5
CIRCUIT OPERATIONAL DESCRIPTION
) Motor Drive IC: AT5888S
The AT5868S is a 5-channel BTL driver IC for driving the motors and actuators in products
such as CD-ROM/DVD-ROM/DVD-Player drives. Two of the channels use current feedback to
minimize the current phase shift caused by the influence of load inductance. Driver IC gener-
ates the focus signal and the tracking signal for pick-up actuator, the sled signal for feed,
spindle signal and the load signal for opening and closing of the tray. The focus signal, the
tracking signal, the sled signal and the spindle signal are input into each relaxant port of
the drive IC(in the order of No. 26 pin, 23, 4, and ) and set the gain amplification and the
center voltage through the internal OP-AMP and drive on both sides and then the focus sig-
nal and the tracking signal will be output as VOFC+, VOFC- and VOTK+, VOTK- on actuator,
the sled signal and the spindle signal will be output as VOSL+, VOSL- and VOLD+, VOLD- on
each motor. For the load signal the input opening/closing signal is output as VOTR+, VOTR-
through the loading PRE FWD REV circuit.
Motor Drive IC (AT5888S) Block Diagram
Actuator
Driver(6x)
MUTE
Actuator
Driver(6x)
Spindle
Driver(4X)
Sled
Driver(4X)
Thermal
Shut down
+
-
+
-
10K
25K
GND
Vcc2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
8
9
10
11
12
13
14
1
2
3
4
5
6
7
PGND
25K
10K
Vcc1
PGND
Vcc2
Vcc2
Vcc1
Pre-DRV
TRAY
DRIVER
VCTL
FWD
REV
TRB_2
NC
NC
REGO2
TRB_1
REGO1
VOTR-
VOTR+
VOSL+
VOSL-
VOFC-
VOFC+
VOLD-
VOLD+
VOTK-
VOTK+
-
+
-
+
VINSL+
VINFC
MUTE
BIAS
VINTK
VINLD
GND
VCC2
VCC1
10K
25K
15K
10K
- +
+
-
CIRCUIT OPERATIONAL DESCRIPTION
Sm(DAEWOO_DG-K51X)051229.indd 5
2005-12-30 11:46:59
Содержание DG-K512
Страница 14: ...13 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 13 2005 12 30 11 47 06 ...
Страница 16: ...CIRCUIT DIAGRAM 15 2 RF MPEG SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 15 2005 12 30 11 47 11 ...
Страница 17: ...CIRCUIT DIAGRAM 16 3 SDRAM FLASH SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 16 2005 12 30 11 47 14 ...
Страница 18: ...CIRCUIT DIAGRAM 17 4 VIDEO OUTPUT PORT SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 17 2005 12 30 11 47 16 ...
Страница 19: ...CIRCUIT DIAGRAM 18 5 AUDIO OUTPUT PORT SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 18 2005 12 30 11 47 21 ...
Страница 20: ...CIRCUIT DIAGRAM 19 3 CONTROL BOARD SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 19 2005 12 30 11 47 24 ...
Страница 22: ...CIRCUIT DIAGRAM 21 5 YUV BOARD SCHEMATIC DIAGRAM Sm DAEWOO_DG K51X 051229 indd 21 2005 12 30 11 47 26 ...
Страница 23: ...22 PCB CIRCUIT BOARD 1 POWER SUPPLY BOARD Sm DAEWOO_DG K51X 051229 indd 22 2005 12 30 11 47 27 ...
Страница 24: ...PCB CIRCUIT BOARD 23 2 DECODE BOARD Sm DAEWOO_DG K51X 051229 indd 23 2005 12 30 11 47 36 ...
Страница 25: ...PCB CIRCUIT BOARD 24 Sm DAEWOO_DG K51X 051229 indd 24 2005 12 30 11 47 40 ...
Страница 26: ...PCB CIRCUIT BOARD 25 3 CONTROL BOARD DG K512 Sm DAEWOO_DG K51X 051229 indd 25 2005 12 30 11 47 41 ...
Страница 27: ...PCB CIRCUIT BOARD 26 CONTROL BOARD DG K514 Sm DAEWOO_DG K51X 051229 indd 26 2005 12 30 11 47 41 ...
Страница 28: ...PCB CIRCUIT BOARD 27 CONTROL BOARD DG K515 Sm DAEWOO_DG K51X 051229 indd 27 2005 12 30 11 47 42 ...
Страница 29: ...PCB CIRCUIT BOARD 28 CONTROL BOARD DG K518 Sm DAEWOO_DG K51X 051229 indd 28 2005 12 30 11 47 42 ...
Страница 31: ...PCB CIRCUIT BOARD 30 MICROPHONE BOARD DG K515 Sm DAEWOO_DG K51X 051229 indd 30 2005 12 30 11 47 43 ...
Страница 32: ...PCB CIRCUIT BOARD 31 5 YUV OUTPUT BOARD Sm DAEWOO_DG K51X 051229 indd 31 2005 12 30 11 47 44 ...
Страница 35: ...WAVEFORMS 34 U6 Pin38 SDRAM CLOCK CN4 Pin4 VSC S CLK Sm DAEWOO_DG K51X 051229 indd 34 2005 12 30 11 47 46 ...
Страница 36: ...WAVEFORMS 35 CN4 Pin6 VSD SDATA IN CN4 Pin5 VST S CS Sm DAEWOO_DG K51X 051229 indd 35 2005 12 30 11 47 47 ...
Страница 37: ...WAVEFORMS 36 CN4 Pin 2 IR Y1 Pin1 27MHz X TAL Sm DAEWOO_DG K51X 051229 indd 36 2005 12 30 11 47 48 ...
