Panasonic TH-50PM50U User manual

© 2005 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
TH-50PM50U
GP8DU Chassis
High Definition Plasma Display
Specifications
Power Source AC 120 V, 50/60 Hz
Power Consumption
Maximum 515 W
Stand-by condition 0.6 W
Plasma Display panel Drive method : AC type 50-inch , 16 : 9 aspect ratio
Screen Size (W × H × diagonal) 43 35/64 ’’ (1106 mm) × 24 31/64 ’’ (622 mm) × 49 61/64 ’’(1269 mm)
Dimensions (W × H × D) 49 31/64 ’’ (1257 mm) × 32 3/64 ’’ (814 mm) × 3 51/64 ’’ (96.5 mm)
Mass (Weight) 98.11lb. (44.5kg)
Sound
Speaker 423/32 ’’ (120 mm) × 2 23/64 ’’ (60 mm) × 2 pcs, 6W
Audio Output 16 W [ 8 W + 8 W ] ( 10 % THD )
FEATURES 3D Y/C FILTER HDMI
Accessories Supplied Remote control: EUR646539
F-type antenna adapter (5C-2V × 1)
AA Battery × 2
Pedestal
AC Cord
Cable clamper × 2
Operating Conditions Temperature : 32 °F - 104 °F (0 ° - 40 °C)
Humidity : 20 % - 80 % (non-condensing)
Connection Terminals AV INPUT 1- 2
V
IDEO 1.0 Vp-p (75 W)
(Phono Jack Type)
S-VIDEO Y : 1.0 Vp-p (75 W), C : 0.286 Vp-p (75 W)
(Mini DIN 4-pin)
A
UDIO L-R 0.5 Vrms
(Phono Jack Type × 2)
AV PROG. OUT
V
IDEO 1.0 Vp-p (75 W)
(Phono Jack Type)
A
UDIO L-R 0.5 Vrms
ORDERNO.MTNC050951C1
B19Canada: B05

1 Applicable signals 4
2 Safety Precautions 4
2.1. General Guidelines 4
3 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 5
4 About lead free solder (PbF) 6
5 Service Hint 7
6 Plasma panel replacement method 8
6.1. Remove the Back cover. 8
6.2. Remove the P-Board. 8
6.3. Remove the PB-Board 8
6.4. Remove the D-Board 8
6.5. Remove the rear terminal cover 9
6.6. Remove the metal frame 9
6.7. Remove the DV-Board 9
6.8. Remove the DG-Board 9
6.9. Remove the H-Board 10
6.10. Remove the PA-Board 10
6.11. Remove the Z-Board 10
6.12. Remove the SU-Board 10
6.13. Remove the SD-Board 11
6.14. Remove the SC-Board 11
6.15. Remove the SS2-Board 12
6.16. Remove the SS3-Board 12
6.17. Remove the SS-Board 12
6.18. Remove the Fan 12
6.19. Remove the C1-Board 13
6.20. Remove the C2-Board 13
6.21. Remove the C3-Board 13
6.22. Remove the Speaker L, R 13
6.23. Remove the stand brackets. 14
6.24. Remove the C4-Board 14
6.25. Remove the C5-Board 14
6.26. Remove the C6-Board 14
6.27. Remove the K-Board 15
6.28. Remove the S-Board 15
6.29. Remove the Plasma panel section from the Front frame
(glass) 15
6.30. Replace the plasma panel (finished). 16
7 Location of Lead Wiring 17
7.1. Lead of Wiring (1) 17
7.2. Lead of Wiring (2) 18
7.3. Lead of Wiring (3) 19
7.4. Lead of Wiring (4) 20
8 Self-check Function 21
8.1. How to access 21
8.2. Power LED Blinking timing chart 22
8.3. No Power 23
8.4. No Picture 24
8.5. Local screen failure 25
9 Serviceman Mode 26
9.1. How to enter into Serviceman Mode 26
9.2. Cancellation 26
9.3. Contents of adjustment mode 26
9.4. Option 27
10 Adjustment Procedure 28
10.1. Driver Set-up 28
10.2. Initialization Pulse Adjust 29
10.3. P.C.B. (Printed Circuit Board) exchange 30
10.4. Adjustment Volume Location 30
10.5. Test Point Location 30
11 Adjustment 31
11.1. NTSC white balance adjustment 31
11.2. HD white balance adjustment 32
11.3. Sub bright adjustment 33
11.4. ABL operation level adjustment 33
12 Conductor View 35
12.1. P-Board 35
(Phono Jack Type × 2)
COMPONENT VIDEO Y1.0 Vp-p (including synchronization)
INPUT1-2 PB / PR ±0.35Vp-p
A
UDIO L-R 0.5 Vrms
(Phono Jack Type × 2)
HDMI HDMI type A Connector
A
UDIO L-R 0.5 Vrms
(Phono Jack Type × 2)
Note:
Design and Specifications are subject change without notice.
