Denon DVM-4800 Service Manual page 38

Q Q
3 7 6 3 1 5 1 5 0
1 2
SERVO BLOCK DIAGRAM (1/2)
OPTICAL PICK UP UNIT
PHOTO DETECTOR
B1 B2
A1 A2
A4 A3
HEAD
AMP
B4 B3
LASER DIODE
LASER DIODE
T E
L 1 3 9 4 2 2 9 6 5 1 3
IC6201
(CPU)
65
67
w w w
6
77
.
76
http://www.xiaoyu163.com
3 4
IC5201 (FEP)
VIN11
62
VIN12
63
VIN1
57
VIN2
58
VIN3 AMP
59
VIN4
60
VIN5,7 49
51
VIN6,8 50
52
VIN9
53
VIN10
54
Q5211
LD DRIVE 2
1
LPC
Q5215
AMP
LD DRIVE 4
3
HDTYPE
64
RFINP
47
RFINN
48
RFDIFO
34
EQ
EQ
EQ
POFLT
8 MIRRO DET.
RFC
37
Q5271
DSLFLT
AMP 32
x a o u 1 6 3
y
i
8
5
TBAL
FBAL
ADD
SW
ADD
Q Q
3 7 6 3 1
ADD
ADD
+
-
ADD
EQ
DIFFERENTIAL
TBAL PHASE
DET.
c o
.
9 2 4 9 8
6 7
+
-
-
+
-
+
+
-
LEVEL
CONT.
BDO
EQ
DET.
VCL.
ADJ.
OFTR
DET.
FC BOOST
CONT. CONT.
LEVEL
VGA
AGC
CONT.
CONT.
5 1 5 0 8 9 2 4 9
+
-
+
-
-
+
+
-
+
-
+
-
REG
S-LINE
J-LINE
m
SERVO BLOCK DIAGRAM
DVM-4800
2 9 9
8
IC2001
A
(ODC/DSC)
RFENV
41 120
BOTTOM
A
HOLD 42
PEAK
43
17
TE
18 118
TBAL
6 65
FE
22 117
FEN
21
FBAL
7 66
B
VHALF
29
VREF2
27
BDO
40 52
OFTR
39 51
8 2 9 9
AGCO
45
AGCG
44
AS
20 119
AGCOFST
23
AGCBAL
C
19
NARF
30 110
-
+
ARF
31 111
AGCLVL
25
DCFLT
32
TESTSG
46
VFOSHORT
5
DCRF
38
RFOUT
35 124
D
FEPCLK
13 54
FEPDATA
14 53
FEPENB
SIF 12 55
STANBY
11
IDGT
10
DTRD
9
RSCL
15
JLINE
16
NCS
34
ODCIRQ
2
E
ADSCIRQ
5
B
38