Block Diagram − Power Supply Section - Sony STR-DB798 Service Manual
Fm stereo fm/am receiver
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Also See for STR-DB798:
- Service manual (96 pages) ,
- Operating instructions manual (64 pages) ,
- Easy setup manual (2 pages)
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STR-DB798
STR-DB798
6-6. BLOCK DIAGRAM – POWER SUPPLY Section –
MUTING +5V
TUNER +9V
TUNER +3.3V
(AEP, UK)
A+5V
V+5V
D+3.3V
+3.3V
LIMITER,OUT
119
+2.6V
D.POWER
42
V.POWER
43
SYSTEM CONTROLLER
IC1703 (6/6)
STBY +3.3V
RSTX
55
SUB T
8
STOP
60
PW RY
1
+5V
REGULATOR
Q824
BIAS
LIMITER SWITCH
B–
Q2602
+3.3V
+9V
BIAS
LIMITER SWITCH
REGULATOR
REGULATOR
B+
Q2601, 2603
IC1905
IC1902
+5V
+15V
REGULATOR
REGULATOR
IC1403
IC955
+15V
– 15V
–15V
REGULATOR
IC954
–18V
FL –18V
REGULATOR
Q903
+5V
B+ SWITCH
REGULATOR
Q956, 957
IC952
D+5V
+3.3V
REGULATOR
IC1903
+3.3V/+2.6V
+5V
B+ SWITCH
REGULATOR
REGULATOR
Q1957, 1958
IC1901
IC1953
–5V
V–5V
REGULATOR
IC951
+3.3V
REGULATOR
IC1904
RESET SIGNAL
GENERATOR
IC1602
18
18
(AEP, Taiwan)
S901
IMPEDANCE
SELECTOR
8Ω
4Ω
-1
B–
RECT
D914
-2
B+
+24V (RY)
RECT
D903 – 906
F1
FLUORESCENT
INDICATOR TUBE
(FL1603)
F2
RECT
D912, 913,
915, 916
F904
D1908
RECT
D908
F903
B– SWITCH
Q953 – 955
D909
D52
RECT
D54 – 57
D53
B+ SWITCH
RECT
Q52, 53
D58
AC POWER
DETECT
Q54
T901
MAIN POWER
TRANSFORMER
F1
T2
SUB POWER
TRANSFORMER
J50
-AC IN
RY1
RELAY
DRIVE
Q51
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