Panasonic TH-L32X10A User manual

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TH-L32X10A
LH88 Chassis
LCD TV
Specifications
Power Source AC 220-240V, 50/60 Hz
Power Consumption Power rating:114W
Normal(Home) mode:91W
Standby condition:0.4W
LCD 80cm
Wide XGA (1366 × 768 pixels) 16:9 aspect ratio LCD panel.
Screen Size 698mm(W) × 393mm(H)
Sound
Speaker 160mm × 42mm× 2pcs,8 Ω
Audio Output 20W(10W+10W)10% THD
Headphones M3 (3.5 mm)stereo mini Jack × 1
PC signals VGA, SVGA, XGA
SXGA ...........(compressed)
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Receiving System/Band name
PAL B/G Reception of Off air broadcasts
DVB-T 7MHz VHF/UHF(Australia)free-to-air TV broadcast reception
PAL 60Hz Playback of NTSC tape from some PAL Video recorders(VCR)
M.NTSC Playback from M.NTSC Video recorders(VCR)
NTSC Playback from NTSC Video recorders(VCR)
Aerial-Rear VHF/UHF
Operating Conditions Temperature : 0°C - 35°C
Humidity : 20 % - 80 % RH (non-condensing)
Connection Terminals
ORDER NO. SMT0902002CE

1 Safety Precautions 4
1.1. General Guidelines 4
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 5
3 About lead free solder (PbF) 6
4 Input signal that can be displayed 7
5 Self-check function 8
5.1. Self-check 8
6 Power LED blinking timing chart 9
7 Chassis Board Layout 10
8 Before servicing 11
8.1. Location of Lead wiring 11
8.2. EMI 1 processing 12
8.3. EMI 2 processing 13
9 Maintenance Disassembly 14
9.1. Remove the back cover 14
9.2. Remove AC cord 14
9.3. Control panel assy 14
9.4. Side AV stand bracket,A-board,P-board 15
9.5. Remove the speaker 16
9.6. V-board and LED panel 16
9.7. LCD screen 16
10 Service Mode 17
10.1. How to enter into Service Mode 17
10.2. SRV-TOOL 18
10.3. Option Description 18
10.4. OPTION Setting 18
11 Hotel Mode Access 19
11.1. Purpose 19
11.2. Access command to the Hotel mode setup menu 19
11.3. To exit the Hotel mode setup menu. 19
11.4. Explain the Hotel mode setup menu. 19
12 Adjustment Method 20
12.1. P-board voltage testing point 20
12.2. A-board voltage testing point 20
13 Conductor Views 21
13.1. P-Board 21
13.2. A-Board 23
13.3. K and V-Board 25
14 Schematic Diagram 27
14.1. Schematic Diagram Notes 27
14.2. P-Board (1/3) Schematic Diagram 28
14.3. P-Board (2/3) Schematic Diagram 29
14.4. P-Board (3/3) Schematic Diagram 30
AV3 VIDEO (RCA Pin Type) 1.0 V[p-p] (75 Ω)
S-VIDEO (MINI DIN 4-pin) Y: 1.0 V[p-p] (75 Ω), C: 0.286 V[p-p] (75 Ω)
AUDIO L-R (RCA Pin Type × 2) 0.5 V[rms]
AV1/AV2 VIDEO (RCA Pin Type) 1.0 V[p-p] (75 Ω)
AUDIO L-R (RCA Pin Type × 2) 0.5 V[rms]
Y1.0 V[p-p] (including synchronization)
PBCB/PRCR±0.35 V[p-p]
Others
HDMI 1-3 Input: TYPE A Connectors (This TV supports "HDAVI Control 4" function.)
PC Input HIGH-DENSITY D-SUB 15PIN R, G, B/0.7 V[p-p] (75Ω)
HD, VD/TTL Level 2.0 - 5.0 V[p-p](high impedance)
AUDIO L-R RCA PIN Type × 2 0.5 V[rms]
DIGITAL AUDIO OUT PCM/Dolby Digital, Fiber optic
Card slot SD CARD slot × 1
Monitor Output VIDEO (RCA PIN Type × 1) 1.0V[p-p](75 Ω)
AUDIO L-R (RCA PIN Type × 2) 0.5V[rms](high impedance)
Dimensions ( W x H x D )
Including TV Stand 798mm × 511mm × 217mm
TV Set Only 798mm × 511mm × 93mm
Weight 13.5 kg Net(With Pedestal)
11.5 kg Net(TV only)
Note:
Design and specifications are subject to change without notice. Weight and Dimensions shown are approximate.
CONTENTS
Page Page
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TH-L32X10A

