13 Exploded View and Replacement Parts List -----------53
13.1. Exploded View and Mechanical Replacement
Parts List --------------------------------------------------- 53
13.2. Electrical Replacement Parts List -------------------- 53
13.2.1. Replacement Parts List Notes ------------------- 53
13.2.2. Electrical Replacement Parts List ---------------54
2
TH-L32C22T
1Safety Precautions
1.1.General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
4. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.
5. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the
wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.
6. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight
out.
1.1.1.Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the
two prongs on the plug.
2. Measure the resistance value, with an ohmmeter,
between the jumpered AC plug and each exposed
metallic cabinet part on the equipment such as
screwheads, connectors, control shafts, etc. When the
exposed metallic part has a return path to the chassis, the
reading should be 100 Mohm and over.
When the exposed metal does not have a return path to
the chassis, the reading must be .
1.1.2.Leakage Current Hot Check (See
Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use
an isolation transformer for this check.
2. Connect a 1.5kohm, 10 watts resistor, in parallel with a
0.15μF capacitors, between each exposed metallic part
on the set and a good earth ground such as a water pipe,
as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of
the above measurements.
6. The potential at any point should not exceed 0.75 volts
RMS. A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current must not exceed 1/2 milliamp. In case a
measurement is outside of the limits specified, there is a
possibility of a shock hazard, and the equipment should
be repaired and rechecked before it is returned to the
customer.
Figure 1
3
TH-L32C22T
2Warning
2.1.Prevention of Electrostatic Discharge (ESD) to Electrostatically
Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor [chip] components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or
comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)
sufficient to damage an ES device).
4
TH-L32C22T
2.2.About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d
suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB.
Caution
• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please
use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).
• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb
solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the
opposite side. (see figure below)
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder.
However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.
5
TH-L32C22T
3Service Navigation
3.1.Service Hint
1. Remove the Back Cover.
2. Remove the A Board / P Board by pulling out.
6
3.2.Service Hint (TH-L32C22TY)
1. Remove the Back Cover.
2. Remove the A Board / IP Board by pulling out.
TH-L32C22T
7
TH-L32C22T
4Specifications
Power SourceAC Single 220-240 V, 50 / 60 Hz
Power Consumption
Average use78 W
Standby Condition0.6 W
Display panel
Aspect Ratio16:9
Visible screen size80 cm (diagonal)
698 mm (W) × 393 mm (H)
Number of pixels1,049,088 (1,366 (W) × 768 (H))
Sound
Speaker160 mm × 40 mm × 2 pcs, 8 Ω
Audio Output30 W (15 W + 15 W), 10% THD
PC signalsVGA, SVGA, WVGA, XGA
SXGA, WXGA ...... (compressed)
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Receiving Systems / Band name17 SYSTEMSFUNCTIONS
1 PAL B, G, H
2 PAL I
3 PAL D, K
4 SECAM B, G
5 SECAM D, K
6 SECAM K1
7 NTSC M (NTSC 3.58 / 4.5MHz)
8 NTSC 4.43 / 5.5 MHz
9 NTSC 4.43 / 6.0 MHz
10 NTSC 4.43 / 6.5 MHz
11 NTSC 3.58 / 5.5 MHz
12 NTSC 3.58 / 6.0 MHz
13 NTSC 3.58 / 6.5 MHz
14 SECAM I
15 PAL 60 Hz / 5.5 MHzPlayback from Special Disc Players and
16 PAL 60 Hz / 6.0 MHz
17 PAL 60 Hz / 6.5 MHz
Receiving Channels (Regular TV)
PAL B/ G2 - 12 (PAL / SECAM B, K1)
0 - 12 (PAL B AUST.)
1 - 9 (PAL B N.Z.)
1 - 12 (PAL / SECAM D)
1 - 12 (NTSC M JAPAN)
2 - 13 (NTSC M USA)
UHF BAND21 - 69 (PAL G, H, I / SECAM G, K, K1)
28 - 69 (PAL B AUST.)
13 - 57 (PAL D, K)
13 - 62 (NTSC M JAPAN)
14 - 69 (NTSC M USA)
VIDEORCA PIN Type × 11.0 V [p-p] (75 Ω)
COMPONENTY1.0 V [p-p] (including synchronization)
AV2 InputAUDIO L-RRCA PIN Type × 20.5 V [rms]
VIDEORCA PIN Type × 11.0 V [p-p] (75 Ω)
Audio OutputAUDIO L-RRCA PIN Type × 20.5 V [rms] (high impedance)
RCA PIN Type × 20.5 V [rms]
, PR/C
P
B/CB
R
Reception of broadcast transmission and
playback from video cassette tape recorders.
Playback from special VCR’s or DVD.
Special VCR’s or DVD.
± 0.35 V [p-p]
8
OthersHDMI InputTYPE A Connectors• This TV supports ‘HDAVI Control 5’ function.
PC InputHIGH-DENSITY D-SUB 15 PINR, G, B / 0.7 V[p-p] (75 Ω)
HD, VD / TTL LEVEL 2.0-5.0 V [p-p] (high impedance)
Dimension (W x H x D)920 mm × 556.5 mm × 204 mm (With Pedestal)
920 mm × 525 mm × 149 mm (TV only)
Mass10.0 kg Net (With Pedestal)
9.5 kg Net (TV only)
Note
Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.
