Onkyo DX-HD805 Service Manual page 79

QQ
3 7 6 3 1 5 1 5 0
A
SCHEMATIC DIAGRAM-76
PS SECTION 1R2-P1V
1
12V
PS12VDC
REFS5V
2
T E
L 1 3 9 4 2 2 9 6 5 1 3
2
1
R9300 1k->820
3
1.25V->1.235V
DGND
www
Output voltage [1.36V]
FET [UPA2702TP]
Capacitor [2.0V 330UF 7m]
Power output control signal [PVON-S5P]
[220ohm]
Pull out circuit .
4
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B
C3268
50V 1nF(K)
GDM030000780
16V 39nF(K)
GDM030000588
H=0.8
C3267
NOT_MOUNT
R3299
3
2 1
IN-
VCC
63mW 2K(J)
[L321MF]
IC3031
GDM010001747
1
VEE
IN+
LM321MFX/NOPB
GDM470000658
DGND
Vout = VREF x ((R298 + R9300) / (R297 + R298 + R9300))
= 5 x ((10K + 820) / (33K + 10K + 820))
= 1.235V
x a o
y
i
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8
C
UPA2700TP-E2-AZ
GDM410000265
[MFNI]
Q3033
9
1R5-P1V
8
809
7
D
6
5
G
H=1.8
R3300
63mW 100K(J)
GDM010001758
2 1
100mW 470(J)
GDM010000702
5
4
OUT
Q Q
3 7 6 3
2
C3269
2
16V
100nF(K)
GDM030000572
1
63mW 10K(J)
GDM010001692
u 1 6 3
.
2 4
9 9 8
D
1
2
S
3
4
2
[CP]
+
C3270
2V
GDM030001263
1 EEFSX0D331XE
H=3.1
DGND DGND
1 5 1 5 0 8 9 2 4
m
c o
DV-HD805
2
9 9
E
1.2V 4A
1R2-P1V
POWER
330uF(M)
9 8 2 9 9