Velas VDM-MB434TV, Service Manual

Page: 20 / 33

SCHEMATIC DIAGRAM
CD SERVO BOARD 4/4 Section
19
5 5
4 4
3 3
2
1
D
D
C
C
B
B
A
YUV3
DVD_CS DVD_DAT_IN_IR
LOAD-
LOAD+
DVD_CLK DVD_DAT_IN_IR
USBM USBP
USB_DP USB_DM
DVD_DAT_OUT DVD_CS DVD_CLK DVD_DAT_IN_IR
89_AR
ROUT
89_AL
LOUT
ASPDIF
A_MUTE
USB_DP ROUT LOUT
HOMESW INSW
CLOSE
VIDEO_OUT
USB_DM
OPEN A_MUTE OUTSW
VIDEO_OUT
TRIN TROUT
LOAD- LOAD+
TRISIN
USBP USBM
YUV[1..6]
MUTE_DAC
DISK_IN
A-GND
LOAD12V
LOAD+5V
MGND
MGND
B+5V
DV33
B+5V
DV33
CLOSE
OPEN
OUTSW
TRIN TROUT
DVD_CLK
DVD_DAT_OUT
DVD_CS
IR_IN
HOMESW
VCC
ACC5V
INSW
LIMIT
TROPEN
3
TRCLOSE
3
TRISIN
USBP USBM
89_AL
89_AR
ASPDIF
YUV[1..6]
[4,6]
MUTE_DAC
DISK_IN
(Sledge
Limit)
R54 15K R54 15K
Q27 2N3906 Q27 2N3906
J3 TRAY HEAD6-80 J3 TRAY HEAD6-80
1 2 3 4 5 6
+
CE60
10uF
+
CE60
10uF
RR17
OPEN
RR17
OPEN
R277 0 R277 0
R50
0
R50
0
+
CE58
10uF
+
CE58
10uF
R284
180k
R284
180k
C184 47pF C184 47pF
R265 0 R265 0
R53 15K R53 15K
R270 180k R270 180k
P3
COAXIAL
P3
COAXIAL
1 2
R325 100k R325 100k
R324 4.7k R324 4.7k
RR2
10K
RR2
10K
R276
75
R276
75
RR1
10K
RR1
10K
S1
Disck
In
S1
Disck
In
RR10
OPEN
RR10
OPEN
C183 47pF C183 47pF
RR16
1K
RR16
1K
RR11
1K
RR11
1K
C194
0.1uF
C194
0.1uF
L76 FB L76 FB
RR3
33R
RR3
33R
RR14
33R
RR14
33R
C196
100pF
C196
100pF
R275
100
R275
100
C198 22p C198 22p
CN11
CON1
(25pin/1.0mm)
CN11
CON1
(25pin/1.0mm)
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
R278
110
R278
110
R326
10K
R326
10K
C99 0.1U C99 0.1U
+
B1 220U/6.3V
+
B1 220U/6.3V
C197
100pF
C197
100pF
D42
4.3V
D42
4.3V
RR12
1K
RR12
1K
R316
470
R316
470
L63 1.8uH L63 1.8uH
JP3 OPEN JP3 OPEN
RR13
33R
RR13
33R
R244
75R
R244
75R
R52
0
R52
0
U9 BA6289F
ROHM
U9 BA6289F
ROHM
OUT1
1
VM
2
VCC
3
FIN
4
RIN
5
VREF
6
OUT2
7
GND
8
RR15
33R
RR15
33R