
3.
SERVO BLOCK
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
3-
1. General Description of Servo Circuits
...............................................................
33
3-
1
-
1.
Optical Pickup Control .......................................................................................... 33
3-l-2. Sled Control ........................................................................................................... 33
3-l-3. Spindle Control ...................................................................................................... 33
3-l-4. Tilt Control ............................................................................................................
33
3-l-5. Disc Loading and Chucking ..................................................................................
33
3-l-6. Disc Judgment ....................................................................................................... 33
3-2. Servo Operation at DVD Play
..............................................................................
34
3-2-l. Optical Pickup Control .......................................................................................... 34
3-2-2. Sled Control ...........................................................................................................
41
3-2-3. Spindle Control ..................................................................................................... .43
3-2-4. Tilt Control ............................................................................................................ 44
3-3. Servo Operation at CD and Video CD Playing
...............................................
46
3-3-l. Optical Pickup Control .......................................................................................... 46
3-3-2. Sled Control ........................................................................................................... 50
3-3-3. Spindle Control ...................................................................................................... 50
3-3-4. Tilt Control ............................................................................................................ 50
3-4. Disc Loading and Chucking
..................................................................................
50
3-4-l. Motor Driver ......................................................................................................... .51
3-4-2.
Tray Position Detection
........................................................................................ .5
1
3-5. Differentiation of Disk Type
...................................................................
52
3-5-l. CDlDVD Differentiation ........................................................................................ 52
3-5-2. SL/DL Differentiation ............................................................................................ 52
3-5-3. Differentiation ............
.
.......................................................................................... .52
3-6. Block Diagram (Servo)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
53
4. IC PIN DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
55
4-l. ARP CXDl865R
(IC806
on MB-80 board)
.....................................................
55
4-
1
-
1.
Block Diagram ....................................................................................................... 55
4-l-2. Pin Functions ......................................................................................................... 57
4-2. AV Decoder L64020
(IC203
on MB-78 board)
..............................................
62
4-2-
1.
Block Diagram ...................................................................................................... .62
4-2-2. Pin Assignment ...................................................................................................... 63
4-3. Digital Signal Processor
CXD8730R
(IC506
on MB-78 board)
.............. .65
4-3- 1. Pin Assignment ...................................................................................................... 65
4-3-2. Pin Functions ......................................................................................................... 66
4-4. AC-3
Decoder MB86342
(IC104
on
MB-78
board).
.................................... .70
4-4-
1.
Block Diagram ...................................................................................................... .70
4-4-2. Pin Functions .........................................................................................................
71
-4-