for all three Nord Stage products:
One power supply unit, one main board and two panel boards.
Power supply
The Nord Stage is supplied with several different voltages from the power board.
These are +3.3V, +5V and ±12V. For more information on where to measure these
voltages, see the schematic for the power supply. There are also two voltages supplied
from the main board.
U46
(23340)
supplies the Host and DSP´s with +1.8V, U43
(21540)
supplies the audio D/A with +5V. The Power supply is connected to the main board with
a 10 pole connector
P2
(
22480).
Main Board
The main board is equipped with five DSP´s U16-U20
(23280) ,
which is controlled by a
host processor U10
(23180)
with two DRAM circuits U8 and U9
(23170)
(1M*16 bits).
Boot code for the host processor is stored in the BootPROM U6
(23891)
(512k*8 bits).
OS and piano samples are stored in a Flash memory U27-U30 U31-U34
(24000)
(16M*16 bits). Various other information, e.g. user settings is stored in an
EEPROM
U24
(24147)
(2k*8 bits).
Audio D/A conversion is performed by U44 and U45
(23430)
.
A/D conversion of the control pedal takes place on the panel board 1 U14
(23370) .
All input and output jacks are filtered from radio signals with an EMI-filter
(23110)
(component designator prefix F). External connectors are two 26 pole connector for the
panel boards
P3-P4
(22520) ,
a 10 pole connector for the power supply unit P6
(22480) ,
two keyboard connectors P1-P2
(22680) ,
one four pole connector for the after touch strip
P5
(23790)
and one six pole Picoflex connector for memory card P9
(24152)
.
Panel Board 1
On this panel board you will find all control functions for the master level/rotor effect,
organ, piano and program section. This panel also holds the LCD
(24020)
, main program
encoder
(23720),
pitch stick
(10295)
and mod. wheel connector P8
(22710). T
he panel board
is connected to the main board with a 26 pole connector P1
(22520).
Panel Board 2
On panel board 2 you will find all control functions of the synth, extern and effects
section. The panel board is connected to the main board with a 26 pole connector
P1
(22520).