Panasonic TX-32LX1X User manual

© 2004 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
TX-32LX1X
TX-32LX1M
TX-32LX1A
TX-32LX1T
TC-32LX1H
TC-32LX1DJ
TX-26LX1X
TX-26LX1M
TX-26LX1A
TX-26LX1T
TC-26LX1H
LH18 Chassis
LCD TV
Specifications
Powe
r
Source
A
C 100-127
/
200-240V, 50
/
60Hz
Powe
r
Consumption
A
verage use
100-127V: 130W (26 inch model)
200-240V: 129W (26 inch model)
Standby condition: 1.8W
Power Off: 1.5W
A
verage use
100-127V: 165W (32 inch model)
200-240V: 163W (32 inch model)
LCD Wide XGA (1,280 × 768 pixels)
15 : 9 aspect ratio LCD panel
Screen Size 566.4mm (W) x 339.8mm (H) (26 inch model) 687.4mm (W) x 412.4mm (H) (32 inch model)
Sound
Speake
r
Ø8cm × 2pcs, Ø4cm × 2pcs, 8W
Audio Output 20W (10W + 10W)
Headphones M3 (3.5mm) Jack x 1
ORDER NO. ITD0406016C3
Downloaded From http://www.free-service-manuals.com

Receiving Systems
/
Band name
Receiving Channels Regula
r
TV
V
HF BAND 2-12 (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 BAND 21-69 (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)
CAT
V
S1-S20 (OSCAR)
1-125 (USA CATV)
C13-C49 (JAPAN)
S21-S41 (HYPER)
Z1-Z37 (CHINA)
5A, 9A (AUST.)
Aerial-Rea
r
UHF/VHF
Operating Conditions Temperatu
r
e: 5°C-35°C
Humidity: 5%-90% RH (non-condensing)
Connection Terminals
AV1
/
2-Rea
r
VIDEO (RCA Pin Type) 1.0Vp-p (75W)
S-VIDEO (MINI DIN 4-pin) Y: 1.0Vp-p (75W) C: 0.286Vp-p (75W)
A
UDIO L-R (RCA Pin Type × 2) 0.5V
r
ms
AV3-Front VIDEO (RCA Pin Type) 1.0Vp-p (75W)
S-VIDEO (MINI DIN 4-pin) Y: 1.0Vp-p (75W) C: 0.286Vp-p (75W)
A
UDIO L-R (RCA Pin Type × 2) 0.5V
r
ms
AV4-Rea
r
VIDEO (RCA Pin Type) 1.0Vp-p (75W)
A
UDIO L-R (RCA Pin Type × 2) 0.5V
r
ms
Y
1.0Vp-p (including synchronization)
PB/P
R±0.35Vp-p
HD/VD 1.0-5.0Vp-p (high impedance) (TTL level)
MONITOR OUT VIDEO (RCA Pin Type) 1.0Vp-p (75W)
A
UDIO L-R (RCA Pin Type × 2) 0.5V
r
ms
Others SD Card slot × 1, PC Card slot × 1
Dimensions (W x H x D)
Including TV Stand 844mm x 571.8mm x 321mm (26 inch model) 1,000mm x 651.7mm x 321mm (32 inch model)
TV Set Only 844mm x 478mm x 137mm (26 inch model) 1,000mm x 558mm x 137mm (32 inch model)
Weight 22.5
k
g Net (26 inch model) 27kg Net (32 inch model)
2
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