Weight and Dimensions shown are approximate.
CONTENTS
Page Page
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12.2. PA-Board 38
12.3. PB-Board 39
12.4. H-Board 40
12.5. DV-Board 42
12.6. DG-Board 43
12.7. Z-Board 45
12.8. D-Board 46
12.9. C1-Board 49
12.10. C2-Board 50
12.11. C3-Board 51
12.12. C4-Board 52
12.13. C5-Board 53
12.14. C6-Board 54
12.15. SC-Board 55
12.16. SU-Board 58
12.17. SD-Board 59
12.18. SS, SS2 and SS3-Board 60
12.19. K and S-Board 62
13 Block and Schematic Diagram 63
13.1. Schematic Diagram Notes 63
13.2. Main Block Diagram 64
13.3. P-Board Block Diagram 65
13.4. P-Board (1 of 2) Schematic Diagram 66
13.5. P-Board (2 of 2) Schematic Diagram 67
13.6. PA and PB Board Block Diagram 68
13.7. PA-Board Schematic Diagram 69
13.8. PB-Board Schematic Diagram 70
13.9. H, K, S and Z-Board Block Diagram 71
13.10. H-Board (1 of 2) Schematic Diagram 72
13.11. H-Board (2 of 2) Schematic Diagram 73
13.12. Z-Board Schematic Diagram 74
13.13. K and S-Board Schematic Diagram 75
13.14. DV-Board Block Diagram 76
13.15. DV-Board Schematic Diagram 77
13.16. DG-Board (1 of 2) Block Diagram 78
13.17. DG-Board (2 of 2) Block Diagram 79
13.18. DG-Board (1 of 6) Schematic Diagram 80
13.19. DG-Board (2 of 6) Schematic Diagram 81
13.20. DG-Board (3 of 6) Schematic Diagram 82
13.21. DG-Board (4 of 6) Schematic Diagram 83
13.22. DG-Board (5 of 6) Schematic Diagram 84
13.23. DG-Board (6 of 6) Schematic Diagram 85
13.24. D-Board Block Diagram 86
13.25. D-Board (1 of 6) Schematic Diagram 87
13.26. D-Board (2 of 6) Schematic Diagram 88
13.27. D-Board (3 of 6) Schematic Diagram 89
13.28. D-Board (4 of 6) Schematic Diagram 90
13.29. D-Board (5 of 6) Schematic Diagram 91
13.30. D-Board (6 of 6) Schematic Diagram 92
13.31. C1, C2,C5 and C6-Board Block Diagram 93
13.32. C3 and C4-Board Block Diagram 94
13.33. C1-Board (1 of 2) Schematic Diagram 95
13.34. C1-Board (2 of 2) Schematic Diagram 96
13.35. C2-Board (1 of 2) Schematic Diagram 97
13.36. C2-Board (2 of 2) Schematic Diagram 98
13.37. C3-Board (1 of 2) Schematic Diagram 99
13.38. C3-Board (2 of 2) Schematic Diagram 100
13.39. C4-Board (1 of 2) Schematic Diagram 101
13.40. C4-Board (2 of 2) Schematic Diagram 102
13.41. C5-Board (1 of 2) Schematic Diagram 103
13.42. C5-Board (2 of 2) Schematic Diagram 104
13.43. C6-Board (1 of 2) Schematic Diagram 105
13.44. C6-Board (2 of 2) Schematic Diagram 106
13.45. SC-Board Block Diagram 107
13.46. SC-Board (1 of 2) Schematic Diagram 108
13.47. SC-Board (2 of 2) Schematic Diagram 109
13.48. SU-Board Block Diagram 110
13.49. SU-Board (1 of 2) Schematic Diagram 111
13.50. SU-Board (2 of 2) Schematic Diagram 112
13.51. SD-Board Block Diagram 113
13.52. SD-Board (1 of 2) Schematic Diagram 114
13.53. SD-Board (2 of 2) Schematic Diagram 115
13.54. SS, SS2 and SS3-Board Block Diagram 116
