Panasonic TX-42LZ80X User manual

© Panasonic Corporation 2008. Unauthorized
copying and distribution is a violation of law
ORDER NO. MTV0801667CE
LCD TV
Model No. TX-42LZ80X
TX-42LZ80Y
Chassis: LH81
Destination: MIDDLE EAST
IRAN
Specifications
Power Source AC AUTO 110 - 240V, 50/60 Hz (TX-42LZ80X)
AC SINGLE 220 - 240V, 50/60 Hz (TX-42LZ80Y)
Power Consumption
Average use 206 W
Standby condition 1.0 W
Display panel
Aspect Ratio 16:9
Visible screen size 106 cm (diagonal)
(No. of pixels) 2,073,600 (1,920 (W) ×1,080 (H))
Sound
Speaker Full range ×2 pcs, 8 Ω
Audio Output 20 W (10 W + 10 W), 10% THD
Headphones M3 (3.5 mm) Jack ×1
PC Signals VGA, SVGA, XGA, SXGA, WXGA
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Receiving Systems / Band name SYSTEMS FUNCTIONS
1PAL B, G, H
Reception of broadcast transmission and
playback from video cassette tape recorders.
2PAL I
3PAL D, K
4SECAM B, G
5SECAM D, K
6SECAM K1
7NTSC M (NTSC 3.58 / 4.5MHZ)
8NTSC 4.43 / 5.5 MHz
Playback from special VCR’s or DVD.
9NTSC 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

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TABLE OF CONTENTS PAGE PAGE
1 Safety Precautions -----------------------------------------------4
1.1. General Guidelines ----------------------------------------4
1.2. Touch-Current Check--------------------------------------4
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices------------------ 5
3 About Lead Free Solder (PbF)-------------------------------- 6
4 Self Check Function --------------------------------------------- 7
15 PAL 60 Hz / 5.5 MHz Playback from Special Disc Players and
Special VCR’s or DVD.
16 PAL 60 Hz / 6.0 MHz
17 PAL 60 Hz / 6.5 MHz
Receiving Channels (Regular TV)
VHF 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 (U.S.A.)
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 (U.S.A.)
CATV S1 - S20 (OSCAR)
1 - 125 (U.S.A.CATV)
C13 - C49 (JAPAN)
S21 - S41 (HYPER)
Z1 - Z37 (CHINA)
5A, 9A (AUST.)
Aerial - Rear VHF / UHF
Operating Conditions Temperature : 0°C - 40°C
Humidity : 20 % - 80 % RH (non-condensing)
Connection Terminals
AV1 Input AUDIO L-R VIDEO RCA PIN Type ×2 0.5 V [rms]
RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
AV2 Input AUDIO L-R VIDEO RCA PIN Type ×2 0.5 V [rms]
RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
COMPONENT Y 1.0 V[p-p] (including synchronization)
PB/CB, PR/CR± 0.35 V [p-p]
AV3 Input AUDIO L-R VIDEO RCA PIN Type ×2 0.5 V [rms]
RCA PIN Type ×1 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)
Others HDMI 1/2 Input TYPE A Connectors
Audio Input for HDMI1 RCA PIN Type ×2 0.5 V [rms]
PC Input HIGH-DENSITY D-SUB 15 PIN R, G, B / 0.7 V[p-p] (75 Ω)
HD, VD / TTL LEVEL 2.0-5.0 V[rms] (high impedance)
Monitor
Input AUDIO L-R VIDEO RCA PIN Type ×2 0.5 V [rms] (High impedance)
RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
Dimension (W x H x D) 1027 mm ×710 mm ×295 mm (With TV Stand)
1027 mm ×668 mm ×110 mm (TV only)
Mass 23 kg (Net)
Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.

