Olevia 237T User manual

TITLE
Service Manual
LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
Page
PagePage
Page
1/72
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Service Manual
LCD TV For 237-T11
Model Number: 237T Model Name:237-T11 FM Number.：
：：
：FM1
FM1FM1
FM1-
--
-037000EGS25
037000EGS25037000EGS25
037000EGS25
Model Number: 237T Model Name:237-T11 FM Number.：
：：
：FM1
FM1FM1
FM1-
--
-037000EGS36
037000EGS36037000EGS36
037000EGS36
Model Number: 237T Model Name:237-T11 FM Number.：
：：
：FM1
FM1FM1
FM1-
--
-03700DEGS46
03700DEGS4603700DEGS46
03700DEGS46
Approval Made by

TITLE
Service Manual
LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
Page 2/72
Company Confidential-DRAFT
Hans Chung
2007/11/19
Jill kao
2007/11/19

TITLE
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LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
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Document change / update record
Update date Version Page Update record
2007/07/03 V1.1
Updated Parts list(LPL WX1-SL01 /LPLWX1-SLA1)
2007/11/19 V1.2
Updated Parts list(LPL WX4-SLA1)

TITLE
Service Manual
LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
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Table of Contents
1. Introduction……………………………………………………………….……………………………….......4
1-1 P r eface……………………………….……………….……………………….…………………………..4
1-2 Caution…………………………………………………..……………………………..………………….4
1-3 Warning………………………………………………………..…………………………….……………4
1-4 Important………………………………………………………..…………………………………………4
2. Specifications…………………………………..……………….……………………………………………5
3. Diagram………….…………….………………………………………………………………….………….6
3-1 Wiring Diagram……………………..……………………………………………….……………………6
3-2 System Block Diagram （ Video ） ………………………………………………………..…………………7
3-3 System Block Diagram （ Audio ） ………………………………………….……………………………….8
4. Trouble shooting flow chart……………………………………………………………..…………………….9
4-1 Abnormal Display…………………………………………………………………………..…………....9
4-2 Abnormal Power On/Off………………………………………………………………………………..10
4 - 3 L E D L i g h t A b n o r m a l D i s p l a y 、 K e y p a d
P r o b l e m … … … … … … … … … … … … … … … … … … … … … . . 1 1
4-4 Image Abnormal Display……………………………………………………………..………………….12
4-5 Audio Abnormal Output…………………………………………………………………..……………..13
4-6 The Other Abnormal Display……………………………………………………….…………………..14
5. Disassembly……………………………………………………………………………………….…………15
5-1 Stand.……………………………………………………….…………………………………………….15
5-2 Back Cover……………………………………………………………………..…………………………15
5-3 System Board………………………………………………………………………..………………….16
5-4 Power Module for LPL-WX1…………………………………………………………………………17
5-5 Power Module for LPL-WX4……………………………………………………………………………18
5-6 Panel Module…………………………………………………………………………………………….19
5-7 Speakers.…………………………………………………………………………….…………………..20
5-8 Keypad Board……………………………………………………………………………………………21
6. Factory Menu.………………………………………………………………………………………………..22
7. Firmware upgrade…………………………………………………………………………………………..23
8. EDID write in and ADC correction and Parameter Adjustment……………………………………..……..29
8-1 EDID write in…………………………………………………………………………………………...29
8-1.1 EDID tools……………………………………………………………………………………………29
8-1.2 EDID write in…………………………………………………………………………………………29
8-2 ADC Correction and Parameter Adjustment……………………………………………………..………30
8-2.1 ADC Correction………………………………………………………………………………………30
8-2.2 Parameter Adjustment.………………………………………………………..………………………31
9. Exploded view………………………………………………………………………………………….…...32
10. Parts List and Photo………………………………………………………………………………………....33
10-1 Parts List For LPL SL01.………………..................................................................................................33
10-2 Parts Photo For LPL SL01..……………………………………………………………………………35
10-3 Parts List For LPL SLA1………………..................................................................................................45
10-4 Parts Photo For LPL SLA1.……………………………………………….…………………………47
10-5 Parts List For LPL WX4..……………….................................................................................................57
10-6 Parts Photo For LPL WX4..…………………………………………………………….………………59
11. Menu wheel…………………………………….……………………………..…………………………...69