13.55. SS-Board (1 of 2), SS2 and SS3 Schematic Diagram 117
13.56. SS-Board (2 of 2) Schematic Diagram 118
14 Parts Location & Mechanical Replacement Parts List 119
14.1. Parts Location 119
14.2. Pcaking Exploded Views (1) 120
14.3. Pcaking Exploded Views (2) 121
14.4. Pcaking Exploded Views (3) 122
14.5. Mechanical Replacement Parts List 123
15 Electrical Replacement Parts List 125
15.1. Replacement Parts List Notes 125
15.2. Electrical Replacement Parts List 126
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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
1MWand 5.2MW.
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 1.5kW, 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 Applicable signals
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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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 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).
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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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5 Service Hint
Board Name Function Board Name Function
PPower Supply C1 Data Driver (Up Right)
PA DC-DC Converter, Power SOS C2 Data Driver (Up Center)
PB Audio Power, Fan Control C3 Data Driver (Up Left)
HAV Terminal, AV Switch C4 Data Driver (Down Left)
DT ATSC Interface C5 Data Driver (Down Center)
DV HDMI Interface
None serviceable.
DV-Board should be exchanged for service.
C6 Data Driver (Down Right)
SC Scan Drive
SU Scan out (Up)
DG Digital Signal Processor SD Scan out (Down)
ZSpeaker out, Audio AMP SS Sustain Drive
DFormat Converter, Plasma AI Processor SS2 Sustain Connector (Up)
SS3 Sustain Connector (Down)
KRemote receiver, Keyscan
SPower Switch
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6.1. Remove the Back cover.
1.See Service hint (Section 5).
6.2. Remove the P-Board.
Caution:
To remove P.C.B., wait 1 minute after power was off for
discharge from electrolisis capacitors.
1.Disconnect the couplers (P2, P5, P9, P10, P11, P12, P23,
P25 and P30).
2.Remove the screws (×5 ) and remove the P-Board.
6.3. Remove the PB-Board
1.Unlock the cable clampers to free the cable.
2.Disconnect the couplers (PB5, PB7, PB30, PB31, PB32,
PB33 and PB34).
3.Remove the screws (×3 ) and remove the PB-Board
metal frame.
4.Remove the screws (× 4 ) and remove the PB-Board.
6.4. Remove the D-Board
1.Remove the PB-Board.
2.Disconnect the couplers (D3, D5, D20 and D25) and
3.Disconnect the flexible cables (D31, D32, D33 and D34).
4.Remove the screws (×4 ) and remove the D-Board.
6 Plasma panel replacement method
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6.5. Remove the rear terminal
cover
1.Remove the screws (×4 ).
2.Remove the screws (×3 ).
3.Remove the screws (×2 ).