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4.1. Self Check--------------------------------------------------- 7
4.2. Power LED Blinking Timing Chart--------------------- 7
5 Chassis Board----------------------------------------------------- 9
5.1. Chassis Installation --------------------------------------- 9
6 Location of Controls and Components ------------------10
6.1. Wire Dressing ---------------------------------------------10
7 Disassembly and Assembly Instructions ---------------11
7.1. AC Code dressing for K2CQ2YY00009 (2 Pin) ---11
7.2. AC Code dressing for K2CT2YY00009 (3 Pin) ---11
7.3. Chassis Rail Installation --------------------------------12
7.4. VESA Bracket Installation------------------------------13
7.5. Pedestal Assembly Preparation ----------------------14
7.5.1. Pedestal Rotation Base----------------------------14
7.5.2. Pedestal Stand Base Preparation ---------------14
7.5.3. Pedestal Stand Cover Preparation --------------14
7.6. LED Panel Installation-----------------------------------15
7.7. LCD Panel Assembly Installation---------------------16
7.8. LVDS Installation -----------------------------------------17
7.9. Back Cover-------------------------------------------------17
8 Service Mode Adjustment ------------------------------------19
8.1. SERVICE 1-------------------------------------------------19
8.2. SERVICE 2-------------------------------------------------19
8.3. Self Check Mode -----------------------------------------19
8.4. Hotel Mode Adjustment---------------------------------19
9 Measurements and Adjustments---------------------------21
9.1. Voltage Chart of A Board-------------------------------21
9.2. Voltage Chart of P Board-------------------------------21
10 Printed Circuit Board-------------------------------------------22
10.1. A-Board -----------------------------------------------------22
10.2. A-Board -----------------------------------------------------23
11 Schematic Diagram---------------------------------------------24
11.1. Schematic Diagram Notes -----------------------------24
11.2. A Board -----------------------------------------------------25
11.2.1. A Board (1 / 11)---------------------------------------25
11.2.2. A Board (2 / 11)---------------------------------------26
11.2.3. A Board (3 / 11)---------------------------------------27
11.2.4. A Board (4 / 11)---------------------------------------28
11.2.5. A Board (5 / 11)---------------------------------------29
11.2.6. A Board (6 / 11)---------------------------------------30
11.2.7. A Board (7 / 11)---------------------------------------31
11.2.8. A Board (8 / 11)---------------------------------------32
11.2.9. A Board (9 / 11)---------------------------------------33
11.2.10. A Board (10 / 11)-------------------------------------34
11.2.11. A Board (11 / 11)-------------------------------------35
11.3. G Board-----------------------------------------------------36
11.3.1. G Board (1 / 2)----------------------------------------36
11.3.2. G Board (2 / 2)----------------------------------------37
11.4. K2 Board----------------------------------------------------38
11.4.1. K2 Board (1 / 1) --------------------------------------38
11.5. P Board -----------------------------------------------------39
11.5.1. P Board (1 / 4)----------------------------------------39
11.5.2. P Board (2 / 4)----------------------------------------40
11.5.3. P Board (3 / 4)----------------------------------------41
11.5.4. P Board (4 / 4)----------------------------------------42
11.6. SW Board---------------------------------------------------43
11.6.1. SW Board (1 / 1)-------------------------------------43
11.7. V Board -----------------------------------------------------44
11.7.1. V Board (1 / 3)----------------------------------------44
11.7.2. V Board (2 / 3)----------------------------------------45
11.7.3. V Board (3 / 3)----------------------------------------46
12 Exploded View and Replacement Parts List -----------47
12.1. Exploded View and Mechanical Replacement
Parts List ---------------------------------------------------47
12.2. Electrical Replacement Parts List--------------------47
12.2.1. Replacement Parts List Notes -------------------47
12.2.2. Electrical Replacement Parts List--------------- 48

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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.
1.2. Touch-Current Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents 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 the Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part and measure the voltage at each point.
5. The potential at any point (touch current) expressed as voltage U1and U2, do not exceed the following values:
For AC: U1= 35 V (peak) and U2= 0.35 V (peak);
For DC: U1= 1.0 V,
NOTE :
The limit value of U2= 0.35 V (peak) for AC and U1= 1.0 V for DC correspond to the values 0.7 mA (peak) AC and 2.0 mA
DC.
The limit value U1= 35 V (peak) for AC correspond to the value 70 mA (peak) AC for frequencies greater than 100 kHz.
6. Should a measurement be out 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.

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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
aluminium 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 charges 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, aluminium 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 harmless 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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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 (PbF) used in our manufacturing process and discussed below is (Sn+Ag+Cu).
Those are Tin (Sn), Silver (Ag) and Copper (Cu), although other types are available.
This model uses PbF in its manufacture due to environmental conservation issues. For service and repair work, we would suggest
the use of PbF as well, although Pb may be used.
PCBs manufactured using lead-free will have the “PbF within a leaf Symbol” stamped on their back.
Caution
• PbF has a higher melting point than that of 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).
• PbF 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 PbF on the pins or solder area before applying Pb. If this is not
practical, be sure to heat the PbF until it melts, before applying Pb.
• After applying PbF to double layered boards, please check the component side for excess solder which may flow onto the
opposite side (see Figure 2).
Figure 2
Suggested PbF
There are several kinds of PbF available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu
(tin, copper) and Sn+Zn+Bi (tin, zinc, bismuth) solders can also be used.
Figure 3

