Panasonic GP4D, TH-37PW4, TH-37PWD4 Service Manual

Specifications

ORDER NO. ITD0109010C0

D10

Wide Plasma Display

TH-37PW4 TH-37PWD4

GP4D Chassis

Power Source:

Power Consumption: 395 W (US model)

Plasma Display panel: Drive method AC type

Contrast Ratio 3000:1 Brightness Capability (Panel only) 650 cd / m

Screen size: 818 mm (W)×461 mm (H)×939 mm

Operating condition: Temperature 34 °F - 104 °F (0 °C - 40 °C) Humidity 20 % - 80 % Applicable signals: Color System NTSC, PAL, PAL60, SECAM, Modified NTSC Scanning format 525i (480i), 625i (575i), 525p (480p), 625

PC signals VGA display

C120V 50/60Hz (US model) C220-240V 50/60Hz (Except US model)

295W (Except US model)

1.2W (stand-by condition) (US model)

1.8W (stand-by condition) (Except US model)

0.9W (Power off condition) (US model)

1.6W (Power off condition) (Expct US model)

37-inch, 16:9 aspect ratio

(As a set) 330 cd / m

(diagonal) No. of pixels 408,960 (852 (W)×480 (H)) [2,556×480 dots]

(575p), 750p (720p), 1125/60i, 50i, 24p, 24SF

(1080/60i, 50i, 24p, 24SF) ........SMPTE 274M

VGA

SVGA, SXGA, UXGA ...... (compressed)

Horizontal scanning frequency 15.5 - 110kHz

Vertical scanning frequency 48 - 120Hz

Connection terminals: AV

Video in 1.0 Vp-p (75-ohm) S-VIDEO IN

(MINI DIN 4PIN) AUDIO IN

(RCA PIN JACK × 2)

COMPONENT/RGB

Y/G 1.0 Vp-p/composite (75-ohm)

PB/B 0.7 Vp-p (75-ohm) PR/R 0.7 Vp-p (75-ohm) HD 1.0 - 5.0 Vp-p (high impedance) VD 1.0 - 5.0 Vp-p (high impedance) AUDIO IN

(RCA PIN JACK×2)

(HIGH-DENSITY D-SUB15PIN)

AUDIO IN (M3.5 JACK) 0.5Vrms (high impedance)

SERIAL

EXTERNAL CONTROL TERMINAL (D-SUB9PIN)

SPEAKERS (External speakers)

Dimensions (W×H×D): 36.2” (920 mm)21.7” (550mm) 3.5” (89 mm) Weight (Mass) approx. 55.1 Ibs (25.0 kg) (main unit only)

Y: 1 Vp-p (75-ohm), C: 0.286 Vp-p (75-ohm)

0.5 Vrms (high impedance)

0.7 Vp-p/non-composite (75-ohm)

0.5 Vrms (high impedance)

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

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

RS-232C COMPATIBLE

69 8W×2 (10% THD)

approx. 64.4 Ibs (29.2kg) (with speakers)

TH-37PW4 / TH-37PWD4

CONTENTS

Page Page

1 Safety Precautions 4

1.1. General Guidelines

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices 3 PCB Structure sheet of GP4D chassis 4 Service Hint 5 Location of Lead Wiring 6 Adjustment Procedure

