Text preview for : 251571 schematics.pdf part of BOSE 251571 schematics BOSE Audio AM-25-2 251571 schematics.pdf
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+3.3V +5V
+3.3V
+12V +3.3V
-12V
+12V
+5V +5V
147239
+5V
+5V
+12V
10V TURN-ON 147239
PG3 C/6 147239
-12V +12V -12V
+12V
+12V
147239
147239
-12V
147239
+5V
+5V
+5V +5V
+10.9V +5V
+5V
+5V
+5V
+12V
Power supply voltages drop to zero when console is turned off.
+5V +5V
+5V
+5V
5V
+5V
+5V
+5V
+5V
+5V +3.3V
+3.3V
+5V
+5V
+5V
5V 0V
+5V
+5V
+5V
+5V
+5V
Power supply voltages drop to zero when console is turned off.
12V
10V TURN ON
PG1 C/8 11.3V
9.8V
9.1V
1.2V
1.9V
1.2V
Power supply voltages drop to zero when console is turned off.
Power supply voltages drop to zero when console is turned off.
0V
NOTE - At power down, 5V will be present at the base of Q500
PG2 B/4 for approximately 5 seconds to allow pin 19 of U500 to be pulled
low, shutting off the regulator. The 3.3V supply is turned off as
part of the normal power down sequence.
12.5V
+3.3V
+3.3V
1.5V
+17V
Power supply voltages drop to zero when console is turned off.