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4 Self Check Function
4.1. Self Check
1. Self Check is used to automatically check the bus lines and hexadecimal codes of the TV set.
2. To get into the Self Check mode, press the “DOWN” button on the customer’s controls at the front of the set, at the same time
pressing the “MENU” button on the remote control. The screen that will show is represented by Figure 4.
3. Press both “OFF TIMER” button on the remote control and “DOWN” key button on the control panel.
Figure 4
4.2. Power LED Blinking Timing Chart
1. Subject
Information of LED blinking timing chart.
2. Contents
When an abonormality has occurred in the unit, the protection circuit operates and resets to standby mode. At this time, the defective block
can be identified by the number of blinks of the Power LED on the front panel of the unit.

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5 Chassis Board
5.1. Chassis Installation
1. Fix 12 pcs screws to ‘A-board’ and ‘P-board’.
Tightening torque should be 50 Ncm to 80 Ncm (5 kgf cm to 8 kgf cm).
2. Fix connectors G1, G2 and G3 at AT G-board.
3. Fix 2 pcs screws to the side of AV bracket assembly.
Tightening torque should be 100 Ncm to 130 Ncm (10 kgf cm to 13 kgf cm).
4. Fix 1 pcs screw to cabinet with power switch PCB bracket.

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6 Location of Controls and Components
6.1. Wire Dressing
Connection 12345678910
1CN1~P2
2 CN 1 ~ A 16
3A11~P3
4 A 12 ~ P 4
5A7~G4
6V1~A8
7 A 3 ~ SPEAKER (R)
8 A 3 ~ SPEAKER (L)
9P1~SW2
10 P 5 ~ CN201

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7 Disassembly and Assembly Instructions
7.1. AC Code dressing for K2CQ2YY00009 (2 Pin)
7.2. AC Code dressing for K2CT2YY00009 (3 Pin)

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7.3. Chassis Rail Installation
1. Stick sponges at chassis rail for rail no.1, no.2 and no.3.
2. Fix 3 pieces of chassis frames and fix 4 screws to the bottom and top mountings.
-Tightening torque should be 100 N cm - 130 N cm (10 kgf cm to 13 kgf cm).

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7.4. VESA Bracket Installation
1. Stick 2 pcs of felt at VESA bracket (each part).
2. Fix 4 pcs screws to VESA bracket.
Tightening torque should be 100 Ncm to 130 Ncm (10 kgf cm to 13 kgf cm).
3. Slot pedestal jig assembly to cabinet.

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7.5. Pedestal Assembly Preparation
7.5.1. Pedestal Rotation Base
7.5.2. Pedestal Stand Base Preparation
7.5.3. Pedestal Stand Cover Preparation

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7.6. LED Panel Installation
1. Put PCB to LED panel and ensure hook is properly locked on the PCB.
2. Fix LED panel to cabinet with 3 screws.
Tightening torgue should be 0.5 N m ~ 0.8 N m (5 to 8 kgf cm).
= Screw - XTW3 + 10TFJ (3 pcs)
3. Fix wires at cabinet slit and make sure all wires are fully inserted to avoid contact with the pedestal metal.

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7.7. LCD Panel Assembly Installation
1. Put LCD panel to cabinet assembly.
2. Follow by LCD top mounting and LCD bottom mounting.
3. Fix screw into LCD panel, LCD top mounting and LCD bottom mounting.
- Tightening torque should be 100 N cm ~ 130 N cm (10 kgf cm to 13 kgf cm).

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7.8. LVDS Installation
1. Insert LVDS wire into T-con connector.
2. Stick the felts to hold LVDS wire.
7.9. Back Cover
1. Stick felts to back cover.

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2. Stick rear AV indication and HDMI sheet at cabinet.

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8 Service Mode Adjustment
Set timer to 30min, press the “RECALL” button on the remote control and press “-” vol button on the LCD panel.
8.1. SERVICE 1
1. Press button cursor up and down for adjustment below, then press ok button.
•Tests
• Backlight
• Colours
•Keys
• RedLED
• Checksum
8.2. SERVICE 2
1. Select CHECK mode in service 1, by press button 4, then press the “HOLD” button (on the remote control) to enter service 2.
8.3. 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.
8.4. 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.

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