Panasonic TH-42PD50U Service manual

Digital Progressive Wide Plasma Television

TH-42PD50U

GP8DU Chassis

Specifications

PowerSource

PowerConsumption Maximum : 390 W

Plasma Displaypanel Drive method : AC type 42-inch, 16 : 9 aspect ratio

Screen Size

Dimensions ( W × H × D )

Mass (Weight) 72.8 lb. (33.0 kg) Net

Channel CapabilityATSC/NTSC

Sound

Speake

Audio Output 16 W [ 8 W + 8 W ] ( 10 % THD )

FEATURES 3D Y/C FILTER HDMI

Accessories Supplied Remote control: EUR7627Z60

Operating Conditions Temperature : 34 °F - 104 °F (0 ° - 40 °C)

Connection Terminals

C 120 V, 50/60 Hz

Stand-bycondition : 0.6 W

pprox. 367/32" (920mm) (W) × 20

pprox. 423/64“ (1068 mm) × 27

“ (518 mm) (H) × 41

“ (701 mm) × 3

VHF/ UHF : 2-69, CATV:1-135

/32“ (120 mm) × 2

“ (60 mm) × 2 pcs 6 W

CLOSED CAPTION V-Chip

F-type antenna adapter(5C-2V × 1)

A Battery×2

C Cord

Pedestal

Cable clamper×2

Humidity: 20 % - 80 % (non-condensing)

V INPUT 1- 2 VIDEO 1.0 Vp-p (75 W)

(Phono Jack Type)

S-VIDEO

(Mini DIN 4-pin)

UDIO L-R 0.5 Vrms

(Phono Jack Type × 2)

V PROG. OUT VIDEO 1.0 Vp-p (75 W)

(Phono Jack Type)

“ (96.5 mm)

ORDER NO. ITD0503007CE

B19 Canada: B07

“ (1056 mm) (diagonal)

: 1.0 Vp-p (75 W ), C : 0.286 Vp-p (75 W)

TH-42PD50U

UDIO L-R 0.5 Vrms

(Phono Jack Type × 2)

COMPONENT VIDEO

INPUT1-2 P

HDMI HDMI type A Connecto

DIGITAL AUDIO OUT PCM/DolbyDigital, FiberOptic

UDIO L-R 0.5 Vrms

(Phono Jack Type × 2)

UDIO L-R 0.5 Vrms

(Phono Jack Type × 2)

1.0 Vp-p (including synchronization)

± 0.35 Vp-p

Note:

Design and Specifications are subject to change without notice. Weight and Dimensions shown are approximate.

CONTENTS

Page Page

1 Applicable signals 4

2 Safety Precautions

2.1. General Guidelines

3 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

4 About lead free solder (PbF)

5 Service Hint

6 Plasma panel replacement method

6.1. Remove the Back cover.

6.2. Remove the P-Board.

6.3. Remove the PB-Board

6.4. Remove the D-Board

6.5. Remove the rear terminal cover

6.6. Remove the metal frame

6.7. Remove the DT-Board and DV-Board

6.8. Remove the DG-Board

6.9. Remove the H-Board

6.10. Remove the PA-Board

6.11. Remove the Z-Board

6.12. Remove the SU-Board

6.13. Remove the SD-Board

6.14. Remove the SC-Board

6.15. Remove the SS-Board

6.16. Remove the C1-Board

6.17. Remove the C2-Board

6.18. Remove the K-Board

6.19. Remove the S-Board

6.20. Remove the Speaker L, R

6.21. Remove the Plasma panel section from the Front frame

(glass)