1 Safety Precautions 4
1.1. General Guidelines 4
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 5
3 Self Check 6
4 Chasis Board Layout 7
5 Before servicing 8
5.1. Kind and location of the flexible cable 8
5.2. How to remove the connector 9
6 Disassembly for Service 10
6.1. Stand ass´y 10
6.2. Rear cover 10
6.3. Rear AV bracket ass´y 10
6.4. Rear metal frame 11
6.5. Speaker box (left and right) 11
6.6. TA-Board 11
6.7. A-Board 11
6.8. IC heat shink 11
6.9. AP-Board 12
6.10. DG-Board 12
6.11. H-Board 12
6.12. P-Board 12
6.13. Front bracket 13
6.14. K-Board 13
6.15. JG-Board 13
6.16. V-Board 13
6.17. Main chassis 13
6.18. LCD panel 14
7 Location of Lead Wiring 15
8 Service Mode Function 16
8.1. How to enter SERVICE 1 16
8.2. How to enter SERVICE 2 16
8.3. Option Description 18
8.4. Option Code Setting (26 inch model) 20
8.5. Option Code Setting (32 inch model) 20
9 Adjustment method 21
9.1. Video Signal Level Adjustment 21
9.2. WB Adjustment 21
10 Conductor Views 23
10.1. P-Board 23
10.2. AP-Board 27
10.3. A-Board 29
10.4. DG-Board 32
10.5. H and TA-Board 35
10.6. JG-Board 37
10.7. K and V-Board 39
11 Block and Schematic Diagrams 41
11.1. Schematic Diagram Notes 41
11.2. Main Block Diagram 42
11.3. Signal Block Diagram 43
11.4. Power Block Diagram 46
11.5. P-Board Schematic Diagram (TC-32LX1DJ, TX-
26/32LX1T) 48
11.6. P-Board Schematic Diagram (TC-26/32LX1H, TX-
26/32LX1A/M/X) 49
11.7. AP-Board (1 of 2) Schematic Diagram 50
11.8. AP-Board (2 of 2) Schematic Diagram 51
11.9. A-Board (1 of 4) Schematic Diagram 52
11.10. A-Board (2 of 4) Schematic Diagram 53
11.11. A-Board (3 of 4) Schematic Diagram 54
11.12. A-Board (4 of 4) Schematic Diagram 55
11.13. DG-Board (1 of 6) Schematic Diagram 56
11.14. DG-Board (2 of 6) Schematic Diagram 57
11.15. DG-Board (3 of 6) Schematic Diagram 58
11.16. DG-Board (4 of 6) Schematic Diagram 59
11.17. DG-Board (5 of 6) Schematic Diagram 60
11.18. DG-Board (6 of 6) Schematic Diagram 61
11.19. H-Board Schematic Diagram 62
11.20. JG-Board (1 of 2) Schematic Diagram 63
11.21. JG-Board (2 of 2) Schematic Diagram 64
11.22. K, TA and V-Board Schematic Diagram 65
12 Parts Location & Mechanical Replacement Parts List 67
12.1. Parts Location 67
12.2. Packing Exploded View 69
12.3. Mechanical Replacement Parts List 70
13 Replacement Parts List 72
13.1. Replacement Parts List Notes 72
13.2. Electrical Replacement Parts List 73
Note:
Design and Specifications are subject to change without notice. Weight and Dimensions shown are approximate.
CONTENTS
Page Page
3
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

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
1MWand 5.2MW.
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 1.5kW, 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 Safety 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
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

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 alminum
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).
5
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

3 Self Check
1.Self-Check is used to automatically check the bus lines and hexadecimal code of the TV set.
2.To enter the Self -Check mode press the Down ( ) button on the TV set, at the same time pressing the Off-Timer button
on the remote controller, and the screen will show :
3.Turn off the TV to reset JPEG Viewer circuit after SELF-CHECK.
If the CCU ports have been checked and found to be incorrect or not located then “--” will appear in place of “O.K.”.
Display Ref. No. Description P.C.B.
MEM IC1107 Memory DG-Board
GC3FM IC4017 Global Core MAIN DG-Board
GC3FS IC4016 Global Core SUB DG-Board
GC3I IC4003 Global Core DG-Board
HAD2 IC4002 OSD RGB A/D Converter DG-Board
AVSW1 IC3101 AV Switch VIDEO A-Board
AVSW2 IC2101 AV Switch AUDIO A-Board
Tun1 TU001 Tuner TA-Board
DAC1 IC1106 DAC control1 DG-Board
DAC2 IC3110 DAC control2 A-Board
MSP IC2102 Stereo Decoder A-Board
JPEG IC6513 JPEG Viewer JG-Board
6
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

