Sony STR-DB798 Service Manual

STR-DB798
1818
STR-DB798
+5V
REGULATOR
Q824
MUTING +5V
+9V
REGULATOR
IC1902
TUNER +9V
+3.3V
REGULATOR
IC1905
TUNER +3.3V
+5V
REGULATOR
IC1403
A+5V
+5V
REGULATOR
IC952
V+5V
+3.3V
REGULATOR
IC1903
+3.3V/+2.6V
REGULATOR
IC1901
+3.3V
D+3.3V
+3.3V
REGULATOR
IC1904
RECT
D54 – 57
D52
D53
T2
SUB POWER
TRANSFORMER
SYSTEM CONTROLLER
IC1703 (6/6)
AC POWER
DETECT
Q54
–5V
REGULATOR
IC951
V–5V
F1
F2
FLUORESCENT
INDICATOR TUBE
(FL1603)
FL –18V
BIAS
B–
BIAS
B+
–15V
+15V
+15V
REGULATOR
IC955
-2
-1
8Ω
4Ω
IMPEDANCE
SELECTOR
S901
(AEP, Taiwan)
T901
MAIN POWER
TRANSFORMER
42D.POWER
119LIMITER,OUT
43V.POWER
55RSTX
60STOP
1PW RY
8SUB T
B+ SWITCH
Q956, 957
STBY +3.3V
RESET SIGNAL
GENERATOR
IC1602
+5V
REGULATOR
IC1953
RECT
D908
F903
F904
RECT
D914
F1
RELAY
DRIVE
Q51
RY1
B+ SWITCH
Q1957, 1958
(AEP, UK)
D909
D1908
B– SWITCH
Q953 – 955
+2.6V
D+5V
–18V
REGULATOR
Q903
RECT
D912, 913,
915, 916
LIMITER SWITCH
Q2601, 2603
LIMITER SWITCH
Q2602
B–
+24V (RY)
B+
– 15V
REGULATOR
IC954
RECT
D903 – 906
B+ SWITCH
Q52, 53
RECT
D58
-AC IN
J50
6-6. BLOCK DIAGRAM – POWER SUPPLY Section –

Sony STR-DB798 Specifications

General

Impedance	8 Ω
Supported radio bands	FM
Radio Data System (RDS)	Yes
Channels quantity	7 channels
I/O ports	Output(Component x 1, Optical Digital x 1, Composite x 1, S-Video x 1), Input(Component x 2, Optical Digital x 4, S-Video x 4, Coaxial Digital x 2, Composite x 4)