6.22. Replace the plasma panel (finished).

7 Location of Lead Wiring

7.1. Lead of Wiring (1)

7.2. Lead of Wiring (2)

7.3. Lead of Wiring (3)

8 Self-check Function

8.1. How to access

8.2. Power LED Blinking timing chart

8.3. No Power

8.4. No Picture

8.5. Local screen failure

9 Serviceman Mode

9.1. How to enter into Serviceman Mode

9.2. Cancellation

9.3. Contents of adjustment mode

9.4. Option

10 Adjustment Procedure

10.1. Driver Set-up

10.2. Initialization Pulse Adjust

10.3. P.C.B. (Printed Circuit Board) exchange

10.4. Adjustment Volume Location

10.5. Test Point Location

11 Hotel mode

12 Conductor View

12.1. P-Board

12.2. PA-Board

12.3. PB-Board

12.4. H-Board

12.5. DT-Board

12.6. DV-Board

12.7. DG-Board

12.8. Z-Board

12.9. D-Board

12.10. C1-Bo ard

12.11. C2-Bo ard 48

12.12. SC-Bo ard

12.13. SU-Bo ard

12.14. SD-Bo ard

12.15. SS-Bo ard

12.16. K and S-Board

13 Block and Schematic Diagram

13.1. Schematic Diagram Notes

13.2. Main Block Diagram

13.3. P-Board Block Diagram

13.4. P-Board (1 of 6) Schematic Diagram

13.5. P-Board (2 of 6) Schematic Diagram

13.6. P-Board (3 of 6) Schematic Diagram

13.7. P-Board (4 of 6) Schematic Diagram

13.8. P-Board (5 of 6) Schematic Diagram

13.9. P-Board (6 of 6) Schematic Diagram

13.10. PA and PB-Board Block Diagram

13.11. PA-Bo ard Schematic Diagram

13.12. PB-Bo ard Schematic Diagram

13.13. H, K, S and Z-Board Block Diagram

13.14. H Board (1 of 3) Schematic Diagram

13.15. H-Boa rd (2 of 3) Schematic Diagram

13.16. H-Boa rd (3 of 3) Schematic Diagram

13.17. Z-Boa rd Schematic Diagram

13.18. K and S-Board Schematic Diagram

13.19. DT-Bo ard Block Diagram

13.20. DT-Bo ard (1 of 4) Schematic Diagram

13.21. DT-Bo ard (2 of 4) Schematic Diagram

13.22. DT-Bo ard (3 of 4) Schematic Diagram

13.23. DT-Bo ard (4 of 4) Schematic Diagram

13.24. DV-Bo ard Block Diagram

13.25. DV-Bo ard Schematic Diagram

13.26. DG-B oard (1 of 2) Block Diagram

13.27. DG-B oard (2 of 2) Block Diagram

13.28. DG-B oard (1 of 11) Schematic Diagram

13.29. DG-B oard (2 of 11) Schematic Diagram

13.30. DG-B oard (3 of 11) Schematic Diagram

13.31. DG-B oard (4 of 11) Schematic Diagram

13.32. DG-B oard (5 of 11) Schematic Diagram

13.33. DG-B oard (6 of 11) Schematic Diagram

13.34. DG-B oard (7 of 11) Schematic Diagram

13.35. DG-B oard (8 of 11) Schematic Diagram

13.36. DG-B oard (9 of 11) Schematic Diagram

13.37. DG-B oard (10 of 11) Schematic Diagram

13.38. DG-B oard (11 of 11) Schematic Diagram

13.39. D-Boa rd Block Diagram

13.40. D-Boa rd (1 of 6) Schematic Diagram

13.41. D-Boa rd (2 of 6) Schematic Diagram

13.42. D-Boa rd (3 of 6) Schematic Diagram

13.43. D-Boa rd (4 of 6) Schematic Diagram

13.44. D-Boa rd (5 of 6) Schematic Diagram

13.45. D-Boa rd (6 of 6) Schematic Diagram

13.46. C1 and C2-Board Block Diagra m

13.47. C1-Bo ard (1 of 2) Schematic Diagram

13.48. C1-Bo ard (2 of 2) Schematic Diagram

13.49. C2-Bo ard (1 of 2) Schematic Diagram

13.50. C2-Bo ard (2 of 2) Schematic Diagram

13.51. SC-Bo ard Block Diagram

13.52. SC-Bo ard (1 of 2) Schematic Diagram

13.53. SC-Bo ard (2 of 2) Schematic Diagram

13.54. SU-Bo ard Block Diagram

13.55. SU-Bo ard Schematic Diagram

13.56. SD-Bo ard Block Diagram

13.57. SD-Bo ard Schematic Diagram

13.58. SS-Bo ard Block Diagram

13.59. SS-Bo ard Schematic Diagram

14 Parts Location & Mechanical Replacement Parts List

14.1. Parts Location

14.2. Pcaking Exploded Views (1)

14.3. Pcaking Exploded Views (2)

14.4. Pcaking Exploded Views (3)

14.5. Mechanical Replacement Parts List

15 Replacement Parts List

15.1. Replacement Parts List Notes

15.2. Electrical Replacement Parts List

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100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

117

118

119

120

121

122

123

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1 Applicable signals

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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.