6.1. +B Set-up

6.2. Driver Set-up

6.3. Initialization Pulse Adjust

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

6.5. Adjustment Volume Location

6.6. Test Point Location

7 Serviceman mode

7.1. CAT (computer Aided Test) mode

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

8 Alignment

8.1. NTSC panel white balance

8.2. PAL/SECAM panel white balance

8.3. Pedestal setting

8.4. PC/RGB panel white balance

8.5. HD/ 525i /525p panel white balance

8.6. 625i panel balance

8.7. Sub brighness setting

9 Trouble shooting guide

9.1. Self Check

9.2. No Power (US model)

9.3. No Power (Except US)

9.4. No Picture

9.5. Local screen failure

9.6. D-Board

10 Option Setting 11 IC Block Diagram 12 Conductor Views

12.1. F-Board

12.2. P-Board (US model)

12.3. P1-Board (Except US)

12.4. P3, P5, P6, P7 and P8-Board (Except US)

12.5. HX-Board

12.6. HZ-Board (Option TY-37TM4Z)

12.7. J-Board

12.8. D-Board

12.9. C1, C2, C3 and C4-Board

10 11 11 11

15 16 18 19 21 23 24

26 27 28 29 29 30

32 35 37

37 38 41 44 46 47 49 51 54

5 6 7 8 9

9 9

12.10. SC-Board

12.11. SU and SD-Board

12.12. SS, SS2 and SS3-Board

12.13. H3, S1 and V1-Board

13 Block and Schematic Diagrams

13.1. Schematic Diagram Notes

13.2. Main Block (US model) Diagrams

13.3. Main (Except US) Block Diagram

13.4. Power (US model) Block Diagram

13.5. P-Board (US model) Schematic Diagrams

13.6. Power (Except US) Block Diagram

13.7. P1-Board (Except US) Schematic Diagrams

13.8. F and P3-Board (Except US) Schematic Diagram

13.9. P5, P6, P7 and P8-Board (Except US) Schematic diagram

13.10. HX and H Block Diagram

13.11. HX-Board Schematic Diagrams

13.12. H-Board (Option TY-42TM4H) Schematic Diagram

13.13. HZ Block Diagrams

13.14. HZ-Board (1/2) (Option TY-37TM4Z) Schematic Diagram

13.15. HZ-Board (2/2) (Option TY-37TM4Z) Schematic Diagram

13.16. J-Board Block Diagrams

13.17. J-Board (1/5) Schematic Diagrams

13.18. J-Board (2/5) Schematic Diagrams

13.19. J-Board (3/5) and H3-Board Schematic Diagrams

13.20. J-Board (4/5) Schematic Diagrams

13.21. J-Board (5/5) Schematic Diagrams

13.22. D-Block Diagrams

13.23. D-Board (1/14) Schematic Diagrams

13.24. D-Board (2/14) Schematic Diagrams

13.25. D-Board (3/14) Schematic Diagrams

13.26. D-Board (4/14) Schematic Diagrams

13.27. D-Board (5/14) Schematic Diagrams

13.28. D-Board (6/14) Schematic Diagrams

13.29. D-Board (7/14) Schematic Diagrams

13.30. D-Board (8/14) Schematic Diagrams

13.31. D-Board (9/14) Schematic Diagrams

13.32. D-Board (10/14) Schematic Diagrams

13.33. D-Board (11/14) Schematic Diagrams

13.34. D-Board (12/14) Schematic Diagrams

13.35. D-Board (13/14) Schematic Diagrams

13.36. D-Board (14/14) Schematic Diagrams

13.37. C1-Board Schematic Diagrams

56 59 61 64

65 66 67 68 69 70 71 72

73 74 75 76 77

79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 95 96 97 98

99 100 101 102

13.38. C2-Board Schematic Diagrams 103

13.39. C3-Board Schematic Diagrams

13.40. C4-Board Schematic Diagrams

13.41. SC-Board Block Diagrams

13.42. SC-Board (1/2) Schematic Diagrams

13.43. SC-Board (2/2) Schematic Diagrams

13.44. SU/SD Block Diagram

13.45. SU-Board Schematic Diagrams

13.46. SD-Board Schematic Diagrams

13.47. SS-Board Block Diagrams

104 105 106 107 108 109 110 111 112

TH-37PW4 / TH-37PWD4

13.48. SS, SS4, SS5 and S1-Board Schematic Diagrams 113

14 Parts Location 15 Mech anica l Replacement Parts List

15.1. US model

15.2. Except US model

16 Repla ceme nt Parts List

16.1. Relpacement Parts List Notes

16.2. US model Electrical Replacement Parts List

16.3. Expect US model Electrical Replacement Parts List

16.4. Option (TY-37TM4Z) Replacement Parts List

115 117

117 117

120

120 121 140 161

TH-37PW4 / TH-37PWD4

1 Safety Precautions

1.1. General Guidelines

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

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 1M9 and 5.2M9.

