Block Diagram - Amp/Video Section - Sony HCD-RG295 Servise Manual

Q Q
3 7 6 3 1 5 1 5 0
7-3. BLOCK DIAGRAM – AMP/VIDEO Section –
BASS AGC
G
(Page 24)
IC441 (RG295/RG495)
IC441 (RG595)
OUT
BUFFER
E
POWER AMP
IC251
(Page 24)
STANDBY SWITCH
MUTING
Q489 (RG295/RG495)
Q251
Q489 – 491 (RG595)
R-CH
SW OUT
BUFFER LINE AMP
F
Q276 Q277
T E
L 1 3 9 4 2 2 9 6 5 1 3
(Page 24)
(RG495/RG595)
MUTING
CONTROL SWITCH
Q261
21
w w w
HCD-RG295/RG495/RG595
+
TH441
OVER LOAD TEMPERATURE
DC DETECT
DETECT DETECT
Q481, 482
Q441 Q483, 484
+
R-CH
+ +
+ +
TEMPERATURE OVER LOAD
DC DETECT
DETECT DETECT
Q505, 506
Q503, 507 Q501
BUFFER POWER AMP
Q271 IC501
MUTING
Q272
5
SYSTEM CONTROLLER
IC901 (3/4)
x a o
y
. i
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R-CH
–1
–2
R-CH
RY441
RELAY B+
FAN MOTOR
R-CH DRIVE
Q043 – 045
D035
PROTECTOR RELAY DRIVE
Q485 Q486, 488
PROTECT
+
DETECT
Q487
Q Q
3 7 6
RY501
RELAY DRIVE
Q502
SUB WOOFER
SWITCH
Q274
64 22
u 1 6 3
.
25 25
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2 4
8 9 9
HP IN
(Page 24)
C
J701
R-CH PHONES
JK441
+
L
–
SPEAKER
–
R
+
M001
M
(FAN)
FAN MOTOR
DETECT
Q046
JK501
+
3 1 5 1 5 0 8 9 2
SUB WOOFER OUT
–
PROTECT
H
(Page 26)
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: TUNER (FM/AM)
m
c o
HCD-RG295/RG495/RG595
2
8 9 9
4 9 8 2 9 9