4.Remove the screw (×1 ).
5.Remove the rear terminal cover.
6.6. Remove the metal frame
1.Unlock the cable clampers to free the cable.
2.Disconnect the couplers (D3, D5, H7, P10 and PB7) and
relay connector (SP-L and SP-R).
3.Remove the screws (×4 ) remove the metal frame.
6.7. Remove the DV-Board
1.Unlock the cable clampers to free the cable.
2.Remove the DV-Board unit.
(Be careful the couplers (DV15) when remove the DV-
Board unit.)
3.Remove the screws (×1 ) and remove the DV-Board.
6.8. Remove the DG-Board
1.Unlock the cable clampers to free the cable.
2.Disconnect the couplers (DG3 and DG5).
3.Disconnect the flexible cables (DG1, DG2 and DG20).
4.Remove the screws (×2 ) and remove the DG-Board.
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6.9. Remove the H-Board
1.Unlock the cable clampers to free the cable.
2.Disconnect the coupler (H7).
3.Disconnect the flexible cables (H1, H2, H30 and H50).
4.Remove the screws (×4 ) and remove the H-Board.
6.10. Remove the PA-Board
1.Unlock the cable clampers to free the cable.
2.Disconnect the couplers (PA7 and PA10).
3.Disconnect the flexible cables (PA20 and PA30).
4.Remove the screws (×4 ) and remove the PA-Board.
6.11. Remove the Z-Board
1.Unlock the cable clampers to free the cable.
2.Disconnect the coupler (Z2).
3.Disconnect the flexible cable (Z50).
4.Remove the screws (×2 ) and remove the Z-Board.
6.12. Remove the SU-Board
1.Remove the screws (×3 ).
2.Slide the SU-Board to the left to disconnect from a coupler
(SC41 - SU41) on the SC-Board and remove a coupler
(SU45 or SC45).
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3.Remove the flexible cables (SU1, SU2, SU3 and SU4)
connected to the SU-Board, and remove the SU-Board.
6.13. Remove the SD-Board
1.Remove the screws (×3 ).
2.Slide the SD-Board to the left to disconnect from a coupler
(SC42 - SD42) on the SC-Board and remove a coupler
(SD46 or SC46).
3.Remove the flexible cables (SD1, SD2, SD3 and SD4)
connected to the SD-Board, and remove the SD-Board.
6.14. Remove the SC-Board
1.Disconnect the couplers (SC2, SC20 and SC23)
2.Remove the screws (×9 ) and remove the SC-Board.
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6.15. Remove the SS2-Board
1.Disconnect the coupler (SS23) and disconnect the flexible
cable (SS55).
2.Remove the screws (×2 ) and remove the SS2-Board.
6.16. Remove the SS3-Board
1.Disconnect the coupler (SS22) and disconnect the flexible
cable (SS56).
2.Remove the screws (×2 ) and remove the SS3-Board.
6.17. Remove the SS-Board
1.Remove the SS2-Board and SS3-Board.
2.Disconnect the couplers (SS11, SS12, SS34, SS35, SS42
and SS44).
3.Disconnect the flexible cables (SS51, SS52, SS53 and
SS54).
4.Remove the screws (×7 ) and remove the SS-Board.
6.18. Remove the Fan
1.Remove the screws (×3 each) remove the fan and
disconnect the relay coupler.
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6.19. Remove the C1-Board
1.Remove the fan.
2.Remove the flexible cables holder fastening screws (×6
) and disconnect the flexible cables (CA1, CA2 and
CA3).
3.Disconnect the flexible cable (C10) and disconnect the
coupler (C11).
4.Remove the screw (×5 ) and remove the C1-Board.
6.20. Remove the C2-Board
1.Remove the fan.
2.Remove the flexible cables holder fastening screws (×8
) and disconnect the flexible cables (CA4, CA5, CA6
and CA7).