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 1.5k9, 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 ACplugintheACoutletandrepeat 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-37PW4 / TH-37PWD4

2 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 asthe 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-37PW4 / TH-37PWD4

3 PCB Structure sheet of GP4D chassis

Board Name US model Except US model Function Remarks

P3 --- TNP1777 Drive voltage oscillator P5 --- TNP1778 Primary oscillator P6 --- TNP1779 PFC oscillator P7 --- TNPA1780 Drive voltage protection P8 --- TNPA1781 Process voltage protection P1 --- TXNP11JASE Power Supply 1

P TXN/P10JAS --- Power Supply 1

F TXN/F10JAS TXN/F1JASE Line Filter 1 V1 TNPA2282 Front SW & Remote receiver S1 TNPA2283 Power SW HX TZTNP010JBS PC type Input terminal HZ TZTNP020JBS RCA type Input terminal H3 TNPA2249 Speaker terminal SC TNPA2261 Scan Drive

D TZTNP01JCSE Digital process & control 1, 2

J TNPA2244 Separator / Audio Out 1 C1 TNPA2278 Data Drive (Upper Left) C2 TNPA2279 Data Drive (Upper Right) C3 TNPA2280 Data Drive (Lower Left) C4 TNPA2281 Data Drive (Lower Right) SU TNPA2284 Scan Out (Upper) 1 SD TNPA2285 Scan Out (Lower) 1 SS TNPA2262AB Sustain Drive 1

SS4 TNPA2377 Sustain Connection (Upper) SS5 TNPA2278 Sustain Connection (Lower)

Remarks

1. Recommend PCB´s for initial service for GP4D chassis.

2. Parts number of System model is TZTNP01JASE

Note

US model TH-37PWD4UZ Except US model TH-37PW4AZ/BX/EX/HZ/RZ

TH-37PWD4AZ/BX/EX/HZ/RZ

4 Service Hint

TH-37PW4 / TH-37PWD4

5 Location of Lead Wiring

6 Adjustment Procedure

TH-37PW4 / TH-37PWD4

6.1. +B Set-up

6.1.1. Item / Preparation

1. Input a Grey scale signal.

2. Set the picture controls: Picture mode: Normal White balance: Normal

6.1.2. Adjustments

Adjust and confirm indicated test point for the specified voltage.

Adjust

Test point Voltage Volume Name

P4 pin 1 (Hot) 400V ±1V R426 (P1)

Except US

P1 pin 3 170V ±1V R476 (P) US model Vsus

R625 (P3) Expect US

P2 pin 3 160V ±1V R505 (P) US model Vbk

R498 (P1) Except US

P12 pin 1 67V ±0.5V R473 (P) US model Vda

R519 (P1) Except US

Confirm

Test point Voltage Volume Name P23 pin 2 15V ±0.5V +15V P5 pin 1 13.5V ±0.5V +13V P13 pin 1 13.5V ±0.5V Audio 15V P13 pin 3 -13.5V ±0.5V Audio -15V P5 pin 5 5.1V ±0.3V 5V P7 pin4 5V ±0.2V STB5V (1) P14 pin 8 5.0V ±0.3V STB5V (2) P10 pin 1 17.0V ±0.5V FAN +B P10 pin 4 5.1V ±0.3V FAN 5V

PFC

6.2. Driver Set-up

6.2.1. Item / Preparation

1. Input an APL 100 % white signal.

2. Set the picture controls: Picture mode: Normal White balance: Cool Aspect: 16:9

6.2.2. Adjustments

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

Test point Voltage Volume Name

TPVSUS (SS-BOARD)

TPVBK (SC-BOARD)

TPVE (SS-BOARD)

TPVSET (SC-BOARD)

TPVAD (SC-BOARD)

TPVDA (SC-BOARD)

*See the Panel label.

Vsus ±1V* R478 (P) US model Vsus

R625 (P3) Except US

Vbk ±1V* R505 (P) US model Vbk

R498 (P1) Except US

Ve ± 1V* R6774 (SS) Ve

218 V ±6V --- Vset

Vad ±1V* R6477 (SC) Vad

67V±1V R473 (P) US model Vda

R519 (P1) Except US

TH-37PW4 / TH-37PWD4

6.3. 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) R6523 (SC) 20 } 15µ Sec T2 TPSC1 (SC) R6557 (SC) 170 } 20µ Sec