14.5. A-Board (1/24) Schematic Diagram 31
14.6. A-Board (2/24) Schematic Diagram 32
14.7. A-Board (3/24) Schematic Diagram 33
14.8. A-Board (4/24) Schematic Diagram 34
14.9. A-Board (5/24) Schematic Diagram 35
14.10. A-Board (6/24) Schematic Diagram 36
14.11. A-Board (7/24) Schematic Diagram 37
14.12. A-Board (8/24) Schematic Diagram 38
14.13. A-Board (9/24) Schematic Diagram 39
14.14. A-Board (10/24) Schematic Diagram 40
14.15. A-Board (11/24) Schematic Diagram 41
14.16. A-Board (12/24) Schematic Diagram 42
14.17. A-Board (13/24) Schematic Diagram 43
14.18. A-Board (14/24) Schematic Diagram 44
14.19. A-Board (15/24) Schematic Diagram 45
14.20. A-Board (16/24) Schematic Diagram 46
14.21. A-Board (17/24) Schematic Diagram 47
14.22. A-Board (18/24) Schematic Diagram 48
14.23. A-Board (19/24) Schematic Diagram 49
14.24. A-Board (20/24) Schematic Diagram 50
14.25. A-Board (21/24) Schematic Diagram 51
14.26. A-Board (22/24) Schematic Diagram 52
14.27. A-Board (23/24) Schematic Diagram 53
14.28. A-Board (24/24) Schematic Diagram 54
14.29. K-Board Schematic Diagram 55
14.30. V-Board Schematic Diagram 56
15 Parts Location 57
16 Package exploded view 58
17 Mechanical Replacement Parts List 59
18 Electrical Replacement Parts List 60
18.1. Replacement Parts List Notes 60
18.2. Electrical Replacement Parts List 61
19 SCHEMATIC DIAGRAM FOR PRINTING WITH A4 77
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TH-L32X10A

1 Safety Precautions
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 between
1MΩand 5.2MΩ.
When the exposed metal does not have a return path to the
chassis, the reading must be .
Figure 1
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 1.5kΩ, 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.
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.
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TH-L32X10A

2 Prevention of Electro Static 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 electro static 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, alminum 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 hamless 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).
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TH-L32X10A

3 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 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).
• • •
• 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
Pbsolder. 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.
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TH-L32X10A

4 Input signal that can be displayed
COMPONENT (Y, PB/CB,P
R/CR), HDMI
* Mark: Applicable input signal
Signal name Component HDMI
525(480)/60i * *
525(480)/60p * *
625(576)/50i * *
625(576)/50p * *
750(720)/60p * *
750(720)/50p * *
1,125(1,080)/60i * *
1,125(1,080)/50i * *
1,125(1,080)/60p *
1,125(1,080)/50p *
1,125(1,080)/24p *
PC (D-sub 15P)
Signal name Horizontal frequency(kHz) Vertical frequency(Hz)
640 × 400 @ 70 Hz 31.47 70.07
640 × 480 @ 60 Hz 31.47 59.94
640 × 480 @ 75 Hz 37.50 75.00
800 × 600 @ 60 Hz 37.88 60.32
800 × 600 @ 75 Hz 46.88 75.00
800 × 600 @ 85 Hz 53.67 85.06
852 × 480 @ 60 Hz 31.44 59.89
1,024 × 768 @ 60 Hz 48.36 60.00
1,024 × 768 @ 70 Hz 56.48 70.07
1,024 × 768 @ 75 Hz 60.02 75.03
1,024 × 768 @ 85 Hz 68.68 85.00
1,280 × 1,024 @ 60 Hz 63.98 60.02
1,280 × 768 @ 60 Hz 47.70 60.00
1,366 × 768 @ 60 Hz 48.39 60.04
Macintosh13” (640 × 480) 35.00 66.67
Macintosh16” (832 × 624) 49.73 74.55
Macintosh21” (1,152 × 870) 68.68 75.06
Note
• • •
• Signals other than above may not be displayed properly.
• • •
• The above signals are reformatted for optimal viewing on your display.
• • •
• Applicable input signal for PC is basically compatible to VESA standard timing.
• • •
• PC signal is magnified or compressed for display, so that it may not be possible to show fine detail with sufficient clarity.
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TH-L32X10A

