JVC AV-28T5BK, Service Manual

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1-6 (No.YA261)
2.4 TECHNINAL INFORMATION
2.4.1 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 Scan velocity modulation
2 VssC4 -- GND 66 FbiSo I H pulse (Flyback pulse)
3 V1.8C4 I 1.8V 67 Hout O H drive
4 V3.3A3 I 3.3V 68 VssComb -- GND
5 VrefP_Sdac I 3.3V 69 V5Comb I 5V for comb filter
6 VrefN_Sdac -- GND 70 Vin/R2/Pr I EXT-1 R-Y
7 VrefP_Sdac I 3.3V 71 Uin/B2/Pb I EXT-1 B-Y
8 VrefN_Sdac -- GND 72 Yin/G2/Y I EXT-1 Y
9 VrefP_Sdac I 3.3V 73 Ysync I Y for SyncSep
10 XtalIn I System clock(4MHz) 74 Yout O Y(for 73pin)
11 XtalOut O System clock(4MHz) 75 Uout/INSSW2 I Ys(for EXT-1 Y/R-Y/B-Y insertion)
12 VssA1 -- GND 76 Vout/Swo1 -- Not used
13 Vguard I CRT NECK protection 77 INSSW3 I Ys(for EXT-2 Y/R-Y/B-Y insertion)
14 DecDig -- 1.8V 78 R3/Pr I EXT-2 R-Y
15 V5P1 I 5V 79 G3/Y I EXT-2 Y
16 Phi2 -- Not used 80 B3/Pb I EXT-2 B-Y
17 Phi1 -- Not used 81 Gnd3 -- GND
18 Gnd1 -- GND 82 V5P3 I 5V
19 SecPll -- Not used 83 BCL I Auto Beam / contrast
20 Dec8G -- Not used 84 BLKIN I Black current input (For Auto white balance)
21 Ewd/Avl O Parabola wave 85 Rout O Red (for CRT)
22 Vdb O V. Drive(-) 86 Gout O Green (for CRT)
23 Vda O V. Drive(+)(For side pin) 87 Bout O Blue (for CRT)
24 Vif1 I IF 88 V3.3A1 I 3.3V
25 Vif2 I IF 89 RefAdN -- Not used
26 Vsc -- Not used 90 V3.3RefAdP I 3.3V
27 Iref -- Not used 91 RefAd -- Not used
28 GndIF -- GND 92 GndA -- GND
29 Sif1 I SIF 93 V1.8A I 1.8V
30 Sif2 I SIF 94 V3.3A2 I 3.3V
31 Agc O AGC 95 VssAD -- GND
32 EHT I HV change control 96 V1.8ADC I 1.8V
33 Ssif/RefIn/Avl/RefOut O L'/Other SW [L':H] 97 REMOCON I Remote control
34 AudoIn5L I Not used 98 P10/Int1 I AV_LINK control
35 AudioIn5R I Not used 99 P11/TO O AV_LINK control
36 AudOutSL O Audio (Left) 100 V1.8C2 I 1.8V
37 AudOutSR O Audio (Right) 101 VssC2 -- GND
38 DecsDem -- Not used 102 P04/I2SWs -- Not used
39 QssO/AmO/AudeEm -- Not used 103 P03/I2SClk -- Not used
40 Gnd2 -- GND 104 P02/I2SDo2 -- Not used
41 PllIf -- Not used 105 P01/I2SDo1 -- Not used
42 SifAgc -- Not used 106 HP_DET I Head phone connection detection [Connect : L]
43 IfVo/FmRo/DvbO O Composite video detect 107 P13/T1 O Main power control [ON : H]
44 FmRo/DvbO -- Not used 108 SCL1 O I2C bus (clock) for AV SW, TUNER, VOLUME
45 V8AudioSwitches I 8V 109 SDA1 I/O I2C bus (data) for AV SW, TUNER, VOLUME
46 AgcSsif -- Not used 110 V3.3P I 3.3V
47 V5P2 I 5V 111 P20/TPwm O ROTATION
48 SVO/IfVo/Cvbsl -- Not used 112 P21/Pwm0 O S-CORRECTION CONTROL(PANORAMIC)
49 Audio4InL -- Not used 113 P22/Pwm1 O Audio muting [Muting : L]
50 Audio4InR -- Not used 114 P23/Pwm2 -- Not used
51 Y4/Cvbs4 I Composite video /Y 115 Protect I Protection detection for Low B short [Detect : H]
52 C4 I Chroma 116 P31/Adc1 O Lighting for POWER LED [ON : Soft RED]
53 Audio2InL -- Not used 117 V1.8C1 I 1.8V
54 Audio2InR -- Not used 118 DecV1V8 I 1.8V
55 Cvbs2/Y -- Not used 119 Key I Key scan front control
56 Audio3InL -- Not used 120 AGC I AGC
57 Audio3InR -- Not used 121 VssC1+P1 -- GND
58 Y3/Cvbs -- Not used 122 P24/PW3 -- Not used
59 C3 -- Not used 123 P25/PWM4 -- Not used
60 AudOutLsL -- Not used 124 V1.8C3 I 1.8V
61 AudOutLsR -- Not used 125 VssC3 -- GND
62 AudOutHpL -- Not used 126 Power DET I Main power detection [ON:H]
63 AudOutHpR -- Not used 127 P14/RX I/O I2C bus (data) for generally
64 CVBSO/PIP -- Not used 128 P15/TX O I2C bus (clock) for generally