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 1MW and 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.

TH-42PD50U

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).

TH-42PD50U

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

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.

stamped on the back of PCB.

TH-42PD50U

5 Service Hint

Board Name Function Board Name Function

P Power Supply C1 Data Driver (Left) PA DC-DC Converter, Power SOS C2 Data Driver (Right) PB Audio Power SC Scan Drive

H AV Terminal, AV Switch SU Scan out (Upper) DT ATSC Interface SD Scan out (Lower) DV HDMI Interface

None serviceable. DV-Board should be exchanged for service.

DG Digital Signal Processor

Z Speaker out, Audio AMP

D Format Converter, Plasma AI Processor

SS Sustain Drive

K Remote receiver, Keyscan S Power Switch

6 Plasma panel replacement method

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.

6.4. Remove the D-Board

TH-42PD50U

6.3. Remove the PB-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the couplers (PB5, PB7, PB30, PB33 and PB34).

3. Remove the screws (×3 metal frame.

4. Remove the screws (× 4

) and remove the PB-Board

) and remove the PB-Board.

1. Remove the PB-Board.

2. Disconnect the couplers (D3, D5, D20 and D25) and

3. Disconnect the flexible cables (D33 and D34).

4. Remove the screws (×4

) and remove the D-Board.

TH-42PD50U

6.5. Remove the rear terminal cover

1. Remove the screws (×4 ).

2. 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.

4. Remove the screws (×1 ) and remove the DV-Board.

5. Remove the screws (×2 ).

6. Remove the DT-Board metal cover and remove the DT-

Board.

) and Remove the screws (×5

6.7. Remove the DT-Board and DVBoard

1. Unlock the cable clampers to free the cable.

2. Remove the screws (×5

3. Remove the DT-Board and DV-Board unit.

(Be careful the couplers (DV15 and DT22) when remove the DT-Board and DV-Board unit.)

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.

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.

TH-42PD50U

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.

TH-42PD50U

6.12. Remove the SU-Board

1. Remove the screws (×2 )

2. Slide the SU-Board to the left to disconnect from a coupler

(SC41 - SU41) on the SC-Board and disconnect a coupler (SU45 or SC45).

3. Disconnect the flexible cables (SD1, SD2, SD3) connected to the SU-Board, and remove the SD-Board.

3. Disconnect the flexible cables (SU1, SU2, SU3) connected to the SU-Board, and remove the SU-Board.

6.13. Remove the SD-Board

6.14. Remove the SC-Board

1. Disconnect the couplers (SC2, SC20, SC23).

2. Remove the screws (×6

) and remove the SC-Board.

1. Remove the screws (×2 )

2. Slide the SD-Board to the left to disconnect from a coupler (SC42 - SD42) on the SC-Board and disconnect a coupler (SD46 or SC46).

TH-42PD50U

6.15. Remove the SS-Board

1. Disconnect the couplers (SS11, SS12, SS23 and SS34).

2. Disconnect the flexible cables (SS41, SS42, SS43 and SS44).

3. Remove the screws (×6

) and remove the SS-Board.

6.17. Remove the C2-Board

1. Remove the flexible cables holder fastening screws (×8 ).

2. Disconnect the flexible cables (CB4, CB5, CB6 and CB7).

3. Disconnect the flexible cable (C21).

4. Disconnect the couplers (C22 and C23).

5. Remove the screws (×3

left and remove the C2-Board.

