Panasonic TH-42PHD8BK User manual

©2005 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
TH-42PHD8BK
TH-42PHD8BS
TH-42PHD8EK
TH-42PHD8ES
GPH8D Chassis
High Definition Plasma Display
Specifications
Power Source 220 - 240 V
A
C, 50/60 Hz
Power Consumption
Normal use 295 W
Stand-b
y
condition Save off 0.8 W, Save on 0.6 W (42 inch)
Power off condition 0.3 W (42 inch)
Plasma Displa
y
panel Drive method:
A
C type 42-inch,
16:9 aspect ratio
Contrast Ratio 3000:1
Screen size 920 mm (W) × 518 mm (H) × 1,056 mm (diagonal)
(No. of pixels) 786,432 (1,024 (W) × 768 (H))
[3,072 × 768 dots]
Operating condition
Temperature 32 °F - 104 °F (0 °C - 40 °C)
Humidit
y
20 % - 80 %
Applicabl
e
signals
Color System NTSC, PAL, PAL60, SECAM, Modified NTSC
Scanning format 525 (480) / 60i 60p, 625 (575)
/
50i 50p, 750 (720)
/
60p 50p, 1125 (1080) / 60i 50i 24p 25p
30p 24sF .... SMPTE274M, 1250 (1080) / 50i
PC signals VGA, SVGA, XG
A
SXGA, UXG
A
..... (compressed)
Horizontal scanning frequency 15 - 110 kHz
Vertical scanning frequency 48 - 120 Hz
Connection terminals
A
V VIDEO IN / OUT (BNC) 1.0 Vp-p (75-ohm or high impedance)
S VIDEO IN (MINI DIN 4PIN) Y: 1 Vp-p (75-ohm), C: 0.286 Vp-p (75-ohm)
A
UDIO IN (RCA PIN JACK × 2) 0.5 Vrms (high impedance)
PC (HIGH-DENSIT
Y
Mini-D-SUB 15PIN) R,G,B
/
0.7 Vp-p (75-ohm)
HD, VD
/
1.0 - 5.0 Vp-p (high impedance)
A
UDIO IN (M3 JACK) 0.5 Vrms (high impedance)
SERIAL EXTERNAL CONTROL TERMINAL (D-SUB 9PIN) RS-232C COMPATIBLE
ORDER NO. PCZ0509083C2

1 Applicable signals 4
2 Safety Precautions 5
2.1. General Guidelines 5
3 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 6
4 About lead free solder (PbF) 7
5 PCB Structure sheet of GPH8D chassis 8
6 Service Hint 9
7 Disassembly 10
7.1. Removal of the Back Cover 10
7.2. Removal of the HB-Board 10
7.3. Removal of the Slot Block 10
7.4. Removal of the J-Board 10
7.5. Removal of the HX-Board 11
7.6. Removal of the PB-Board 11
7.7. Removal of the D-Board 11
7.8. Removal of the P-Board 12
7.9. Removal of the H3-Board(L, R) 12
7.10. Removal of the SU-Board and the SD-Board 12
7.11. Removal of the SC-Board 13
7.12. Removal of the SS2-Board and the SS3-Board 13
7.13. Removal of the SS-Board 13
7.14. Removal of the C1, C2, C3 and the C4-Board 13
7.15. Removal of the S1-Board 15
7.16. Removal of the Fan 15
7.17. Removal of the Escutcheon 16
7.18. Removal of the V1-Board and the V2-Board 16
7.19. Removal of the Plasma Panel 17
8 Location of Lead Wiring 20
9 Adjustment Procedure 22
9.1. Driver Set-up 22
9.2. Initialization Pulse Adjust 23
9.3. P.C.B. (Printed Circuit Board) exchange 23
9.4. Adjustment Volume Location 24
9.5. Test Point Location 24
10 Service mode 25
10.1. CAT (computer Aided Test) mode 25
10.2. IIC mode structure (following items value is sample data.)
27
11 Alignment 28
11.1. PC / RGB panel white balance 28
11.2. HD / 525ip / 625ip panel white balance 30
12 Trouble shooting guide 32
12.1. Self Check 32
12.2. No Power 33
12.3. No Picture 33
12.4. Local screen failure 34
13 Option Setting 35
14 Circuit Board Layout 37
14.1. P-Board 37
14.2. PB-Board 40
14.3. HB-Board 41
14.4. HX-Board 42
14.5. J-Board 43
14.6. D-Board 45
14.7. C1-Board 47
14.8. C2-Board 48
14.9. C3-Board 49
14.10. C4-Board 50
14.11. SC-Board 51
14.12. SU-Board 54
14.13. SD-Board 55
SPEAKERS (6Ω) 16 W [8 W + 8 W] (10 % THD)
Accessories Supplied
Remote Control Transmitter EUR7636070R or EUR7636090R
Batteries 2 × R6 Size
Fixing bands (TMME203 or TMME187) × 2
Dimensions (
W
×H×D) 1,020 mm × 610 mm × 89 mm
(exclusive of protruding portion)
Mass (weight)
main unit onl
y
approx. 31.5 kg net
with speakers approx. 35.5 kg
Notes:
· Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.
· This equipment complies with the EMC standards listed below. EN55022, EN55024, EN61000-3-2, EN61000-3-3.
CONTENTS
Page Page
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

