Denon DN-D4500 Service Manual page 21

AN8785SB (IC102,202)
1
7
8
14
AN22002A (IC103,203)
1
16
L: All mute
Hiz: ch2,4 ON
H: Active
Standby PVcc2
28
16 10
22
Standby
Band-gap
Vcc/Vref
Reser Circuit
21
1.25V
15
7
IN2+
0.1
(2.5V)
32
A
+
C
-
B
+
D
17
-
F
-
E
-
VREF
[ Others ]
[ Loading ] [ Traverse ] [ Spindle ]
D2- D2+ D4- D4+ D3- D3+
M
M M
12 11 18 17 14 13
- + - + - + - + - + - +
- + - +
- +
switch
9 21 15 20
8
ch.4 SW
H:2.5V
L or
:Vref
IN3
IN2- IN4 PGnd2
HIZ
CAGC ARF
RFN
4 5 6 7
RFOUT
AGC
RF_EQ
NRFDET
A
32
AMP GCA BCA
C
31
B
30
AMP GCA BCA
D
29
27
BCA
AMP GCA
E
F
28
BCA
AMP GCA
17
24 26
21
DN-D4500 / BU4500
[ Focus ] [ Tracking ]
PVcc3 D1- D1+ D5- D5+
19 1 28 26 25
Protection
Circuit
- + - + - + - +
- +
- +
23 27 22
2
IN1 IN5 SVcc SGnd-Fin
PGnd1
CBD0 BD0 C0FTR 0FTR
8 11 12 13 14
BD0 0FTR
9
CEA
3TENV 10
15
NRFDET
FEN
22
-
SUB
23
FEOUT
TEN
21
-
SUB
20
TEOUT
TEBPF
19
VDET
VDET
18
-
2
LD
PD
1
25 16 3
GND VCC
PVcc1
24
4
IN-
5
IN+
3
OUT
6
Vref
3TOUT