5 Self-check function
5.1. Self-check
1. Self-check is used to check the bus of the TV and the Hex code.
2. To enter the self-check mode, pressing -/V button on the user’s controller which is on the side of the main unit, press MENU
button on the remote controller unit simultaneously, and then the display screen will appear:
3. Turn off the TV after self-checking, and any programmed channels, channels caption data and some other user defined settings
will be erased and return to factory setting.
Display Ref No. Description P.C.B.
ADV IC4510 A/D convert A-Board
ADAV IC4510 Audio Processor A-Board
GENX IC1100 Microprocessor A-Board
MEM1 IC1101 EEPROM(GENX) A-Board
MEM2 IC8502 EEPROM(PEAKS LITE2) A-Board
TUN TU2901 TUNER A-Board
AVSW IC3001 AUDIO VIDEO SWITCH A-Board
OFDM IC8301 Orthogonal Frequency Division Multiplexing A-Board
TEMP IC1000 TEMP SENSOR A-Board
VIF TU2901 TUNER A-Board
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TH-L32X10A

6 Power LED blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the
defective block can be identified by number of blinking of the Power LED on the front panel of the unit.
Priority Blinking timing SOS detection subject LED blinking
1 INVERTER_SOS 1
2 FAN_SOS 2
3 SOS 3
4 DTV_9V 4
5 SUB_5V 6
6 MAIN_9V 5
7 SUB_3.3V 7
8 MAIN_3.3V 8
9 SOUND_SOS 9
10 ZWEI_SOS 10
11 AUDIO_PWM_SOS 14
12 Emergency 13
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7 Chassis Board Layout
Board Name Function
A-board AVSW, TUN, OFDM, ADV, P-AVC, GENX, EEP, TEMP
P-board Power Supply
V-board Remote, LED,Luminunce Sensor
K-board KEY,Power SW
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8 Before servicing
8.1. Location of Lead wiring
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8.2. EMI 1 processing
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TH-L32X10A

8.3. EMI 2 processing
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9.1. Remove the back cover
1. Lay the main unit down with the back cover facing upwards.
2. Please refer to the Operating Instruction about the pedestal
bracket.
3. Remove screws (×15, ×3).
4. Remove back cover.
9.2. Remove AC cord
1. Remove the back cover. (See 9.1)
2. Disconnect the AC cord from AC cord bracket .
3. Unlock the cable clamper A,disconnect connector P1.
4. Remove AC cord.
9.3. Control panel assy
1. Remove the back cover (See 9.1)
2. Remove screws(×2) and remove control panel assy.
3. Remove screws(×4), then remove K-PCB,control
button,control panel bracket.
9 Maintenance Disassembly
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9.4. Side AV stand bracket,A-board,P-board
1. Take off pedestal bracket. (See 9.1)
2. Remove screws(×2) and side AV stand bracket.
3. Unlock the cable from cable clamper,disconnect the connector.
4. Remove screws(×5), take off A-board;Remove screws(×7), take off P-board.
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9.5. Remove the speaker
1. Remove the back cover (See 9.1)
2. Remove screws(×4) and speaker.
9.6. V-board and LED panel
1. Remove the back cover.(See 9.1)
2. Remove screws(×1) and clamper,disconnect the connector.
3. Remove V-board and LED panel.
9.7. LCD screen
1. Remove main chassis (See 9.3)
2. Remove screws (×6,×12).
3. Remove the VESA Metal Assy,LCD side MTG , LCD bottom
corner MTG, LCD btm MTG.
4. Remove screws (×6) and remove the A-PB-MTG-Metals
(×4).
5. Remove LCD screen.
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10 Service Mode
10.1. How to enter into Service Mode
While pressing [-/v] button of the main unit, press [INFO] button of the remote control three times within 3 seconds.
10.1.1. Key command
“1” button...Main items Selection in forward direction
“2” button...Main items Selection in reverse direction
“3” button...Sub items Selection in forward direction
“4” button...Sub items Selection in reverse direction
“VOL” button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
10.1.2. 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 item Sub item Sample Data Remark
ADJUST CONTRAST 000
WB-ADJ R-GAIN FF
G-GAIN F5
B-GAIN F8
R-CENT 92
G-CENT 80
B-CENT 81
OPTION Boot ROM
STBY-SET 00
Y/C_Delay 0
OPT1 98
OPT2 22
OPT3 05
SRV-TOOL 00
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10.1.3. How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
10.2. SRV-TOOL
10.2.1. How to access
1. Select "SRV-TOOL" in Service main Mode.
2. Press [OK] button on the remote control.
10.2.2. Exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
10.3. Option Description
Name Value Current Default TH-L32X10A Note
option1
b0 ATP Search speed Slow(1)/Fast(0) Fast (0) 0 For CS
b1 TEXT Ch Refresh enable(1)/disable(0) disable (0) 0 For CS
b2 ID-1 enable(1)/disable(0) disable (0) 0 For CS
EEPROM b3 Macrovision Auto-judge enable(1)/disable(0) disable (0) 1For derivative models
004B b4 SRS surround surround_1(1)/surround_0(0) surround_0 (0) 0For derivative models
b5 Teletext Top-service disable(1)/enable(0) enable (0) 0For derivative models
b6 Pre Emphasis enable(1)/disable(0) disable (0) 0For derivative models
b7 1
option2
b0 0
b1 A2 enable(5.5) enable(1)/disable(0) disable (0) 1 For CS
b2 A2 enable(6.0) enable(1)/disable(0) disable (0) 0China/Asia Only
EEPROM b3 A2 enable(6.5) enable(1)/disable(0) disable (0) 0
004C b4 0
b5 NICAM enable(5.5) enable(1)/disable(0) disable (0) 0 For CS
b6 NICAM enable(6.0) enable(1)/disable(0) disable (0) 0China/Asia Only
b7 NICAM enable(6.5) enable(1)/disable(0) disable (0) 0
option3
b0 NICAM priority(ASIA/M.E) enable(1)/disable(0) disable (0) 0 For CS
b1 NICAM priority(K/UK) enable(1)/disable(0) disable (0) 0China/Asia Only
b2 NICAM priority(CHINA) enable(1)/disable(0) disable (0) 0
EEPROM b3 NICAM priority(NZ/INDN) enable(1)/disable(0) disable (0) 0
004D b4 NICAM priority(AUS) enable(1)/disable(0) disable (0) 0
b5 NICAM priority(E.EURO) enable(1)/disable(0) disable (0) 0
b6 NICAM priority(SPECIAL) enable(1)/disable(0) disable (0) 0
b7 0
10.4. OPTION Setting
If the memory IC or DG Board is replaced, option code should be re-memorized.
If you use for other model, you should re-memorized the different option code in SERVICE mode.
Option No. TH-L32X10A
OPTION1 98
OPTION2 22
OPTION3 05
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TH-L32X10A

