JVC AV-48P776/H, Руководство по обслуживанию, Страница: 7 / 154

1-6 (No.YA318)
2.4 TECHNICAL INFORMATION
2.4.1 MAIN MICRO COMPUTER (CPU) FUNCTION
Pin
No. Pin name I/O Function Pin
No. Pin name I/O Function
1 ATSC_RX O Serial communication for ATSC tuner 43 CLKSW O Not used
2 /MICON_V I V. sync for OSD 44 ON_TIM O Brightness control for Power/OnTimer LED [Power ON & LOW: H]
3 LB_PRO I Low B protect detection [Protection: H] 45 CONVER_RXD O Serial communication for convergence control
4 NC - Not used 46 CONVER_TXD I Serial communication for convergence control
5 /RST I CPU reset [Reset: L] 47 SBT1 I Use for on board writing [Setting: H]
6 HDMI_IR I Interrupt request for HDMI [Empty: H] 48 NC - Not used
7 /TEST I Operation test for CPU [+3.3V Fixed] 49 ATSC_RST O Reset for ATSC tuner [Reset: H]
8 OSD_YS O Ys (blanking) for OSD 50 NC - Not used
9 SDA4 I/O I
2
C bus (data) for IC3001 51 OCP I Over current protect detection [Protection: H]
10 SYNC_SEL O Sync select for DIST process 52 ROTATION_L O Rotation control (left)
11 A_MU O Audio muting [Muting: H] 53 ROTATION_R O Rotation control (right)
12 /MICON_H I H. sync for OSD 54 DC_COTL O Black level DC reproduce control
13 BBE_SW O BBE control [ON: H] 55 HDMI_HP O HDMI control [HDCP Error: L]
14 OSDXI - Oscillation for OSD 56 EDID_WP O EDID data writing protect [Data writing: L]
15 OSDXO - Oscillation for OSD 57 LIGHT_DET O Photo sensor for DIGITAL-IN illegal copy protection
16 SDA2 I/O I
2
C bus (data) for MTS decode 58 /LOB_POW O Low-B power control [Power on: L]
17 AC IN I AC for timer clock 59 COMPLINK I/O Not used
18 SCL2 O I
2
C bus (clock) for MTS decode 60 /POWERGOOD I Not used
19 M_US_MU O Audio output muting [Muting: L] 61 MECA_SW I Machine SW interrupt detection [SW Pushing: L]
20 VCOI I LPF 62 /MAIN_POW O Main power control [Power on: L]
21 PDO O LPF 63 NC - Not used
22 /IP_RESET O Reset for DIST [Reset: L] 64 /B1 POW O B1 power control [Power on: L]
23 OSD_YM O YM (transparence) for OSD 65 C/N AFC1 I Main AFT voltage for tuner
24 OSD_B O Blue for OSD 66 X-RAY_M I X-ray protect detection [Protection: under 2.2V]
25 POW_LED O Lighting for Power/OnTimer LED [Power ON & HIGH: H] 67 SPRT I/O Not used : Sprit protect detection [Error: L]
26 OSD_G O Green for OSD 68 KEY2 I Front key scan voltage (CH+ / VOL+ / VOL-)
27 OSD_R O Red for OSD 69 KEY1 I Front key scan voltage (CH- / MENU / SUPER FOCUS)
28 VREF I Reference voltage for OSD 70 SCL1 O I
2
C bus (clock) for EEP-ROM (IC1803)
29 IP_ERR I AMDP program load error detection [Error: L] 71 SDA1 I/O I
2
C bus (data) for EEP-ROM (IC1803)
30 IREF I Reference current for OSD 72 REMO I Remote control
31 COMP I Phase adjust for OSD 73 POW_DET O Power detection for ATSC tuner
32 AVDD I +3.3V 74 VSS - GND
33 CLL I Clamp low level for SUB CCD 75 OSC2 O 4MHz oscillation for system clock
34 VREFLS I Reference voltage for SUB CCD 76 OSC1 I 4MHz oscillation for system clock
35 SUB_CCD I Composite video for SUB CCD 77 VDD I +3.3V
36 NC - Not used 78 SCL0 O I
2
C bus (clock) for general
37 VSS - GND 79 VOUTENB O Boost for tuner
38 MAIN_CCD I Composite video for MAIN CCD 80 SDA0 I/O I
2
C bus (data) for general
39 VREFHS I Reference voltage for MAIN CCD 81 NC - Not used
40 CLH I Clamp high level for MAIN CCD 82 ATSC_TX I Serial communication for ATSC tuner
41 VDD I +3.3V 83 NC - Not used
42 SCL4 O I
2
C bus (clock) for IC3001 84 P_MU O Picture muting [Muting: H]