JVC LT-42R90BU Service Manual

1-8 (No.YA596<Rev.001>)
2.3.2 MAIN CPU PIN FUNCTION [IC7001
: MAIN PWB]
Pin Pin name I/O Function
1 KEY1 I
Key scan for side control (POWER/VOL/UP/DOWN)
2 ECO SENSER I Eco sensor detection
3 VDD33_GPIO - 3.3V power supply
4 SLOW1 I EXT-1 SLOW detection
5 SLOW2 I EXT-2 SLOW detection
6 AFC1 I AFT voltage for VHF/UHF tuner
7 AGC I RF AGC voltage for VHF/UHF tuner
8GND -GND
9 VDD33_CADC - 3.3V power supply
10 MONITOR_OUT O Video for EXT-2
11 VDD33_AFE - 3.3V power supply
12 VOUT2 O Not used
13
VDD12_ADC_1234 - 1.25V power supply
14 VOUT3 O Not used
15 GND - GND
16 TV_CV I Video for VHF/UHF tuner
17 GND - GND
18 E1_CV I Video for EXT-1
19
VDD12_ADC_1234 - 1.25V power supply
20 E2_CV/Y I Video/Y for EXT-2
21 GND - GND
22 AGND1234 I LPF setting
23 VDD33_AFE - 3.3V power supply
24 IDTV_CV I Not used
25
VDD12_ADC_1234 - 1.25V power supply
26 IDTV_CR I Not used
27 GND - GND
28 IDTV_Y I Not used
29 GND - GND
30 SC_FB1 I Ys for EXT-1
31
VDD12_ADC_1234 - 1.25V power supply
32 IDTV_CB I Not used
33 GND - GND
34 SC_R1 I R for EXT-1
35 VDD33_AREF - 3.3V power supply
36 SC_G1 I G for EXT-1
37
VDD12_ADC_5678 - 1.25V power supply
38 SC_B1 I B for EXT-1
39 GND - GND
40 AGND5678 I LPF setting
41 GND - GND
42 E2_C I C for EXT-2
43
VDD12_ADC_5678 - 1.25V power supply
44 VIN16 I Not used
45 GND - GND
46 VIN17 I Not used
47 VDD33_AREF - 3.3V power supply
48 VIN18 I Not used
49
VDD12_ADC_5678 - 1.25V power supply
50 E3_PR I Pr for EXT-3
51 GND - GND
52 E3_Y I Y for EXT-3
53 GND - GND
54 E3_PB I Pb for EXT-3
55
VDD12_ADC_5678 - 1.25V power supply
56 VIN22 I Not used
57 GND - GND
58 VDD_CORE - 1V power supply
59 GND - GND
60 SIF_INM I SIF for VHF/UHF tuner
61 TU_SIF I SIF for VHF/UHF tuner
62 VDD12_SIFADC - 1.25V power supply
63 LINE_OUT1R O Audio for EXT-1
64 LINE_OUT1L O Audio for EXT-1
65 TU_R O Audio for EXT-2 or Audio out
66 TU_L O Audio for EXT-2 or Audio out
67 R_AUSW I Audio
68 L_AUSW I Audio
69 VDD33_AAU - 3.3V power supply
70 LINE_IN3R I Not used
71 LINE_IN3L I Not used
72 GND - GND
73 LINE_IN2R I Not used
74 LINE_IN2L I Not used
75 GND - GND
76 LINE_IN1R I Not used
77 LINE_IN1L I Not used
78 VREFAU I Reference voltage setting
79 HP_R O Audio for headphone
80 HP_L O Audio for headphone
81 MAIN_OUT_SUB O Not used
82 M_R O Audio for speaker
83 M_L O Audio for speaker
84 GND - GND
85
VDD10_HDMI1+2 - 1V power supply
86 HMDI1_RXCN I TMDS clock for HDMI
87 HMDI1_RXCP I TMDS clock for HDMI
88 GND - GND
89
VDD33_HDMI1+2 - 3.3V power supply
90 HDMI1_RX0N I TMDS data for HDMI
91 HDMI1_RX0P I TMDS data for HDMI
92 GND - GND
93
VDD10_HDMI1+2 - 1V power supply
94 HDMI1_RX1N I TMDS data for HDMI
95 HDMI1_RX1P I TMDS data for HDMI
96 GND - GND
97
VDD33_HDMI1+2 - 3.3V power supply
98 HDMI1_RX2N I TMDS data for HDMI
99 HDMI1_RX2P I TMDS data for HDMI
100 GND - GND
101
VDD10_HDMI1+2 - 1V power supply
102 VDD_CORE - 1V power supply
103 GND - GND
104
VDD10_HDMI1+2 - 1V power supply
105 HMDI2_RXCN I Not used
106 HMDI2_RXCP I Not used
107 GND - GND
108
VDD33_HDMI1+2 - 3.3V power supply
109 HDMI2_RX0N I Not used
110 HDMI2_RX0P I Not used
111 GND - GND
112
VDD10_HDMI1+2 - 1V power supply
113 HDMI2_RX1N I Not used
114 HDMI2_RX1P I Not used
115 GND - GND
116
VDD33_HDMI1+2 - 3.3V power supply
117 HDMI2_RX2N I Not used
118 HDMI2_RX2P I Not used
119 GND - GND
120
VDD10_HDMI1+2 - 1V power supply
121 VDD25_DRAM - 2.5V power supply
122 DRAM_VREF I Reference voltage setting
123 VDD25_DRAM - 2.5V power supply
124 VDD25_DRAM - 2.5V power supply
125 VDD25_DRAM - 2.5V power supply
126 RX_DTV O Not used
127 DIN_HOTP1 O
Hotplug error detection for HDMI connector-1 [Error = L]
128 AUDIO_MUTE O Speaker/headphone output muting [Muting = H]
129 VDD33_GPIO - 3.3V power supply
130 LB_PRO I
Power abnormality detection [Emergent = H]
131 P3.2 I L fixed
132 HM_SDA I/O Data for I2C bus (for HDMI)
133 HM_SCL O Clock for I2C bus (for HDMI)
134 HM_HPLUG2 O
Hotplug error detection for HDMI connector-2 [Error = L]
135 HM_HPLUG3 O Hotplug error detection for HDMI connector-3 [Error = L]
136 STATUS I Not used
137 ID_RESET O Not used
138 IRQ O Not used
Pin Pin name I/O Function

JVC LT-42R90BU Specifications

General

Brand	JVC
Model	LT-42R90BU
Category	LCD TV
Language	English