4 Chasis Board Layout
Board Name Function
A-Board AV Switch, Audio
AP-Board Regulator
DG-Board Global Core, A/D Converter, MCU
H-Board AV connector
K-Board Switch, Front Terminal
JG-Board JPEG Viewer
P-Board DC Power Supply
TA-Board Tuner
V-Board Power Switch, Remote Reciever, LED
7
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

5 Before servicing
5.1. Kind and location of the flexible cable
Ref No. Flexible cable Connecter type Pins Location Opposite Ref No.
A1 ltype1 50pin A-Board DG1
A2 ltype1 50pin A-Board H1
A3 - - 20pin A-Board K3
A4 ltype1 30pin A-Board H2
A5 ltype1 20pin A-Board AP2
A22 - - 3pin A-Board speaker box R
A23 - - 3pin A-Board speaker box L
AP1 - - 6pin AP-Board P1
AP2 ltype1 20pin AP-Board A5
AP3 - - 2pin AP-Board P5
AP4 - - 11pin AP-Board P4
AP5 ltype1 50pin AP-Board DG2
AP7 - - 8pin AP-Board JG6
DG1 ltype1 50pin DG-Board A1
DG2 ltype1 50pin DG-Board AP5
DG5 ltype2 30pin DG-Board LCD-panel
DG7 - - 8pin DG-Board V1
DG11 - - 11pin DG-Board JG3
H1 ltype1 50pin H-Board A2
H2 ltype1 30pin H-Board A4
K3 - - 20pin K-Board A3
JG3 - - 11pin JG-Board DG11
JG6 - - 8pin JG-Board AP7
P1 - - 6pin P-Board AP1
P2 - - 2pin P-Board AC-cord
P3 - - 8pin P-Board LCD-panel
P4 - - 11pin P-Board AP4
P5 - - 2pin P-Board AP3
V1 - - 8pin V-Board DG7
8
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

Connector type1
Connector type2
5.2. How to remove the connector
9
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

6.1. Stand ass´y
1.Lay down the main unit so that the rear cover faces upward.
2.Remove the cable cover.
3.Remove the fixing screws (4pcs).
4.Remove the stand ass´y.
6.2. Rear cover
1.Remove the stand ass´y. (See 6.1.)
2.Remove the fixing screws (14pcs).
3.Remove the rear cover.
6.3. Rear AV bracket ass´y
1.Remove the rear cover. (See 6.2.)
2.Remove the AC cord.
3.Remove the fixing screws (2pcs).
4.Remove the rear AV bracket ass´y.
6 Disassembly for Service
10
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

6.4. Rear metal frame
1.Remove the rear cover (See 6.2.) and the rear AV bracket
ass´y. (See 6.3.)
2.Unlock the cable clampers to free the cable.
3.Remove the fixing screws (6pcs).
4.Remove the rear metal frame.
6.5. Speaker box (left and right)
1.Remove the rear cover. (See 6.2.)
2.Disconnect the couplers (SPL and SPR).
3.Remove the fixing screws (8pcs).
4.Remove the speaker box (left and right).
6.6. TA-Board
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Remove the fixing screw (1pcs).
3.Remove the TA-Board.
6.7. A-Board
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Remove the TA-Board.
3.Disconnect the couplers (A3, A22 and A23) and the flexible
cables (A1, A2, A4 and A5).
4.Remove the fixing screws (4pcs).
5.Remove the A-Board.
6.8. IC heat shink
1.Pressing IC heat shink spring and pull up IC heat shink.
11
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

