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.