Service manual
18
LC-20C3U-S
No
. Pin name Function
1 V HOLD
2 HLF
3 MAIN SW
4 TIMELED
5 M/S OUT
6 CSYNC
7 IREM1
8 BYTE
9 CNVSS
10 XCIN
11 XOUT
12 RESET
13 XOUT
14 GND
15 XIN
16 VCC
17 OSCIN
18 OSCOUT
19 PSWIN
20 SUBREADY
21 BLK
22 N.C.
23 DAC1CS
24 DAC2CS
25 D SW
26 DTV
27 MRDY
28 SCL2
29 SCL1
30 SDA1
31 SDA2
32 R
33 G
34 B
35 SUBD OUT
36 SUBDIN
37 SUBCLK
38 N.C.
39 MRDY OUT
40 FCH
41 3DYCRESET
42 L_ERR
43 A IN/OUT
44 N443
45 PAL
46 SECAM
47 PAL_M
48 N358
49 PXOE
50 VSH OUT
No
. Pin name Function
51 REQ
52 MON SW
53 SPMUTE1
54 SPMUTE2
55 HPDET
56 SSTBY
57 VSH IN
58 LMUTE
59 V IN/OUT
60 SRESET
61 DENKA
62 VCC
63 CARDPOW
64 VSS
65 TV/AV1
66 AV1/AV2
67 VIS/3DS
68 AV/SY/DY2
69 AV/SY/DY1
70 STB
71 PMUTE
72 POWOUT
73 ADPPOW
74 IREM 2
75 MPRCS
76 MPRDA
77 MPCS
78 MPDA
79 MPCLK
80 DDCRESET
81 KEY4
82 KEY5
83 CARDRESET
84 SAW SW
85 MODE1
86 MODE2
87 SSYSTEM
88 SSW
89 AFT
90 AGC
91 KEY1
92 KEY2
93 KEY3
94 POWIN
95 VSYNC
96 AVSS
97 HSYNC
98 TVSETB
99 AVCC
100
CVIN
Pin functions of microprocessor IC (IC2001) RH-iXA460WJN1Q
Closed caption
Closed caption
Main switch ON[H]/OFF[L]
Off timer LED light-up
N.C.
Composite sync signal
Remote control
Grounding
Grounding
N.C.
N.C.
Reset at “L” level
Microprocessor oscillator connection
Grounding
Microprocessor oscillator connection
Power
OSD clock input
N.C.
Main power input
N.C.
OSD blanking output
DAC1 chip select
DAC2 chip select
D terminal connection detect
N.C.
I
2
C bus open/closed select input
I
2
C bus serial clock line 2
I
2
C bus serial clock line 1
I
2
C bus serial data line 1
I
2
C bus serial data line 2
R signal output
G signal output
B signal output
N.C.
N.C.
N.C.
N.C.
N.C.
3D Y/C separation IC reset (3D YC)
Fluorescent lamp error detect input
Audio input/output select
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
Panel gate driver voltage control
Adjustment process
BS fixed selector switch
Main Speaker mute
Sab Speaker mute
Headphone detect at “L” level
Speaker standby (at “H” level)
Panel gate driver voltage check
Line out audio mute
Video input/output select
Multiplex reset at “L” level
N.C.
Power
N.C.
Grounding
N.C.
N.C.
Analog switch 3 (3D YC)
CCD input select 2 (3D YC)
CCD input select 1 (3D YC)
N.C.
N.C.
DC/DC control output
N.C.
N.C.
G/A read enable
G/A data input
G/A chip select
G/A data output
G/A clock
Digital decoder reset
Key input 4
Key input 5
N.C.
N.C.
N.C.
N.C.
N.C.
S terminal connect input at “L” level
AFT voltage input
AGC voltage input
Key input 1
Key input 2
N.C.
DC/DC start-up detect
OSD vertical sync signal
Analog power input (GND)
OSD horizontal sync signal
Closed caption (GND)
OSD power input
Closed caption signal input