Panasonic TH-50PH12U Service manual

Order Number MTNC090649CE

B34 Canada: D10

High Definition Plasma Display

Model No. TH-50PH12U

GPH12D Chassis

TABLE OF CONTENTS

1 Safety Precautions ----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3

2 Warning -------------------------------------------------------------- 4

2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatically Sensitive (ES) Devices---------- 4

2.2. About lead free solder (PbF)---------------------------- 5

3 Service Navigation ----------------------------------------------- 6

3.1. Service Hint ------------------------------------------------- 6

3.2. Applicable signals ----------------------------------------- 7

4 Specifications ----------------------------------------------------- 8
5 Operating Instructions------------------------------------------ 9
6 Service Mode ----------------------------------------------------- 11

6.1. CAT (Computer Aided Test) mode -------------------11

6.2. IIC mode structure (following items value is
sample data) -----------------------------------------------14

7 Troubleshooting Guide----------------------------------------15

7.1. Self Check --------------------------------------------------15

7.2. No Power ---------------------------------------------------17

7.3. No Picture --------------------------------------------------17

PAG E PAG E

7.4. Local screen failure -------------------------------------- 18

8 Service Fixture & Tools --------------------------------------- 19

8.1. SC jig -------------------------------------------------------- 19

9 Disassembly and Assembly Instructions --------------- 20

9.1. Removal of Rear Cover -------------------------------- 20

9.2. Removal of HHH-Board -------------------------------- 20

9.3. Removal of HA-Board----------------------------------- 20

9.4. Removal of Slot Block ---------------------------------- 20

9.5. Removal of HX-Board----------------------------------- 20

9.6. Removal of DS-Board----------------------------------- 21

9.7. Removal of DN-Board ---------------------------------- 21

9.8. Removal of D-Board------------------------------------- 21

9.9. Removal of P-Board ------------------------------------- 22

9.10. Removal of PF-Board ----------------------------------- 22

9.11. Removal of Speaker Terminal Block (L, R) -------- 22

9.12. Removal of SU-Board and SD-Board--------------- 22

9.13. Removal of SC-Board----------------------------------- 23

9.14. Removal of SS2-Board --------------------------------- 23

9.15. Removal of SS-Board----------------------------------- 23

© Panasonic Corporation 2009
Unauthorized copying and distribution is a violation
of law.