14.14. SS, SS2 and SS3-Board 56
14.15. H3, S1, V1 and V2-Board 58
15 Block and Schematic Diagram 59
15.1. Schematic Diagram Notes 59
15.2. Main Block Diagram 60
15.3. P-Board Block Diagram 61
15.4. P-Board (1 of 2) Schematic Diagram 62
15.5. P-Board (2 of 2) Schematic Diagram 63
15.6. PB-Board Block and Schematic Diagram 64
15.7. HB-Board Block Diagram 65
15.8. HB-Board (1 of 2) Schematic Diagram 66
15.9. HB-Board (2 of 2) Schematic Diagram 67
15.10. HX-Board Block and Schematic Diagram 68
15.11. J-Board (1 of 2) and H3-Board Block Diagram 69
15.12. J-Board (2 of 2) Block Diagram 70
15.13. J-Board (1 of 4) and H3-Board Schematic Diagram 71
15.14. J-Board (2 of 4) Schematic Diagram 72
15.15. J-Board (3 of 4) Schematic Diagram 73
15.16. J-Board (4 of 4) Schematic Diagram 74
15.17. D-Board (1 of 2) Block Diagram 75
15.18. D-Board (2 of 2) Block Diagram 76
15.19. D-Board (1 of 12) Schematic Diagram 77
15.20. D-Board (2 of 12) Schematic Diagram 78
15.21. D-Board (3 of 12) Schematic Diagram 79
15.22. D-Board (4 of 12) Schematic Diagram 80
15.23. D-Board (5 of 12) Schematic Diagram 81
15.24. D-Board (6 of 12) Schematic Diagram 82
15.25. D-Board (7 of 12) Schematic Diagram 83
15.26. D-Board (8 of 12) Schematic Diagram 84
15.27. D-Board (9 of 12) Schematic Diagram 85
15.28. D-Board (10 of 12) Schematic Diagram 86
15.29. D-Board (11 of 12) Schematic Diagram 87
15.30. D-Board (12 of 12) Schematic Diagram 88
15.31. C1, C2, C3 and C4-Board Block Diagram 89
15.32. C1-Board (1 of 2) Schematic Diagram 90
15.33. C1-Board (2 of 2) Schematic Diagram 91
15.34. C2-Board (1 of 2) Schematic Diagram 92
15.35. C2-Board (2 of 2) Schematic Diagram 93
15.36. C3-Board (1 of 2) Schematic Diagram 94
15.37. C3-Board (2 of 2) Schematic Diagram 95
15.38. C4-Board (1 of 2) Schematic Diagram 96
15.39. C4-Board (2 of 2) Schematic Diagram 97
15.40. SC-Board Block Diagram 98
15.41. SC-Board (1 of 2) Schematic Diagram 99
15.42. SC-Board (2 of 2) Schematic Diagram 100
15.43. SU-Board Block Diagram 101
15.44. SU-Board (1 of 2) Schematic Diagram 102
15.45. SU-Board (2 of 2) Schematic Diagram 103
15.46. SD-Board Block Diagram 104
15.47. SD-Board (1 of 2) Schematic Diagram 105
15.48. SD-Board (2 of 2) Schematic Diagram 106
15.49. SS, SS2 and SS3-Board Block Diagram 107
15.50. SS, SS2 and SS3-Board Schematic Diagram 108
15.51. S1, V1 and V2-Board Block and Schematic Diagram 109
16 Parts Location 111
16.1. Exploded View 111
16.2. Cable relation 113
16.3. Packing summary 114
17 Mechanical Replacement Parts List 116
18 Replacement Parts List 117
18.1. Relpacement Parts List Notes 117
18.2. Electrical Replacement Parts List 118
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

