Sharp LC-20B1U Service Manual page 17

Pin functions of microprocessor IC (IC2001) RH-iXA276WJZZQ
No. Pin name Function
1 V HOLD Closed caption
2 HLF Closed caption
3 MAIN SW
Main switch ON[H]/OFF[L]
4 TIMELED
Off timer LED light-up
5 M/S OUT
Sub-microprocessor master/slave output
6 CSYNC
Composite sync signal
7 IREMI
Remote control
8 GND
Grounding
9 GND
Grounding
10 XCIN 32kHz oscillation input
11 XOUT 32kHz oscillation output
12 RESET Reset at "L" level
13 XOUT Microprocessor oscillator connection
14 GND Grounding
15 XIN Microprocessor oscillator connection
16 VCC
Power
17 OSCIN
OSD clock input
18 OSCOUT
OSD clock output
19 PSWIN
Main power input
20 SUBREADY
Sub-microprocessor ready input
21 BLK
OSD blanking output
22
23 DAC1CS
DAC1 chip select
24 DAC2CS DAC2 chip select
25 D SW D terminal connection detect
26 DTV D terminal control line
27 MRDY I 2 C bus open/closed select input
28 SCL2 I 2 C bus serial clock line 2
29 SCL1 I 2 C bus serial clock line 1
30 SDA1 2
I C bus serial data line 1
31 SDA2 2
I C bus serial data line 2
32 R
R signal output
33 G
G signal output
34 B
B signal output
35 SUBD OUT
Sub-microprocessor data output
36 SUBDIN
Sub-microprocessor data input
37 SUBCLK Sub-microprocessor clock input
38
39 MRDY OUT I 2 C bus open/closed output
40 FCH No-signal field ID signal output
41 IREM OUT Not used
42 L_ERR Fluorescent lamp error detect input
43 S IN/OUT
Audio input/output select
44 N443
"H" for N443, "L" for others
45 PAL
"H" for PAL, "L" for others
46 SECAM
"H" for SECAM, "L" for others
47 PAL_M
"H" for PAL-M, "L" for others
48 N358
"H" for N358, "L" for others
49 PXOE
Card (Card mode at "L" level)
50 VSH OUT
Panel gate driver voltage control
No. Pin name Function
51 REQ Adjustment process
52 AV/SY/DY2 US CCD input select
53 FSMUTE
Front mute
54 RSMUTE
Rear mute
55 HPDET
Headphone detect at "L" level
56 SSTBY
Speaker standby (at "H" level)
57 VSH IN
Panel gate driver voltage check
58 LMUTE
Line out audio mute
59 V IN/OUT
Video input/output select
60 SRESET Multiplex reset at "L" level
61 DENKA Electric charge prevention
62 VCC Power
63 CARDPOW Card (ON/OFF)
64 VSS Grounding
65 TV/AV1 Analog switch 1
66 AV/AV2
Analog switch 2
67 VIS/3DS
Analog switch 3
68 AV1/VISY
Analog switch 4
69 AV/SY/DY1
US CCD input select 2
70 STD
Microprocessor power off output
71 PMUTE
P mute
72 POWOUT
DC/DC control output
73 AD POW
Adaptor ON/OFF input
74 IREM 2 Reception at slave
75 MPRCS G/A read enable
76 MPRDA G/A data input
77 MPCS G/A chip select
78 MPDA G/A data output
79 MPCLK G/A clock
80 DDCRESET
Digital decoder reset
81 KEY4
Key input 4
82 KEY5
Key input 5
83 CARDRESET
Card reset (at "H" level)
84 SAW SW
Tuner select (at "H" level)
85 MODE1
Tuner select (at "H" level)
86 MODE2
Tuner select (at "H" level)
87 SSYSTEM S system switching detect
88 SSW S terminal connect input at "L" level
89 AFT AFT voltage input
90 AGC AGC voltage input
91 KEY1 Key input 1
92 KEY2 Key input 2
93 KEY3
Key input 3
94 POWIN
DC/DC start-up detect
95 VSYNC
OSD vertical sync signal
96 AVSS
Analog power input (GND)
97 HSYNC
OSD vertical sync signal
98 TVSETB
Closed caption (GND)
99 AVCC
OSD power input
100 CVIN
Closed caption signal input
17
LC-20B1U