TH-50PH12U

9.16. Removal of C1-Board ----------------------------------- 24

9.17. Removal of C2-Board ----------------------------------- 24

9.18. Removal of C3-Board ----------------------------------- 24

9.19. Removal of S1-Board ----------------------------------- 25

9.20. Removal of Fan ------------------------------------------- 25

9.21. Removal of Front Glass, V1, V2-Board and
Cabinet Assy ---------------------------------------------- 25

9.22. Removal of Plasma Display Panel------------------- 27

10 Measurements and Adjustments -------------------------- 31

10.1. Adjustment Procedure ---------------------------------- 31

10.2. Adjustment ------------------------------------------------- 34

11 Block Diagram --------------------------------------------------- 39

11.1. Main Block Diagram ------------------------------------- 39

11.2. Block (1 of 6) Diagram ---------------------------------- 40

11.3. Block (2 of 6) Diagram ---------------------------------- 41

11.4. Block (3 of 6) Diagram ---------------------------------- 42

11.5. Block (4 of 6) Diagram ---------------------------------- 43

11.6. Block (5 of 6) Diagram ---------------------------------- 44

11.7. Block (6 of 6) Diagram ---------------------------------- 45

12 Wiring Connection Diagram --------------------------------- 47

12.1. Wiring (1) --------------------------------------------------- 47

12.2. Wiring (2) --------------------------------------------------- 49

13 Schematic Diagram--------------------------------------------- 51

13.1. Schematic Diagram Notes ----------------------------- 51

13.2. PF-Board Schematic Diagram ------------------------ 52

13.3. P-Board (1 of 2) Schematic Diagram --------------- 53

13.4. P-Board (2 of 2) Schematic Diagram --------------- 54

13.5. V1, V2 and S1-Board Schematic Diagram -------- 55

13.6. HA-Board Schematic Diagram------------------------ 56

13.7. HX-Board Schematic Diagram------------------------ 57

13.8. HHH-Board (1 of 4) Schematic Diagram ----------- 58

13.9. HHH-Board (2 of 4) Schematic Diagram ----------- 59

13.10. HHH-Board (3 of 4) Schematic Diagram ----------- 60

13.11. HHH-Board (4 of 4) Schematic Diagram ----------- 61

13.12. DS-Board (1 of 6) Schematic Diagram ------------- 62

13.13. DS-Board (2 of 6) Schematic Diagram ------------- 63

13.14. DS-Board (3 of 6) Schematic Diagram ------------- 64

13.15. DS-Board (4 of 6) Schematic Diagram ------------- 65

13.16. DS-Board (5 of 6) Schematic Diagram ------------- 66

13.17. DS-Board (6 of 6) Schematic Diagram ------------- 67

13.18. DN-Board (1 of 7) Schematic Diagram ------------- 68

13.19. DN-Board (2 of 7) Schematic Diagram ------------- 69

13.20. DN-Board (3 of 7) Schematic Diagram ------------- 70

13.21. DN-Board (4 of 7) Schematic Diagram ------------- 71

13.22. DN-Board (5 of 7) Schematic Diagram ------------- 72

13.23. DN-Board (6 of 7) Schematic Diagram ------------- 73

13.24. DN-Board (7 of 7) Schematic Diagram ------------- 74

13.25. D-Board (1 of 4) Schematic Diagram --------------- 75

13.26. D-Board (2 of 4) Schematic Diagram --------------- 76

13.27. D-Board (3 of 4) Schematic Diagram --------------- 77

13.28. D-Board (4 of 4) Schematic Diagram --------------- 78

13.29. C1-Board (1 of 2) Schematic Diagram-------------- 79

13.30. C1-Board (2 of 2) Schematic Diagram-------------- 80

13.31. C2-Board (1 of 2) Schematic Diagram-------------- 81

13.32. C2-Board (2 of 2) Schematic Diagram-------------- 82

13.33. C3-Board (1 of 2) Schematic Diagram-------------- 83

13.34. C3-Board (2 of 2) Schematic Diagram-------------- 84

13.35. SC-Board (1 of 3) Schematic Diagram ------------- 85

13.36. SC-Board (2 of 3) Schematic Diagram ------------- 86

13.37. SC-Board (3 of 3) Schematic Diagram ------------- 87

13.38. SS-Board (1 of 2) Schematic Diagram ------------- 88

13.39. SS-Board (2 of 2) and SS2-Board Schematic
Diagram ---------------------------------------------------- 89

14 Printed Circuit Board------------------------------------------ 90

14.1. PF-Board--------------------------------------------------- 90

14.2. P-Board ---------------------------------------------------- 91

14.3. HA-Board -------------------------------------------------- 94

14.4. HX-Board -------------------------------------------------- 95

14.5. HHH-Board ------------------------------------------------ 96

14.6. V1, V2 and S1-Board ----------------------------------- 97

14.7. SS2 and H3-Board -------------------------------------- 98

14.8. DS-Board -------------------------------------------------- 99

14.9. DN-Board -------------------------------------------------100

14.10. D-Board --------------------------------------------------- 102

14.11. C1-Board-------------------------------------------------- 103

14.12. C2-Board-------------------------------------------------- 104

14.13. C3-Board-------------------------------------------------- 105

14.14. SC-Board ------------------------------------------------- 106

14.15. SS-Board ------------------------------------------------- 108

15 Exploded View and Replacement Parts List---------- 111

15.1. Exploded View and Mechanical Replacement
Parts List -------------------------------------------------- 111

15.2. Electrical Replacement Parts List ------------------ 111

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TH-50PH12U

1 Safety Precautions

1.1. General Guidelines

1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.

2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the
wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.

3. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight
out.

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.

1.1.1. 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 1Mohm and 5.2Mohm.
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 1.5kohm, 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.