1 Applicable signals
4
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

2.1.1. 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
2.1.2. 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.
2 Safety Precautions
2.1. 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-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

3 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, 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 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-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

4 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).
· 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.
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

5 PCB Structure sheet of GPH8D chassis
Board Name Function Remarks
D Digital Signal Processor,
Format Coverter,
Plasma Ai Processor
1
J Slot Interface (Audio/Video/Sync input Switch),
SYNC processor, Audio processor,
Speaker out amplifier,
DC-DC converter
1
SS Sustain drive 1
SC Scan drive 1
SU Scan out (Upper) 1
SD Scan out (Lower) 1
C1 Data Drive (Upper Right)
C2 Data Drive (Upper Center)
C3 Data Drive (Upper Left)
C4 Data Drive (Lower Left)
C5 Data Drive (Lower Center)
C6 Data Drive (Lower Right)
H3 Speaker terminal
S1 Power switch
SS2 Sustain out (Upper)
SS3 Sustain out (Lower)
V1 LED (stand-by / Power on) & Remote receiver 1
V2 Key switch 1
PB Fan control 1
P Line filter, Power supply 1
HX PC / RS-232C
HB BNC Composite Video
Remarks
1: Recommend PCB´s for initial service for GPH8D chassis.
8
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

6 Service Hint
Note:
· Extension cable kit Slot Board is supplied as service fixtures and tools.
(Parts No. TZSC07040)
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7 Disassembly
· To disassemble P.C.B. , wait for 1 minute after power was
off for discharge from electrolysis capacitors.
· and marks indicate screw positions.
7.1. Removal of the Back Cover
1. Remove the screws (×8 ,×4 ,×6 , ×10 ) and then
remove the Back Cover.
7.2. Removal of the HB-Board
1. Remove the 4 screws(A) and then remove the HB Terminal
Block.
2. Remove the 4 screws(B).
3. Remove the 2 screws(C) and then remove the HB-Board.
7.3. Removal of the Slot Block
1. Disconnect the couplers (J1, J2, J3, J4, J5, J6, J7, J8, J10,
J15).
2. Remove the 4 screws and then remove the Slot Block.
7.4. Removal of the J-Board
1. Remove the HA Terminal Block and the HB Terminal Block.
(Reference to Removal of the HA-Board and the HB-Board)
2. Remove the Slot Block.
(Reference to Removal of the Slot Block)
3. Remove the 8 screws and then remove the J-Board.
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.5. Removal of the HX-Board
1. Remove the HA Terminal Block and the HB Terminal Block.
(Reference to Removal of the HA-Board and the HB-Board)
2. Remove the Slot Block.
(Reference to Removal of the Slot Block)
3. Remove the J-Board.
(Reference to Removal of the J-Board)
4. Remove the 6 screws and then remove the Slot Case.
5. Remove the 4 Hexagonal-Head screws and the 1 screw
and then remove the HX-Board.
7.6. Removal of the PB-Board
1. Disconnect the couplers(PB30, PB31, PB33, PB35)
2. Remove the 1 screw and then remove the PB-Board.
7.7. Removal of the D-Board
1. Disconnect the couplers(PB30, PB31, PB33, PB35).
2. Remove the 3 screws and then remove the PB-Board
Block.
3. Disconnect the couplers(D1, D3, D5, D20, D25).
4. Remove the Flexible Cable from the couplers (D31, D32,
D33, D34).
5. Remove the 3 screws and then remove the D-Board.
11
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.8. Removal of the P-Board
1. Remove the 4 screws and then remove the Cover.
2. Disconnect the couplers(P2, P5, P9, P10, P11, P12, P23,
P25, P30).
3. Remove the 4 screws and then remove the P-Board.
7.9. Removal of the H3-Board(L, R)
1. Remove the each 1 screw and then remove the Speaker
Terminal Block(L, R).
2. Disconnect the coupler(H37).
3. Remove the 3 screws(G) and then remove the H3-Board.
7.10. Removal of the SU-Board and
the SD-Board
1. Remove the Speaker Terminal Block(R).
(Reference to Removal of the H3-Board(L, R))
2. Remove the each 2 screws.
3. Slide the SU-Board and the SD-Board to the left.