TITLE
Service Manual
LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
Page 5/72
Company Confidential-DRAFT

TITLE
Service Manual
LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
Page 6/72
Company Confidential-DRAFT
1. Introduction
1-1 Preface
This service manual describes module-level LCD TV repair for qualified service personnel. This
service manual also includes selected production troubleshooting information for electronic
technicians and engineers.
1-2 Caution
This service manual contains important safeguards and instructions that must be followed for the
safe and proper servicing of this TV.
1-3 Warning
1. Advise customers to follow all operating instructions and safety precautions that have been
furnished with the product.
2. Unplug the ac line cord before cleaning or disassembling the product.
3. Check the ac line cord and plug for wear or damage and replace as necessary.
4. Do not use liquid cleaners or aerosol cleaners to clean the display.
5. Do not place the product on an unstable table or cart. It can cause the product to fall, resulting
in injury and product damage. If a cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
6. Use only replacement parts specified by the manufacturer or replacement parts with the same
performance and safety characteristics. Use of substitute parts with different characteristics can
result in fire or electric shock.
7. Do not hit the LCD panel. In case of breakage, use care when removing broken glass.
8. Keep the product away from heat sources such as radiators, heaters, stoves, and other
heat-generating apparatus.
9. Do not block any ventilation openings.
10. Do not use the product near water; for example, near a bathtub, washbasin, kitchen sink
laundry tub, in a wet basement, or near a swimming pool.
11. If the product uses a grounded-type ac plug and line cord, but the location has a 2-prong
receptacle, advice the customer to contact a qualified electrician to replace the outlet.
1
-4 IMPORTANT INFORMATION FOR TECHNICIAN!
1. After service, press RESET for original factory defaults.
2. Look at the FM Label on the back of the TV to confirm this number is the part list on the
Front cover.
3. There is no identification label for the237-T11.
4. Chip swap front panel (TBD)

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Doc No. SM_237-T11_19Nov07
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2. Specifications
PRODUCT SPECIFICATIONS
LCD Panel 37" TFT 37" TFT(LPL-WX4)
Power Management
(Standby Mode)
＜
＜＜
＜1W ＜
＜＜
＜1W
Displayable Resolution VGA 1360*768 max. VGA 1366*768 max.
Pixel Pitch 0.200mm * 0.600mm * RGB 0.200mm*0.600mm*RGB
LCD Display Color 8-bit, 16.7M colors 8-bit, 16.7 M colors
Viewing Angle CR>10
R/L 178 (Typ.)
U/D 178(Typ.)
CR>10
R/L 178 (Typ.)
U/D 178(Typ.)
Contrast Ratio 800:1 (Typ.) 1000:1 (Typ.)
Response Time 9ms (Gray to Gray) 9ms (Typ.)
Active Display Area H: 819.6mm, V:460.8mm H: 819.6mm, V:460.8mm
RF Tuner ATSC/NTSC Hybrid Terrestrial
Video Module
Input level: ~107dBµV
Range: NTSC 55 to 804 MHz,
2-69 channels for Off-Air and
2-125 channels for CATV
ATSC/NTSC Hybrid
Terrestrial Video Module
Input level: ~107dBµV
Range: NTSC 55 to 804 MHz,
2-69 channels for Off-Air and
2-125 channels for CATV
Power Voltage: 100~240 V
Consumption: 190W
Voltage: 100~240 V/
AC/50~60Hz
Consumption: 190W
2.5A(MAX)
Speaker 15W 15W
Compliance FCC, cUL, CSA, Energy Star FCC, cUL, CSA, Energy Star
Temperature Operating: 0℃
℃℃
℃~40℃
℃℃
℃
Storage: -10℃
℃℃
℃~60℃
℃℃
℃
Operating: 0℃
℃℃
℃~40℃
℃℃
℃
Storage: -10℃
℃℃
℃~60℃
℃℃
℃
Weight w/o stand 50.72lbs 50.72lbs
Weight w/ stand 52.9lbs 52.9lbs
Gross Weight 62.84lbs 62.84lbs
Dimensions (WxHxD) 36.73 inches x 29.33 inches x
10.24 inches
36.73 inches x 29.33 inches x
10.24 inches
Carton Dimensions
(WxHxD)
41.34 inches x 32 inches x 12
inches
41.34 inches x 32 inches x 12
inches

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Version 1.2
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Doc No. SM_237-T11_19Nov07
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3. Diagram
3-1 Wiring Diagram

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Doc No. SM_237-T11_19Nov07
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3-2 System Block Diagram (Video)

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3-3 System Block Diagram (Audio)

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4. Trouble shooting flow chart
4-1 Display Problems
Note: Refer to the Wiring Diagram during troubleshooting for a visual of inter-connections when
indicated by this symbol.
Trouble Condition Check Item Replace Material Test
Display Problems
Abnormal display
1. No video Image
2. Video noise
3. Display flashes
4. Abnomal color
Bright spots
Dark spots
Backlight
uniformity
Light leakage
Spot & Simi
Ghosting
Dust & Scratch
Replace System
board if voltage
is missing.
Step1 ：
1. Check for a loose video
cable connection
2. Check video cable
3. Check source settings
4. Check TV input
1. Reconnect cable
2. Replace cable
3. Change source
settings
4. Change TV input
Test
Finish
Step3 ：
1. Check System board
CN1-pin1 to ground = 5V,
pin3 to ground = 5V or
D4, D64 lighting
2. Check System Board
CN2-pin2 to ground = 12V
Step2 ：
Check for a loose or broken
connection between
Con.J11from system board
to Panel LVDS connection.
Secure connection
or replace the
LVDS wire
Step1:
Check damage to
panel
Replace Panel
Fai
l
ai
Fai
l
OK
OK
Fai
l
Fai
l
Step2:
Check for a loose or
broken connection
between Con.J11from
system board to Panel
LVDS connection.
Fai
l
Replace LVDS
connect wire
OK

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LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
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4-2 Abnormal Power On/Off
Abnormal Power
Off
Shut down
Source can’t
switch
Abnormal Power
On/Off
No Power
Replace System
board
Replace Keypad
board
Fail
Replace Power
supply
Fail
Fail
OK
OK
Test
Finish
Trouble Condition Check Item
Replace Material
Test
Step3
：
Check System Board
CN1 pin1 to ground = 5Vs,
and pin3 to ground = 5V,
Check D4, D64 lighting?
Step2
：
Check Keypad board
CN1-pin1 to ground =
5V or Check D1
lighting?
Step1:
Check Power Supply, Con.
J101–pin 1 to ground = 5V
Con CN1 pin 3 to ground =
5V
Note: Before
proceeding
confirm that
Power cable is
connected and
that proper
voltage is being
fed to TV. (Check
power switch
located next to
power input and
confirm that it’s
ON.)

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Doc No. SM_237-T11_19Nov07
Version 1.2
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4-3 LED is Malfunctioning、
、、
、Keypad Problem
Trouble Condition Check Item
Replace Material
Test
LED is not working
LED is Malfunctioning
Replace System
board if there is no
voltage
Replace board if
there is no voltage
Secure connection
or replace cable
LED flashes Check Power supply
Con.
J101-pin1 to ground =5V
Replace Power
Supply if there is
no voltage
Fail
Fail
Fail
OK
OK
OK
Keypad doesn’t work
Replace Cable
Secure connection
Fail
Test
Finish
Step1
：
Check connector CN 10 on
System board to CN1
located on Keypad board for
a loose connection
Step2
：
Check connector CN 10 on
System board to CN1
located on Keypad board for
a broken cable
Step2
：
Check Keypad board
D1 & CN1-pin 1 to
ground = 5V
Step1
：
Check CN 10 on system
board to CN 1 on
Keypad board for a
loose connection or bad
cable
Step3
：
Check System board
CN10-pin1 to ground
= 5V
Fail
Fail
Note: Before
proceeding
confirm that Power
cable is connected
and that proper
voltage is being
fed to TV. (Check
power switch
located next to
power input and
confirm that it’s
ON.)
Step 3
：
Replace Keypad Board
OK
Step 4
：
Replace System Board
Fail