TPSC1 SCAN OUTPUT

TPSS1 SUSTAIN OUTPUT

T1 20±15µs

VSET

T2 170±20µs

Scan TPSC1

VSUS VBK

VSCN VAD

VSET2

6µs

VSUS

Sustain TPSS1

INITIALIZE SCAN PRE-INITIALIZE

ADDRESS PERIOD

VE2

SUSTAIN

VSUS

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

6.4.1. Caution

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

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

P.C.B. Item Volume Test point Level

P board PFC R426 (3) Except US P4 connector pin 1 400V ± 1 V

Vsus R478 (P) US model TPVsus (SS) 175V ± 1 V

R625 (P3) Except US

Vbk R505 (P) US model TPVBK (SC) 160V ± 5 V

R498 (P1) Except US

Vda R473 (P) US model TPVDA (SS) 67V ± 1 V

R519 (P1) Except US SC board Vad R6477 TPVAD (SC) -90 ± 1 V SS board Ve R6774 TPVE (SS) 150 ± 1 V D board White balance, Pedestal and Sub brightness for NTSC, PAL, HD, PC and 625I signals.

6.5. Adjustment Volume Location

TH-37PW4 / TH-37PWD4

6.6. Test Point Location

TH-37PW4 / TH-37PWD4

7 Serviceman mode

7.1. CAT (computer Aided Test) mode

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

7.1.1. IIC mode

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

Subject and item are mentioned on page 14.

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

TH-37PW4 / TH-37PWD4

7.1.2. CD mode

Select the CD mode by Up/Down button on the remote control at the front page of CAT mode then press the Mute button on the remote control more than 5 sec.

Micom software version ( IC9705 / TVRJ562), this version can be upgrade by

1. replace of new version IC

2. Loading the new version software from loader tool, TZSC07036.

Memory data version D (IC9706 /TVRJ601) in the D board

Version Model Type Destination

4.** PWD4UZ System USA

5.** PW4BX,HZ, Consumer U.K.H.K.,

6.** PWD4AY,BX, EX, HZ, RZ System U.K. / Euro / Australia

7.** PW4AZ, EX, RZ Consumer Euro / Australia

Memory data version H (IC3699) in the H board

This version is difference depends on the H board type.

Version Type of H borad

2.** HZ (RCA)

Memory data change

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

TH-37PW4 / TH-37PWD4

7.1.3. SD mode

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

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

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

8 Alignment

8.1. NTSC panel white balance

INPUT Alignment menu ProcedureEquipment Setting

1 NTSC Color Picture: 1) Find the nearest area to brightness of 10 cd/m2 as Low

Gray Scale Analyzer Normal Sub Adjust light by color sensor. Pattern White balance: Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m

Cool

Aspect: PANEL W/B

16:9 G cut off 3) Set G cut off to " 80 ".

PANEL W/B

B cut off 4) Adjust B and R cut off to set color temperature as R cut off shown Fig.-01.

High light 75% Sub Adjust

Low light 15% Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light

PANEL W/B

exactly.

to 10 cd/m

6)Find 75% of white area by color sensor.

G Drive 7) Set G Drive to " D8 ".

B Drive 8) Adjust B and R Drive to set color temperature

R Drive as shown Fig.-01.

TH-37PW4 / TH-37PWD4

9) Repeat item 4) to 7) to set both Low light and high light.

PANEL W/B

R,G,B Drive 10) Increase same steps of R, G and B Drive to set R,G,B Drive largest level of 3 color drive to "FC".

PANEL W/B

R,G,B cut off 11) Re-adjust Low light level again.

Color Temp. x y

Cool(Hi) 0.272 0.290

Normal(Mid) 0.288 0.296

Warm(Low) 0.313 0.329

Fig. -01

2 Picture: 1) Change white balance to "Normal".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Normal

PANEL W/B

Aspect: R,G,B Drive

16:9

3 Picture: 1) Change white balance to "Warm".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Warm

PANEL W/B

Aspect: R,G,B Drive

16:9

4 Picture: Picture Menu 1) Change color templature to "Cool".

Normal Sub Adjust

White balance: Sub Bright 2)Re-set Sub bright to "30"

Cool

Aspect:

16:9

Note:

OSD is the difference between US model and Except US model. Picture:Normal (Except US)/Standard (US model) White balance (Except US)/Color Temp (US model)

TH-37PW4 / TH-37PWD4

8.2. PAL/SECAM panel white balance

INPUT Alignment menu ProcedureEquipment Setting

1 PAL Color Picture: 1) Find the nearest area to brightness of 10 cd/m2 as Low

Gray Scale Analyzer Normal Sub Adjust light by color sensor. Pattern White balance: Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m

Cool exactly.

