Denon DVM-1805 Service Manual page 29

Power Supply Block Diagram
Q Q
3 7 6 3 1 5 1 5 0
CAUTION !
Switching power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, check to see that all components in the
power supply circuit are not defective before you connect the AC plug to
the AC power supply. Otherwise it may cause some components in the
power supply circuit to fail.
HOT CIRCUIT. BE CAREFUL.
D1001, D1002
AC1001
L1001 D1004, D1005
AC CORD F1001
1A 250V
LINE
FILTER RECTIFIER
F
A V
T E
L 1 3 9 4 2 2 9 6 5 1 3
Q1008
LATCH
w w w
.
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
F
REPLACE ONLY WITH THE SAME TYPE FUSE.
A V
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
BRIDGE
2
Q1003 Q1001
SWITCHING
SWITCHING 4
CONTROL
7
6
HOT
x a o
POWER SUPPLY CBA
y
i
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8
-REPLACE FUSE AS MARKED.
T1001
D1003
11 RECTIFIER
D1030
12 RECTIFIER
D1008
SCHOTTKY
13
BARRIER
D1009
14 RECTIFIER
Q Q
3 7 6 3
D1013
SCHOTTKY
15
BARRIER
16
D1016
17 RECTIFIER
18
IC1001
ERROR
VOLTAGE DET
4 1
3 2
IC1006 REG
(SHUNT REGULATOR)
u 1 6 3
.
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9 2 4 9 8
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Q1007
IC1003
(SHUNT REGULATOR)
REG
1 5 1 5 0 8 9 2 4
IC1002
+1.8V
REG.
Q1004
Q1011
Q1005
Q1014
Q1002
Q1006
m
c o
2 9 9
CN1101
1 -FL
2 F2
3 F1
4 EV+9V
5 EV+9V
6 EV+5V
7 EV+3.3V
9 8 2 9 9
8 EV+2.5V
9 EV+2.5V
14 P-ON+1.8V
15 PWRCON
16 P-ON+12V
17 P-ON+5V
18 P-ON+3.3V
19 P-ON+3.3V