Daewoo DSD-9251MA, Service Manual

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9
CIRCUIT OPERATING MANUAL
Chart 1. Remote controller Key Code
Key Function Hex Key Function Hex
Custom code 0x16 0x1C
Power 0x15 INF0 0x21
Mute 0x12 PR 0x17
1 0x01 PR 0x18
2 0x02 0x14
3 0x03 0x13
4 0x04 OK 0x11
5 0x05 EXIT 0x23
6 0x06 0x1D
7 0x07 EPG 0x24
8 0x08 PAUSE 0x1E
9 0x09 Audio-L/R 0x0D
0 0x00 ALT-AUDIO 0x0E
TV/RADIO 0x0A TXT 0x25
PR 0x20 UHF 0x26
MENU 0x22
(3) Display Interface
The signal that controls the Segment of 7-Segment is used with the signal of Key Scan as mentioned above in Key
Interface section.
Common signals that control Digit use PIO (PIO3-0,1,2,3 and 4)
Following picture shows the structure of operation. Display use Common Cathode Type. Display is activated by
recurrent signals with cycle of 1~3ms.
3V3
E
Q1
B57
C
B
R1
2.2K
COM0
2
1
C
D1
DX8
R2
33
Q2
B47
B
E
GND
R3
2.2K
SEG_A