8-3
673
611A
686
675
674
671
671
670
(Left to right, facing front of DA20):
Slot
Number
Cat.
No.
Description
1
Empty
2
reserved
3
reserved
4
reserved
5
reserved
6
reserved
7
reserved
8
reserved
9
reserved
10
reserved
11
reserved
12
670
Video Front End board
13
671
Dual DSP board
14
671
Dual DSP board
15
673
System Services board
16
674
LED board (mounted on 675)
17
675
AC-3 decoder DSP board
18
686
Hex DAC board
19
611A
CP Interface board
20
Empty
21
Empty
Figure 8.1 DA20 circuit board locations
NOTE:
In order to comply with FCC regulations, the DA20 front panel must be in place
and held by all 12 screws during normal operation. For troubleshooting ONLY, remove
the 12 screws and the front panel and place in a safe place. After troubleshooting and
repair, all 12 screws and the front panel MUST be replaced and tightened securely.
All cards must be present in the DA20 for normal operation. A circuit trace on each card
passes a signal [LINK] to the Cat. No.673 System Services card which allows normal
operation. A similar signal [FAULT] may be asserted by a malfunctioning DSP card. Do
not remove or install cards with power on.
