Daewoo -- DLT-26C2.pdf

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S/M NO. : DSL500TEF0
Service Manual
LCD TV
CHASSIS : SL-500T
Model : DLT-26C2
DLT-26C3
DLT-32C1
DLT-32C2
DLT-32C3
DLT-32C6
DLT-32C7
DLT-37C3
DLT-37C7
Sep. 2007
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Contents
1.Safety Precaution ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 3
2.Product Specification ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 4
2-1.Product Specificationꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 4
2-2.Available Input Signal ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 5
3.Block Diagram ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 6
3-1.Block Diagram(Signal) ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 6
3-2.Block Diagram(Power) ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 7
4.Description of Each Block ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 8
4-1.Block Diagram of Main IC and TP ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 8
4-2.Overview ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 9
4-2-1.Composite video, Y/C(S-Video) and SCART(CVBS, RGB) composite video ꆦ 9
4-2-2.DTV/DVD signal ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 11
4-2-3.PC(Personal Computer)signal ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 13
4-2-4.HDMI signal ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 15
4-2-5.R/G/B Processing(SCART1, TELETEXT R/G/B) ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 15
4-2-6.Audio signal processing, KEY, and LED ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 17
4-3.POWER PCB ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 21
5.SERVICE MODE ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 24
5-1.Entering SERVICE MODE ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 24
6.Main PCBs Trouble Diagnosis ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 26
6-1.Main PCBs Trouble Diagnosisꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 26
6-1-1.Common checking process when “No signal of Noraster” ꆦꆦꆦꆦꆦꆦꆦꆦꆦ 26
6-1-2.When No Sound ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 33
6-1-3.When Control Key does not operateꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 35
6-1-4.When Remote Controller does not operateꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 36
6-2.POWER PCB ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 38
7.Trouble Diagnosisꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 39
7-1.Facts you must know when Diagnosis or Repairingꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 39
7-2.Typical Symptoms of PCB problem or bad connection ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 40
8.Structure of LCD Set ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 41
9.Exploded View ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 43
10.Service Part List ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ 52
11.Circuit Diagram ꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦꆦ‹
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1. Safety Precautions
(1) When moving or laying down a LCD Set, please deal with care. Avoid any impact towards
the LCD Set.
(2) Do not leave a broken LCD Set on for a long time. To prevent any further damages, after
check the broken Set’s condition, make sure to turn the power (AC) off.
(3) When opening the BACK COVER, you must turn off power (AC) to prevent any electric
shock.
(4) When loosening screws, check the connecting position and type of the screw.
Sort out the screws and store them separately
Because screws holding PCBs are working as electric circuit grounding,
make sure to check if any screw is missing when assembling.
(5) A LCD Set contains different kinds of connector cables.
When connecting or disconnecting connector cables, check the direction and position
of the cable beforehand.
(6) When disconnecting connectors unplug the connectors slowly with care.
(7) Connectors are designed so that if the number of pins or the direction does not match,
connectors will not fit.
When having problem in plugging the connectors, make sure to check their kind, position,
and direction.
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2. Product Specification
2-1.PRODUCT SPECIFCATION
Features
DLT-26C2SMDB DLT-32C6LMBD
DLT-32C6SMBD
DLT-37C3LMBD
Screen Size
26”
32”
32”
37”
Aspect Ratio
16 : 9
16 : 9
16 : 9
16 : 9
Resolution
1366x768(WXGA)
1366x768(WXGA)
1366x768(WXGA)
1366x768(WXGA)
LCD Panel
0.421(H) x
0.140(W)*3mm
170.25um x
510.75um x RGB
0.51075(H) x
0.17025(W)*3
0.200mm x
0.600mm x RGB
Pixel Pitch
Contrast
Ratio
Receiving
System
Stereo
System
1200 : 1
800 : 1
800 : 1
800 : 1
PAL, SECAM
PAL, SECAM
PAL, SECAM
PAL, SECAM
FM MONO /
2-Carrier, NICAM
FM MONO /
2-Carrier, NICAM
FM MONO /
2-Carrier, NICAM
FM MONO /
2-Carrier, NICAM
TV System
Channel
Memory
ANALOG : 0~99CH
ANALOG : 0~99CH
ANALOG : 0~99CH ANALOG : 0~99CH
RF
75 Ohm Coaxial
75 Ohm Coaxial
75 Ohm Coaxial
75 Ohm Coaxial
S-Video
1
1
1
1
SCART
2
2
2
2
Input
Connector
Component
RCA X 1
RCA X 1
RCA X 1
RCA X 1
PC RGB
D-Sub X 1
D-Sub X 1
D-Sub X 1
D-Sub X 1
PC Audio
3.5mm Mini-Jack
3.5mm Mini-Jack
3.5mm Mini-Jack
3.5mm Mini-Jack
HDMI
1
1
1
1
Output
Connector
Headphone
3.5mm Mini-Jack
3.5mm Mini-Jack
3.5mm Mini-Jack
3.5mm Mini-Jack
Sound
Output
10W
10W
10W
10W
Max
100W
115W
135W
150W
Power
Consumption
Power
Source
180VAC ~ 264VAC,
50~60Hz
180VAC ~ 264VAC,
50~60Hz
180VAC ~ 264VAC,
50~60Hz
180VAC ~ 264VAC,
50~60Hz
Se Dimension
Dimension
(W x H x D)
812 x 502.7 x 240
806 x 628.5 x 250
806 x 628.5 x 250
940 x 720 x 328.7
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Product Specification
2-2.Available Input Signal
2-2-1.HDMI/PC/COMPONENT
Resolution
V-freg
HDMI
PC(D-Sub)
Component
Standard
60Hz
O
O
X
640 x 480
72Hz
O
O
X
75Hz
O
O
X
VESA Standard
60Hz
O
VESA Standard
O
X
800 x 600
72Hz
O
O
X
VESA Standard
75Hz
O
O
X
60Hz
VESA Standard
O
O
X
1024 x 768
VESA Standard
70Hz
O
X
O
75Hz
VESA Standard
O
O
X
60Hz
O
O
X
1360 x 768
75Hz
O
X
O
720 x 480
60Hz
O
X
O
720 x 576
50Hz
X
O
O
50Hz
O
O
O
1280 x 720
60Hz
O
O
O
50Hz
O
X
O
1920 x 1080i
X
60Hz
O
O
720 x 480i
60Hz
X
X
O
720 x 576i
50Hz
X
X
O
2-2-2.VIDEO
- PAL, PAL-M, PAL-N
- NTSC, NTSC4.43
- SECAM
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