Block Diagram -Sub Woofer Section - Sony HCD-GX45 Service Manual

HCD-GX45/RG440
5-5. BLOCK DIAGRAM — SUB WOOFER SECTION —
AMP/POWER SUPPLY
M
SECTION
(Page 27)
SW MUTE
SUBWOOFER SUBWOOFER
AMP AMP
SW IN
IC302 IC312
MUTE
Q528
SUBWOOFER
LIMIT SWITCH
Q309
AMP/POWER SUPPLY
SECTION
(Page 27)
SWITCHING
+VH
Q416
+VL
SWITCHING
Q424-426 –VH
–VL
CURRENT
BIAS
MIRROR
Q408,409
Q403,404
PRE DRIVE CASCADE FINAL DRIVE
Q401,402 Q405-407 Q410,411
OVERLOAD
HOLD +
HOLD
Q414
OVER CURRENT
VCC
DETECT
(+10V)
N Q415
THERMAL
TH401 DETECT
Q420,421
DC DET
28 28
OUTPUT LEVEL
DETECT
Q417,419
OUTPUT LEVEL
DETECT
Q422,423
JK401
SUBWOOFER
OUT
RY401
TUNER/TAPE/PANEL
L
SW ON/OFF SENS
DETECT
(Page 26)
Q412
RELAY
CN402
2
DRIVE
CONTROL
Q413
1
+
SECTION