Panasonic TH-42PV8D User manual

© 2008 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
ORDER NO.MD0804019CE
Plasma Television
Model No. TH-42PV8D
TH-42PV8H
TH-42PV8HM
TH-42PV8M
TH-42PV8MR
TH-42PV8MS
TH-42PV8MT
GPH11DA Chassis

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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.
4. 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.
5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
6. 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 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. Reserve the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUGH CURRENT) expressed as voltage U1and U2, does not exceed the following values:
For a. c.: U1= 35 V (peak) and U2= 0.35 V (peak);
For d. c.: U1= 1.0 V,
Note:
The limit value of U2= 0.35 V (peak) for a. c. and U1= 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0
mA d. c.
The limit value U1= 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is 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.
Figure 1

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2 Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically 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 alumi-
num 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 compara-
ble 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 brush-
ing 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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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 sol-
der. 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. How-
ever, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

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3 Service Navigation
3.1. Service Hint
Board Name Function Board Name Function
P Power Supply C1 Data Driver (Lower Right)
A DC-DC Converter
Speaker out, Sound Processor
AV Terminal, AV Switch
Digital Signal Processor, Micon, HDMI Interface
Peaks Lite 2p
Format Converter, Plasma AI, Sub-Field Processor
C2 Data Driver (Lower Left)
SC Scan Drive
SU Scan out (Upper)
SD Scan out (Lower)
SS Sustain Drive
G Key Switch, Front Terminal
K Remote receiver, Power LED GS SD Card Slot
S Power Switch

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3.2. Applicable signals

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4 Specifications
Power Source AC 220 - 240 V, 50/60 Hz (D/H/HM/M/MR/MT)
Power Consumption AC 110 - 240 V, 50/60 Hz (MS)
Average use 335 W (D/H/HM/M/MR/MT)
340 W (MS)
Standby condition 0.7 W
Plasma Display panel
Aspect Ratio 16:9
Visible screen size 106 cm (diagonal)
922 mm (W) ×518 mm (H)
Number of pixels 786,432 (1,024 (W) ×768 (H)) [3,072 ×768 dots]
Sound
Speaker 160 mm ×42 mm ×2 pcs, 8 Ω
Audio Output 20 W (10 W + 10 W), 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 Systems / Band name
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 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)
CATV
S1 - S20 (OSCAR)
1 - 125 (USA 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 RCA PIN Type ×2 0.5 V [rms]
VIDEO 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]
AV2 Input
AUDIO L - R RCA PIN Type ×2 0.5 V [rms]
VIDEO 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 RCA PIN Type ×2 0.5 V [rms]
VIDEO 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)
AV4 Input
AUDIO L - R RCA PIN Type ×2 0.5 V [rms]
VIDEO 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)

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Note
• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.
Monitor Output
AUDIO L - R RCA PIN Type ×2 0.5 V [rms] (high impedance)
VIDEO RCA PIN Type ×1 1.0 V [p-p] (75 Ω)
Others
HDMI1 / 2 Input TYPE A Connectors This TV supports [HDAVI Control 3] function.
PC Input HIGH-DENSITY D-SUB 15PIN R, G, B/ 0.7 V [p-p] (75 Ω)
HD, VD/TTL Level 2.0 - 5.0 V [p-p] (high impedance)
Card slot SD Card slot ×1 (Factory use)
Dimensions (W ×H ×D) 1,020 mm ×727 mm ×327 mm (With Pedestal)
1,020 mm ×679 mm ×95 mm (TV only)
Mass 27.5 kg Net (With Pedestal)
25.5 kg Net (TV only)

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5 Service Mode
5.1. How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [0] button of the remote control three times within 2 seconds.
5.1.1. 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
[RED] button...All Sub items Selection in forward direction
[GREEN] button...All Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

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5.1.2. 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.
5.1.3. How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

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5.2. Service tool mode
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 will be cleared by [Self-check indication and forced to factory shipment setting].
5.2.3. POWER ON TIME/COUNT
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 or switch off the power with the [POWER] button on the main unit.

