Block Diagram - Power Section - Sony STR-DE925 Service Manual

3-3. BLOCK DIAGRAM – POWER SECTION –
+B
-B
L
+B
-B
C
A
W
+B
-B
SL
MUTE
AC MUTE
Q501,503
PROTECTOR
RY HP
B
RY FRONT A
FRONT B
RY CENTER
RY WOOFER
RY REAR
RY POWER
STOP
URESET
USREQ
UMREQ
UCLOCK
D
UDATA
SOTO
SINO
MD2
MD0
IC106
UP 8 3 55 UP
MOTOR
DRIVE
B
7 2 56
DOWN DOWN
LED VOL 88 LED VOL
S-LINK
US,CND MODEL
95 96
Q253
J258 BUFFER
TV/DBS
6
ST-I/O
J257 11
IC251 IC251
Q251,252
MONITOR 4
SWITCH
3
J255 1
2
Q255,256
VIDEO 1
LEVEL
IC254
CONTROL
IC254 IC254
5
J256 7
Q257,258 6
VIDEO 2
LEVEL
CONTROL
Q254
LEVEL
CONTROL
16
POWER AMP(L)
IC501
13 VCC
BOOSTER
14 VCC +VE 2
Q506
15 VEE
LIMITER
Q504
6 IN NF 5
LIMITER
Q505
PROTECTOR
1 MUT
Q509,510
BOOSTER CUR DET
-VE 3
Q507 Q508
POWER AMP(C/W)
IC601
13 VCC
BOOSTER
14 VCC +VE 12
Q606
15 VEE
LIMITER
Q604
8 IN
NF 9
LIMITER
Q605
PROTECTOR
Q609,610
BOOSTER CUR DET
-VE 11
Q607 Q608
1 MUT
+VE 2
6 IN -VE 3
POWER AMP(SL)
IC701
13 VCC
BOOSTER
14 VCC +VE 2
Q706
15 VEE
LIMITER
Q704
6 IN NF 5
LIMITER
Q705
1 MUT
BOOSTER CUR DET
-VE 3
Q707 Q708
PROTECTOR
Q547-549
D111-113
D109,110 D114,115
D116-118
LED LED LED
DRIVE DRIVE DRIVE
Q111-113
Q109,110 Q114,115
Q118-116
49 51 20 19 61 62 60 59 1 2 6 7 3 4 5
MODE CONTROL
IC102
93 94 38 39 40 41 43 44
FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION FUNCTION
KEY KEY KEY KEY KEY KEY
S106,110,114,118 S105,109,113,117 S104,108,112 S103,107,111 S102 S140-145,147 S132,133
S122,126,128,130 S121,125,127,129 S116,120,124 S115,119,122 S135-139,146
MUTING
— 11 —
RY602
RELAY
DRIVE
Q601
Q511
RY501
RELAY
DRIVE
Q546
D1202
RY502
RELAY
DRIVE
Q596
RY601
Q611 D1203
RELAY
DRIVE
Q645
RY503
RELAY
DRIVE
Q544
RY701
RELAY
DRIVE
Q749
S501
IMPEDANCE
SELECTOR
D100,108
D101 D104-106
D119,122
LED LED LED
DRIVE DRIVE DRIVE
Q103,104 Q107,108
Q102 X101
Q106 Q119,122
10 9 8 90 16 15 14 92 89 87 91 82 83
SIRCS 26
URESET
58
RESET 77
STOP 47
72 73 74 21 24 25 24 67 63 98
SPEAKER
SWITCH
S134 S131 34 26 24 29 4 5 30
Q180
POWER I/O
BUFFER
DIN 29 3 DOUT
IC104 IC105
FL DRIVE FL DRIVE
F2 F1
FL101
FLOURESCENT
INDICATOR TUBE
R CH
J701
PHONES
L
TM501
FRONT
SPEAKER
R
R CH
C
TM701
S(L)
SURROUND
SPEAKER
S(R)
IC404
R CH
+5V
1 3
TU +5V
REG
J501
IC403
WOOFER
+12V
TU +12V 3 1
REG
IC401
+15V
+15V 1 3
REG
IC402
CNJ701
-15V
R CH -15V 3 2
REG
WIRELESS
REAR
SPEAKER
IC702
+18V SWITCH
3 1
REG Q747,748
+B
Q801
SWITCH +32V
+32V
Q614,618 REG
-B
SWITCH SWITCH INV SW
Q612,615 Q613,616 Q617
IC809 IC809 +24V
+5V
8
1 3
REG
4
-24V
IC801
5V
D5V 3
REG
IC802
+3.3V
D3.3V 3
REG
IC803
+3.3V
D3.3V 3
REG
IC101
Q101
REMOTO
CONTROL
RECEIVER
DELAY
+5.6V +B SW
Q902
RESET
Q105
D901-904
3
POWER
8 CONT 5
IC901
6
RESET
5 14
I/R
Q181
CONT
Q182
IC181
I/O IC180 Q183,184 D184-186
11
BUFFER
33 I/R LED
DET DRIVE
2
12
15 16
X102
7.28MHz
J204
S-LINK
— 12 —
STR-DE925/V919
• RCH is omitted
• Signal Path
:FM
:CD
• Abbreviation
CND :Canadian
EA :Saudi Arabia
MY :Malaysia
SP :Singapore
CH :Chinese
E, EA, PX MODEL
VS901
VOLTAGE
SELECTOR
T901
F904
D801 F801
JW903
EXCEPT
E, EA, PX
F802
MODEL
F803
D802-805
F804
F805
D808
1
1
F2
1 F1
MY, SP, CH MY, SP
RY901
MODEL MODEL
RELAY
CNJ901
DRIVE F903
Q901
US,CND US, CND, E, EA, CH, PX
MODEL MODEL
JW925 CNJ901
T902
CNP901
AC IN