Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV LT-P227W 06_Troubleshooting
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5 Troubleshooting
5-1 No Power
LAMP off, power indicator No Check a connection a power cable.
LED red color? (BH39-10339X)
Yes
Does proper DC 14V No
Change a adaptor. (BN44-00109A)
appear at C605, C682, C686?
Yes
Does proper DC A3.3V, No Check a IC611,IC612,IC605.
A5V, A1.8V, D1.8V appear at Change a main PCB ass'y.
C684, C687,C645,C643? (BN94-00496X)
Yes
Does proper DC 5V, 3.3V, No Check a IC902, IC601, IC603, IC604,
2.5V, 9V, DNI1.8V appear at IC606, IC607. Change a main PCB
C609, C625, C635, C652, C654? ass'y. (BN94-00496X)
Yes
Does proper DC 33V, SNI_3.3V,
Check a IC602, FT403, FT406, FT407,
+3.3V_MD, +2.5V_MD1, No FT408, IC608, IC609, FT404.
+2.5V_MD2, 8V, 8V_3D , SNI_1.8V
Change a main PCB ass'y.
appear at C613, C437, C463, C477,
(BN94-00496X)
C484, C664, C666, C453?
Yes
Check a other function.
No (No picture part)
A power is supplied to set?
Replace a lcd panel.
(BN07-00125A, BN07-00114A)
LTP227W 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 DVI cable? connected cable. (BN39-00310A)
Yes
Does the signal appear at No Check IC102, PC cable. Change a PC
1
#15, 19, 21 (R, G, B) of IC102 cable. Change a main PCB ass'y
(BN94-00496X).
Yes
Does the digital data No Check a IC101 and IC107.
2 appear at output of Change a main PCB ass'y
RA101~RA104, RA106, RA107 ? (BN94-00496X).
Yes
Does the digital data No Check a IC565, IC105 and IC506.
3 appear at output of Change a main PCB ass'y
RA555~RA559, RA561? (BN94-00496X).
Yes
No Check a IC403.
Does the digital data appear at
4 Change a main PCB ass'y
output of RA402~RA407?
(BN94-00496X).
Yes
Does the digital data appear at No Check a IC503.
5
output of FT501~FT503, FT505? Change a main PCB ass'y
(BN94-00496X).
Yes
Check a LVDS cable? No
Replace a lcd panel? Please, Call to Samsung Co. LTD.
(BN07-00114A, BN07-00125A)
5-2 LTP227W
5 Troubleshooting
WAVEFORMS
1 R,G,B Output Signal (#15,19,21) Of IC102 2 R,G,B Output Signal Of IC101
3 Output Digital Signal of IC565 4 Output Digital Signal of IC403
5 Digital Output Data of IC503
LTP227W 5-3
5 Troubleshooting
5-3 No Video (Digital PC Signal)
Power Indicator is off.
Lamp on, no video.
Yes
Check a PC source and check No Input a digital PC signal and
the connectionn of DVI cable? connected cable. (BN39-00126A)
Yes
Does the digital data appear No
6
at FT302 ~FT305 (Data, Clk +/-)? Check a DVI cable . (BN39-00126A)
Yes
Does the digital data No Check a IC301 and IC105.
7 appear at output of Change a main PCB ass'y
RA308~RA311, RA313, RA314 ? (BN94-00496X).
Yes
Does the digital data No Check a IC565, IC105 and IC506.
3 appear at output of Change a main PCB ass'y
RA555~RA559, RA561? (BN94-00496X).
Yes
No Check a IC403.
Does the digital data appear at
4 Change a main PCB ass'y
output of RA402~RA407?
(BN94-00496X).
Yes
Does the digital data appear at No Check a IC503.
5
output of FT501~FT503, FT505 ? Change a main PCB ass'y
(BN94-00496X).
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
(BN07-00114A, BN07-00125A)
5-4 LTP227W
5 Troubleshooting
WAVEFORMS
3 Output Digital Signal of IC565 4 Output Digital Signal of IC403
5 Digital Output Data of IC503 6 Signal of DVI_RX 0~2 (Data)
6-1 Signal of DVI_RXC (CLK) 7 Digital Output Signal Of IC301
LTP227W 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. (AA39-00039A)
Yes
Dose the signal No Check a B+ voltage (#9, #7 of Tuner) :
8
appear at #1 of IC202? 33V, 5V change a main PCB ass'y
(BN94-00496X).