3.Disconnect the Flexible cables (C20, C21, C24 and C25)
and disconnect the couplers (C22 and C23).
4.Remove the screws (×5 ) and remove the C2-Board.
6.21. Remove the C3-Board
1.Remove the fan.
2.Remove the flexible cables holder fastening screws (×8
) and disconnect the flexible cables (CA8, CA9, CA10
and CA11).
3.Disconnect the flexible cable (C31) and disconnect the
couplers (C33 and C35).
4.Remove the screws (×5 ) and remove the C3-Board.
6.22. Remove the Speaker L, R
1.Remove the screw (×8 ) and disconnect the relay
connector L, R.
2.Remove the Speaker L, R.
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6.23. Remove the stand brackets.
1.Remove the plasma panel section from the servicing stand
and lay on a flat surface such as a table (covered), with the
plasma panel surface facing downward.
Spread a soft cloth or similar on the table for protection, so
the panel surface is not scratched.
2.Remove the stand bracket (left, right) fastening screws (×4
each) and remove the stand brackets (left, right).
6.24. Remove the C4-Board
1.Remove the flexible cables holder fastening screws (×8
) and disconnct the flexible cables (CB8, CB9, CB10
and CB11).
2.Release the speaker cables from clampers.
3.Disconnect the flexible cables (C41) and disconnect the
couplers (C42, C43 and C44).
4.Remove the screws (×5 ) and remove the C4-Board.
6.25. Remove the C5-Board
1.Remove the flexible cables holder fastening screws (×8
) and disconnect hte flexible cables (CB4, CB5, CB6
and CB7).
2.Release the speaker cables from clampers.
3.Disconnect the flexible cables (C50, C51, C54 and C55)
and disconnect the couplers (C52 and C53).
4.Remove the screws (×5 ) and remove the C5-Board.
6.26. Remove the C6-Board
1.Remove the flexible cables holder fastening screws (×6
) and disconnect the flexible cables (CB1, CB2 and
CB3).
2.Release the speaker cables from clampers.
3.Disconnect the flexible cables (C60) and disconnect the
coupler (C61).
4.Remove the screws (×5 ) and remove the C6-Board.
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6.27. Remove the K-Board
1.Unlock the cable clampers to free the cable.
2.Disconnect the couplers (H7 and SS34).
3.Remove the screws (×3 ) and remove the K-Board.
6.28. Remove the S-Board
1.Remove the screw (×2 ) and remove the S-Board unit.
2.Unlock the cable clampers to free the cable.
3.Disconnect the couplers (S1 and S2).
4.Remove the screws (×2 ) and remove the S-Board.
6.29. Remove the Plasma panel
section from the Front frame
(glass)
1.Remove the front frame and the plasma panel fastening
screw (×8 ).
2.Remove the front frame and the stand brackets fastening
screw (×6 ).
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3.For leaving the plasma panel from the front frame, pull the
bottom of the front frame forward, lift, and remove.
6.30. Replace the plasma panel
(finished).
1.Place the new plasma panel (finished) on the flat surface of
the table (covered by a soft cloth), with the plasma panel
surface facing downward.
2.Attach the C1, C2, C3, C4 and C5-Board and the C6-Board,
connect the flexible cables (×7) from the Plasma panel to
the C1, C2, C3, C4 and C5-Board and C2-Board, and fix
the flexible cable holders.
3.Attach the Hooks (left, right) and fit the stand brackets (left,
right) to the new plasma panel.
4.Place the plasma panel section on the servicing stand.
5.Attach the front frame and the each P.C.Board and so on,
to the new plasma panel.
* When fitting the front frame, be careful not to allow
any debris, dust or handling residues to remain
between the front glass and plasma panel.
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7 Location of Lead Wiring
7.1. Lead of Wiring (1)
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7.2. Lead of Wiring (2)
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7.3. Lead of Wiring (3)
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7.4. Lead of Wiring (4)
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