Read Sony STR-DE885 / STR-DE985 (serv.man2) Service Manual online
10
10
STR-DE885/DE985
8. BLOCK DIAGRAM — POWER SECTION —
• Signal path
: TUNER (FM/AM)
• R-ch is omitted due to
same as L-ch.
same as L-ch.
• Abbreviation
CND: Canadian model
E23 : AC 120/220/240V are
in E model
MX : Mexican model
CND: Canadian model
E23 : AC 120/220/240V are
in E model
MX : Mexican model
6
2
3
DRIVE
POWER AMP
Q421-424
CURRENT
DETECT
Q425,426
RY882
RY401
RY601
PRE DRIVER
IC400 (1/2)
IN 1
1 MUTE
+VOUT1
-VOUT1
SPEAKERS
IMPEDANCE
USE 8-16Ω
R
L
FRONT A
R
L
SURROUND
SURR
BACK
CENTER
R-CH
R-CH
R-CH
SB-CH
FR-CH
SL-CH
C-CH
R-CH
SR-CH
R-CH
TUNER/
AUDIO(1)
SECTION
A
RY911
D803
F1
F2
+3.3V
(STBY)
+2.5V
+5V-1
-7V
+7V
TU+10V
-32V
F901
F904
RECT
D921-924
T902
POWER
TRANSFORMER
D925
D1001
D927
Q821
D926
D1110
D1107
D1108
D1109
~
AC IN
OVERLOAD
DETECT
D425,Q427
8
23
12
11
DRIVE
POWER AMP
Q471-474
CURRENT
DETECT
Q475,476
-32V REG
Q801
RELAY
DRIVER
Q911
+B SWITCH
Q912,913
PRE DRIVER
IC400 (2/2)
IN 2
+VOUT2
-VOUT2
OVERLOAD
DETECT
D475,Q477
DOUBLER
RECT
6
2
3
DRIVE
POWER AMP
Q621-624
CURRENT
DETECT
Q625,626
PRE DRIVER
IC600
IN 1
+VOUT1
-VOUT1
OVERLOAD
DETECT
D625,Q627
RELAY
DRIVER
Q882
RY881
RELAY
DRIVER
Q881
RELAY
DRIVER
Q481
RELAY
DRIVER
Q681
RY501
RELAY
DRIVER
Q581
21
19
18
PROTECTOR
D752,753
Q751-753
Q751-753
POWER
MUTE
DRIVE
Q921,922
17
25
60
20
+5V
(STBY)
PROTECT AMP/
COMPARATOR
7
2
IC730
Q723
Q724
+B
-B
-BB
+2.6V/+3.3V
REG
4
5
+3.3V
2
IC1901
+3.3V
REG
1
3
IC1021
+10V
REG
1
3
IC813
-12V
+12V
+7V
REG
1
3
IC811
-7V
REG
2
3
IC812
+5V
REG
1
3
IC1031
+5V
REG
1
3
IC1011
R-CH
R-CH
-BB +B
-BB +B
-BB +B
-BB +B
R-CH
R-CH
CURRENT
DETECT
Q525,526
OVERLOAD
DETECT
D525,Q527
R-CH
R-CH
RECT
D801
D801
RECT
D861-864
RECT
D851-854
T901
POWER
TRANSFORMER
D871,872
TM602
TM601
R
FRONT B
L
R-CH
TM603
J701
PHONES
S901
VOLTAGE
SELECTOR
220V
240V
120V
SP-B-RY
HP-RY
SP-A-RY
REAR-RY
CENTER-RY
HP-CTRL
HP-RY
SP-B-RY
SP-A-RY
REAR-RY
CENTER-RY
HP_RY
SP_A_RY
REAR_RY
PROTECTOR
SP_B_RY
PW_RY
VOLT_DETECT_STOP
41
SUB-T
CENTER_RY
24
HP-CTRL
HP_CTRL
E23 M0DEL
DE985
EXCEPT
E23
M0DEL
E23
M0DEL
EXCEPT
E23
M0DEL
E23
M0DEL
E23 M0DEL
E23 M0DEL
US,CND M0DEL
US,CND,MX
MODEL
MODEL
SYSTEM
CONTROL
IC1101 (6/6)
PRE
DRIVE
6
2
3
DRIVE
POWER AMP
Q521-524
PRE DRIVER
IC500
IN 1
+VOUT1
-VOUT1
FL-CH
PRE
DRIVE
PRE
DRIVE
PRE
DRIVE
-1
-2
-3
JW907,908
F902
J911
AC
OUTLET
JW809
J911
AC
OUTLET
DE985
DE985
1 MUTE
1 MUTE
1 MUTE
119 AC MUTE
+5V
+5V
REG
1
3
IC1001
(Page 3)