Yes
Does the signal appear at No Check a IC202 and IC303.
9 Change a main PCB ass'y
#72 (Y), #71 (C) of IC201?
(BN94-00496X).
Yes
Does the digital data No Check a IC201.
10 appear at output of Change a main PCB ass'y
RA201, 202 (Y), RA203, 204 (C)? (BN94-00496X).
Yes
Does the digital data No Check a IC405 and IC406.
11 appear at output of Change a main PCB ass'y
RA408, 409 (Y), RA416, 417(C)? (BN94-00496X).
Yes
Does the digital data No Check a IC565, IC105 and IC506.
3 appear at output of Change a main PCB ass'y
RA555~RA559, RA561? (BN94-00496X).
Yes
Does the digital data appear at No Check a IC403.
4
output of RA402~RA407? Change a main PCB ass'y
(BN94-00496X).
Yes
Does the digital data appear at No Check a IC503.
5
output of FT501~FT503, FT505 ? Change a main PCB ass'y
(BN94-00496X).
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
(BN07-00114A, BN07-00125A)
5-6 LTP227W
5 Troubleshooting
WAVEFORMS
3 Output Digital Signal of IC565 4 Output Digital Signal of IC403
5 Digital Output Data of IC503 8 Tuner_CVBS Output Signal
LTP227W 5-7
5 Troubleshooting
WAVEFORMS
9 Analog Signal (Y,C) to IC201 10 3230 Y,C_OUT (0:7) Data
11 Digital Output Y,C_OUT (0:7) Data Of IC405
5-8 LTP227W
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. (BN39-00057A)
Yes
Dose the signal No Check a connection harness.
8
appear at #6 of IC202? Change a A/V input jack ass'y
(BN96-00894A).
Yes
Does the signal appear at No Check a IC202.
9 Change a main PCB ass'y
#72 (Y), #71 (C) of IC201?
(BN94-00496X).
Yes
Does the digital data No Check a IC201 and IC902.
10 appear at output of Change a main PCB ass'y
RA201, 202 (Y), RA203, 204 (C)? (BN94-00496X).
Yes
Does the digital data No Check a IC405 and IC406.
11 appear at output of Change a main PCB ass'y
RA408, 409 (Y), RA416, 417(C)? (BN94-00496X).
Yes
Does the digital data No Check a IC565, IC105 and IC506.
3 appear at output of Change a main PCB ass'y
RA555~RA559, RA561? (BN94-00496X).
Yes
Does the digital data appear at No Check a IC403.
4
output of RA402~RA407? Change a main PCB ass'y
(BN94-00496X).
Yes
Does the digital data appear at No Check a IC503.
5
output of FT501~FT503, FT505 ? Change a main PCB ass'y
(BN94-00496X).
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
(BN07-00114A, BN07-00125A)
LTP227W 5-9
5 Troubleshooting
WAVEFORMS
3 Output Digital Signal of IC565 4 Output Digital Signal of IC403
5 Digital Output Data of IC503 8 Tuner_CVBS Output Signal
5-10 LTP227W
5 Troubleshooting
WAVEFORMS
9 Analog Signal (Y,C) to IC201 10 3230 Y,C_OUT (0:7) Data
11 Digital Output Y,C_OUT (0:7) Data Of IC405
LTP227W 5-11
5 Troubleshooting
5-6 No Picture (S-VIDEO_Y,C)
No Connect the s-video cable.
Power Indicator is off.
Operating a video player.
Lamp on, no picure.
(BN39-00060A)
Yes
Dose the signal appear at No Check a connection harness.
9
#8 (Y), #10 (C) of IC202? Change a A/V input jack ass'y
(BN96-00894A).
Yes
Does the signal appear at No Check a IC202.
12 Change a main PCB ass'y
C335 (Y), C336 (C)?
(BN94-00496X).
Yes
Does the signal appear at No Check a IC303.
9
#72 (Y), #71 (C) of IC201? Change a main PCB ass'y
(BN94-00496X).
Yes
Does the digital data No Check a IC201 and IC902.
10 appear at output of Change a main PCB ass'y
RA201, 202 (Y), RA203, 204 (C)? (BN94-00496X).
