Akai LTA-26C904, Service Manual

Page: 33 / 50

32
(1) Socket definition
Serial
number
Position
number
Connecting object Function description
1 CON40
3
Power panel GND
，
GND
，
+12V
，
+12V
2 CON11 Power panel +12V ， +12V ， +12V ， GND ， GND ， GND ， +5V ，
+5V ， +5V ， +5V ， +5V
3 CON13 Back light control line GND
，
GND
，
back light switch control
，
back light
brightness control
4 CON14 Ke3.3V
、
GND
、
KEY1
、
KEY2
5 CON17 Remote control
receiving board
+3.3V
、
REMOTE
、
GND
、
indicator1
、
indicator1
6 CON4 Standby
7 CON5 Standby
8 CON1 LVDS interface of line
to screen
9 CON15 I
²
C
10 CON12 Power panel +5V_SB , +5V_SB , GND , GND , Power supply
control
11 CON13 Standby
12 CON8 Standby
13 CON9 Speaker L+,L-,R+,R-
14 CON10 Side AV board
15 J9 VGA audio signal input
16 J8 SCART2 input
17 J5 SCART1 input
18 J4 HDMI input
19 J2 HD, audio, video
signal input
20 J6 S terminal input
21 J3 VGA input
22 CON2 Standby
(2) Main components descriptions
Serial
numbe
r
Position
number
component Function description
A
U16 AT24C02BN-10SU-1.8 EEPROM
B
U14 74LVC14AD
VGA line and field synchronizing signal
shaping
C
U2 IS42S32200C1-6TL
2MX32bits SDRAM, used for video signal
access
D
U3 AT24C64A-10PU-2.7 EEPROM
E
U8 TCM809SENB713 MCU reset IC
F
U31 PI5C3306LE I
²
C bus switcher for program upgrading