6.9. AP-Board
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Disconnect the couplers (AP1, AP3, AP4 and AP7) and the
flexible cables (AP2 and AP5).
3.Remove the fixing screws (4pcs).
4.Remove the AP-Board.
6.10. DG-Board
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Unlock the cable clampers to free the cable.
3.Disconnect the couplers (DG7, and DG11) and the flexible
cables (DG1, DG2 and DG5).
4.Remove the fixing screws (5pcs).
5.Remove the shield case.
6.Remove the DG-Board.
6.11. H-Board
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Disconnect the flexible cables (H1 and H2).
3.Remove the fixing screws (2pcs).
4.Remove the H-Board.
6.12. P-Board
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Disconnect the couplers (P1, P2, P3, P4 and P5).
3.Remove the fixing screws (3pcs).
4.Remove the P-Board.
12
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

6.13. Front bracket
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Disconnect the couplers (K3, JG3, JG6 and V1).
3.Remove the fixing screws (2pcs).
4.Remove the front bracket.
6.14. K-Board
1.Remove the front bracket. (See 6.13.)
2.Remove the hooks (4place).
3.Remove the K-Board.
6.15. JG-Board
1.Remove the front bracket. (See 6.13.)
2.Remove the hooks (3place).
3.Remove the JG-Board.
6.16. V-Board
1.Remove the front bracket. (See 6.13.)
2.Remove the hooks (2place).
3.Remove the V-Board.
6.17. Main chassis
1.Remove the rear AV bracket ass´y (See 6.3.) and the rear
metal frame. (See 6.4.)
2.Disconnect the couplers (K3, JG3, JG6, V1, P2, P3, SPL
and SPR) and the flexible cables (DG5).
3.Remove the fixing screws (4pcs).
4.Remove the main chassis.
·
· ·
· Disconnecting flexible cable from the coupler.
Lift up both ends of the cable lock (brown colored)
simultaneously to release the locking. Once the flat cable is
disconnected from the coupler, the cable lock tends to
detach from the coupler easily. Due precaution should be
paid on it.
·
· ·
· Reconnecting flexible cable to the coupler.
Attach the cable lock (brown) to the coupler (white) with its
both ends being pulled up. Insert the flat cable into the
coupler over the cable lock until the cable stops firmly at the
coupler end. Press down both ends of the cable lock until
their upper faces are positioned flat to lock the cable.
13
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

6.18. LCD panel
1.Remove the main chassis. (See 6.17.)
2.Remove the fixing screws (8pcs).
3.Remove the LCD panel.
14
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

7 Location of Lead Wiring
15
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

8 Service Mode Function
MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be
adjusted by remote controller in Service Mode.
8.1. How to enter SERVICE 1
1.In main menu, choose sound menu, set BASS to MAXIMUM, and set TREBLE to MINIMUM.
2.Simultaneously press INDEX (LX1A/M/X) CH SEARCH (LX1H/DJ) button on remote controller and DOWN button [ ] on the
TV set.
8.2. How to enter SERVICE 2
1.Enter SERVICE 1
2.Select the “TEXT Clamper Level”.
3.Set the channel to CH99.
4.Press HOLD (LX1A/M/X) STILL (LX1H/DJ) button on remote controller.
Note:
To exit to Service mode, press Power button on remote controller.
16
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

17
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

8.3. Option Description
18
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

19
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H

8.4. Option Code Setting (26 inch model)
If the memory IC (IC1115) or DG Board is replaced, option code should be re-memorized.
Spare part of IC1115 is already memorized all Data for TX-26LX1M.
If you use for other model, you should re-memorized the different option code in SERVICE 2 mode.
8.5. Option Code Setting (32 inch model)
If the memory IC (IC1115) or DG Board is replaced, option code should be re-memorized.
Spare part of IC1115 is already memorized all Data for TX-32LX1M.
If you use for other model, you should re-memorized the different option code in SERVICE 2 mode.
20
TX-32LX1X / TX-32LX1M / TX-32LX1A / TX-32LX1T / TC-32LX1H / TC-32LX1DJ / TX-26LX1X / TX-26LX1M / TX-26LX1A / TX-26LX1T / TC-26LX1H