Yes
Does the digital data No Check a IC405 and IC406.
11 appear at output of Change a main PCB ass'y
RA408, 409 (Y), RA416, 417 (C)? (BN94-00496X).
Yes
Does the digital data No Check a IC565, IC105 and IC506.
3 appear at output of Change a main PCB ass'y
RA555~RA559, RA561? (BN94-00496X).
Yes
Does the digital data appear at No Check a IC403.
4
Output of RA402~RA407? Change a main PCB ass'y
(BN94-00496X).
Yes
Does the digital data appear at No Check a IC503.
5
Output of FT501~FT503, FT505? Change a main PCB ass'y
(BN94-00496X).
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
(BN07-00114A, BN07-00125A)
5-12 LTP227W
5 Troubleshooting
WAVEFORMS
3 Output Digital Signal of IC565 4 Output Digital Signal of IC403
5 Digital Output Data of IC503 9 Analog Signal (Y,C) to IC201
LTP227W 5-13
5 Troubleshooting
WAVEFORMS
10 3230 Y,C_OUT (0:7) Data 11 Digital Output Y,C_OUT (0:7) Data Of IC405
12 SVHS_Y,C Input Signal to IC202
5-14 LTP227W
5 Troubleshooting
5-7 No Picture (Component1, 2 : 480i, 480p, 720p, 1080i [Y, Pb, Pr])
Power Indicator is off. No Connect the RCA cable.
Lamp on, no video. Operating a DTV STB and DVD player.
(BN39-00279A)
Yes
Dose the signal appear at No Check a IC103 and IC902.
13 output Pin (#19_Y, #15_Pb, Change a main PCB ass'y
#21_Pr) of IC103 ? (BN94-00496X).
Yes
Does the signal appear at No Check a IC102 .
14 output #15_Pr, 19_Y, Change a main PCB ass'y
21_Pb of IC102 ? (BN94-00496X).
Yes
Does the digital data No Check a IC101 and IC107.
2 appear at output of Change a main PCB ass'y
RA101 ~RA104, RA106, RA107 ? (BN94-00496X).
Yes
Does the digital data No Check a IC565, IC105 and IC506.
3 appear at output of Change a main PCB ass'y
RA555~RA559, RA561? (BN94-00496X).
Yes
No Check a IC403.
Does the digital data appear at
4 Change a main PCB ass'y
output of RA402~RA407?
(BN94-00496X).
Yes
Does the digital data appear at No Check a IC503.
5
output of FT501~FT503, FT505 ? Change a main PCB ass'y
(BN94-00496X).
Yes
Check a LVDS cable? No
Replacea lcd panel? Please, Call to Samsung Co. LTD.
(BN07-00114A, BN07-00125A)
LTP227W 5-15
5 Troubleshooting
WAVEFORMS
2 R,G,B Output Signal Of IC101 3 Output Digital Signal of IC565
4 Output Digital Signal of IC403 5 Digital Output Data of IC503
13 Output Signal of IC103 (Y,Pb,Pr) 14 Input Signal (Y,Pb,Pr) to IC102
5-16 LTP227W
5 Troubleshooting
5-8 No Sound
No Connect a sound cable.
Picture is display, no sound. (BN39-00148A,BN39-00448A)
control a volume.
Yes
Does the signal appear at
Pin 67 (Tuner Sound signal) and
Check a connection harness and
Pin 47,48 (PC Sound) and No headphone jack.
15 Pin 53, 54 (COMP1_L, R Sound) and
Change a A/V input jack ass'y
Pin 56, 57 (COMP2_L, R Sound) and
(BN96-00894A).
Pin 50, 51 (VCR) of IC703
(MSP3420G)?
Yes
Check the DC +8V, +9V, +5V No Check a IC601, IC606 and IC607.
16
of IC703, IC701? Change a main PCB ass'y
(BN94-00496X).
Yes
Does the signal appear at No Check a IC701.
17
L701 ~L704 ? Change a main PCB ass'y
(BN94-00496X).
Yes
Replace the speaker ass'y?
(BN96-00714A(L), BN96-00716(R))
LTP227W 5-17
5 Troubleshooting
WAVEFORMS
15 The Signal are Inputed to IC703 16 DC +8V
17 Output WaveForm
5-18 LTP227W
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