Read Sony STR-DA2ES / STR-DB1080 Service Manual online
16
16
STR-DA2ES/DB1080
6-4.
BLOCK DIAGRAM – POWER AMP Section –
• SIGNAL PATH
• R-CH is omitted due to same as L-CH.
: TUNER
+
+
–
–
TM501
PRE
DRIVE
DRIVE
BIAS
CIRCUIT
BIAS
Q431
BOOSTER
Q402
BOOSTER
Q403
K
6
13 14
15
3
2
5
POWER AMP
IC403
POWER AMP
IC603
(Page 15)
L OUT
INPUT
–VEOUT
+VEOUT
NF
PRE
DRIVE
DRIVE
BIAS
Q631
BOOSTER
Q602
BOOSTER
Q603
L
8
11
12
9
(Page 15)
C OUT
INPUT
–VEOUT
+VEOUT
PRE
DRIVE
DRIVE
BIAS
Q681
BOOSTER
Q652
BOOSTER
Q653
N
6
3
2
(Page 15)
SB OUT
INPUT
–VEOUT
+VEOUT
NF
NF
VCC VCC VEE
PRE
DRIVE
DRIVE
BIAS
CIRCUIT
BIAS
Q531
BOOSTER
Q502
BOOSTER
Q503
M
6
13 14
3
2
5
POWER AMP
IC503
SYSTEM CONTROLLER
IC1703 (5/7)
(Page 15)
SL OUT
INPUT
–VEOUT
+VEOUT
NF
VCC VCC
VCC VCC
VEE
VEE
13 14
15
15
5
BIAS
CIRCUIT
AF POWER
SENSOR
Q434
CURRENT
DETECT
Q432, 433
AF POWER
SENSOR
Q634
CURRENT
DETECT
Q632, 633
AF POWER
SENSOR
Q684
CURRENT
DETECT
Q682, 683
AF POWER
SENSOR
Q534
CURRENT
DETECT
Q532, 533
5
1
118
2
3
6
10
REAR RY
H. P IN
PROTECTOR
SP A RY
4
SP B RY
H/P RY
CENTER RY
SB RY
RELAY
DRIVE
Q823
RY806
R-CH
RELAY
DRIVE
Q808
RY448
RELAY
DRIVE
Q809
RY803
RELAY
DRIVE
Q807
RY801
D803
D802
PHONES
CENTER
SURROUND BACK
L
R
J849
+
+
–
–
TM449
–
–
+
+
R-CH
R-CH
SURROUND
L
R
LIMITER SWITCH
Q791.795
AF POWER
PROTECTOR
Q802, 803,
Q805
FRONT A
SPEAKERS
IMPEDANCE
USE 4-16Ω
–1
SPEAKERS
IMPEDANCE
USE 4-16Ω
–2
RELAY
DRIVE
Q444
RY444
L
R
+
+
–
–
TM444
R-CH
FRONT B
SPEAKERS
IMPEDANCE
USE 4-16Ω
B+
LIMITER SWITCH
Q790
B–
OVER LOAD
DETECTOR
IC803, Q804
(EXCEPT DB1080: E)
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