Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD Proj LE32T51 20050921103757437_4_trouble_203
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4 Troubleshooting
4 Troubleshooting
4-1 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 C820, C823?
Yes
Does proper DC A3.3V, No Check a IC816, IC815
A5V appear at
Change a main PCB ass'y.
C834, C830?
Yes
Does proper DC 5V, 3.3V, No
1.8V appear at C813, C811, Check a IC821, IC811
C816? 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.
4-1
4 Troubleshooting
4-2 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
R781, R782, R783? cable. Change a main PCB ass'y.
Yes
Does the digital data appear
at output of No Check a IC310.
3
LVDS TX(R422~R425, Change a main PCB ass'y.
R430~R433)?
Yes
Check a LVDS cable? No
Replace a lcd panel? Please, Call to Samsung Co. LTD.
4-2
4 Troubleshooting
WAVEFORMS
1 R,G,B Output Signal 3 Digital Output Data of IC310
4-3
4 Troubleshooting
4-3 No Video (DVI-Digital Signal)
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 appear at No HDMI cable change a HDMI cable
4 FT2704, 2705, 2706, 2708? change a main PCB ass'y.
Yes
Does the digital data
No
3 appear at output of IC310 Check a IC310.
LVDS(R422~R425, R430~R433)? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
4-4
4 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC310 4 Signal of DVI(Data)
4-5
4 Troubleshooting
4-4 No Picture (Tuner_CVBS)
Power Indicator is off. No Connect the RF cable and
Lamp on, no picure. check RF signal.
Yes
Does the signal appear at No
5 Check a IC210.
C268? Change a main PCB ass'y.
Yes
Does the digital data appear No
3 at output of R422~R425, Check a IC310.
R430~R433? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
4-6
4 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC310 5 Tuner_CVBS Output Signal
4-7
4 Troubleshooting
4-5 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 R7003?
Yes
Does the digital data appear No
3 at output of R422~R425, Check a IC310.
R430~R433? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
4-8
4 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC310 5 Tuner_CVBS Output Signal
4-9
4 Troubleshooting
4-6 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.
R7001, R7002?
Yes
Does the digital data appear No Check a IC310.
3 at Output of R422~R425,
R430~R433? Change a main PCB ass'y.
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
4-10
4 Troubleshooting
WAVEFORMS
3 Digital Output Data of IC310 6 Analog Signal(Y,C)
4-11
4 Troubleshooting
4-7 No Sound
No
Picture is display, no sound. Connect a sound cable.
control a volume.
Yes
Does the signal appear at
Pin 12, 1(CH1_L, R Sound) No Check a connection harness and
7 and Pin 15, 2 headphone jack.
(CH2_L, R Sound)
of IC613?
Yes
Check the DC 8V No Check a IC813.
8
appear at C653? Change a main PCB ass'y.
Yes
Does the signal appear at No Check a IC611.
9
L624_OP, L625_OP? Change a main PCB ass'y.
Yes
Replace the speaker ass'y?
4-12
4 Troubleshooting
WAVEFORMS
7 The Signal are Inputed to IC610 8 DC +8V
9 Output WaveForm
4-13
4 Troubleshooting
Memo
4-14
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