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2 Warning

2.1. Prevention of Electrostatic 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 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 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 ham less 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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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 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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3 Service Navigation

3.1. Service Hint

Board Name Function Board Name Function

DN Digital Signal Processor, Microcomputer SS Sustain drive

D Format Converter, Plasma AI Processor

Sub-Field Processor

DS Slot Interface (Audio / Video / Sync Input Switch),

Sync Processor, Audio Processor,
Speaker Out Amplifier, DC-DC Converter

SC Scan drive V1 Remote receiver, LED-G, R
SU Scan out (Upper)

Non serviceable.
SU-Board should be exchanged for service.

SD Scan out (Lower)

Non serviceable.
SD-Board should be exchanged for service.

SS2 Sustain out

C1 Data drive (Right)
C2 Data drive (Center)
C3 Data drive (Left)
S1 Power switch

V2 Key switch

P Power supply
PF Power supply and line filter
H3 Speaker terminal
HX PC / RS-232C_Input terminal
HA Component Video terminal (BNC)

HHH Dual HDMI terminal

6

3.2. Applicable signals

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4 Specifications

Power Source 110 - 127 V AC, 50/60Hz
Power Consumption

Power on 465 W
Stand-by condition Save OFF 1.2 W, Save ON 0.5 W
Power off condition 0.2 W

Plasma Display panel Drive method: AC type 50-inch,

16:9 aspect ratio

Screen size 43.5" (1,106 mm) (W) × 24.4" (622 mm) (H) × 49.9" (1,269 mm) (diagonal)

(No. of pixels) 1,049,088 (1,366 (W) × 768 (H) [4,098 × 768 dots]

Operating condition

Temperature 32 °F - 104 °F (0 °C - 40 °C)
Humidity 20 % - 80 %

Applicable signals

Scanning format

PC signals VGA, SVGA, XGA

Connection terminals

HDMI A-B TYPE A Connector × 2
COMPONENT / RGB IN Y / G (BNC) with sync 1.0 Vp-p (75-ohm)

PC IN (HIGH-DENSITY Mini-D-SUB 15PIN) Y or G with sync 1.0 Vp-p (75-ohm)

SERIAL EXTERNAL CONTROL TERMINAL (D-SUB 9PIN) RS-232C COMPATIBLE
SPEAKERS 6-ohm, 16 W [8 W + 8 W] (10 % THD)

Accessories Supplied

Remote Control Transmitter N2QAYB000432
Batteries AA Size × 2
Fixing band TMME203 × 1

Dimensions (W × H × D) 47.7" (1,210 mm) × 28.5" (724 mm) × 3.8" (95 mm)
Mass (weight)

main unit only approx. 75.0 lbs
with speakers approx. 86.0 lbs

Note:

• Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.

525 (480) / 60i 60p, 625 (575) / 50i 50p, 750 (720) / 60p 50p, 1125 (1080) /

60i 60p 50i 50p 24p 25p 30p 24sF, 1250 (1080) / 50i

SXGA, UXGA ..... (compressed)

Horizontal scanning frequency 15 - 110 kHz
Vertical scanning frequency 48 - 120 Hz

P

/B (BNC), PR/R (BNC) 0.7 Vp-p (75-ohm)

B

AUDIO IN (RCA PIN JACK × 2) 0.5 Vrms

Y or G without sync 0.7 Vp-p (75-ohm)

B / P

/ CB: 0.7 Vp-p (75-ohm)

B

/ CR: 0.7 Vp-p (75-ohm)

R / P

R

HD / VD: 1.0 - 5.0 Vp-p (high impedance)

AUDIO IN (M3 JACK) 0.5 Vrms

8

5 Operating Instructions

TH-50PH12U

9

TH-50PH12U

Option Menu for GPH12D series

GPH12D chassis series have special function and operation setting facility called Option Menu. This Option Menu is use­ful for special function required customers. This should be set at the installation stage.

Option menus default setting Contents
Weekly Command Timer --- Sets Weekly Command Timer.
Onscreen display On Enable/Disable to display input mode indication after power on and no signal

Initial INPUT Off Sets the initial input mode when the power is turned on. Allow input mode selec-

Initial VOL level Off Sets the initial volume level when the power is turned on. Allow Volume control

Maximum VOL Level Off Sets the maximum volume to desired level. Volume cannot exceed this level.
INPUT lock Off Fixes the input mode to AV, Component/RGB or PC. Can not change input

Button lock Off Enable/Disable bottom operation buttons (Input, Menu, Enter and/or volume up/

Remocon User Level Off Remote key invalidation.

