Block Diagram - Power Amp Section - Sony STR-DA2ES Service Manual

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