Compaq LA36 Service Manual page 126

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5.3.9 Control panel control
*OPDOT
*LOAD
Internal
*SHIFT
control
*BKSI
circuit
+5V
SGI
*SDIN
BZCLK
MB623829
Serial-to-
parallel
converter
Parallel-to-
serial
converter
Figure 5.39 Control panel block diagram
+5V
LEDs
+5V
Switches
SG1
Buzzer
SG1

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