Aspect: PANEL W/B

16:9 G cut off 3) Set G cut off to " 80 ".

PANEL W/B

High light 75% Sub Adjust

Low light 15% Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light

PANEL W/B

B cut off 4) Adjust B and R cut off to set color temperature as

R cut off shown Fig.-02.

to 10 cd/m

6)Find 75% of white area by color sensor.

G Drive 7) Set G Drive to " D8 ".

B Drive 8) Adjust B and R Drive to set color temperature

R Drive as shown Fig.-02.

9) Repeat procedure 4) to 7) to set both Low light and high light.

R,G,B Drive 10) Increase same steps of R, G and B Drive to set R,G,B Drive largest level of 3 color drive to "FC".

R,G,B cut off 11) Re-adjust Low light level again.

Color Temp. x y

Cool(Hi) 0.272 0.290

Normal(Mid) 0.288 0.296

Warm(Low) 0.313 0.329

Fig. -02

2 Picture: 1) Change white balance to "Normal".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Normal PANEL W/B

Aspect: R,G,B Drive

16:9

3 Picture: 1) Change white balance to "Warm".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Warm PANEL W/B

Aspect: R,G,B Drive

16:9

4 Picture: Picture Menu 1) Change color templature to "Cool".

Normal Sub Adjust

White balance: Sub Bright 2)Re-set Sub bright to "30"

Cool

Aspect:

16:9

TH-37PW4 / TH-37PWD4

Alignment menu ProcedureEquipment Setting

5 Picture: 1) Write down each color temaparature of R,G,B drive and

Normal Cut off data as follows.

Aspect:

16:9

White

White balance:

Cool

Normal

Warm

Balance Cool Normal Warm R Drive G Drive B Drive R Cut off G Cut off B Cut off

SECAM signal 2) Input SECAM signal.

3) Copy PAL R,G,B drive and cut off data of each white balance mode to SECAM position.

TH-37PW4 / TH-37PWD4

8.3. Pedestal setting

INPUT Alignment menu ProcedureEquipment Setting

1 Component Picture: PANEL W/B

(525i, 525p, 625i, Normal R cut off 1) Set R,G and B cut off to "

720i or 1080i) White balance: G cut off

Gray Scale Aspect: Pattern 16:9

Black 2 %

Black 0 % at black 2% area and no emission at black 0% area.

Cool B cut off

Chroma Control:

Gun off

RGB Sub Adjust:

G Sub Bright

Chroma Control:

Gun off

RGB Sub Adjust:

B Sub Bright

Chroma Control:

Gun off

RGB Sub Adjust:

R Sub Bright

** Adjust at the dark room.

80 ".

2) Set Gun off to "

3) Adjust G Sub bright to start some of green pixels emission at black 2% area and no emission at black 0% area.

4) Set Gun off to "

5) Adjust B Sub bright to start some of blue pixels emission

6) Set Gun off to "

7) Adjust R Sub bright to start some of red pixels emission at black 2% area and no emission at black 0% area.

5". (Only green pixels can emit.)

3". (Only blue pixels can emit.)

6". (Only red pixels can emit.)

2 RGB(PC) Picture: 1) Change input to RGB signal.

Gray Scale Normal PANEL W/B Pattern White balance: R,G,B cut off 2) Repeat procedure 1) to 7) of Component input signal.

Cool PANEL W/B

Aspect: R,G,B Drive

16:9

Black 2 %

Black 0 %

8.4. PC/RGB panel white balance

INPUT Alignment menu ProcedureEquipment Setting

1 PC Color Picture: 1) Find the nearest area to brightness of 10 cd/m2 as Low

Gray Scale Analyzer Normal Sub Adjust light by color sensor. Pattern White balance: Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m

Cool exactly.

Aspect: PANEL W/B

16:9 G cut off 3) Set G cut off to " 80 ".

PANEL W/B

B cut off 4) Adjust B and R cut off to set color temperature as R cut off shown Fig.-03.

High light 75% Sub Adjust

Low light 15% Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light

to 10 cd/m

6)Find 75% of white area by color sensor.

PANEL W/B

G Drive 7) Set G Drive to " D8 ".