11 Hotel Mode Access
11.1. Purpose
Restrict a function for hotels.
11.2. 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 3times.
Then, the Hotel mode setup menu is displayed.
11.3. To exit the Hotel mode setup menu.
Disconnect AC power cord from wall outlet or switch off thepower with the [POWER] button on the main unit.
11.4. Explain the Hotel mode setup menu.
Item Function
Hotel Mode Select hotel mode ON/OFF
Initial INPUT Select input signal modes.
Set the input, when each time power is switched on.
Selection :
Off/Analogue TV/Digital TV/AV1/AV2/AV3/PC/HDMI 1/HDMI 2/HDMI 3:
• • •
• Off: give priority to a last memory.
• • •
• Selectable input is depend on the model.
Initial VOL level Adjust the volume when each time power is switched on.
Selection/Range :
Off/0 to 100
• • •
• Off: give priority to a last memory.
Maximum VOLlevel Adjust maximum volume.
Range :
0 to 100
Initial POS Select programme number.
Selection :
Off/0 to 99
• • •
• Off: give priority to a last memory.
Button lock Select local key conditions.
Selection :
Off/SETUP/MENU/All
• • •
• Off: altogether valid.
• • •
• SETUP: only F-key is invalid.
(Tuning guide (menu) can not be selected.)
• • •
• MENU: only F-key is invalid.
(only Volume/Mute can be selected.).
• • •
• ALL: altogether invalid.
Remote lock Select remote control key conditions.
Selection :
Off/SETUP/MENU
• • •
• Off: altogether valid..
• • •
• SETUP: only Setup menu is invalid.
• • •
• MENU: Picture/Sound/Setup menu are invalid.
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12 Adjustment Method
12.1. P-board voltage testing point
Instrument Name Connection Remarks
Digital Voltmeter
Procedures
1. Turn on the power switch and check if the voltages at every testing point are involved in the
below specifications.
2. Switch off the power through remote control and place it in the standby mode. Check if the
voltages at very testing point are involved in the below specifications.
12.2. A-board voltage testing point
Instrument Name Connection Remarks
Digital Voltmeter
Procedures
1. Turn on the power switch and check if the voltages at every testing point are involved in
the below specifications.
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