) and slide the C2-Board to the

6.16. Remove the C1-Board

1. Remove the flexible cables holder fastening screws (×6 ).

2. Disconnect the flexible cables (CB1, CB2 and CB3).

3. Disconnect the flexible cable (C11).

4. Disconnect the coupler (C12).

5. Remove the screws (×3

) and remove the C1-Board.

TH-42PD50U

6.18. 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.

6.20. Remove the Speaker L, R

6.19. 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.

1. Remove the screw (×8 ) and remove the Speaker L, R.

6.21. 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

TH-42PD50U

6.22. 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-Board and the C2-Board, connect the flexible

cables (×7) from the Plasma panel to the C1-Board and C2Board, 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.

3. For leaving the plasma panel from the front frame, pull the bottom of the front frame forward, lift, and remove.

TH-42PD50U

7 Location of Lead Wiring

7.1. Lead of Wiring (1)

7.2. Lead of Wiring (2)

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7.3. Lead of Wiring (3)

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8 Self-check Function

When symptoms like “the power fails sometimes” or “sometimes there is no picture and/or sound” can not be confirmed at the time of servicing, the self-check function can be used to confirm the occurrence and to find the defective circuit.

In case of “power failure”, flashing of the “POWER” indication (red) at the front of the unit can be used to narrow down the +B line.

8.1. How to access

8.1.1. Access

Produce TV reception screen and, while pressing [VOLUME-] button on the main unit, press [SLEEP] button on the remote controller unit simultaneously.

8.1.2. Exit

When the AC code is pulled out and opened, the display returns to the normal screen.

8.1.3. Screen display

Display Ref.No. Description Board UV TU8200 TV Tuner DT-Board DT1 IC8240 HDSL PEAKS_Lite DT-Board DT2 IC8240 HDSL PEAKS_Lite DT-Board SND IC2608 BBE VIVA H-Board AVSWV IC2602 Video SW H-Board AVSWA IC2605 Audio SW H-Board GC4P IC4026 GC4PRO DG-Board HDMI IC5003 HDMI I/F RECEIVER DV-Board MEM IC4008 EEPROM DG-Board RTC IC4024 CLOCK GEN DG-Board PANEL IC9300 Display Processor D-Board

TH-42PD50U

8.2. 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 blinkes of the Power LED on the front panel of the unit.

3. Remarks

Above Fan function is operated during the fans are installed.

8.3. 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 8.2.)

1. No lit

TH-42PD50U

8.4. No Picture

8.5. 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.

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Fig - 1

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9 Serviceman Mode

9.1. How to enter into Serviceman Mode

While pressing [VOLUME- ] button of the main unit, press [RECALL] button of the remote control three times in a row (within 2 seconds).

9.1.1. Adjustment method.....Use the remote control.

“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

“VOL” button...Value of sub items change in forward direction (

), in reverse direction ( )

9.2. Cancellation

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

9.3. 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.

Main item Sub item Sample Data

PCT-ADJ PICTUER 22D

PICTUER2 200 COLOR 30 TINT 0 S-BRT 800 RFAGC1 74 AGC-ADJ1 FIX RFAGC2 74 AGC-ADJ2 FIX

OPTION BOOT SD

OPT00 1 ANT-POW OFF POF-SET NORMAL STB-SEC SEC EMGCY OFF CLK-ADJ 80

EEP COPY ALL RM-SET COPY ALL STB-CAS - -

9.4. Option

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10 Adjustment Procedure

10.1. Driver Set-up

10.1.1. Item / Preparation

1. Input an APL 100 % white signal.

2. Set the picture controls: -

Picture mode: Normal

White balance: Cool

Aspect: 16:9

10.1.2. Adjustments

Adjust driver section voltages referring the panel data on the panel data label.

Name Test Point Voltage Volume Remarks

Vsus TPVSUS

(SS) Ve TPVE (SS) 156V ± 1V VR6074 (SS) * Vset TPVSET

(SC) Vad TPVAD (SC) -90V ± 1V VR6477

Vscn TPVSCN

(SC) Vda TPVDA (SS) 67V ± 1V R665 (P) PFC C448 (+)(-) 395V± 0.5V R443 (P) Vdat C557 (+)(-) 67V± 0.1V R665 (P) load

Vsus TPVsus 188V± 1V R628 (P) load

175V ± 1V R628 (P)

232V ± 6V Fixed *

(SC)

Vad+120V ±3VFixed

current :

0.4A

current :

2.0A

*See the Panel label.