TH-L32C22T
9
TH-L32C22T
5Service Mode
5.1.How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
5.1.1.Contents of adjustment mode
• Value is shown as a hexadecimal number.
• Preset value differs depending on models.
• After entering the adjustment mode, take note of the value in each item before starting adjustment.
Main itemSub itemSample DataRemark
ADJUSTCONTRAST000
COLOR4C
TINT00
SUB-BRT808
BACKLGT22E
B-Y-G34
R-Y-A00
WB-ADJR-GAINF7
G-GAINFB
B-GAINDB
R-CENT82
G-CENT80
B-CENT86
OPTIONBootROMFactory Preset.
STBY-SET00
EMERGENCYON
CLK MODE00
CLOCK0E4
RM-SET00Fixed.
SRV-TOOL00See next.
5.1.2.How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
10
TH-L32C22T
5.2.SRV-TOOL
5.2.1.How to access
1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote control.
5.2.2.Display of SOS History
SOS History (Number of LED blinking ) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory
shipment setting].
5.2.3.POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-checks or any other command.
5.2.4.Exit
1. Disconnect the AC cord from wall outlet.
11
TH-L32C22T
5.3.Service Mode Adjustment
1. Press the ‘RECALL’ button on the remote control and press ‘-’ vol button on the LCD panel.
2. Press button number 1 on the remote control to select for Adjustment.
3. Self Check to Exit.
5.3.1.Self Check Mode
1. Press the ‘MENU’ button (on the remote control) and the ‘DOWN’ button on the LCD panel.
2. Press ON/OFF button on the panel to Exit.
5.3.2.Hotel Mode Adjustment
1. Press the ‘VOLUME DOWN’ button on the TV panel and simultaneously press the AV button on the remote control 3 times to
enter Hotel Mode.
2. Set Hotel mode ‘on’, then press ‘EXIT’ to come out.
5.3.3.Hotel Mode
1. Purpose
Restrict a function for hotels.
2. Access command to the Hotel mode setup menu.
In order to display the Hotel mode setup menu, please
enter the following command (within 2 second).
[TV] : Hold Vol [Down] + [Remote] : Press AV button 3
times.
Then, the Hotel mode setup menu is displayed.
ItemFunctions
Hotel ModeValid/invalid of Hotel Mode function is set. Off ←→
On
Initial INPUTOff ←→ Analogue TV ←→ Digital TV ←→ AV1
←→ AV2 ←→ AV3 ←→ PC ←→ HDMI 1 ←→
HDMI 2 ←→ HDMI 3
Adjust the input signal when the unit is turned on.
Initial POSSelect channel position when the unit is turned on.
When ‘Initial INPUT’ is set to RF (TV/Analogue/
Digital). In other settings of ‘Initial INPUT’ it is not
possible to select it.
Initial VOL levelPress Volume button to adjust the volume when
Maximum VOL
level
Button lockSelect Panel key lock setting Off ←→ SETUP ←→
Remote lockSelect Remote key lock setting Off ←→ SETUP
Welcome Image See another documents
the unit is turned on.
Off ←→ On
Off: Sets normal volume.
On: Sets your preferred volume.
• When ‘Maximum VOL level’ is ‘On’, the volume
can only be adjusted between 0 and your
maximum range.
Press Volume button to adjust the maximum
volume.
Off ←→ On
Off: Sets auto maximum volume.
On: Sets your preferred maximum volume.
• If the ‘Maximum VOL level’ is set lower than the
‘Initial VOL level’, the ‘Initial VOL level’
automatically becomes the same as the
“Maximum VOL level”
MENU ←→ All
Off: no key is locked SETUP.
←→ MENU.
Off: no key is locked
SETUP: only ‘SETUP’ menu is invalid.
MENU: ‘Main Menu’ is invalid
12
TH-L32C22T
6Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
6.1.Check of the IIC bus lines
6.1.1.How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote
control for more than 3 seconds.
6.1.2.Exit
Disconnect the AC cord from wall outlet.
6.1.3.Screen display
6.1.4.Check Point
Confirm the following parts if NG was displayed.
13
TH-L32C22T
6.2.Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the
defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit as follow:
Blinking timesContentsBOARD
1Inverter_SOSIP BOARD
2SUB 1.8V_SOSA BOARD
3SUB 1.2V_SOSA BOARD
4POWER_SOSIP/A BOARD
5SUB 5V_SOSA BOARD
9TCON_SOSA BOARD
10SUB 3.3V_SENSEA BOARD
11DCDC_SOSA BOARD
12SOSA BOARD
6.3.No Power
First check point
There are following 2 states of No Power indication by power LED.
1. No lit
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
14
7Disassembly and Assembly Instructions
7.1.AC Cord Dressing
DRESSING AC CORD.
