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5 Troubleshooting
5 Troubleshooting
5-1 No Power
LAMP off, power indicator No
Check a connection a power cable.
LED red color?
Yes
Does proper DC 12V No
Change a Assy PCB Power.
appear at C801, C807?
Yes
Does proper DC A3.3V, No Check a IC812, IC801.
A5V appear at
Change a main PCB ass'y.
C865, C863?
Yes
Does proper DC 5V, 3.3V, No
1.9V appear at C870, C861, Check a IC813, IC811, IC807.
C847? Change a main PCB ass'y.
Yes
No Check a other function.
A power is supplied to set? (No picture part)
Replace a lcd panel.
5-1
5 Troubleshooting
5-2 No Video (Analog PC Signal)
Power Indicator is off.
Lamp on, no video.
Yes
Check a PC source and check No Input a analog PC signal and
the connection of DSUB cable? connected cable(DPMS).
Yes
Does the signal appear at No PC cable. Change a PC
1
#3, 5, 7(R, G, B) of IC906? cable. Change a main PCB ass'y.
Yes
Does the signal appear at No Check a IC906.
1
#21,19,15(R,G,B)of IC906? Change a main PCB ass'y.
Yes
Does the digital data appear No Check a IC312.
2 at output of
Change a main PCB ass'y.
DIN(0:23)of IC312?
Yes
Does the digital data appear at No Check a IC201.
3 output of
Change a main PCB ass'y.
LVDS TX(FT250~253)?
Yes
Check a LVDS cable? No
Replace a lcd panel? Please, Call to Samsung Co. LTD.
5-2
5 Troubleshooting
WAVEFORMS
1 R,G,B Output Signal of IC906 2 R,G,B Output Signal of IC312
3 Digital Output Data of IC201
5-3
5 Troubleshooting
5-3 No Video (HDMI-Digital Signal)_EXECT 23'
Power Indicator is off.
Lamp on, no video.
Yes
Check the connectionn No
Input a HDMI cable.
of HDMI cable?
Yes
Does the digital data IC311 No Check a a IC 311.
4 DIN(0:23),
HDMI(Data, Clk +/-)? Change a main PCB ass'y.
Yes
Does the digital data No
3 appear at output of IC201 Check a IC201.
LVDS(FX250~253)? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
5-4
5 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC201 4 Signal of HDMI(Data)
5-5
5 Troubleshooting
5-4 No Picture (Tuner_CVBS)
Power Indicator is off. No Connect the RF cable and
Lamp on, no picure. check RF signal.
Yes
Dose the signal No Check a B+ voltage (#7 of Tuner) :
5 5V change a main PCB ass'y
appear at #14 of IC203?
Yes
Does the signal appear at No
5 Check a IC203.
#13 of IC203? Change a main PCB ass'y.
Yes
Does the digital data appear at No Check a IC201.
3
output of FT250~FT253 ? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
5-6
5 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC201 5 Tuner_CVBS Output Signal
5-7
5 Troubleshooting
5-5 No Picture (Video_CVBS)
Power Indicator is off. No
Check a A/V cable and video signal.
Lamp on, no picure.
Yes
Dose the signal No
5 Check a connection harness.
appear at #11 of IC203?
Yes
Does the signal appear at No
5 Check a IC203.
#13 of IC203? Change a main PCB ass'y.
Yes
Does the digital data appear at No Check a IC515.
3
output of FT250~FT253? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
5-8
5 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC515 5 Tuner_CVBS Output Signal
5-9
5 Troubleshooting
5-6 No Picture (S-VIDEO_Y,C)
Power Indicator is off. No Connect the s-video cable.
Lamp on, no picure. Operating a video player.
Yes
Dose the signal appear at No
6 Check a connection harness.
R722, R721 of IC201?
Yes
Does the digital data appear at No Check a IC201.
3
Output of FT250~FT253? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
5-10
5 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC201 6 Analog Signal(Y,C) to IC201
5-11
5 Troubleshooting
5-7 No Sound
No
Picture is display, no sound. Connect a sound cable.
control a volume.
Yes
Does the signal appear at
Pin 51, 50(CH1_L, R Sound) No Check a connection harness and
7 and Pin 57, 58 headphone jack.
(CH2_L, R Sound)
of IC610 (MSP4410K)?
Yes
Check the DC 8V No Check a IC813.
8
of IC610? Change a main PCB ass'y.
Yes
Does the signal appear at No Check a IC611.
9
L617? Change a main PCB ass'y.
Yes
Replace the speaker ass'y?
5-12
5 Troubleshooting
WAVEFORMS
7 The Signal are Inputed to IC610 8 DC +8V
9 Output WaveForm
5-13
5 Troubleshooting
Memo
5-14