Advanced PIP Off Off: Sets normal two screen display mode.

Off-timer function Enable Off-timer operation Enable/Disable.
Initial Power Mode Normal Sets the power mode of the unit for when the power recovers from failure or

ID select 0 Set ID number from 0 to 100.
Remote ID Off Remote ID function On/Off.

Serial ID Off Serial ID function On/Off
Display size Off Display size function On/Off
Studio W/B Off Studio W/B function On/Off
Studio Gain Off Studio Gain function On/Off
Slot power Off Sets the slot power mode while the power is turned on.

Power On Screen Delay Off You can set the power-on delay time of the displays to reduce the power load,

Clock Display Off Clock Display function On/Off.
All Aspect Default Aspect mode: default/All aspect mode.
Auto Setup Manual Sets the operational mode of the automatic position adjustment in the POS./

Rotate Off Rotate function On/Off
Serial Slot Select Slot1 Selects the slot which communicates serial.

indication.

tion while power is on.

while power is on.

mode by input selection key.

down)

Off: Valid key is all key of remote.
User1: Valid key are only Stand-by (ON/OFF), Input, Direct input, Picture, Sur­round, Sound mute On/Off, and volume adjustment.
User2: Valid key is only Stand-by (ON/OFF).
User3: All keys are null and void

On: Sets Advanced PIP mode.

after plugging off and in again.

(While the Remote ID on, standard remote function can not control the unit.)

Allow Optional Terminal Board insert Slots while power is on.

when you press to turn on the multiple displays that are set together, for
example, on MULTI DISPLAY system.
Set each display’s setting individually.

SIZE memu.

Note: The setting of an external command can be set only from the fixed serial
terminal.

Note:

When both main unit buttons and remote control are disabled due to the “Button lock”, “Remocon User level” or “Remote ID”
adjustments, set all the values “Off” so that all the buttons are enabled again.
Press the “Volume down” button on main unit together with “R” button on the remote control and hold for more than 5 seconds.
The “SHIPPING“ menu is displayed and the lock is released when it disappears.

10

6 Service Mode

6.1. CAT (Computer Aided Test) mode

TH-50PH12U

To exit the CAT mode, access the ID mode and switch off the main power.

6.1.1. IIC mode

Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on
the remote control.

Subject and item are mentioned on “IIC mode structure”.
To exit the IIC mode, press the R button on the remote control.

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6.1.2. CD mode

Select the CD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.

Memory data change

To exit the CD mode, press the R button on the remote control.

6.1.3. SD mode

Select the SD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on
the remote control.

To exit the SD mode, press the R button on the remote control.

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6.1.4. MS mode

Select the MS mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.

To exit the MS mode, press the R button on the remote control.

Caution:

Market Select should be set after exchange of DN-Board.

Destination number

Number Destination Number Destination

0 Japan 16 -­1 North America 17 -­2 Europe 18 China
3 Others 19 China (Hotel)
4 Britain 20 Russia
5 Taiwan 21 Russia (Hotel)
6 Thailand 22 Hong Kong
7--23-­8 Japan (Hotel) 24 --

9 North America (Hotel) 25 -­10 Europe (Hotel) 26 -­11 -- 2 7 -­12 Britain (Hotel) 28 Middle East/Hong Kong
13 -- 29 Middle East/Hong Kong (Hotel)
14 Thailand (Hotel) 30 Australia
15 -- 31 Australia (Hotel)

Default setting

Number Destination

1 North America

6.1.5. ID mode

Select the ID mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.

To exit the ID mode, press the R button on the remote control.

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6.2. IIC mode structure (following items value is sample data)

14

7 Troubleshooting Guide

7.1. Self Check

7.1.1. Display Indication

1. Self-check is used to automatically check the bus line
controlled circuit of the Plasma display.

2. To get into the Self-check mode, press the volume down
button on the customer controls at the bottom of the set,
at the same time pressing the OFF-TIMER button on the
remote control, and the screen will show.

