Block Diagram - Amp Section - Sony HCD-GX255 Service Manual

6-3. BLOCK DIAGRAM – AMP Section –
DBFB
G
(Page 22)
(RG170: AEP, EE, RU)
BUFFER
VOL OUT1
(Page 22) C
IC251 (SUFFIX-11)
IC251 (SUFFIX-12)
GX255/RG170: E2, E3,
E51, EA, AR, AUS/RG470
HCD-GX255/RG170/RG470
IC441 (GX255/RG170)
IC441 (RG470: AEP, EE, RU)
IC441 (RG470: E2, E51, AR, MX)
POWER AMP
MUTING
Q251
STANDBY
R-CH
SWITCH
Q489
MUTING
CONTROL
Q261
OVER LOAD
AMP ON/OFF
DETECT
Q933
Q441
+
R-CH
LEVEL SHIFT
Q490, 491
(RG470: E2, E51, AR, MX)
GX255/RG170/
RG470: AEP, EE, RU
23 24
+
R-CH
R-CH
RY B+
TEMPERATURE
DC DETECT
DETECT
Q481, 482
Q483, 484
TH441
+
R-CH
PROTECTOR RELAY DRIVE
+ +
Q485 Q486
PROTECT
DETECT
Q487
SYSTEM CONTROLLER
IC901 (3/4) (SUFFIX-11)
IC901 (3/4) (SUFFIX-12)
23 23
HCD-GX255/RG170/RG470
HP IN
E (Page 22)
J701
R-CH
PHONES
JK441
+
L
–
FRONT SPEAKER
IMPEDANCE
+
USE 6 – 16Ω
R
–
RY441
R-CH
FAN ON/OFF M001
M M
Q044 (FAN)
D035
FAN DETECT
RELAY
Q045
SWITCH
(RG470)
Q488
+
• Abbreviation
AR : Argentina model
AUS: Australian model
E2 : 120V AC Area in E model
95
E3 : 120V AC Area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
EE : East European model
MX : Mexican model
RU : Russian model
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER