Toshiba 32L310U20 User manual

1
32L310U20 Service manual
Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this LCD Television.
Be sure to read cautionary items described in the manual before servicing.
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric
shock, do not perform any servicing other than that described in the operating instructions unless you are
qualified to do so.
1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter
carefully and with caution in order not to receive injury.
2. Replacement work should be started after the Panel Module and the AC/DC Power supply have become
sufficiently cool.
3. Special care should be taken when working near the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands in order to protect its surface from blemishes
and damage.
5. It is recommended that you use clean soft gloves during the replacement work in order to protect not only
the display area of the Panel Module but also yourself.
1. Features .......................................................... 4
2. Specifications .................................................. 5
3. Component names .......................................... 11
4. Service points ............................................... 13
5. Adjustment .................................................... 14
6. Troubleshooting ............................................ 39
7. Attachments……………………………………48
8.Exploded view………………………………….48
LCD Television
Caution
Contents
Service Warning

2
Revison History:
Rev. Date Changed Content Name Note

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CAUTION FOR SAFETY
Please read this page before repair the monitor.
The following safety precautions are designed to help you stay safe and prevent accidents during the repair
work.
 Please take note of these cautionary flags.
Warning This means "Potential to sustain injury or even death."
Caution This means "Potential to sustain breakage or irreparable damage."
 Also note these cautionary icons
This means "CAUTION" This means "MUST"
This means "POTENTIAL ELECTRIC
SHOCK"
This means "DO NOT"
WARNING
 Follow instructions.  Must use same types of wires and components.
The cabinet, chassis, and labels are parts
that require attention. You must follow the
caution notes and safety instructions
presented throughout this User Manual to
prevent damage to them or injury to
yourself.
The Monitor uses special tubes and tapes
made from insulated materials. Moreover,
some materials are kept from making
contact with the PWB for the sake of
safety.Internal leads are kept from hot
parts or high voltage parts by means of
clamps or other measures. As such, you
must restored these parts to their original
conditions in order to prevent electric
shock or fire.
 Prevent electric shock.
Exercise caution while working on the
device as the Monitor contains high
voltage parts and power supply.It is
possible to sustain severe injury or death
if you accidentally touch the wrong
parts.You must disconnect the power
supply while servicing, reassembling, or
change parts. If you touch a live
connection it is possible to sustain severe
injury or death.
 Perform safety check when done.
Every part (such as removed screws,
components, and wiring) must be restored
to their prior conditions after servicing.Be
sure to check everything that was repaired
for damage or mistakes. Also measure the
insulated impedance with a meg-ohm
meter to confirm that the impedance value
is more than 4M ohm.If the impedance
value is less than 4M ohm, then electric
shock or fire may result.
 Use recommended components.
Use only the
recommended
components or componentst that
structurally identical to the originals. This
is to ensure safety and reliability. Pay
special attention to parts in the parts list
and circuit diagrams marked with . If you
use non-recommended components, then
electric shock or fire may result.
 Do not try to check the HDCP code and
combination circuit.
Never remove the shield case protecting
the HDCP code and combination circuit.

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PRECAUTIONS
 Cleaning the LCD panel of the television
Please make sure to unplug the power cord before cleaning the television.
● Wipe the panel with a lint-free and dry cloth in order to prevent damage to the panel surface.
● Do not use a chemical cloth or cleaner. Depending on the ingredients, it may cause discoloration and
damage the panel surface.
● Do not wipe with a hard cloth or rub hard. It may hurt the panel surface.
● In case of the greasy dirt such as fingerprint, wipe with a lint-free cloth moistened by a diluted neutral
detergent solution, and then wipe with a soft and dry cloth.
● Do not use a spray cleaner. It could cause malfunction.
 Cleaning the monitor's cabinet of the television
● The following may cause crack, deformation, and paint peeling.
● Do not wipe the cabinet with benzene, thinner, and other chemical products.
● Do not spray volatile solutions such as insecticide over the cabinet.
● Do not leave the cabinet in prolonged contact with plastic or rubber materials.
● Do not use a chemical cloth, cleaner or wax. Depending on the ingredients, it may cause crack and
deformation.
● Use a lint-free cloth to clean the cabinet and control panel of the television. In case of the heavy dirt,
wipe with a soft cloth moistened by a diluted neutral detergent solution, and then wipe with a soft and
dry cloth.
● Never use the following detergents. It could cause crack, discoloration, and scratch.
● Acid/ alkaline detergent, alcoholic detergent, abrasive cleaner, powder soap, OA cleaner, car wax, glass
cleaner, etc.
1. Features
● Large-screen and high-definition LCD panel.
● Improved Digital signal processor.
● Accept more digital input devices with HDMI terminals.
● Great diversity of connecting terminals to cover wide range of audio-visual equipments.
● Enjoy the image from PC with large, high-definition LCD screen.
● Easy-to-use On-Screen Display system operating with Remote control.
● Low power consumption.
● Digital Terrestrial Television Broadcasting
Converting into digital signal enables to provide more channels and various useful features, such as, Digital
& Analog Closed caption , V-chip and so on. Further, digital signal can create high quality picture.

MODEL NAME 32" HD
TOSHIBA NAME 32L220U20
1 Biz. Term
-1 Delivery Term FOB China
-2 Shipping Style FG
-3 Currency USA/Canada/Mexico
-4
Category
IP requirement ATSC IP Essential
MP target Apr', 2019
2 Shape and stuff
-1 Dimension(W x H x
D)(mm) with stand 7373X48.1X20.2 CM
without stand 73X43.9X8.5 CM
-2 Weight (without stand)
(Kg) without stand 3.8 KG
Weight (with stand)
(Kg) Net weight 3.9 KG
Gross weight 5.5.3 KG
-3 Container loading 20F 504 SETS
40F 1032 SETS
40F HQ 1260 SETS
-4 Bezel Treatment Glossy
Color BLACK
2. Models Specification
5

Plastic ABS 94HB
-5 Stand base Plastic ABS 94HB
-6 Back cover Plastic
TOP:HIPS 94V-0 ,Bottom:HIPS
9HB75
-7 Number of control keys 1
-8 LED Indicator Red/Green Red
-9 Wall mount (Vesa
Dimensions) 100 x 100(mm)
-10
Vesa Screw Size
(32"and below:M4;
Above 32": M6; If M4X12 (MM)
100lbs or more M8 (no
M5))
3 Panel
candidate should
provide completed
panel spec.
-1 Dimension / Power
Consumptions (LCM Spec) 32"
-2 Pixel Format (H x V) 1366 x 768
-3 BM Supplyer KTC
-4 BM Part number TBD
-5 Cell Supplier CSOT
Cell Part number ST3151A05-8 V2.8
-6 Backlight Type CCFL / E-LED /D-LED D-LED
-7 Feature 60Hz/120Hz 60Hz
Color Gamut 59%(min.)/62%(typ.)
8bit / 10bit 8bit
LED Backlight yes
Local Dimming ---
-8 Visible Area (mm) : H x
V697.685x392.256
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-9 Diagonal Screen Size
(inches) 31.5"
-10 Pixel Pitch (mm) 0.17025x0.51075
-11
Brightness (cd/㎡)
(min/typ)Brightness
(cd/㎡)
(min/typ)Brightness
(cd/㎡)
(min/typ)Brightness
(cd/㎡) (min/typ)
should be measured
under color
temperature
x=280,y=288(natural)
and reach brightness
spec.
180/220
Color chromaticity White x,y Wx:0.280, Wy:0.290
-12 Contrast Ratio
(min/typ) 2400(min.)/3000(typ.)
-13 Viewing angle Conventional (CR>10)
(degrees) 89+89
-14 Response Time (ms)
(typ) . 6.5ms(typ.)/12ms(max.)
-15 Back Light Life (hours) 30000 hrs
-16 Panel quality level Bright/dark dot ZBD
mura level 2% ND filter
4 Terminals
-1 Input
Terminal direction
("Bottom and side" or
"back and side")
side
Antenna Input 1 (Side)
VIDEO/AUDIO Input
Port CVBS,L/R 1 (Side)
HDMI with MHL ---
HDMI 2 (2 side)
HDMI(DVI) / analog
Audio input(3.5mm) yes/---
-2 Output Audio Line out (Fixed /
Variable) yes / ---
Headphone out
(Fixed / Variable) --- / yes
Digital 1 (SPDIF optical)(Side)
7

LAN (10/100Mbps) ---
USB (Total
QTY)/USB-IF approve
part(should provide
TID number)
1( USB ID number is 60001218)
-3 Control RS-232C ---
-4 Service Port Program update USB
5 Receiving Signals
-1 Built-in Tuners Composition Digital & Analog (1)
ATSC 8VSB
CABLE 64/256QAM (135ch)
Analog NTSC-M
System / Number of
Position FS/191ch
-2 Antenna Input Digital ATSC,
Cable(64/256QAM/135ch,8VSB)
NTSC yes
Setting of Factory
Release NTSC
-3
Video Compression
(Tuner)Video
Compression
(Tuner)
MPEG-2 SD (MP@ML) yes
HD (MP@HL) yes
-4
Audio Decoder
(Tuner)Audio Decoder
(Tuner)
MPEG-1 Layer Ⅰ/Ⅱyes /yes
MPEG-2 Layer Ⅰ/Ⅱno /yes
Dolby Digital yes
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HE-AAC Layer I
Version II/IV (For Mexico)
HE-AAC Layer II
Version II/IV (For Mexico)
-5
Audio
Encored/Transcorder
(output)
Dolby Digital yes
NTSC yes
-6 Composite Video 480i (60Hz) yes
-7 HDMI AV format 480i (60Hz) / 576i
(50Hz) yes / ---
480p (60Hz) / 576p
(50Hz) yes / ---
720p
(24/30/50/60Hz) --- / --- / --- / yes
1080i (60Hz) /
1080i (50Hz) yes / ---
1080p
(24/25/30/50/60Hz) yes / --- / yes / --- / yes
3840x2160 4:2:0
60p ---
3840x2160 4:4:4
30/25/24p ---
3840x2160 4:2:2
30/25/24p ---
3840x2160 4:4:4
60p ---
4096x2160 4:2:0
60p ---
4096x2160 4:4:4
30/25/24p ---
4096x2160 4:2:2
30/25/24p ---
PC format VGA (640 x 480) 60Hz
SVGA (800 x 600) 60Hz
XGA (1024 x 768) 60Hz
9

WXGA (1280x768) 60Hz
WXGA (1360x768) 60Hz
SXGA (1280 x 1024) 60Hz
Audio format L-PCM / AC3 yes / yes
Ver 1.4 ARC (Audio Return
Channel) Yes (HDMI-1 only)
CEC CEC yes
CEC unified 0.9 yes
HDMI CEC Player
Control Root Menu
Contents Menu yes
Setup Menu yes
Top Menu yes
Menu yes
Information of
connected device yes
10

3. Components name
11
8

12

13
 Lead-free solder
This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions
before attempting any soldering work.
Caution: Always wear safety glasses to prevent fumes or molten solder from getting into
the eyes. Lead-free solder can splatter at high temperatures (600℃).
 Lead-free solder indicator
Printed circuit boards using lead-free solder are engraved with an "F."
 Properties of lead-free solder
The melting point of lead-free solder is 40-50℃ higher than leaded solder.
 Servicing solder
Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended. Although servicing with
leaded solder is possible, there are a few precautions that have to be taken. (Not taking these precautions may
cause the solder to not harden properly, and lead to consequent malfunctions.)
Precautions when using leaded solder
 Remove all lead-free solder from soldered joints when replacing components.
 If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the
lead-free solder has been completely melted (do not apply the soldering iron without solder).
 Servicing soldering iron
A soldering iron with a temperature setting capability (temperature control function) is recommended.
The melting point of lead-free solder is higher than leaded solder. Use a soldering iron that maintains a high
stable temperature (large heat capacity), and that allows temperature adjustment according to the part being
serviced, to avoid poor servicing performance.
Recommended soldering iron:
 Soldering iron with temperature control function (temperature range: 320-450℃)
Recommended temperature range per part:
Part Soldering iron temperature
Mounting (chips) on mounted PCB 320ºC±30ºC
Mounting (chips) on empty PCB 380ºC±30ºC
Chassis, metallic shield, etc. 420ºC±30ºC
(1) IR PWB, KEY PWB, SIDE I/O PWB, T PWB
(2) FORMATTER PWB
(3) POWER BOARD
The PWB assembly which has used lead free solder
4.Service Points

5. Adjustments
5.1 FACTORY MAIN MENU
0）Hotkey enable setting
1）System initialization, for the Machine factory
reset
2）Loop the test screen
3）ADC Autocolor (Detail -> 2)
4）Setting about picture（Detail -> 3）
5）Setting about sound（Detail -> 4）
6）General setting（Detail -> 5）
7）For Debugging（Detail -> 6）
8）Setting about Panel（Detail -> 7）
9）EMC Certification parameter（Detail -> 8）
10）System parameter（Detail -> 9）
11）INIT, All parameters return to the initial state
12）software upgrade（Detail -> 10）
13）Initialize the factory channel table
Bin Name:the name of current bin name
Soft Version:the version of the current soft
Factory Version：TCL factory version name
Main board:the type of the main board
Checksum:the checksum
Build Time:the time of building
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5.2 ADC ADJUST
ADC Autocolor Adjust
ADC Autocolor Adjust,Corrects the conversion
error due to ADC discretisation and board
component discretization.Divided into YPbPr VGA
SCART-RGB.Adjustments are included R Gain,G
Gain,B Gain,R Offset,G Offset,B Offset.
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5.3 PICTURE SETTING
0）Source selection
1）The mode of picture（Detail -> 3.1）
2）Picture Curve settings（Detail -> 2.2）
3）WB Adjust settings（Detail -> 2.3）
4）Overscan settings
5）PQ adjust settings
6）Gamma selection
7）DLC selection
8）HDMI RGB Range setting
9）Film mode settings（Film、Film22、Film32、
Film Any）
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5.3.1 PICTURE MODE
0）Source selection
1）Picture mode selection
2）Contrast adjust
3）Brightnesst adjust
4）Colour adjust
5）Sharpness adjust
6）Tint adjust
7）WB mode selection
8）WB R gain adjust
9）WB G gain adjust
10）WB B gain adjust
11）WB reset item
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5.3.2 PICTURE CURVE
0）Source selection
1）Contrast adjust
2）Brightnesst adjust
3）Colour adjust
4）Sharpness adjust
5）Tint adjust
See detail 3.2.1
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5.3.2.1Contrast
1）the value what contrast is 0
2）the value what contrast is 25
3）the value what contrast is 50
4）the value what contrast is 75
5）the value what contrast is 100
Other Options are the same as it
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5.3.3 WB ADJUST
WB ADJUST
Current channel white balance adjustment.Divided
into Warm Cool Normal,And the channel is
saved.Adjustments are included R Gain G Gain B
Gain R Offset G Offset B Offset SYNC ALL
RESET WB.
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