Klark teknik dn780 reverb

Page 2

*' DN780 SERVICE MANUAL ***

13.AUG.85

GENERAL SYSTEM OVERVIEW

The DN780 Reverberator/Processor is split up into six circuit
boards as follows:-

1. Power Supply Board

2. Front Panel/Display Board

3. Microprocessor Board

4. D.S.P. (Digital Signal Processor) Board

5. Convertor Board

6. Audio In/Out Board

The circuit block diagram shows the interconnection between these
boards.

1 POWER SUPPLY BOARD

This section converts the A.C mains voltage to the required
D.C voltages. It contains all the mains voltage switches,
mains transformer, secondary (low voltage) fuses,
rectifiers and regulators to supply all the other boards
(and the remote unit) with stabalized D.C Power.

FRONT PANEL/DISPLAY BOARD

This board contains the audio level control and headroom
indicator, and the primary user interface which consists of
the function keys, the display and display drivers. These
are controlled by the microprocessor board.

MICROPROCESSOR BOARD

This is the primary control for the DN780. It decodes and
displays information via Front Ranel Board. It contains the
remote interface circuitry. It stores all the user programs
in its non-volatile memory and it has direct control over
the D.S.P Board.