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Decoder Board -- Circuit Diagram
R502
C502
27K
100pF
CE501
R501
R503
AL
10K
5.1K
10uF/16V
C501
1000pF
R505
10K/NC
R531
R506
MIC
0/NC
10K/NC
R508
C504
27K
100pF
CE502
R507
R509
AR
10K
5.1K
10uF/16V
C503
1000pF
L501
V_R
1.8uH
R522
C506
C507
75/1%
100 pF
100 pF
L502
V_G
1.8uH
R523
C508
C509
75/1%
100 pF
100 pF
L503
V_B
1.8uH
R524
C510
C511
75/1%
100 pF
100 pF
8-5
-12VA
U501A
2
4558
R504
1
3
100
Q501
2N3904
+12VA
U501B
6
4558
R510
7
5
100
Q502
2N3904
R/V
CVBS_OUT
R525
C512
D504
75/1%
100 pF
BAV99
+5VA
R526
ASP DIF
G/Y
0
R527
D505
OPTICAL
BAV99
33
R528
100
C515 0.1uF
+5VA
R529
C514
100
330 pF
B/U
D506
BAV99
+5VA
V33
# mute:
H
unmute: L
R512
10K/NC
R511
LCH
MUTE
470
C505
A_MUTE
3300 pF
MUTE_Circuit
+5VA
D502
1N4148
R521
D501
100K
1N4148
R520
RCH
Q505
2N3906
5.1K
CE503
A_MUTE
220 uF/16V
LCH
LSCH
RCH
RSCH
L504
CVBS
1.8uH
C513
D507
100 pF
BAV99
C518
NC
C519
NC
+5VA
C520
NC
C521
NC
AV501
9
8
7
C522
NC
C523
2
NC
B/U
6
4
R/V
3
1
5
SVIDEO+COAX
8-5
V33
R514
10K
R513
R515
10K
Q504
2N3906
470
Q503
2N3904
R516
100
R517
A_MUTE
-12VA
100K
R519
R518
82
560
CE504
220 uF/16V
D503
1N4148
AV502
3
R534 0
1
R535 0/NC
R536 0
2
R537 0/NC
LCH
6
LCH
4
RCH
RCH
5
G/Y
9
7
R530
CVBS
8
100
B/U
12
10
R/V
11
RCA8 (RGB/YUV+CVBS+2CH)
AL
AL
AR
AR
ASP DIF
ASP DIF
MUTE
MUTE
LSCH
LSCH
RSCH
RSCH
LCH
LCH
RCH
RCH
OPTICAL
OPTICAL
A_MUTE
A_MUTE
AKIN1
AKIN1
AUDIO I/F
V_R
V_R
V_G
V_G
V_B
V_B
CVBS_OUT
CVBS_OUT
R/V
R/V
G/Y
G/Y
B/U
B/U
CVBS
CVBS
VIDEO I/F
GPIO21
GPIO21
GPIO I/F
R532
NC
CON501
R533
2
1
NC
PH-2A
CON502
+12VA
1
-12VA
2
3
MIC
4
PH-4A
C516
150 pF
C517
AKIN1
474
AKIN1 signal:Vp-p<=700mV ;
R & C closed to MT1389 DE/L .
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