PANEL W/B

B Drive 8) Adjust B and R Drive to set color temperature

R Drive as shown Fig.-03.

9) Repeat item 4) to 7) to set both Low light and high light.

PANEL W/B

R,G,B Drive 10) Increase same steps of R, G and B Drive to set R,G,B Drive largest level of 3 color drive to "FC".

PANEL W/B

R,G,B cut off 11) Re-adjust Low light level again.

TH-37PW4 / TH-37PWD4

Color Temp. x y

Cool(Hi) 0.272 0.290

Normal(Mid) 0.288 0.296

Warm(Low) 0.313 0.329

Fig. -03

2 Picture: 1) Change white balance to "Normal".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Normal PANEL W/B

Aspect: R,G,B Drive

16:9

3 Picture: 1) Change white balance to "Warm".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Warm PANEL W/B

Aspect: R,G,B Drive

16:9

4 Picture: Picture Menu 1) Change color templature to "Cool".

Normal Sub Adjust

White balance: Sub Bright 2)Re-set Sub bright to "30"

Cool

Aspect:

16:9

TH-37PW4 / TH-37PWD4

5 Picture: 1) Write down each color temaparature of R,G,B drive and

RGB Gray Scale Pattern

High light 75%

Low light 15% 3) Copy PC R,G,B drive and cut off data of each white

6 Picture: 1) Write down each color temaparature of R,G,B drive and

INPUT Alignment menu ProcedureEquipment Setting

Normal Cut off data as follows.

Aspect:

White balance:

Normal G Drive

Normal Cut off data as follows.

Aspect:

16:9

White Balance Cool Normal Warm

Cool R Drive

Warm B Drive

R Cut off G Cut off B Cut off

2) Input RGB signal.

balance mode to RGB position.

16:9

White

DVI Gray Scale Pattern

White balance:

Cool R Drive

Normal G Drive

Warm B Drive

Balance Cool Normal Warm

R Cut off G Cut off B Cut off

2) Input DVI signal.

High light 75%

Low light 15% 3) Copy PC R,G,B drive and cut off data of each white

balance mode to DVI position.

8.5. HD/ 525i /525p panel white balance

INPUT Alignment menu ProcedureEquipment Setting

1HD(720i or 1080i) Color Picture: 1) Find the nearest area to brightness of 10 cd/m2 as Low

Gray Scale Analyzer Normal Sub Adjust light by color sensor. Pattern White balance: Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m

Cool

exactly.

Aspect: PANEL W/B

16:9 G cut off 3) Set G cut off to " 80 ".

PANEL W/B

B cut off 4) Adjust B and R cut off to set color temperature as R cut off shown Fig.-04.

High light 75% Sub Adjust

Low light 15% Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light

to 10 cd/m

6)Find 75% of white area by color sensor.

PANEL W/B

G Drive 7) Set G Drive to " D8 ".

PANEL W/B

B Drive 8) Adjust B and R Drive to set color temperature

R Drive as shown Fig.-04.

TH-37PW4 / TH-37PWD4

9) Repeat item 4) to 7) to set both Low light and high light.

PANEL W/B

R,G,B Drive 10) Increase same steps of R, G and B Drive to set R,G,B Drive largest level of 3 color drive to "FC".

PANEL W/B

R,G,B cut off 11) Re-adjust Low light level again.

Color Temp. x y

Cool(Hi) 0.272 0.290

Normal(Mid) 0.288 0.296

Warm(Low) 0.313 0.329

Fig. -04

2 Picture: 1) Change white balance to "Normal".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Normal

PANEL W/B

Aspect: R,G,B Drive

16:9

3 Picture: 1) Change white balance to "Warm".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Warm

PANEL W/B

Aspect: R,G,B Drive

16:9

4 Picture: Picture Menu 1) Change color templature to "Cool".

Normal Sub Adjust

White balance: Sub Bright 2)Re-set Sub bright to "30"

Cool

Aspect:

16:9

TH-37PW4 / TH-37PWD4

5 Picture: 1) Write down each color temaparature of R,G,B drive and

RGB Gray Scale Pattern

High light 75%

Low light 15% 3) Copy HD drive and cut off data of each white

INPUT Alignment menu ProcedureEquipment Setting

Normal Cut off data as follows.

Aspect:

White balance:

Normal

16:9

Cool

Warm

White Balance Cool Normal Warm R Drive G Drive B Drive R Cut off G Cut off B Cut off

2)Change input signal to 525i and 525p.

balance mode to each signals position.

8.6. 625i panel balance

INPUT Alignment menu ProcedureEquipment Setting

1 625i Color Picture: 1) Find the nearest area to brightness of 10 cd/m2 as Low

Gray Scale Analyzer Normal Sub Adjust light by color sensor. Pattern White balance: Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m

Cool exactly.

Aspect: PANEL W/B

16:9 G cut off 3) Set G cut off to " 80 ".

PANEL W/B

B cut off 4) Adjust B and R cut off to set color temperature as R cut off shown Fig.-05.

High light 75% Sub Adjust

Low light 15% Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light

to 10 cd/m

6)Find 75% of white area by color sensor.

PANEL W/B

G Drive 7) Set G Drive to " D8 ".

PANEL W/B

B Drive 8) Adjust B and R Drive to set color temperature

R Drive as shown Fig.-05.

9) Repeat item 4) to 7) to set both Low light and high light.

PANEL W/B

R,G,B Drive 10) Increase same steps of R, G and B Drive to set R,G,B Drive largest level of 3 color drive to "FC".

PANEL W/B

R,G,B cut off 11) Re-adjust Low light level again.

TH-37PW4 / TH-37PWD4

Color Temp. x y

Cool(Hi) 0.272 0.290

Normal(Mid) 0.288 0.296

Warm(Low) 0.313 0.329

Fig. -05

2 Picture: 1) Change white balance to "Normal".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Normal PANEL W/B

Aspect: R,G,B Drive

16:9

3 Picture: 1) Change white balance to "Warm".

Normal PANEL W/B

White balance: R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.

Warm PANEL W/B

Aspect: R,G,B Drive

16:9

4 Picture: Picture Menu 1) Change color templature to "Cool".

Normal Sub Adjust

White balance: Sub Bright 2)Re-set Sub bright to "30"

Cool

Aspect:

16:9

TH-37PW4 / TH-37PWD4

8.7. Sub brighness setting

INPUT Alignment menu ProcedureEquipment Setting

1 NTSC Picture: PANEL W/B

Gray Scale Normal All cut off 1) Set white balance to Pattern Aspect:

** Adjust at the dark room.

Cool

16:9 2) Adjust All cut off to start some pixels emission

at black 2% area and no emission at black 0% area.

3) Write down all cut off data.

4) Set white balance to

Black 2 %

Black 0 % 5) Adjust All cut off to set same data of Cool mode.

6) Set white balance to

7) Adjust All cut off to set same data of Cool mode.

** Adjust at the dark room.

2 PAL Picture: PANEL W/B

Gray Scale Normal All cut off 1) Set white balance to Pattern Aspect:

16:9 2) Adjust All cut off to start some pixels emission

at black 2% area and no emission at black 0% area.

3) Write down all cut off data.

4) Set white balance to

Black 2 %

Black 0 % 5) Adjust All cut off to set same data of Cool mode.

6) Set white balance to

7) Adjust All cut off to set same data of Cool mode.

SECAM 8) Change to SECAM signal. Gray Scale Pattern 9) Copy PAL All cut off data to SECAM mode.

Nornal

warm

Cool

Nornal

warm

** Adjust at the dark room.

3 PC Picture: PANEL W/B

Gray Scale Normal All cut off 1) Set white balance to Pattern Aspect:

16:9 2) Adjust All cut off to start some pixels emission

at black 2% area and no emission at black 0% area.

3) Write down all cut off data.

4) Set white balance to

Black 2 %

Black 0 % 5) Adjust All cut off to set same data of Cool mode.

6) Set white balance to

7) Adjust All cut off to set same data of Cool mode.

RGB Gray Scale Pattern

DVI Gray Scale Pattern

8) Change to RGB input signal.

9) Copy PC All cut off data to RGB mode.

10) Change to DVI input signal.

11) Copy PC All cut off data to DVI mode.

Cool

Nornal

warm

Alignment menu ProcedureINPUT Equipment Setting

** Adjust at the dark room.

4 525i Picture: PANEL W/B

Gray Scale Normal All cut off 1) Set white balance to Pattern Aspect:

16:9 2) Adjust All cut off to start some pixels emission

at black 2% area and no emission at black 0% area.

