Sharp LC-40LE240EK Service Manual ▷ View online
65
LC-32LE240
LC-40LE240
21.6. USB Problems
Problem: USB is not working or no USB Detection.
Check USB Supply, It should be nearly 5V.
21.7. No Sound Problem
Problem: No audio at main TV speaker outputs.
Check supply voltages of VDD_AUDIO, 5V_VCC and 3V3_VCC with a voltage-meter.
There may be a problem in headphone connector or headphone detect circuit (when
headphone is connected, speakers are automatically muted). Measure voltage at
HP_DETECT pin, it should be 3.3v.
21.8. No Sound Problem at Headphone
Problem: No audio at headphone output.
Check HP detect pin, when headphone is. Check 5V_VCC and 3V3_VCC with a voltage-
meter.
21.9. Standby On/Off Problem
Problem:
Device cannot boot, TV hangs in standby mode.
Check HP detect pin, when headphone is connected. Check 5V_VCC and 3V3_VCC
with a voltage meter.
with a voltage meter.
66
LC-32LE240
LC-40LE240
Check supply voltages of VDD_AUDIO, 5V_VCC and 3V3_VCC with a voltage-meter.
There may be a problem in headphone connector or headphone detect circuit (when
headphone is connected, speakers are automatically muted). Measure voltage at
HP_DETECT pin, it should be 3.3v.
21.8. No Sound Problem at Headphone
Problem: No audio at headphone output.
Check HP detect pin, when headphone is. Check 5V_VCC and 3V3_VCC with a voltage-
meter.
21.9. Standby On/Off Problem
Problem:
Device cannot boot, TV hangs in standby mode.
There may be a problem about power supply. Check 12V_VCC, 5V_VCC and 3V3_VCC
with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest
SW. Additionally it is goood to check SW printouts via hyper-terminal (or Teraterm).
These printouts may give a clue about the problem.
DVD Problems
Problem: DVD is not working.
Check that DVD source is selected in Service menu. Check supply voltage of DVD
namely 12V_VCC.
21.10. No Signal Problem
Problem: No signal in TV mode.
Check tuner supply voltage; 3V3_TUN. Check tuner options are correctly set in Service
menu. Check AGC voltage at IF_AGC pin of tuner.
There may be a problem about power supply. Check 12V_VCC, 5V_VCC and 3V3_VCC
with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest SW.
Additionally it is good to check SW printouts via hyper-terminal (or Teraterm).
These printouts may give a clue about the problem.
with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest SW.
Additionally it is good to check SW printouts via hyper-terminal (or Teraterm).
These printouts may give a clue about the problem.
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LC-32LE240
LC-40LE240
22. LC-32LE240 OVERALL WIRING DIAGRAM
P L306
C N706
C N2
C N709
1
24V
1 G ND
1
1
2
24V
2 G ND
2
2
3
24V
3 S T B Y _ON_OF F
3
3
4
24V
4 G ND
4
4
5
24V
5 B AC K LIG HT _ON_OF F
5 OP _P IN5
5
6
G ND
6 G ND
6 OP _P IN6
6
7
G ND
7 DIMMING
7 OP _P IN7
8
G ND
8 G ND
8 OP _P IN8
9
G ND
9 5V_S T B Y
9 OP _P IN9
10
A/D_DIM_S E L
10 12V_VC C
10 OP _P IN10
11
DIM_P WM_ANALOG
11 5V_VC C
11 OP _P IN11
12
B L_ON/OF F _1
12 5V_VC C
12 T X_A_0_N
13 12V_S T B Y
13 T X_A_0_P
14 12V_S T B Y
14 T X_A_1_N
P L205
15 3V3_VC C
15 T X_A_1_P
1
G ND
16 5V_VC C
16 T X_A_2_N
2
G ND
17 3V3_VC C
17 T X_A_2_P
3
S W_S WIT C H
18 5V_VC C
18 G ND
4
G ND
19 3V3_VC C
19 T X_A_C LK _N
5
S T _B Y
20 5V_VC C
20 T X_A_C LK _P
6
G ND
21 G ND
7
B L_ON/OF F
22 T X_A_3_N
8
G ND
23 T X_A_3_P
9
DIM_P WM_ANALOG
24 T X_A_4_N
10
G ND
25 T X_A_4_P
11
12V _1
26
12
12V _1
27 OP _P IN27
13
5V S T B Y
28 T X_B _0_N
14
24V _1
29 T X_B _0_P
15
4V 25_S T B Y
30 T X_B _1_N
16
4V 25_S T B Y
31 T X_B _1_P
17
V C C _3V 3_ON
32 T X_B _2_N
18
5V
33 T X_B _2_P
19
V C C _3V 3_ON
