Roland SDE-1000 - Examples of RAM Failure

SDE-1000/3000
FEB. 5,1984
EXAMPLES OF RAM FAILURE
—No data on one RAM pin of Main Controller-
SDE-1000
INPUT
-18dBm 1kHz
RAM1 defective
RAM17&
IC28 pin6
5V/div
TP-3
5V/div
0.2ms/div
SDE-3000
INPUT
-10dBm 1kHz
All RAMs intact
TP-1
TR45/TR50
emitter
RAM1 (IC11)
INPUT
-18dBm 1kHz
TP-3
5V/div
IC16 pin6
2V/div
0.2ms/div
TP-3
5V/div
TP-1
20V/div
5/is/div
INPUT
-10dBm 1kHz
TP-1
TR45/TR50
emitter
0.2ms/div
TP-1
TP-2
5Ms/div
UM1 (IC11)
RAM1
RAM2 (IC10)
RAM2
RAM3 (IC9)
RAM3
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