JVC AV-29ST16, Service Manual

Page: 5 / 80

(No.YA469)1-5
2.2 TECHNINAL INFORMATION
2.2.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin
No.
Pin name I/O Function
Pin
No.
Pin name I/O Function
1 VssP2 - GND 65 SVM O Not used
2 VssC4 - GND 66 FbiSo I Flyback input/sandcastle output
3 V1.8C4 I 1.8V (Digital) 67 Hout O Horizontal output
4 V3.3A3 I 3.3V 68 VssComb - GND
5 VrefP_Sdac I 3.3V (Positive) 69 V5Comb I 5V
6 VrefN_Sdac - GND 70 Vin/R2/Pr I PIP R input
7 VrefP_Sdac I 3.3V (Negative) 71 Uin/B2/Pb I PIP B input
8 VrefN_Sdac - GND 72 Yin/G2/Y I PIP G input
9 VrefP_Sdac I 3.3V (Positive) 73 Ysync I Not used
10 XtalIn I 24.576MHz for system clock 74 Yout O Not used
11 XtalOut O 24.576MHz for system clock 75 Uout/INSSW2 I YUV insertion input
12 VssA1 - GND 76 NC O Not used
13 NECK I V-guard input/ I/O switch 77 INSSW3 I YUV insertion input
14 CONT I 1.8V regulator control 78 R3/Pr I Component PR input (Video-2)
15 V5P1 I +5V 79 G3/Y I Component Y input (Video-2)
16 Ph2 - Phase-2 filter 80 B3/Pb I Component PB input (Video-2)
17 Ph1 - Phase-1 filter 81 Gnd3 - GND
18 Gnd1 - GND 82 V5P3 I 5V
19 SecPll - SECAM PLL decoupling 83 BCL I Beam current limiter input
20 Dec8G - Bandgap decoupling 84 BLKIN I Black current input
21 EW O East-West drive output 85 Rout O R output
22 VDRB- O Vertical drive B output 86 Gout O G output
23 VDRA+ O Vertical drive A output 87 Bout O B output
24 Vif1 I Video IF input 1 88 V3.3A1 I 3.3V
25 Vif2 I Video IF input 2 89 RefAdN - GND
26 Vsc - Vertical sawtooth capacitor 90 V3.3RefAdP I 3.3V (Positive)
27 Iref I Reference current input 91 RefAd I 3.3/2V
28 GndIF - GND 92 GndA - GND
29 Sif1 I Sound IF input 1 93 V1.8A I 1.8V
30 Sif2 I Sound IF input 2 94 V3.3A2 I 3.3V
31 AGC O Tuner AGC output 95 VssADC - GND
32 EHT I EHT/overvoltage protection input 96 V1.8ADC I 1.8V
33 Ssif/RefIn/Avl/
RefOut
O Automatic Volume Levelling/ sound IF input / subcar-
rier reference output / external reference signal input
for I signalmixer for DVB operation
97 REMOTE I Remote control
34 L3 I Audio-L3 input (left signal) 98 PW_LED I POWER LED control
35 R3 I Audio-R3 input (right signal) 99 PW_LED I POWER LED control
36 L-OUT O Audio L output 100 V1.8C2 I 1.8V
37 R-OUT O Audio R output 101 VssC2 - GND
38 DecsDem - Decoupling sound demodulator 102 TIMER - Not used
39 QssO/AmO/
AudeEm
O QSS intercarrier output / AM output / deemphasis /
(front-end audio out)
103 TIMER - Not used
40 Gnd2 - GND 104 VER_PROTECT O X-ray protect
41 PllIf - IF-PLL loop filter 105 S_REDUCE O Sound control
42 SifAgc - AGC sound IF 106 P00/I2SDI1 O Not used
43 IfVo/FmRo/DvbO O Not used 107 POWER O SUB POWER control
44 NC O Not used 108 SCL1 I I2C bus clock
45 V8AudioSwitches I 8V 109 SDA1 I/O I2C bus data
46 AgcSsif - AGC capacitor second sound IF 110 V3.3P I 3.3V
47 V5P2 I 5V 111 ROTATION O Rotation
48 V-OUT O Video output 112 3.58/OTHER O NTSC 3.58 detection
49 L1 I Audio-L1 input 113 A_MUTE O Audio muting
50 R1 I Audio-R1 input 114 4.5/OTHER O NTSC 4.43 detection
51 V3 I Video V3 input 115 PROT I Protect
52 C4 I Not used 116 ECO_IN I ECO sensor level detection
53 Audio2InL I Not used 117 V1.8C1 I 1.8V (Digital)
54 Audio2InR I Not used 118 DecV1V8 I 1.8V
55 V2/Y I Video V2 input 119 KEY_IN I Key scan data
56 L2 I Audio L2 input (Left signal) 120 VDO-DET I Video DET input
57 R2 I Audio R2 input (right signal) 121 VSSC1+P1 - Digital GND
58 Y3/Cvbs I S-Video Y1 input 122 S_V_DET I S-Video DET input
59 C1 I S-Video C1 input 123 P25/PWM4 O GTVA_reset
60 AudioLsL O Audio L output for audio power amplifier 124 V1.8C3 I 1.8V (Digital)
61 AudioLsR O Audio R output for audio power amplifier 125 VssC3 - GND
62 HP-L O Not used 126 P12/Int2 I External interrupt
63 HP-R O Not used 127 SDA0 I/O I2C bus data (for memory)
64 CVBSO/PIP O CVBS / PIP output 128 SCL0 I I2C bus clock (for memory)