Read Sony STR-DE997 Service Manual online
STR-DE997
18
18
STR-DE997
4-7. BLOCK DIAGRAM — POWER SECTION —
8
12
11
DRIVE
POWER AMP
Q571-574
CURRENT
DETECT
Q575,576
RY240
RY2881
RY600
RY2880
PRE DRIVER
IC500
IN 2
+VOUT2
-VOUT2
SPEAKERS
IMPEDANCE
USE 8-16Ω
R
L
FRONT B
L
SURROUND
SURROUND
BACK
CENTER
R
R-CH
R-CH
R-CH
FL-CH
FR-CH
SL-CH
C-CH
R-CH
SBR
R-CH
SR-CH
R-CH
TUNER/
AUDIO
SECTION
D
RY911
RY802,803
D251
F1
F2
-32V
+3.3V
(STBY)
+2.6V
+5V-1
-7V
+7V
TU+10V
-48V
RECT
D921-924
D925
D927
Q921
D926
D1001
+B SWITCH
Q912,913
D1110
D1111
D1107
D1108
OVERLOAD
DETECT
D575,Q577
6
23
2
3
DRIVE
POWER AMP
Q721-724
CURRENT
DETECT
Q725,726
-48V REG
Q235
+48V REG
Q220,225
RELAY
DRIVER
Q911
PRE DRIVER
IC700
PRE DRIVER
IC400
IN1
+VOUT1
-VOUT1
OVERLOAD
DETECT
D725,Q727
8
12
11
DRIVE
POWER AMP
Q671-674
CURRENT
DETECT
Q675,676
PRE DRIVER
IC600
IN 2
+VOUT2
-VOUT2
OVERLOAD
DETECT
D675,Q677
RELAY
DRIVER
Q240
RELAY
DRIVER
Q2880
RELAY
DRIVER
Q600
RY400
RELAY
DRIVER
Q400
RY700
R
L
R-CH
-32V
D290
D291
RELAY
DRIVER
Q700
21
18
42
PROTECTOR
D201-203
Q200-202,255,256
24
25
60
20
+5V
(STBY)
OVERLOAD
DETECT AMP
7
2
IC210
+48V
-B
+2.6V/+3.3V
REG
4
5
+3.3V
2
IC1901
+5V-2
+5V
REG
1
3
IC1001
+3.3V
REG
1
3
IC1021
+5V
REG
1
3
IC1011
+10V
REG
1
3
IC1902
-15V
+15V
+7V
REG
3
1
IC260
-7V
REG
2
3
IC265
+5V
REG
1
3
IC1031
PROTECTOR
Q210
+B
R-CH
R-CH
R-CH
R-CH
R-CH
R-CH
-48V +48V
R-CH
R-CH
R-CH
RECT
D801,802
RECT
D865
D865
RECT
D851-854
T901
POWER
TRANSFORMER
TM2880
TM602(1/2)
TM601
TM602(2/2)
R
FRONT A
L
R-CH
J2501
PHONES
HP-RY
FRONT B RY
FRONT A RY
REAR-RY
CENTER RY
HP CTRL
HP-RY
HP DETECT
FRONT B RY
FRONT A RY
REAR-RY
CENTER RY
HP_RY
SP_A_RY
REAR_RY
PROTECTOR
HP_CTRL
PW-RY
5
SUB-T
19
SP_B_RY
45
BRIDGEABLE RY
VOLT_DETECT_STOP
CENTER_RY
SYSTEM
CONTROL
IC1101 (
5/5)
PRE
DRIVE
PRE
DRIVE
SBL-CH
8
12
11
DRIVE
POWER AMP
Q471-474
CURRENT
DETECT
Q475,476
IN2
+VOUT2
-VOUT2
OVERLOAD
DETECT
D475,Q477
-48V +48V
-48V +48V
-48V +48V
PRE
DRIVE
PRE
DRIVE
RELAY
DRIVER
Q2881
RELAY
DRIVER
Q809
R861
R862
R851
RELAY
SWITCH
-32V REG
Q250
F902
T902
POWER
TRANSFORMER
~
AC IN
J911
AC
OUTLET
F901
• Signal path
: TUNER (FM/AM)
• R-ch is omitted due to
same as L-ch.
same as L-ch.
(Page 13)
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