1
2
3
4
5
6
7
A
B
C
D
E
F
G
7
6
5
4
3
2
1
G
F
E
D
C
B
A
Title: Digital AV Decoder
Approved by:
Drawn by:
File Name:
Path: M:\IanS\temp\temp.ddb - Documents\SC011D91.SCH
Print date:
Drawn date:
Issue:
Sheet of
2-Apr-2008
0
Huntingdon, United Kingdom.
This drawing is the intellectual property of Cyrus Electronics Ltd.
O
c
Description:
13
13
13
Sheet
Host Micro-controller Front Panel Display Interface
1-Apr-1999
Cummins/Sells
To Host Micro
RemoteControl
/FrontPanel RedLED
T1304
BC856BLT1
+5V
R1307
10k
R1308
10k
+5V
FrontPanel BackLight
T1301
BC856BLT1
R1303
3R3
0.116W
R1302
10k
/FrontPanel GreenLED
T1305
BC856BLT1
+5V
R1309
10k
R1310
10k
+5V
CON1301
25FE-BT-VK-N
+5V
KeyPadInput
C1308 10n
C1309 47u
6.3V
GND
C1306 10n
C1307 47u
6.3V
L1302
1.0u-FSL
C1305
10n
+5V
hc11D0
hc11D1
hc11D2
hc11D3
hc11D4
hc11D5
hc11D6
hc11D7
VC
C
20
GND
10
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
B7
11
B6
12
B5
13
B4
14
B3
15
B2
16
B1
17
B0
18
OE
19
T/R
1
IC1301
MC74HC245ADW
R1312 47R
hc11RnotW
R1311 47R
/Display E
C1303
47n
+5V
GND
L1301
1.0u-FSL
C1302
47n
GND
GND
GND
RotaryEncoder[1]
RotaryEncoder[0]
RP1303
CAT16-470J4
47R
RP1301
CAT16-470J4
47R
R1314
270R
GND
RP1302
CAT16-470J4
47R
GND
R1313
680R
R1317 47R
Display RnotW
R1316 47R
Display E
hc11A0
R1315 47R
T1302
TIP32
+ve lowVoltage
R1304
680R
T1303
BC846BLT1
R1305
10k
R1306
10k
GND
GND
C1301
DNF
Backlight On 180 mA
Backlight Off 0 mA
1
2
3
14
7
IC1302A
MC74HC32AD
hc11A15
Display A0
Display RnotW
hc11RnotW
Display A0
4
5
6
IC1302B
9
10
8
IC1302C
GND
12
13
11
IC1302D
+5Vaddr
C1304
47n
GND
FrontPanel BackLight Current
FrontPanel RedLED
FrontPanel GreenLED
FrontPanel BackLight Current
FrontPanel RedLED
FrontPanel GreenLED
R1301 1R
MF 1/4W
5%
WELWYN
FUSIBLE
/Display E