TH-L32C22T
15
TH-L32C22T
7.2.Backcover Screw and Long Metal Frame
1. After fix I-CELL to CABINET COMPLETE ASSY, fix them by screw.
2. Before that, make sure LVDS wire, sp. Wire and lamp wire (L & R) not hit between I-CELL and CABINET COMPLETE ASSY.
16
7.3.Speaker Assembly Fixing
Fix SPEAKER together RUBBER BUSH to cabinet.
TH-L32C22T
17
TH-L32C22T
7.4.Speaker Assembly & Small Part Installation
Fix LED PANEL and CONTROL BUTTON to CABINET with screw.
18
7.5.Dressing Sp. Wire to Cabinet Ribs
Sp wire dressing must slot-in at location No 1 ~ No 20
TH-L32C22T
19
TH-L32C22T
7.6.Pedestal Assembly 1
1. Fix the STAND MTG SPACER at bottom PEDESTAL COVER with screw.
2. Stick the RUBBER FOOT at bottom PEDESTAL COVER.
20
7.7.Pedestal Assembly 2
TH-L32C22T
21
TH-L32C22T
8Measurements and Adjustments
8.1.Voltage chart of A-board
Check voltage as follows at Reception state
VOLTAGETEST POINTSPECIFICATION
(Reception state)
STB3.3VTP47263.3 ± 0.16 V
SUB5VTP47255 ± 0.25 V
SOUND15VTP276522 ± 1 V
STB5VTP47236.1 ± 0.3 V
SUB6VTP27676.1 ± 0.3 V
TCON13.7VTP701912.5 ± 2 V
TCON2.5VTP48262.5 ± 0.12 V
TCON31VTP701331 ± 3.1 V
TCON-6VTP7014-5.7 ± 0.6 V
8.2.Voltage chart of P-board
Set P-Board to a dummy set and check the satisfaction with the specified voltage as following table.
Power Supply NameMeasurement PointNormal condition (V)Stby condition (V)
21VTP80222 ± 1 VNO CARE
STBY_6VTP8236.1 ± 0.3 VNO CARE
DTV12VTP82112.2 ± 0.6 VNO CARE
AUDIO_VCCTP82022 ± 1 VNO CARE
8.3.Voltage chart of IP-board - TH-L32C22TY
Set IP-Board to a dummy set and check the satisfaction with the specified voltage as following table.
Power Supply NameMeasurement PointNormal condition (V)Stby condition (V)
21VTP720122 ± 1 VNO CARE
STBY_6VTP72116.1 ± 0.3 VNO CARE
DTV12VTP720912.2 ± 0.6 VNO CARE
AUDIO_VCCTP720822 ± 1 VNO CARE
22
8.4.Picture level adjustment (RF)
Instrument NameRemarks
Adjustment or Inspection Procedure
Procedure
1. Receive the sprit color bar pattern E-2 (including 100% white)
Adjustment
1. ‘ADJUST’ - ‘CONTRAST’
Enter the Factory adjustment mode, and go to ‘ADJUST’ - ‘CONTRAST’ to adjust the Picture Level.
Press yellow key for Auto Adj.
Note
Each system, there is the case that preestablishment needs by an act as follows.
TH-L32C22T
23
TH-L32C22T
SP_R
Debug
Serial
CI/SD card
IIC3
IIC2
IIC0
HDMI 1
SP_L
GenX
RST
CVBS/YUV
Audio Out L,R
S3.3/
1.8/
1.2V
STB5V
Audio AMP
TAS5709[36]
AV terminal (Rear)
RMT/KEY
25M
S5
SBO0
SBI0
SDCLK,
SDCMD
SDDAT[0 - 3]
SDCD, SDWP
RGB/HS/VS (PC)
RF Analog
RF Analog
RST
SD-IF
S1.8V
FE
AVSW
CLKGEN
SIF
MCU
TMDS
SW
USB IF
I
/S
D
ca
r
d
D
I
F
SB IF
Seine4LV
EEPROM
128kbit
SLV[A0]
MCU_IIC
EEPROM
16kbit
SLV[A0]
MCU_IIC(Multi Master)
Factory /
Service
IIC1
DDR2
800M/512Mb
/x16
Sound 21V
PANEL
mini- LVDS
HD 1pair
PWM
CNTROL
CIRCUIT
PWM_POW_ON
PWMA, PWMK
PANEL
POWER
PANEL_VCC_ON
INVERTER
INV_ON
INV_SOS
LPL
LPR
POLL
POLR
CPV
GDATA1
GDATA2
LD
GAMMMA
DAC[E8]
4KEEP
[A0]
T- CON
DCDC[80]
AVDD_EN
VDD25_EN
LCD
Model
RCA Composite Video (AV1)
RCA Component Video (AV1)
PC Input
Audio Out L,R
RCA Composite Video (AV2)
STB3.3V
S3.3V
LCD_EEP_WP
STB3.3V
STB1.2V
STB3.3V
NOR
128Mb
CS0
Nile -TCON
E-Bus
Ether
For
develop
CS1
Tuner
ENG39F03GF [C6]
24KEc_EEP_WP
MCU_EEP_WP
SCL:50K
9Block Diagram
9.1.Main Block Diagram
24
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