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CONFIDENTIAL
5 Troubleshooting
5-1 No Power
No
LAMP off, Power indicator LED off. Check a connection the 14V adapter?
Yes
Does proper DC 14V No
1 Change a 14V adaptor. (BN44-00051C)
appear at Pin 1 of CN205?
Yes
Does proper DC 14V No Check a connection the 6 Pin hamess and
2
appear at C847? change a input board assy. (BN59-00339A)
Yes
Does proper DC +3.3V_A, No IC801 or IC805 are bad.
3 +3.3V_B appear at
Change main assy. (BN94-00400A)
C826, C867?
Yes
Does proper DC +2.5V_A, No IC802 or IC806 are bad.
4 +2.5V_B appear at
Change main assy. (BN94-00400A)
C827, C813?
Yes
Does proper DC +5V_A, +5V, No IC810 or IC804 or ICP22 are bad.
5 +5V_LVDS appear at
Change main assy. (BN94-00400A)
C889, C865, CP133?
Yes
Does proper DC +12V_3 No ICP23 is bad.
6
appear at C841? Change main assy. (BN94-00400A)
Yes
Does proper DC +8V No IC843 is bad.
7
appear at C843? Change main assy. (BN94-00400A)
Yes
No Check a other function. (No picture part)
A power is supplied to set.
Replace a assy LCD panel. (BN91-00388L)
LW22A13W 5-1
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
1 2 3
4 5 6
7
5-2 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-2 No Video (Analog PC Signal)
Power indicator is green,
Lamp on, No video.
Yes
Check the PC signal and check No Input a analog signal and
connection of FPC DVI cable? connected cable.
Yes
Does the signal appear at No Change FPC cable (CN100) or change a
8
#18, 16, 14 (R, G, B) of CN100? input board assy. (BN59-00339A)
Yes
Does the signal appear at No IC350 is bad.
9 output of IC350?
Change main board assy. (BN94-00400A)
(#70_R, #2_G, #12_B)
Yes
Does the signal appear at No IC001 or ICP18 or ICP19 are bad.
10 output of [#1_R(IC001),
Change main board assy. (BN94-00400A)
#1_G(ICP19), #15_B(IC001)]?
Yes
Does the signal appear at CR01, No IC200 is bad.
11
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
12
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-3
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
8 9 10
11 12
5-4 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-3 No Video (Digital PC Signal)
Power indicator is green,
Lamp on, No video.
Yes
Check the PC signal and check No Input a digital signal and
connection of FPC DVI cable? connected cable.
Yes
Does the clock pulse appear at No Change FPC cable. (CN100)
13
#5~12 (Data, Clk +/-) of CN100? Change a input board assy. (BN59-00339A)
Yes
Does the clock pulse appear at No
14
ICP01 is bad.
output at Rap18~RAP21,
Change main board assy. (BN94-00400A)
Rap28, 29 of ICP18, ICP19?
Yes
Does the signal appear at No IC001 or ICP18 or ICP19 are bad.
15 output of [#1_R(IC001),
Change main board assy. (BN94-00400A)
#1_G(ICP19), #15_B(IC001)]?
Yes
Does the signal appear at CR01, No IC200 is bad.
16
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock appear at No IC300 or IC901 are bad.
17
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-5
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
13 14 15
16 17
5-6 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-4 No Picture (Tuner_CVBS)
Power indicator is off, No Connect the RF cable and
Lamp on, No picture. check RF signal.
Yes
No Check the DC voltage. (#4 of tuner) : 10V~33V
18 Does the signal appear at R2?
Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN101)
19
C042(#1) of input? Change a input board assy. (BN59-00339A)
Yes
Does the clock pulse appear at No IC010 is bad.
20
3230Y, C_OUT(0:7) of IC010? Change main board assy. (BN94-00400A)
Yes
Does the clock pules appear at No IC001 or ICP18 are bad.
21
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
22
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock appear at No IC300 or IC901 are bad.
23
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-7
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
18 19 20
21 22 23
5-8 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-5 No Picture (Video_CVBS)
Power indicator is off, No Connect the video cable.
Lamp on, No picture. Operating a video player.
Yes
No Change s video cable.
24 Does the signal appear at R8?
Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN101)
25
C046(#8) of input IC011? Change a input board assy. (BN59-00339A)
Yes
Does the clock pulse appear at No IC010 is bad.
26
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pules appear at No IC001 or ICP18 are bad.
27
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
28
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
29
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-9
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
24 25 26
27 28 29
5-10 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-6 No Picture (S-Video_Y, C)
Power indicator is off, No Connect the S-Video cable.
Lamp on, No picture. Operating a video player.
Yes
Does the signal No Chagne a S-Video cable.
30
appear at R9, R10 (Y, C)? Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN101)
31 C044(#5, Y), C045(#6, C) of
Change a input board assy. (BN59-00339A)
input IC011?
Yes
Does the clock pulse appear at No IC010 is bad.
32
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC001 or ICP18 are bad.
33
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
34
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
35
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-11
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
30 31 32
33 34 35
5-12 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-7 No Picture (SCART1, 2_CVBS : Low Resolution)
Power indicator is off, No Connect the scart cable.
Lamp on, No picture. Operating a video player.
Yes
Does the signal appear at No Chagne a scart cable.
36
R98, R102 (SC1, 2 CVBS)? Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN102)
37 C043(#3, SC1), C048(#10, SC2)
Change a input board assy. (BN59-00339A)
of input IC011?
Yes
Does the clock pulse appear at No IC010 is bad.
38
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC001 or ICP18 are bad.
39
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
40
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
41
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-13
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
36 37 38
39 40 41
5-14 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-8 No Picture (SCART1 R, G, B : High Resolution)
No Connect the scart cable.
Power indicator is off,
Operating a video player.
Lamp on, No picture.
(Select R, G, B input mode)
Yes
Does the signal appear at No Chagne a scart cable.
42
R101(R), R100(G), R99(B)? Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN102)
43 R123(#7, R), R122(#9, G),
Change a input board assy. (BN59-00339A)
R121(#11, B) of input IC013?
Yes
Does the clock pulse appear at No IC010 is bad.
44
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear No IC001 or ICP18 are bad.
45
at output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
46
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
47
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-15
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
42 43 44
45 46 47
5-16 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-9 No Sound
No Connect the sound cable.
Picture is display. (RF, Video, Scart, PC etc)
Connect a speaker wire.
Yes
Does the signal appear at
Pin 67 (Tuner sound signal) and Pin
47, 48 (PC sound) and Pin 53, 54 No Chagne a FPC cable. (CN101)
48
(SCART1 sound) and Pin 56, 57 Change a input board assy. (BN59-00339A)
(SCART2 sound) and Pin 50, 51
(VCR) of IC919 (MSP3451G)?
Yes
Check the DC +8V, No Power rugulator IC (ICP23) are bad.
49
+12V_3 of IC919, IC501? Change main board assy. (BN94-00400A)
Yes
Does the signal No Sound IC (IC919 or IC501) are bad.
50
appear at L501~L504? Change main board assy. (BN94-00400A)
Yes
Replace the speaker assy
BN96-00176A (R),
BN96-00177A (L)?
LW22A13W 5-17
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
48 49 50
5-18 LW22A13W