Kurzweil K250 - Page 130

4.31 - CHANNEL BOARD TESTS
The following diagram of the Channel board shows the
component
placement of the integrated circuits which will be probed
using an
oscilloscope during the 'following Channel board test
procedure. The point of view of this diagram is from the back of the
instrument,
looking down onto the Channel board.
NOTE: The oscilloscope must be grounded to the K250 chassis
ground.
CHANNEL BOARD COMPONENT PLACEMENT
Ul02 CJ
Ul03 CJ
Ul04 CJ
~
~
'--
'--
U62 [:J
U20 CJ
U82
[:J
U63 [:J
U21 CJ
U83
[:J
U64 CJ U22 CJ
U84
[:J
U65 [:J
U23 CJ
U66 [:J
U24 CJ
U67 [:J
U25 CJ
U68 [:J
U26 CJ
U69 [:J
U27 CJ
U70 [:J
U28 CJ
U71 [:J
U29 CJ
U72 [:J
U30
CJ
U73 [:J
U31 CJ
Kurzweil 250 Service Manual, Chapter 4
4-60
U125
[:J
U126
CJ
U9 CJ
R29-CJ-
R30 c::J-
(