10.2. Initialization Pulse Adjust

1. Input a Cross hatch signal.

2. Set the picture controls: -

Picture mode: Normal

White balance: Cool

Adjust the indicated test point for the specified wave form.

Test point Volume Level T1 TPSC1 (SC) --- 15 ± 10µ Sec T2 TPSS1 (SS) VR6557 (SC) 184 + 5µ / - 10µ Sec

TH-42PD50U

10.3. P.C.B. (Printed Circuit Board) exchange

10.3.1. Caution

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

10.3.2. Quick adjustment after P.C.B. exchange

P.C.B. Name Test Point Voltage Volume Remarks

P Board Vsus TPVSUS (SS) 175V ± 1V R628 (P) *

Vda TPVDA (SS) 67V ± 1V R665 (P)

SC Board Vad TPVAD (SC) -90V ± 1V VR6477 (SC)

Vset TPVSET (SC) 232V ± 6V Fixed

Vscn TPVSCN (SC) Vad + 120 ± 3V Fixed SS Board Ve TPVE (SS) 156V ± 1V VR6074 (SS) * D, DG Board White blance, Pedestal and Sub brightness for NTSC, PAL, HD, PC and 625i signals

*See the Panel label.

10.4. Adjustment Volume Location

10.5. Test Point Location

11 Hotel mode

TH-42PD50U

1. Purpose

Restrict a function for hotels.

2. Access command

Enter to the Service Mode.

Press MUTE button on remote control. Hold few

seconds.

Press the ch “UP” or “Down” button and Vol. “UP” or

“Down” button to Set the data of EEPROM(ADDRESS

1584) to 01.

Push the Power switch(button) off/on the set(the remote control) to turn the set off/on.

It can be made Hotel mode.

3. Exit command

First, set the data of EEPROM (ADDRESS 1584) to 00.

Next, Push the Power switch(button) off/on the set(the remote control) to turn the set off/on.

Then, it is no longer hotel mode.

4. Access command to the Hotel mode setup menu

<Prerequisite> : It is conditions that the data of

EEPROM(ADDRESS 1584) is 01.

In order to display the Hotel mode setup menu, please enter the following command (within 2 second).

[TV] : Vol. “Down” + [REMOTE] : TV/VIDEO (3 times)

Then, the Hotel mode setup menu is displayed.

(ADDRESS 1584) will be 01, even if each settings were done.

item Function Mode Select hotel mode ON/OFF Input Select input signal modes.

Channel Select channel when input signal is RF.

Volume Adjust output Volume.

Vol. Max Adjust maximum volume.

OSD Ctrl Restrict the OSD.

FP Ctrl Select flont key conditions.

Pow Ctrl Select power on control when AC power on.

Set this signal, each time power is switched on. <Selection> : Off/RF/COMP1/COMP2/HDMI1/HDMI2/VID EO1/VIDEO2

Off: give priority to a last memory.

Set the channel, each time power is switched on. <Selection>:0 to Last setting value

Set this volume, each time power is switched on. If the value of InitVol is changed, volume will change. However, priority is given to a last memory when InitVol is Off. When "InitVol" is larger than "MaxVol", make "InitVol" and "MaxVol" the same. <Selection/Range> : Off/0 to 63

Off: give priority to a last memory

Set this max. volume, each time power is switched on. When "MaxVol" is smaller than "InitVol", make "MaxVol" and "InitVol" the same, if "InitVol" is not Off. <Range> : 0to63

Restrict the OSD, each time power is switched on. <Selection>:Off: altogether valid. Pattern1: restrict the OSD.

Set this condition, each time power is switched on. <Selection> : Off/Pattern1/All

Off: altogether valid

Pattern: restrict input selection

All: altogether invalid.

Off: Power on in the state of last. ON: Power on when AC power on.

5. Explain the Hotel mode setup menu

CAUTION

This setup is not valid, unless data of EEPROM

TH-42PD50U

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