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5.3. 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] : Vol. [Down] + [REMOTE] : AV (3 times)
Then, the Hotel mode setup menu is displayed.
3. To exit the Hotel mode setup menu
Disconnect AC power cord from wall outlet or switch off
the power with the [POWER] button on the main unit.
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/TV/AV1/AV2/AV3/AV4/PC/HDMI1/HDMI2
• Off: give priority to a last memory. However,
Euro model is compulsorily set to TV.
• AVnS/AVnC: only Euro model selectable
• PC: selectable with VGA option
Initial POS Select programme number.
Selection :
Off/0 to 99
• Off: give priority to a last memory
Initial VOL level Adjust the volume when each time power is
switched on.
Selection/Range :
Off/0 to 63
• Off: give priority to a last memory
Maximum VOL
level
Adjust maximum volume.
Range :
0 to 100
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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6 Troubleshooting 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 con-
trol for more than 3 seconds.
6.1.2. Screen display
6.1.3. Check Point
Confirm the following parts if NG was displayed.
6.1.4. Exit
Disconnect the AC cord from wall outlet or switch off the power with the [POWER] button on the main unit.

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6.2. Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an 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 the number of blinks of the Power LED on the front panel of the unit.

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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.)

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6.4. No Picture

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6.5. Local screen failure
Plasma display may have local area failure on the screen. Fig-1 is the possible defect P.C.B. for each local area.
Fig-1

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7 Disassembly and Assembly Instructions
7.1. Remove the rear cover
1. See Service Hint (Section 3)
7.2. Remove the P-Board
Caution:
To remove P.C.B. wait 1 minute after power was off for dis-
charge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (P2, P6, P7, P9, P11, P12 and
P25).
3. Remove the screws (×10 ) and remove the P-Board.
7.3. Remove the rear terminal cover
1. Remove the screws (×2 , ×2 ).
2. Remove the rear terminal cover.
7.4. Remove the Tuner unit
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (A1, A7, A11, A12, A25, A31,
A32, A51, A52).
3. Remove the screws (×4 , ×1 ) and remove the tuner
unit.
7.5. Remove the GS-Board
1. Disconnect the connector (GS52).
2. Remove the screw ( ) and remove the rear SD bracket.

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3. Remove the screw ( ) and remove the GS-Board.
7.6. Remove the A-Board
1. Remove the tuner unit. (See section 7.4.)
2. Remove the screws (×7 ) and remove the A-Board.
7.7. Remove the SU-Board
1. Remove the flexible cables (SU1, SU2, SU3 and SU4)
connected to the SU-Board.
2. Remove the flexible cable (SU11-SD11) and the bridge
connector (SC41-SU41).
3. Remove the screws (×2 , ×2 ) and remove the SU-
Board.
7.8. Remove the SD-Board
1. Remove the flexible cables (SD1, SD2, SD3 and SD4)
connected to the SD-Board.
2. Remove the flexible cable (SU11-SD11) and the bridge
connectors (SC42-SD42 and SC46-SD46).
3. Remove the screws (×2 , ×2 ) and remove the SD-
Board.

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7.9. Remove the SC-Board
1. Remove the SU-Board and SD-Board. (See section 7.7.
and 7.8.)
2. Unlock the cable clampers to free the cable.
3. Disconnect the connector (SC2).
4. Disconnect the flexible cable (SC20).
5. Remove the screws (×6 ) and remove the SC-Board.
7.10. Remove the SS-Board
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (SS11, SS12, SS23 and
SS34).
3. Disconnect the flexible cables (SS53A and SS56A).
4. Remove the molding prop (×1 ).
5. Remove the screws (×5 ) and remove the SS-Board.
7.11. Remove the stand brackets
1. Remove the plasma panel section from the servicing
stand and lay on a fiat surface such as a table (covered)
with the plasma panel surface facing downward.
2. Remove the stand brackets (left, right) fastening screws
(×4 each) and remove the stand brackets (left, right).