If the IIC ports have been checked and found to be incorrect
Or not located then “ - - ” will appear in place of “OK ”
“01” in the line of the “PTCT” means the number of blinks of the
Power LED is 1. (Reference to 7.1.2)
“H09 ” in the line of the “PTCT” is the error code.

To exit the CAT mode switch off the main power.

Note:

The line of the “PTCT” displays when you get into the Self­check mode for the first time only after the Power LED
blinks.

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7.1.2. Power LED Blinking timing chart

1. Subject
Information of LED Blinking timing chart.

2. Contents
When an abnormality has occurred to the unit, the protection circuit operates and resets 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.

About blinking LED

16

7.2. No Power

First check point
There are following 3 states of No Power indication by power LED.

1. No lit.

2. Green is lit then turns red blinking a few seconds later.

3. Only red is lit.

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7.3. No Picture

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7.4. 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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8 Service Fixture & Tools

8.1. SC jig

Purpose:

To find the failure board (SC or SU/SD) when the power LED is blinking 7 times.

SC jig:

Jumper connector to connect to SC50 connector on SC board

Part number:

TZSC09187

How to use:

Caution: Remove SC jig from SC board after inspection.

1. Remove all connector between SC board and SU/SD board to isolate SC board from both SU and SD board electrically.

Note: The board will be damaged if all connector is not removed (for example; remove connector only for SU board
and stay connecting with SD board. The board will be damaged.)

2. Connect SC jig to co

3. Turn on the TV/Display Unit and confirm the power LED blinking.
LED blinking: Possible cause of failure is in SC board

No LED blinking (Lighting or no lighting): Possible cause of failure is in SU or SD board.

4. After inspection, turn off the TV/Display Unit and wait a few minutes to discharge.

5. Remove SC jig from SC board.

Remark: This SC jig can be used for all 2009 Plasma TV and Plasma Display.

nnector SC51 at left bottom side of SC board.

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9 Disassembly and Assem-

bly Instructions

• To disassemble P.C.B., wait for 1 minute after power was off
for discharge from electrolysis capacitors.

• , , , and marks indicate screw positions.

9.1. Removal of Rear Cover

1. Remove screws (×8 , ×29 , ×4 ) and then remove
the Rear Cover.

9.3. Removal of HA-Board

1. Remove 4 screws (D) and then remove the HA Terminal
Block.

2. Remove 4 screws (E).

3. Remove 3 screws (F) and then remove HA-Board.

9.4. Removal of Slot Block

1. Remove the flexible cables from the connectors (DS1,
DS3).

2. Disconnect the connectors (DS2, DS4, DS6, DS7, DS8,
DS10, DS15).

3. Remove 5 screws and then remove the Slot Block.

9.2. Removal of HHH-Board

1. Remove 4 screws (A) and then remove the HHH Terminal
Block.

2. Remove 4 screws (B).

3. Remove 2 screws (C) and then remove HHH-Board.

9.5. Removal of HX-Board

1. Remove the Slot Block.
(Refer to Removal of Slot Block)

2. Remove 6 screws and then remove the Slot Case.

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3. Disconnect the connector (HX1).

4. Remove 4 Hexagonal-Head screws and 2 screws of HX­Board and then remove HX-Board.

9.6. Removal of DS-Board

1. Remove the Slot Block.
(Refer to Removal of Slot Block)

2. Remove 6 screws and then remove the Slot Case.

5. Remove 3 screws and then remove DS-Board.

9.7. Removal of DN-Board

1. Remove the flexible cables from the connectors (DN1,
DN2).

2. Disconnect the connectors (DN5, DN31, DN32, DN33).

3. Remove 4 screws and then remove DN-Board and Fixed
Plate.

3. Disconnect the connector (DS14).

4. Remove 10 screws and then remove the Fixed Plate.

Note:

A re-setup of the destination is performed by MS
mode after DN-Board exchange.