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Version 1.2
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Doc No. SM_237-T11_19Nov07
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4-4 Image Abnormal Display
No picture through
component
Replace System
board
OK
1. Reconnect cable
2. Replace cable
3. Change source
settings
4. Change TV input
Fail
Image abnormal display
Fail
No picture through
composite
No picture through
S-Video
No Picture through
Tuner
No picture through
HDMI
No picture through
VGA
Replace System
board
Fail 1. Secure connection
2. Change PC
resolution to
fit the timing table
3. Replace VGA cable
OK
Test
Finish
Trouble Condition Check Item
Replace Material
Test
Step1
：
1. Check if VGA cable
is loose.
2. Make sure the PC is
set to a resolution the
TV supports
3. Check both ends of
VGA cable for broken
or loose pins.
Step2
：
Check component J4 on
system board for a short
& component U26 that
stores EDID information
for a short.
Step2
：
1. Check System Board
component L52, L49 L53, L50,
L54, L51 for a short.
2. Check System Board
component L65, L68 for a short
3. Check System Board
component L59, L61 L62, L60
for a short
4. Check System Board
component U103 for a short
5. Check CN9 broken? , D41
lighting? & U60 EDID OK?
Step1 ：
1. Check video cable
connection
2. Check video cable
3. Check source settings
4. Check TV input
Fail
Note: Before
proceeding
confirm that Power
cable is connected
and that proper
voltage is being
fed to TV. (Check
power switch
located next to
power input and
confirm that it’s
ON.)
Note: Before proceeding make
sure the PC is not in standby or
hibernation mode. Make sure
the video card is secure and not
loose (AGP or PCI slot).

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Doc No. SM_237-T11_19Nov07
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4-5 Audio Abnormal Output
Audio Problems Can’t adjustment
Volume Replace Keypad
board
Replace speaker
module
No audio on one
side of speaker
Fail
OK
Replace connect
wire
Fail
Replace System
board
Fail
No audio
Check switches on the
keypad board
OK
Set the speaker
setting to off
Fail
OK
1. Secure earphone
connection.
2. Replace Earphone
cable
Replace System
board
OK
Fail
Fail
No audio through
earphone
Test
Trouble Condition Check Item
Replace Material
Test
Step2
：
Check OSD speaker
setting is off and not
on
Step1 ：
1. Check earphone
connection
2. Check earphone
cable
Step3
：
Check System board
component J21 & Q12
for a short
Step1
：
Check for loose
connection between
CN3 and peaker and
CN4 and speaker
Step2 ：
Check if the Speaker
module is broken
Step3 ：
Check System board
CN2-pin1 to ground =
2V
Fail
Make su
re external audio
connection is secure
before proceeding with
troubleshooting
Finish

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Doc No. SM_237-T11_19Nov07
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4-6 The Other Abnormal Display
Sometimes picture
flashes
Replace System
board
Fail
NO
Replace Keypad/IR
board
Firmware update
fails
Fail
OK
Replace connect
wire
Fail
Replace Remote
control & Battery
Fail
Remote control
fails
Replace LVDS
connect wire
Fail
Replace System
board
Fail
OK
Update firmware
setting process
Fail
Other display problems
Test
Finish
Trouble Condition Check Item
Replace Material
Test
Step1
：
Check firmware
settings
Check connector CN
10 on System board to
CN1 located on
Keypad board for a
loose connection
Step3 ：
Check for a broken
Keypad/IR board
Step2
：
Check System board
component U7,
FB141, FB4 for a short
& Tp103 to Ground =
12V
Step1
：
Check Con. J11 to
panel LVDS
onnection
Step1 ：
Check Remote
control & Battery
OK
OK
Step2
：
Check System board,
J1, P1 Connector or
U110, U5 switch IC
for a short

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Version 1.2
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5. Disassembly
5-1 Stand
5-2 Back Cover
1. Loosen and remove 8 screws.
2. Safely remove the Stand.
1. Loosen and remove 17 screws.
2. Safely remove the Back Cover.
Screw T4*45-PH-Cross-Black
Screw T4*25-PH-Cross-Black
Screw MT4x8-PH-Cross-Black
SCREW T4 X 12

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5-3 System Board
1. Loosen and remove 24 screws
2. Take off the WALLMOUNT Module
Screw MT4x8
-
PH
-
Cross
-
Black
Screw M4x8
-
PH
-
CETW
-
NI
Screw
T3*
8
MT3*6-PH-CROSS-Black