3) Write down all cut off data.

Cool

TH-37PW4 / TH-37PWD4

4) Set white balance to

Nornal

Black 2 %

Black 0 % 5) Adjust All cut off to set same data of Cool mode.

6) Set white balance to

warm

7) Adjust All cut off to set same data of Cool mode.

525p 8) Change to 525p signal. Gray Scale Pattern 9) Copy 525i All cut off data to 525p mode.

HD (720i or 1080i) 8) Change to HD signal. Gray Scale Pattern 9) Copy 525i All cut off data to HD mode.

** Adjust at the dark room.

5 625i Picture: PANEL W/B

Gray Scale Normal All cut off 1) Set white balance to

Cool

Pattern Aspect:

16:9 2) Adjust All cut off to start some pixels emission

at black 2% area and no emission at black 0% area.

3) Write down all cut off data.

4) Set white balance to

Nornal

Black 2 %

Black 0 % 5) Adjust All cut off to set same data of Cool mode.

6) Set white balance to

warm

7) Adjust All cut off to set same data of Cool mode.

TH-37PW4 / TH-37PWD4

9 Trouble shooting guide

9.1. Self Check

9.1.1. 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 front of the set, at the same time pressing the OFF-TIMER button on the remote control, and the screen will show :-

If the CCU ports have been checked and found to be incorrect Or not located then " - - " will appear in place of " OK "

Note:

In case of disconnected of HZ “IC3699 - -” is displayed.

9.1.2. Power LED Flashing timing chart

When an abnormality has occurred the unit, the protection circuit operates and cuts the power supply. At this time, the defective part can be identified by the number of flashes of the Power LED at the front of the unit.

Above Fan function is operated during the fan is set.

9.2. No Power (US model)

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.

1. No lit

2. Red LED Blinking When one or some of supply voltages from power supply circuit are declined red LED will be blinking as power

TH-37PW4 / TH-37PWD4

9.3. No Power (Except US)

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.

1. No lit

2. Red LED Blinking When one or some of supply voltages from power supply circuit are declined red LED will be blinking as power

9.4. No Picture

TH-37PW4 / TH-37PWD4

9.5. Local screen failure

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

Fig - 1

TH-37PW4 / TH-37PWD4

9.6. D-Board

9.6.1. OUTLINE

D board is consists of Analogue and Digital signal process, Discharge control and Micro control block.

D-board is operated by supply voltages of 3.3V, 5V, 13,5V and Standby 5V , RGB analogue (0.7Vp-p) and Sync. Signal. D-board output parallel data video signal with control signal for the data driver circuit, Discharge control signal for Scan and Sustain

drive circuits and Micro control signals.

9.6.2. MAIN IC OPERATION

IC9007 ~ 9009 A/D Converter

RGB analogue signals are converted to 8 bits digital signal.

IC9204 FORMAT CONVERTER (LSI33)

Number of Horizontal line of input signals are converted to 480 lines. This IC uses two clock lines, one is 15M 55MHz for input signal (ICK) and other one is 25M to 40MHz for out put signal. (OCK)

IC9400 PLASMA AI (LSI27)

At first input 8 bit signal data is memorized into two field memory (IC9402, IC9403), Plasma AI analyze APL level and distribution of dark and bright components.

Plasma AI re-arrange 8 bit signal data to 12 bit signal data. This IC also insert OSD (On-Screen Display signal) from Micro.

IC9501 SUB FIELD PROCESSOR

R,G and B 12 bit signal data is layout to fit with each electrodes of panel. One field signal data is separated to upper 240 lines and lower 240 lines. Both upper and lower signals are again separated odd and even number line and output.

9.6.3. DIAGNOSTIC

(1) General

Depend on the phenomenon possible defective section from Signal processing, Discharge control or Micro control section on D-board can be diagnosed as follows.

1. Signal Processing section

a. No picture but panel has discharge. b. Missing R, G or B signal c. Dark Picture. d. No OSD signal. e. Vertical band noise appeared. f. No picture or distortion on 1/4 area on the screen.

2. Micro control section

a. Does not turn on power. b. No panel discharge.

3. Discharge control section

a. No discharge but Micro control is operated. b. Dark picture

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