Block Diagram - Amp/Video Section - Sony HCD-RG490 Service Manual

7-3. BLOCK DIAGRAM – AMP/VIDEO Section –
BASS AGC
G
(Page 24)
IC251 (EXCEPT RG490: MX/RG590: MX) IC441 (RG490)
IC251 (RG490: MX/RG590: MX) IC441 (RG590)
OUT
E
BUFFER POWER AMP
(Page 24)
STANDBY SWITCH
MUTING
Q489 (RG490)
Q251
Q489 – 491 (RG590)
R-CH
SW OUT
BUFFER LINE AMP
F
Q276 Q277
(Page 24)
MUTING
CONTROL SWITCH
Q261
21
(RG490: MX/RG590: MX)
SBSO, WFCK,
SCOR, EXCK SBSO
B
SCHMITT
WFCK
TRIGGER
(Page 23)
SCOR
IC1005
EXCK
DQ1 – DQ4
A0 – A7
D-RAM
IC1002
WE 3
OE 22
RAS 4
CAS 23
HCD-RG490/RG590
+
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
RG490: AEP, MX/
RG590: AEP, UK, MX
5
SYSTEM CONTROLLER
IC901 (3/4) (EXCEPT RG490: MX/RG590: MX)
IC901 (3/4) (RG490: MX/RG590: MX)
46 48 49
CD GRAPHICS DECODER
IC1001
VIDEO AMP
3 DATA VOUT 44
IC1006
5 SFSY
4 SBSY
VIDEO MUTING
2 CLCK
Q1010
VD0 – VD3
GDET 37
LEVEL SHIFT
MUTE 6
Q1005, 1009
VA0 – VA7
LEVEL SHIFT
XRESET 54
Q1002, 1006
13 XWE
NTSC/PAL
28 XOE DEN 52 SELECT SWITCH +3.3V
Q1001
14 XRAS
26 XCAS
59 60
X102
14.31818MHz
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
RY501
RELAY DRIVE
Q502
SUB WOOFER
SWITCH
Q274
64 22
41
RDS-DATA
RDS-CLK
Abbrivation
MX
R-ch is omitted due to same as L-ch.
SIGNAL PATH
25 25
HP IN
C
(Page 24)
J701
R-CH PHONES
JK441
+
L
–
SPEAKER
–
R
+
M001
M
(FAN)
FAN MOTOR
DETECT
Q046
JK501
+
SUB WOOFER OUT
–
PROTECT
H
(Page 26)
J803
VIDEO OUT
(Page 24)
RDS-DATA, RDS-CLK
D
(RG490: AEP/RG590: AEP, UK)
: Mexican model
: TUNER (FM/AM)
: VIDEO
HCD-RG490/RG590
Ver. 1.1