1-9-1
BLOCK DIAGRAMS
System Control Block Diagram
E68C4BLS
IC601
(MAIN MICR
O CONTR
OLLER)
IC1207
(SUB MICR
O CONTR
OLLER)
REMO
TE
SENSOR
RM1201
1G
7G
~
23
17
~
a
h
i
~
7
14
~
GRID
RESET
EV+3.3V
VFD
SEGMENT
FL1203
IC1205
IC1206
A
V CB
A
D
VD MAIN CB
A
(VFD DRIVER)
KEY SWITCH
KEY SWITCH
CN1205
CN3001
KEY
-1
1
1
KEY
-2
2
2
SW CB
A
16
28
1
2
48
50
49
27
1
2
52
38
33
34
22
19
18
20
29
V7
A2
Y2
H2
U8
8
9
41
12
14
30
7
1
2
11
27MHz
X'T
AL
X802
CLK 27 IN
CLK 27 OUT
SYS-RESET
SUB-RXD
SUB-TXD
SUB-SCLK
RD
Y
CN601
SYS-RESET
SUB-RXD
SUB-TXD
SUB-SCLK
RD
Y
CN1204
REG-CONT
VIDEO-SW1
A
UDIO-MUTE
SUB-SD
A
SUB-SCL
RGB THR
OUGH
RGB THR
OUGH
OSC2
OSC1
X OUT
X IN
RESET
P-DO
WN
VCC
FL-DIN
FL-CLK
FL-STB
REMO
TE
KEY
-1
KEY
-2
REG-CONT
PWSW
VIDEO-SW1
SD
A
SCL
A
UDIO-MUTE
T
O PO
WER SUPPL
Y
BLOCK DIA
GRAM
T
O VIDEO
INPUT/OUTPUT
SELECT BLOCK DIA
GRAM
T
O A
UDIO
BLOCK DIA
GRAM
8MHz
RESONA
T
OR
X1202
32.768KHz
X'T
AL
X1201
Q1222
Q1224
C1231
(BA
CKUP CAP
A
CIT
OR)
DIN
CLK
STB
1
FAN+12V
2
GND
CN1202
FAN
N1
SCL
SDA
TU1201(TUNER UNIT)
11
12
EV+5V
42
VIDEO-SW2
VIDEO-SW2
43
VIDEO-SW3
VIDEO-SW3
Q1205,Q1206
F
AN-AL+12V
55
F
AN-CONT2
F
AN CONTR
OL
IC1215
M1
30
30
SYS-RESET
29
29
SUB-RXD
27
27
SUB-TXD
25
25
SUB-SCLK
28
28
RD
Y
IC1501
CN601
CN1204
26
REG-CONT2
EV+2.4V
P-ON+1.5V
26
26
REG-CONT2
+1.5V
REGULA
T
OR
J908
J906
6
3
2
5
(5V<-->3.3V LEVEL CONVER
TER)
17
T
O A
UDIO
BLOCK DIA
GRAM
RGB THR
OUGH
T
O VIDEO
OUTPUT
SELECT BLOCK DIA
GRAM
D
A
VN-L
D
A
VN-L
24
T
O
VIDEO INPUT SELECT
BLOCK DIA
GRAM
SD
A
SCL
T
O
VIDEO INPUT SELECT
BLOCK DIA
GRAM
A,C
Comparison Char
t of
Models & Marks
Model
Mark
DR-A2677
DR-A2631
A
B
DR-B2737
C
www.freeservicemanuals.info
12/1/2013
www.nostatatech.nl
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