JVC LT-26C31BJE Service Manual page 10
Lcd flat television
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Also See for LT-26C31BJE:
- Instructions manual (42 pages) ,
- Instructions manual (43 pages) ,
- Service manual (31 pages)
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2.2.3 SUB CPU PIN FUNCTION (IC7807)
Pin No.
1
(SYSTEM0)
2
(SYSTEM3)
3
AVCC
4
X2
5
X1
6
VCL
7
RES
8
TEST
9
VSS
10
OSC2
11
OSC1
12
VCC
13
NC
14
NC
15
BL_D2
16
BL_D1
17
I2C_STOP
18
BL_ON
19
NC
20
NC
21
NC
22
NC
23
SDA1
24
A.DIM
25
SCL1
26
SDA0
27
SCL0
28
NC
29
NC
30
NC
31
NC
32
NC
33
NC
34
NC
35
NMI
36
NC
37
(HD)
38
NC
39
(REMO)
40
NC
41
P85
42
P86
43
P87
44
SCK3
45
RXD
46
TXD
47
(PROTECTOR0)
48
NC
49
RXD2
50
TXD2
51
NC
52
(ACTIVE)
53
VD
54
(REC_DET)
55
(PSS)
56
(ALARM)
57
(SYSTEM2)
58
(SYSTEM1)
59
(PROTECTOR1)
60
(AMP_PRO2)
61
(AMP_PRO1)
62
EE_CDS
63
(KEY_IN1)
64
(KEY_IN2)
1-10 (No.YA014)
Pin name
I/O
I
I
-
-
-
-
-
O
-
O
O
O
O
O
O
O
O
O
O
I/O
O
O
I/O
O
O
O
O
O
O
O
O
O
O
O
-/I
-
-
O
O
O
O
O
I
GND
GND
5V
Sub clock
Sub clock
Internal down voltage
I
Reset [Reset : L]
I
Operation test for SUB CPU
GND
10MHz oscillation for system clock
I
10MHz oscillation for system clock
5V
Not used
Not used
Back light 20ms delay for LCD panel [On:L]
Back light 10ms delay for LCD panel [On:L]
Not used
Back light reset for LCD panel [Reset:L]
Not used
Not used
Not used
Not used
2
I
C bus data (For Sub memory)
Not used
2
I
C bus clock (For Sub memory)
2
I
C bus data (For general)
2
I
C bus clock (For general)
Not used
Not used
Not used
Not used
Not used
Not used
Not used
I
Port for writing on board [Writning:L]
Not used
I
Not used
Not used
I
Not used
Not used
Not used
Not used
Not used
Port for writing on board
I
Port for writing on board
Port for writing on board
I
Not used
Not used
I
Port for communication (Main CPU)
Port for communication (Main CPU)
Not used
I
Not used
Vertical sync
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
I
Not used
Function
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