Denon DVM-4800 Service Manual page 39

Q Q
3 7 6 3 1 5 1 5 0
1 2
SERVO BLOCK DIAGRAM (2/2)
IC2001 (ODC/DSC)
A
67
114
115
68
T E
L 1 3 9 4 2 2 9 6 5 1 3
70
71
FG 69
FG ENB 56
w w w
61
.
B
3
IC2501
(MOTOR DRIVE)
TRSDRV TRIN
26
BIAS1
TRTRV VIN1
2
DAC1 VIN2
3
SPDRV VIN3
23
OPOUT
6
FROM LDIN
24
IC6001-27,28PIN
TIL TP
CH3
27
MUTE
TILT
CH1,2
9
MUTE
FG
x a o
y
IN SW
i
SW2601
http://www.xiaoyu163.com
8
4 5
RF SIGNAL
-
+
+
-
Q Q
-
3 7 6 3
+
BIAS2
-
+
-
+
u 1 6 3
.
9 2 4 9 8
6 7
MOTOR DRIVE SIGNAL TRACKING ERROR SIGNAL
VO4+
15
-
+
LEVEL
VO4-
SHIFT
16
-
+
OPIN+
4
VO3+
17
-
+
LEVEL
VO3-
SHIFT
18
-
+
OPIN-
5
1 5 1 5 0 8 9 2 4
IC2511-11,12,13,14
7.2Vp-p(20usec./div.)
-
VO1+
+ 14
LEVEL
VO1-
SHIFT
13
-
+
VO2+
12
VO2-
- 11
+
LEVEL
SHIFT
-
+
LD CNT
CNT 28
MUTE4
CH4
20
MUTE
m
c o
FROM
P6002-1PIN
SERVO BLOCK DIAGRAM
DVM-4800
2 9 9
8
FOCUS ERROR SIGNAL
A
M2502
TRAVERS MOTOR
M2501
SPINDLE MOTOR
B
9 8 2 9 9
OPTICAL PICK UP UNIT
ACTUATOR
FOCUS
COIL
C
ACT T+
ACT T-
TRACKING
COIL
ACT F+
ACT F-
D
IC6001
(SUB CPU)
TRAY/TRV
47
TRAY/MUT
31
TRAY CLOSE
38
E
TRAY OPEN
37
39