Acer AL2671W Service Manual page 24

Pin Definition Between Main Board and I/O Board
35 Audio_Center_Gnd_sig
nal (2)
36 Earphone_for_subpictu
re_R ( 2 )
37 Audio_Woofer_Gnd_gn
d ( 2 )
38 Audio_Rear_L_R_Gnd
_of_gnd ( 3 )
39 YUV_1_Pr_Return ( 6 )
40 YUV_1_Pb_Return ( 6 )
41 YUV_1_Y_Return ( 6 )
42 Audio_Front_L_R_Gnd
_of_Gnd
43 Teletext_Hs ( 3, from
mainboard )
44 Teletext_Hs_Vs_return
( 3 )
45 TV_Out
46 TV_R
47 TV_L
48 Audio_Mute
49 12V_max_1A_a ( 2 )
50 12V_max_1A_b ( 2 )
51 5V_max_1.5A_a ( 2 )
52 5V_max_1.5A_b ( 2 )
53 USDA
54 USCL
55 ID_1
56 ID_2
57 GND_3_of_(3)
58 Audio_Rear_L_R_Gnd
_of_L ( 3 )
59 YUV_2_Pr ( 3 )
60 YUV_2_Pb ( 3 )
61 YUV_2_Y ( 3 )
62 Audio_Front_L_R_Gnd
_of_L ( 3 )
LCD
Vendor & model name
LCD display area (diagonal, inch)
Display technology
24
Item
'Center' signal of surround audio channels.
After decoding Dolby digital or other surround audio, digital receiver sends
this signal to LCDTV main board for further processing.
Audio ' Right ' channel paired with sub-picture.
Ground signal paired with audio ' Woofer ' channel.
Ground signal of rear left and right audio channels.
After decoding Dolby digital or other surround audio, digital receiver sends
this signal to LCDTV main board for further processing.
Return path of ' Pr ' signal. It belongs to YUV signal set -1.
Return path of ' Pb ' signal. It belongs to YUV signal set -1.
Return path of ' Y ' signal. It belongs to YUV signal set -1.
'Ground' path paired with audio front "Left" and "Right"
Horizontal Sync signal. LCDTV main board issues it for the use of Teletext
decoder IC on the I/O module.
Common return path of horizontal and vertical sync signals which are
issued by LCDTV main board
Video output for signal set AV3_OUT
Audio 'Right' channel of signal set AV3_OUT
Audio 'Left' channel of signal set AV3_OUT
Disable all the analog audio signals from I/O modules
Power pins which supply +12V to digital receiver.
Power pins which supply +12V to digital receiver.
Power pins which supply +5V to digital receiver.
Power pins which supply +5V to digital receiver.
SDA signal issued by LCDTV main board to access ICs and
modules of analog option
SCL signal issued by LCDTV main board to access ICs and
modules of analog option
Identification signal -1
Identification signal -2
Power ground
Audio 'Left' channel paired with sub-picture.
'Pr' signal of YUV-2 signal set.
'Pb' signal of YUV-2 signal set.
'Y ' signal of YUV-2 signal set.
'Left' signal of audio rear channels.
Item
Specification
Specification
QDI
26 (660.5mm)
TFT
Chapter 1