Kurzweil K250 - Channel Board Diagnostics

4.13 - 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
U62 CJ U20 CJ
Ul02 [:J
U82
[:J
U63 CJ
U21 CJ
Ul03 CJ
U83 CJ
U64 CJ
U22 [:J
U104 [:J
U84
[:J
U65 CJ U23 CJ
U66 [:J
U24 CJ
U67 CJ
U25 CJ
U68 CJ
U26 CJ
~
U69 CJ
U27 [:J
~
U70 [:J
U28 [:J
U71 [:J
U29 [:J
U72 CJ
U30 CJ
U73 CJ
U31 CJ
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Kurzwell 250 Service Manual, Chapter 4
4·22
U125
CJ
U126
CJ
U9 CJ
R29-CJ-
R30D-
'I