4. Disconnect the couplers(SU45, SD46).
5. Remove the Flexible Cable from the couplers(SU1, SU2,
SU3, SU4) and then remove the SU-Board.
6. Remove the Flexible Cable from the couplers(SD1, SD2,
SD3, SD4) and then remove the SD-Board.
12
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.11. Removal of the SC-Board
1. Remove the Speaker Terminal Block(R).
(Reference to Removal of the H3-Board(L, R))
2. Remove the each 2 screws.
3. Slide the SU-Board and the SD-Board to the left.
(Reference to Removal of the SU-Board and the SD-Board)
4. Disconnect the couplers(SC2, SC20, SC23, SC45, SC46).
5. Remove the 6 screws and then remove the SC-Board.
7.12. Removal of the SS2-Board and
the SS3-Board
1. Disconnect the coupler(SS23).
2. Remove the Flexible Cable from the coupler(SS55).
3. Disconnect the coupler(SS22).
4. Remove the Flexible Cable from the coupler(SS56).
5. Remove the each 2 screws and then remove the SS2-
Board and the SS3-Board.
7.13. Removal of the SS-Board
1. Disconnect the couplers(SS11, SS12, SS22, SS23, SS24,
SS32, SS34).
2. Remove the Flexible Cable from the couplers(SS52, SS53)
3. Remove the 6 screws and then remove the SS-Board.
7.14. Removal of the C1, C2, C3 and
the C4-Board
1. Remove the Slot Block.
(Reference to Removal of the Slot Block)
2. Remove the Speaker Terminal Block(L, R).
(Reference to Removal of the H3-Board(L, R))
3. Remove the each 3 screws and then remove the Fan
Blocks.
4. Remove the each 3 screws and then remove the Stand
Blocks.
13
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.14.1. Removal of the C1-Board
1. Remove the Flexible Cable from the coupler(C11) .
2. Disconnect the coupler(C12) .
3. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CA1, CA2, CA3, CA4).
4. Remove the each 3 screws and then remove the C1-Board.
7.14.2. Removal of the C2-Board
1. Remove the Flexible Cable from the coupler(C21).
2. Disconnect the couplers(C22, C24).
3. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CA5, CA6, CA7, CA8, C31).
4. Remove the 3 screws and then remove the C2-Board.
7.14.3. Removal of the C3-Board
1. Remove the Flexible Cable from the coupler(C31).
2. Disconnect the couplers(C32, C33).
3. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CB5, CB6, CB7, CB8, C31).
4. Remove the 3 screws and then remove the C3-Board.
7.14.4. Removal of the C4-Board
1. Remove the Flexible Cable from the coupler(C41).
2. Disconnect the coupler(C43).
3. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CB1, CB2, CB3, CB4, C41).
4. Remove the 3 screws and then remove the C4-Board.
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.15. Removal of the S1-Board
1. Disconnect the coupler(SS34).
2. Remove the 2 screws(H) and then remove the S1-Board
Block.
3. Disconnect the coupler(S34).
4. Remove the 1 screw(J) and then remove the S1-Board.
7.16. Removal of the Fan
1. Disconnect the couplers(PB31, PB33, PB35).
2. Remove the each 3 screws and then remove the 3 Fan
Blocks.
3. Remove the each 2 screws.
4. Remove the each 2 Fan brackets and the each 4 Cushion
s(rubber) and then remove the 3 Fans..
5. Reassemble the Fans in reverse order.
6. Stick the Sponge (Fan center) on the central part of the
Fan.
7. Stick the Cushion (Fan) around the Fan.
Note:
The Sponge (Fan center) and the Cushion (Fan) are
unsuitable to reuse.
Please use a new one at the time of Fan exchange.
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.17. Removal of the Escutcheon
1. Remove the S1-Board Block.
(Reference to Removal of the S1-Board)
2. Disconnect the couplers(J2, J15).
3. Remove the 2 screws of the Escutcheon.
4. Pull the bottom of the Escutcheon in the direction of the
arrow1 and then lift up the Escutcheon to remove in the
direction of the arrow2.
7.18. Removal of the V1-Board and
the V2-Board
1. Operate from procedure 1 to procedure 3 of 8.17.
(Reference to Removal of the Escutcheon)
2. Remove the 2 screws(K) and then remove the Fixed Angle.
3. Remove the 1 screw(M).
4. Remove the operation button from the V2-Board.
5. Disconnect the coupler(V15) and then remove the V2-
Board.
6. Disconnect the coupler(V2) and then remove the V1-Board.
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

