JVC AV-21MT16/Z Service Manual page 5

2.3 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION
Pin
Pin name I/O
No.
1 VssP2 -
2 VssC4 -
3 V1.8C4 I
4 V3.3A3 I
5 VrefP_Sdac I
6 VrefN_Sdac -
7 VrefP_Sdac I
8 VrefN_Sdac -
9 VrefP_Sdac I
10 XtalIn I
11 XtalOut O 24.576MHz for system clock
12 VssA1 -
13 NECK I
14 CONT I
15 V5P1 I
16 Ph2 -
17 Ph1 -
18 Gnd1 -
19 SecPll -
20 Dec8G -
21 EW O East-West drive output
22 VDRB- O Vertical drive B output
23 VDRA+ O Vertical drive A output
24 Vif1 I
25 Vif2 I
26 Vsc -
27 Iref I
28 GndIF -
29 Sif1 I
30 Sif2 I
31 AGC O Tuner AGC output
32 EHT I
33 Ssif/RefIn/Avl/RefOut O Automatic Volume Levelling/ sound IF input /
34 L3 I
35 R3 I
36 L-OUT O Audio L output
37 R-OUT O Audio R output
38 DecsDem -
39 QssO/AmO/AudeEm O QSS intercarrier output / AM output /
40 Gnd2 -
41 PllIf -
42 SifAgc -
43 IfVo/FmRo/DvbO O Not used
44 NC O Not used
45 V8AudioSwitches I
46 AgcSsif -
47 V5P2 I
48 V-OUT O Video output
49 L1 I
50 R1 I
51 V3 I
52 C4 I
53 Audio2InL I
54 Audio2InR I
55 V2/Y I
56 L2 I
57 R2 I
58 Y3/Cvbs I
59 C1 I
60 AudioLsL O Audio L output for audio power amplifier
61 AudioLsR O Audio R output for audio power amplifier
62 HP-L O Not used
Function
GND
GND
1.8V (Digital)
3.3V
3.3V (Positive)
GND
3.3V (Negative)
GND
3.3V (Positive)
24.576MHz for system clock
GND
V-guard input/ I/O switch
1.8V regulator control
+5V
Phase-2 filter
Phase-1 filter
GND
SECAM PLL decoupling
Bandgap decoupling
Video IF input 1
Video IF input 2
Vertical sawtooth capacitor
Reference current input
GND
Sound IF input 1
Sound IF input 2
EHT/overvoltage protection input
subcarrier reference output / external reference
signal input for I signalmixer for DVB operation
Audio-L3 input (left signal)
Audio-R3 input (right signal)
Decoupling sound demodulator
deemphasis / (front-end audio out)
GND
IF-PLL loop filter
AGC sound IF
8V
AGC capacitor second sound IF
5V
Audio-L1 input
Audio-R1 input
Video V3 input
Not used
Not used
Not used
Video V2 input
Audio L2 input (Left signal)
Audio R2 input (right signal)
S-Video Y1 input
S-Video C1 input
Pin
Pin name I/O
No.
63 HP-R O Not used
64 CVBSO/PIP O CVBS / PIP output
65 SVM O Not used
66 FbiSo I
67 Hout O Horizontal output
68 VssComb -
69 V5Comb I
70 Vin/R2/Pr I
71 Uin/B2/Pb I
72 Yin/G2/Y I
73 Ysync I
74 Yout O Not used
75 Uout/INSSW2 I
76 NC O Not used
77 INSSW3 I
78 R3/Pr I
79 G3/Y I
80 B3/Pb I
81 Gnd3 -
82 V5P3 I
83 BCL I
84 BLKIN I
85 Rout O R output
86 Gout O G output
87 Bout O B output
88 V3.3A1 I
89 RefAdN -
90 V3.3RefAdP I
91 RefAd I
92 GndA -
93 V1.8A I
94 V3.3A2 I
95 VssADC -
96 V1.8ADC I
97 REMOTE I
98 PW_LED I
99 PW_LED I
100 V1.8C2 I
101 VssC2 -
102 TIMER -
103 TIMER -
104 VER_PROTECT O X-ray protect
105 S_REDUCE O Sound control
106 P00/I2SDI1 O Not used
107 POWER O SUB POWER control
108 SCL1 I
109 SDA1 I/O I2C bus data
110 V3.3P I
111 ROTATION O Rotation
112 3.58/OTHER O NTSC 3.58 detection
113 A_MUTE O Audio muting
114 4.5/OTHER O NTSC 4.43 detection
115 PROT I
116 ECO_IN I
117 V1.8C1 I
118 DecV1V8 I
119 KEY_IN I
120 VDO-DET I
121 VSSC1+P1 -
122 S_V_DET I
123 P25/PWM4 O GTVA_reset
124 V1.8C3 I
125 VssC3 -
126 P12/Int2 I
127 SDA0 I/O I2C bus data (for memory)
128 SCL0 I
Function
Flyback input/sandcastle output
GND
5V
PIP R input
PIP B input
PIP G input
Not used
YUV insertion input
YUV insertion input
Component PR input (Video-2)
Component Y input (Video-2)
Component PB input (Video-2)
GND
5V
Beam current limiter input
Black current input
3.3V
GND
3.3V (Positive)
3.3/2V
GND
1.8V
3.3V
GND
1.8V
Remote control
POWER LED control
POWER LED control
1.8V
GND
Not used
Not used
I2C bus clock
3.3V
Protect
ECO sensor level detection
1.8V (Digital)
1.8V
Key scan data
Video DET input
Digital GND
S-Video DET input
1.8V (Digital)
GND
External interrupt
I2C bus clock (for memory)
(No.YA405)1-5