Main Lcd Trouble - LG -S310 Service Manual

4. TROUBLE SHOOTING

4.11 Main LCD Trouble

Check the Main LCD power and signal
-VMEM_1V8 (TP2), VIO_2V8 (TP1)
-LCD_CS_N (TP3), LCD_RS (TP4), LCD_RD_N (TP5), LCD_WR_N (TP6), LCD_D_[0] (TP7)
VBAT
LCD_LED_CA1
LCD_LED_CA2
LCD_LED_CA3
LCD_IF_MODE2
LCD_IF_MODE1
LCD_VSYNCOUT
LCD_F_RD_N
LCD_F_WR_N
LCD_F_RS
LCD_RST_N
LCD_F_CS_N
LCD_F_DATA[11]
LCD_F_DATA[10]
LCD_F_DATA[9]
LCD_F_DATA[8]
LCD_F_DATA[3]
LCD_F_DATA[2]
LCD_F_DATA[1]
LCD_F_DATA[0]
LCD_MAKER_ID
Checking Point
LGE Internal Use Only
TP2
CN600
35
34
33
32
31
30
29
TP600
28
27
26
25
24
23
22
VA600
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
VA805
C607
1u
Figure 4.11.1 Main LCD Circuit
TP1
LCD_F_CS_N
LCD_F_RS
LCD_F_DATA[15]
LCD_F_RD_N
LCD_F_DATA[14]
LCD_F_WR_N
LCD_F_DATA[13]
LCD_F_DATA[12]
LCD_F_DATA[7]
LCD_F_DATA[6]
LCD_F_DATA[6]
LCD_F_DATA[5]
LCD_F_DATA[4]
LCD_F_DATA[4]
LCD_F_DATA[2]
LCD_F_DATA[0]
C608
1u
- 96 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
TP1
TP2
VMEM_1V8
R602
FL600
100K
TP
LCD_CS_N
IN4 OUT4
TP4
4 8
LCD_RS
IN3 OUT3
TP4
TP5
3 7
LCD_RD_N
IN2 OUT2
2 6
TP6
LCD_WR_N
IN1 OUT1
1 5
FL601
LNAND_D_[06]
IN4 OUT4
4 8
LNAND_D_[04]
IN3 OUT3
3 7
LNAND_D_[02]
IN2 OUT2
2 6
LNAND_D_[00]
IN1 OUT1
TP7
1 5
Only for training and service purposes