7.19. Removal of the Plasma Panel
1. Disconnect the couplers(PB31, PB33, PB35).
2. Remove the each 3 screws and then remove the Fan
Blocks.
3. Remove the each 3 screws and then remove the Stand
Block(L, R).
4. Disconnect the couplers(J1, J2, J3, J4, J5, J6, J7, J8, J10,
J15).
5. Remove the 4 screws and then remove the Slot Block.
6. Disconnect the coupler(PB30).
7. Remove the 3 screws and then remove the PB-Board
Block.
8. Disconnect the couplers(D20, D25).
9. Remove the Flexible Cable from the couplers(D31, D32,
D33, D34).
10. Remove the 4 screws and then remove the D-Board.
11. Disconnect the couplers(P2, P9, P11, P12, P23) .
12. Remove the 4 screws and then remove the Cover.
13. Remove the 4 screws and then remove the P-Board.
14. Remove the each 1 screw and then remove the Speaker
Terminal Block(L, R).
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

15. Disconnect the couplers(SC45, SC46).
16. Remove the each 2 screws and then slide the SU-Board
and the SD-Board to the left.
17. Remove the Flexible Cable from the couplers(SU1, SU2,
SU3, SU4) and then remove the SU-Board.
18. Remove the Flexible Cable from the couplers(SD1, SD2,
SD3, SD4) and then remove the SD-Board.
19. Remove the 6 screws and then remove the SC-Board.
20. Disconnect the coupler(SS23).
21. Remove the Flexible Cable from the coupler(SS55).
22. Remove the 2 screws and then remove the SS2-Board .
23. Disconnect the coupler(SS22).
24. Remove the Flexible Cable from the coupler(SS56).
25. Remove the 2 screws and then remove the SS3-Board.
26. Disconnect the couplers(SS24, SS32, SS34).
27. Remove the Flexible Cable from the couplers(SS52, SS53).
28. Remove the 6 screws and then remove the SS-Board.
29. Disconnect the coupler(C12).
30. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CA1, CA2, CA3, CA4).
31. Remove the 3 screws and then remove the C1-Board.
32. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CA5, CA6, CA7, CA8).
33. Remove the 3 screws and then remove the C2-Board.
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TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

34. Disconnect the coupler(C33).
35. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CB5, CB6, CB7, CB8, C31).
36. Remove the 3 screws and then remove the C3-Board.
37. Remove the 8 screws and then remove the Flexible Cable
from the couplers(CB1, CB2, CB3, CB4, C41).
38. Remove the 3 screws and then remove the C4-Board.
39. Remove the 2 screws and then remove the S1-Board Block.
40. Remove the 2 screws and then remove the AC Inlet Block.
41. Remove the 2 screws and then remove the Shield Sheet.
42. Pull out the Flexible Cable.
43. Remove the 3 screws and then remove the Cable Holder.
44. Remove the 2 screws of the Escutcheon.
45. Lift up the bottom of the Plasma Panel in the direction of the
arrow1 and pull the Plasma Panel in the direction of the
arrow2 and then remove the Plasma Panel.
19
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES

8 Location of Lead Wiring
20
TH-42PHD8BK / TH-42PHD8BS / TH-42PHD8EK / TH-42PHD8ES