JVC AV-27FA44/ASA, Руководство по обслуживанию

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(No.52114)1-5
2.3 TECHNINAL INFORMATION
2.3.1 SYSTEM BLOCK DIAGRAM
2.3.2 MAIN MI-COM (CPU) PIN FUNCTION
S C L 1
S D A 1
A F T 1
SCL0 SDA0
S C L 0 S D A 0 S C L 0 S D A 0
MAIN MI-COM /
VIDEO PROCESS /
DEF. PROCESS
IC101
IF DET
TU001
TUNER
IC5501
S C L 0 S D A 0
IC5001
MTS
TONE/VOL
S C L 0 S D A 0
IC5201
3-LINE YC SEP.
S C L 0 S D A 0
IC502
D-A CONVERTER
LATCH&
AV SW
IC201
REMOCON
REMOCON
RECEIVER
IC702
MEMORY
Function
Pin
No.
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Pin name
YCD_GND
Vin1
ABCL
Monitor
Black_Det
SVM_out
APL_Fil
APC_Fil
3.58MHz
YC_Vcc_5V
R_out
G_out
B_out
RGB_Vcc_9V
IK in
TV_DGND
uP_MPAGND
uP_MPAVDD
MAIN_POWER
HAZARD
SDAO
SCLO
SDA1
AGC ADJUST
SCL1
LED
REMOCON
COMPULINK
GND
Not used
Current for automatic beam (brightness)/contrast limit
Not used
Black level detection filter
Y signal for scan velocity modulation
Average picture level filter
Automatc phase control filter
Color sub carrier (3.58MHz) for 3-line digital comb filter [IC5201]
5V (for video process circuit)
R signal
G signal
B signal
9V (for RGB process circuit)
Not used
GND
GND
5V
Power on/off switching control [Powen on : L]
B1 over cuurent / V. amplitude detection (for protect) [Defective : H]
Data for Inter IC control bus (for various devices)
Clock for Inter IC control bus (for various devices)
Data for Inter IC control bus (for main memory)
AGC adjustment (for tuner) <S45 in Service menu>
Clock for Inter IC control bus (for main memory)
POWER / ON TIMER LED lndication [lighting : L]
Remote control sensor input [No input : H]
AV COMPULINK lll control [No input : H]
Function
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin name
AFT2
AFT1
KEY
uP DVss
Reset
Xout
Xin
TEST
uP_DVDD
AGC_MUTE
UP_VVss
TV_HGND
FBP_SCP
Hout
H_Vcc_9V
HAFC_1
Vsaw
Vout
EW_out
Xray
Ys
Cb_input
Y_input
Cr_input
DVcc_3.3V
V3in/Cin
EHT_in
V2in/Y
Not used
AFT voltage for tuner (Tuning frequency control)
Key scan for front control [No signal : H]
GND
CPU reset
CPU system clock : 8MHz oscillation
CPU system clock : 8MHz oscillation
GND
5V
AGC muting for tuner (when channel select) [Muting : H]
GND
GND
Flyback pulse (H. pulse)
H. drive (oscillation)
9V (for H. oscillation start)
H. AFC filter
V. saw filter
V. drive
Parabola waveform (for sidepin correection)
X-ray detection (for protection) [Detection : H]
Not used
Cb (external) signal
Y (external) signal
Cr (external) signal
3.3V
Chroma signal (for YC separation output)
Not used
Y signal (for YC separation output)
I/O
I
I
I
-
I
O
I
-
-
O
-
-
I
O
-
-
-
O
O
I
I
I
I
I
-
I
I
I
I/O
-
I
I
O
-
O
-
-
O
-
O
O
O
-
I
-
-
-
O
I
I/O
O
I/O
O
O
O
I
I