Power Section - Sony HCD-VX90AV Service Manual

– POWER SECTION –
RY-SW
FRONT L-IN
STK MUTE
FRONT RELAY
AC DET
SPEAKER PROTECT IN
PROLOGIC RELAY
REAR L-IN
D
CENTER-IN
MAIN
SECTION
(Page 26)
VREF
+5.6V (STBY)
+5V (STBY)
(DISPLAY)
POWER ON/OFF
CD A+5V (SW)
ST A+10V
CD POWER
09
IC801
2CH
Lch
20
15
21
OVER LOAD DET
16
Q801
–VH SUPP
Rch
–VH
Q831
+VH BUFF
+VH
Q821
Q822
MUTE
PROTECT OUT PROTECT SW
Q825, 826 Q828 – 830
IC1001 (1/2)
1CH
12
8
13
OVER LOAD DET
Q1001
6 7
THERMAL DET
Q1023, 1024
Rch
IC1001 (2/2)
3CH
18
20
17
CCC
OVER LOAD DET
14
Q1001
+VL BUFF
+VL –VL
Q1021
Q1022
MUTE
JW909
RECTIFIER
D502
CD D+5V (SW)
RDS D+5V UN SW
+5V (LED) RECTIFIER
(DISPLAY) D918
D+5V UNREG
D509
+5V OUT
CDM D+5V SW
Q906
SWITCH
Q907
SWITCH
Q904, 905
+5V REG
Q908
Q909
+10V OUT IC904
3 1
Q910 12V REG
A+10V
– 27 –
RY881
RELAY DRIVE
+VH
Q881
SWITCH
Q882
Q421
Q411
MUTE
PROTECT
Q832, 827
Rch
REAR L OUT
OVER LOAD DETECT
CENTER OUT
T951
POWER TRANSFORMER
+VH
RECT
AC1
+5V OUT IC905
3 1 D881
–VH
Q915 +5V/REG
AC2
+VL
RECT
AC2
D883
–VL
Q916
AC1
IC901
3 1
REG
+7V REG
RECTIFIER
A+7V
AC DET
Q901,902,903
D931, 932
AC3
RECT
D901-904
–7V REG
A–7V
AC3
Q951,952,953
AC4
RECT
IC902
CD MOTOR +7V 3 1
D908-911
+7V REG
AC4
TC MOTOR +12V
+10V REG
IC903
3 1
Q913
+12V REG
SWITCH
Q914
TM801
FRONT
L-ch
Rch R-ch
J701
PHONES
Rch
Lch
RY-SW
–12V
FAN MOTOR
FAN DET
SWITCH
Q431, 432
TM802
SURROUND
RY882
REAR L-ch
RELAY DRIVE
Rch
+VH
REAR R-ch
Q883
CENTER
SWITCH
Q884
RY883
RELAY DRIVE
+VH
Q885
SWITCH
Q886
VOLTAGE
SELECTOR
S951
AC
IN
– 28 –
HCD-VX90AV