9.8. Removal of D-Board

1. Remove the Slot Block.
(Refer to Removal of Slot Block)

2. Disconnect the connectors (D5, D25).

3. Remove the flexible cables from the connectors (D20,
D31, D32).

4. Remove 4 screws and then remove D-Board.

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9.9. Removal of P-Board

1. Disconnect the connectors (P2, P6, P7 P9, P11, P25,
P34, P35).

2. Remove 9 screws and then remove P-Board.

9.10. Removal of PF-Board

1. Remove the Slot Block.
(Refer to Removal of Slot Block)

2. Disconnect the connectors (PF1, PF9, PF10).

3. Remove 3 screws and then remove the AC-Inlet Block.

9.11. Removal of Speaker Terminal
Block (L, R)

1. Remove 2 screws and then remove the Speaker Terminal
Block (H3-Board) (L, R).

2. Turn over the Speaker Terminal Block (L, R) and then dis­connect the connector (H37).

4. Remove 7 screws and then remove PF-Board.

9.12. Removal of SU-Board and SD­Board

1. Remove the Speaker Terminal Block (R).
(Refer to Removal of Speaker Terminal Block (L, R))

2. Remove the flexible cables from the connectors (SU1,
SU2, SU3, SU4, SU11, SD1, SD2, SD3, SD4, SD11).

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3. Disconnect the connectors (SU41, SD42, SD46).

4. Remove 8 screws and then remove SU-Board and SD­Board.

9.13. Removal of SC-Board

1. Remove the Speaker Terminal Block (R).
(Refer to Removal of Speaker Terminal Block (L, R))

2. Disconnect the connectors (SU41, SD42, SD46).

3. Remove 8 screws.

4. Slide SU-Board and SD-Board to the left.

9.14. Removal of SS2-Board

8. Disconnect the connector (SS24).

9. Remove the flexible cable from the connector (SS58).

10. Remove 2 screws and then remove SS2-Board.

9.15. Removal of SS-Board

1. Disconnect the connectors (SS3, SS11, SS23, SS24).

2. Remove the flexible cables from the connectors (SS52,
SS55).

5. Disconnect the connectors (SC2, SC3).

6. Remove the flexible cable from the connector (SC20).

7. Remove 6 screws and then remove SC-Board.

3. Remove 5 screws and then remove SS-Board.

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9.16. Removal of C1-Board

1. Remove the Slot Block.
(Refer to remove of Slot Block).

2. Remove 4 screws and then remove the Stand Block (R).

3. Remove 1 screw and then remove the Speaker Terminal
Block (R).

9.17. Removal of C2-Board

1. Remove the Slot Block.
(Refer to remove of Slot Block).

2. Remove the flexible cables from the connectors (C20,
C21, C22).

3. Remove 6 screws ( ) and then remove the flexible
cables from the connectors (CB6, CB7, CB8).

4. Remove 3 screws ( ) and then remove C2-Board.

9.18. Removal of C3-Board

1. Remove 4 screws and then remove the Stand Block (L).

4. Remove the flexible cables from the connectors (C10,
C11).

5. Remove 10 screws ( ) and then remove the flexible
cables from the connectors (CB1, CB2, CB3, CB4, CB5).

6. Remove 5 screws ( ) and then remove C1-Board.

2. Remove 1 screw and then remove the Speaker Terminal
Block (L).

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TH-50PH12U

3. Disconnect the connectors (C33, C35).

4. Remove the flexible cable from the connector (C32).

5. Remove 6 screws ( ) and then remove the flexible
cables from the connectors (CB9, CB10, CB11).

6. Remove 3 screws ( ) and then remove C3-Board.

9.19. Removal of S1-Board

1. Remove 2 screws (H) and then remove the S1-Board
Block.

2. Disconnect the connector (S34).

3. Remove 1 screw (J) and then remove S1-Board.

3. Remove 12 screws (K) and then remove the Fans.

4. Reassemble the Fans in reverse order.

5. Stick the Fan Sponges around the Fan.

9.20. Removal of Fan

1. Remove 9 screws and then remove 3 Fan Blocks.

2. Disconnect the Fan Relay Connectors.

Note:

The Fan Sponge is not re-usable.
Please use a new one when Fan exchange.