34 G ND
20
5V
35 T X_B _C LK _N
21
V C C _3V 3_ON
36 T X_B _C LK _P
MB 62 MAIN B OAR D
22
5V
37 G ND
23
G ND
38 T X_B _3_N
24
G ND
39 T X_B _3_P
25
V C C _AUDIO
40 T X_B _4_N
26
S T _B Y 2
41 T X_B _4_P
27
A/D_DIM_S E L
C N710
42 OP _P IN42
28
A/D_DIM_S E L
1 G ND
43 OP _P IN43
C N703
2 R _AUDIO_P
44 G ND
1 G ND
3 L_AUDIO_P
45 G ND
2 LE D 2
4 L_AUDIO_P
46 G ND
3 LE D 1
5 L_AUDIO_N
47
4 IR _IN
6 G ND
48 P ANE L_VC C
5 5V_S T B Y
49 P ANE L_VC C
50 P ANE L_VC C
51 P ANE L_VC C
50 P ANE L_VC C
51 P ANE L_VC C
1 G ND
2 LE D 2
3 LE D 1
4 IR _IN
5 5V_S T B Y
2 LE D 2
3 LE D 1
4 IR _IN
5 5V_S T B Y
T OUC H_P AD_OP T ION
K E Y B OAR D_ONB OAR D
G ND
3V3_S T B Y
S C L_S Y S
S DA_S Y S
3V3_S T B Y
S C L_S Y S
S DA_S Y S
TOUC H P AD
P L100
MODE L
MAIN B OAR D
P OWE R S UP P LY
LC 32LE 240E & LC 32LE 240E V
LC 32LE 240E K & LC 32LE 240R U
MB 62
P W07
MB62 / PW07 OVERALL WIRING DIAGRAM
S P E AK E R R IG HT
S P E AK E R LE F T
P W07 P OWE R S UP P LY B OAR D
P ANE L INVE R TE R B OAR D
LE D IR B OAR D
P ANE L T-C ON B OAR D
P L101
AC
POWER
PLUG
LED/IR CABLE
SPEAKER CABLE
LVDS CABLE
INVERTER CABLE
ROCKER
SWITCH
SWITCH
POWER CABLE
TOU
CH
CH
PA
D
C
A
BL
E
PARTS CODE 30070913
PARTS CODE 30072577
PARTS CODE 23012499
PAR
TS C
ODE 30069976
TS C
ODE 30069976
68
LC-22LE240
LC-40LE240
LC-40LE240 OVERALL WIRING DIAGRAM
P L306
C N706
C N137
C N709
1
24V
1 G ND
1 P ANE L_VC C
1 T OUC H_P AD_OP T ION
2
24V
2 G ND
2 P ANE L_VC C
2 K E Y B OAR D_ONB OAR D
3
24V
3 S T B Y _ON_OF F
3 P ANE L_VC C
3 G ND
4
24V
4 G ND
4 P ANE L_VC C
4 3V3_S T B Y
5
24V
5 B AC K LIG HT _ON_OF F
5 P ANE L_VC C
5 S C L_S Y S
6
G ND
6 G ND
6
6 S DA_S Y S
7
G ND
7 DIMMING
7 G ND
8
G ND
8 G ND
8 G ND
9
G ND
9 5V_S T B Y
9 G ND
10
A/D_DIM_S E L
10 12V_VC C
10 T X_A_0_N
11
DIM_P WM_ANALOG
11 5V_VC C
11 T X_A_0_P
12
B L_ON/OF F _1
12 5V_VC C
12 T X_A_1_N
13 12V_S T B Y
13 T X_A_1_P
14 12V_S T B Y
14 T X_A_1_N
P L205
15 3V3_VC C
15 T X_A_1_P
1
G ND
16 5V_VC C
16 T X_A_2_N
2
G ND
17 3V3_VC C
17 T X_A_2_P
3
S W_S WIT C H
18 5V_VC C
18 G ND
4
G ND
19 3V3_VC C
19 T X_A_C LK _N
5
S T _B Y
20 5V_VC C
20 T X_A_C LK _P
6
G ND
21 G ND
7
B L_ON/OF F
22 T X_A_3_N
8
G ND
23 T X_A_3_P
9
DIM_P WM_ANALOG
24 T X_A_4_N
10
G ND
25 T X_A_4_P
11
12V _1
26
12
12V _1
27 OP _P IN27
13
5V S T B Y
28 X_B _0_N
14
24V _1
29 T X_B _0_P
15
4V 25_S T B Y
30 T X_B _1_N
16
4V 25_S T B Y
31 T X_B _1_P
17
V C C _3V 3_ON
32 T X_B _2_N
18
5V
33 T X_B _2_P
19
V C C _3V 3_ON
34
20
5V
35 T X_B _C LK _N
21
V C C _3V 3_ON
36 T X_B _C LK _P
22
5V
37 G ND
23
G ND
38 T X_B _3_N
24
G ND
39 T X_B _3_P
25
V C C _AUDIO
40 T X_B _4_N
26
S T _B Y 2
41 T X_B _4_P
27
A/D_DIM_S E L
42 OP _P IN42
28
A/D_DIM_S E L
C N710
43 OP _P IN43
C N703
1 G ND
44 G ND
1 G ND
2 R _AUDIO_P
45 G ND
2 LE D 2
3 L_AUDIO_P
46 G ND
3 LE D 1
4 L_AUDIO_P
47
4 IR _IN
5 L_AUDIO_N
48 P ANE L_VC C
5 5V_S T B Y
6 G ND
49 P ANE L_VC C
50 P ANE L_VC C
51 P ANE L_VC C
50 P ANE L_VC C
51 P ANE L_VC C
1 G ND
2 LE D 2
3 LE D 1
4 IR _IN
5 5V_S T B Y
2 LE D 2
3 LE D 1
4 IR _IN
5 5V_S T B Y
S P E AK E R R IG HT
S P E AK E R LE F T
P W07 P OWE R B OAR D
LE D IR B OAR D
TOUC H P AD B OAR D
MB62 / PW07 OVERALL WIRING DIAGRAM
MB 62 MAIN B OAR D
P ANE L T-C ON B OAR D
P L100
P L101
MODE L
MAIN B OAR D
P OWE R S UP P LY
LC 40LE 240E & LC 40LE 240E V
LC 40LE 240E K & LC 40LE 240R U
MB 62
P W07
P ANE L INVE R TE R B OAR D
AC
POWER
PLUG
LED/IR CABLE
SPEAKER CABLE
LVDS CABLE
ROCKER
SWITCH
SWITCH
INVERTER CABLE
TOU
CH
CH
PA
D
C
A
BL
E
PARTS CODE 30071844
PARTS C
ODE 30072323
PARTS CODE 23012550
PAR
TS C
ODE 30069978
TS C
ODE 30069978
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