Sony STR-DB780 Service Manual

1818
STR-DA1ES/DB780
5-6. BLOCK DIAGRAM – POWER SUPPLY Section –
+5V
REGULATOR
Q824
+5V
+10V
REGULATOR
IC1902
TUNER +10V
+3.3V
REGULATOR
IC1905
TUNER +3.3V
+5V
REGULATOR
IC1503
A+5V
+5V
REGULATOR
IC1906
VIDEO +5V
+2.5V/+3.3V
REGULATOR
IC1901
+5V
REGULATOR
IC1903
D+2.5V
D+3.3V
D+5V
D909
+3.3V
REGULATOR
IC1904
RECT
D54 – 57
D52
D53
T2
SUB POWER
TRANSFORMER
SYSTEM
CONTROLLER
IC1601
(5/5)
AC POWER
DETECT
Q54
– 5V
REGULATOR
Q902
VIDEO – 5V
F1
F2
FLUORESCENT INDICATOR TUBE
(FL1601)
– 30V
– 30V
REGULATOR
Q903
RECT
D912, 913
– 15V
REGULATOR
IC802
– 15V
+15V
+15V
REGULATOR
IC801
RELAY +24
B+
B–
-2
-1
8Ω
4Ω
IMPEDANCE
SELECTOR
S901
L001
MAIN POWER
TRANSFORMER
77
RSTX
55
FUSE DETECT
48STOP
66POWER RELAY
STBY +3.3V
RESET SIGNAL
GENERATOR
IC1602
RECT
D903 – 906
RECT
D908
F904
F903
RECT
D914
F1
RELAY
DRIVE
Q51
RY1
(AC IN)
(DB780: TW)
(DA1ES/DB780: SP, MY)
(DA1ES/DB780: SP, MY, TW)
AC OUTLET
CNJ1
(DB780: AEP, UK)
F2
• Abbrivation
MY : Malaysia model
SP : Singapore model
TW : Taiwan model
F905
F906
(EXCEPT DA1ES/DB780: TW)
(EXCEPT DA1ES/DB780: TW)
(DA1ES/DB780: TW)

Sony STR-DB780 Specifications

General

Type	Stereo Receiver
Total Harmonic Distortion	0.09 %
Digital inputs	2 Optical, 1 Coaxial
Weight	10.5 kg
Video inputs	composite
Video outputs	1 composite, 1 S-Video
Output Power	100 Watts (8 Ohms, 20 Hz - 20 kHz, 0.09% THD)
Signal-to-Noise Ratio	96 dB (Line in)
Input Sensitivity	150 mV (Line in)