9.21. Removal of Front Glass, V1,
V2-Board and Cabinet Assy

1. Remove the S1-Board Block.
(Refer to Removal of S1-Board)

2. Disconnect the connectors (A2, A15).

3. Remove 12 screws.

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TH-50PH12U

4. Pull the bottom of the Plasma Display Panel forward
(arrow1).

5. Slide the Plasma Display Panel and then remove the
Plasma Display Panel (arrow2).

9.21.1. Removal of Front Glass

1. Remove 25 screws and then remove the Fixed Angle
(left, right, upper, bottom).

2. Remove the Front Glass.

9.21.2. Removal of V1-Board and V2-Board

1. Remove 13 screws and then remove the Fixed Angle
(right, bottom).

2. Remove 1 screw (L).

3. Disconnect the connector (V2) and then remove V1­Board.

4. Remove 3 hooks and then remove the Power Button and
Power Button Spring.

5. Disconnect the connector (V15) and then remove V2­Board.

6. Remove 2 hooks and then remove the 5 Key Button from
V2-Board.

Note: when Front Glass is exchanged

• Paste the Front Glass Sponges in order along each
Fixed Angles left and right, upper and bottom.

Note

• The sponges are parts which cannot be recycled. Please
use the new article when you exchange the Front Glass.

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TH-50PH12U

9.21.3. Removal of Cabinet Assy

1. Remove the Front Glass.
(Refer to Removal of Front Glass)

2. Remove V1-Board and V2-Board.
(Refer to Removal of V1-Board and V2-Board)

3. Remove the LED Panel and Remote Sensor Panel.

4. Remove the Cabinet Assy.

9.22. Removal of Plasma Display
Panel

The C1,C2,C3 Boards are connected with the plasma dis­play panel for the repair.

1. Remove 9 screws and then remove the 3 Fan Blocks.

2. Disconnect the Fan Relay Connectors.

4. Remove the flexible cables from the connectors (DS1,
DS3).

5. Disconnect the connectors (DS2, DS4, DS6, DS7, DS8,
DS10, DS15).

6. Remove 5 screws and then remove the Slot Block.

7. Remove 2 screws and then remove the Speaker Terminal
Block (L, R).

3. Remove 8 screws and then remove the Stand Block (L,
R).

8. Disconnect the connectors (P34, PF1).

9. Remove 3 screws and then remove the AC-Inlet Block.

10. Remove 2 screws and then remove the S1-Board Block.

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TH-50PH12U

11. Disconnect the connector (PF9).

12. Remove 7 screws and then remove PF-Board.

13. Remove the PF-Barrier.

14. Disconnect the connector (DN5).

15. Remove 4 screws and then remove DN-Board and Fixed
Plate.

19. Remove the flexible cables from the connectors (SU1,
SU2, SU3, SU4, SU11, SD1, SD2, SD3, SD4).

20. Disconnect the connectors (SU41, SD42, SD46).

21. Remove 8 screws and then remove SU-Board and SD­Board.

16. Disconnect the connector (D25).

17. Remove the flexible cables from the connectors (C11,
C21, SC20).

18. Remove 4 screws and then remove D-Board.

22. Disconnect the connectors (SC2, SC3).

23. Remove 6 screws and then remove SC-Board.

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TH-50PH12U

24. Disconnect the connectors (C33, C35, SS11, SS24).

25. Remove the flexible cables from the connectors (SS52,
SS55, SS58).

26. Remove 6 screws and then remove SS-Board and SS2­Board.

28. Remove 6 screws and then remove the Barriers.

29. Remove the flexible cables from the connectors (C10,
C20, C22, C32).

27. Remove 9 screws and then remove P-Board.

30. Remove 12 screws.

31. Pull the bottom of the Plasma Display Panel forward
(arrow1).

32. Slide the Plasma Display Panel and then remove the
Plasma Display Panel (arrow2).

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TH-50PH12U

33. Remove the Rear Cover Hook Left and Right from the
Plasma Display Panel.

34. Remove the 8 Rear Cover Spacers and Rear Cover
Spacer Rings from the Plasma Display Panel.

Caution:

• Please confirm the installation place of Rear Cover Hook
Left and Right, Rear Cover Spacer and Rear Cover
Spacer Ring when you exchange the Plasma Display
Panel, and install them in an original installation place
after exchanging the Plasma Display Panel.

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