SERVICE MANUAL
Document No
Date of Origin
Date of REV
51-L-DSR004
98-10-21
PAGE REV.
0
PAGE
90 /102
S-00-005(96.03.27)
REV.1
4.8
FRONT
SAMSUNG ELECTRO-MECHANICS CO., LTD
A
12
16
Friday, October 16, 1998
SEMCO-BSKYB
Title
Size Document Number
Rev
Date:
Sheet of
5VD
5VD
5VD
5VD
5VD
5VD
5VD
UP
DOWN
LEFT
RIGHT
PWR
INFO
GUIDE
ENTER
BACKUP
/MCU_RESET
SCL
SDA
MOD_IR_DATA
MOD_SDA
FMCU_INT
MOD_SCL
9V_ON/OFF
on;Green
off;Red
msg
Ir
blue
U500
ST72251
RESET
1
XTALIN
2
XTALOUT
3
PB-7
4
PB-6
5
PB-5
6
PB-4
7
PB-3
8
PB-2
9
PB-1
10
PB-0
11
PC-5
12
PC-4
13
PC-3
14
PC-2
15
PC-1
16
PC-0
17
PA-7
18
PA-6/SDA
19
PA-5
20
PA-4/SCL
21
PA-3
22
PA-2
23
PA-1
24
PA-0
25
TEST
26
0VD
27
5VD
28
R500
10K
D500
RLS4148
C501
10U/m
+
C500
104
R506 150
R508
150
R509
150
R505
150
LD500
NC
LD502
YELLOW
LD503
RED
LD504
GREEN
X500
8MHz
R502
10M
R507
0
R501
47
C502
104
C505
104
C506
104
R510
3K
R516
3K
R514
1K
R521
1K
R520
1K
R519
1K
R518
1K
TP500
R522
1K
R503
NC
R515
1K
LD501
LED2
Q500
KST2907A
R523
100
R511
1K
R512
1K
S503
TSW
S504
TSW
S510
TSW
S505
TSW
S509
TSW
S508
TSW
S506
NC
S507
TSW
C504
18P
C503
18P
R513
1K
J501
W10
1
2
3
4
5
6
7
8
9
10
C507
47U/m
+
S501
TSW
S502
TSW
IR500
TSOP1236
DATA
3
GND
1
VCC
2
TP502
R525
2.7K
R526
2.7K
Q501
KST2222AL
R529
1K
R504
150
R524
2.7K
R527 NC
C508
4.7U/m
+
L1
10uH
R528
12K