Toshiba PD42W1E Service Manual Download Page 25 | Manualshive

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Data Driver Circuit

Data Driver Circuit

Digital Process &

Control Circuit

Picture Data

Picture Data

Power Circuit

Sastain

Driver

Circuit

Video Decoder

Interlace/

Progressive

Converter

Analog Signal

Process

Circuit

Audio Circuit

Scan

Driver

Circuit

Line Filter

Signal Input

Video (NTSC, PAL, SECAM)

Component (Y/Pb(Cb)/Pr(Cr)

PC

Discharge Control

Discharge Control

PD42W1 Block Diagram

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Summary of Contents for PD42W1E

Page 1: ...42 PLASMA DISPLAY SERVICE MANUAL PD42W1U PD42W1E FILE NO 350 9902 PRINTED IN JAPAN June 2000 M ...

Page 2: ... 2 ...

Page 3: ...ngs on the plug 2 Turn on the PlasmaDisplay s power switch 3 Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on the Plasma Display such as screw heads connectors control shafts etc When the exposed metallic part has a return path to the chassis the reading should be between 4 M and 20 M When the exposed metal does not have a return ...

Page 4: ...and Blue color phosphors are formed on the data electrode with the ribs However to improve color repro duction and brightness each color phosphors are formed dif ferent width This is called Asymmetrical cell as original technology Front Glass Structure Fig D On the front glass scan and sustain transparent electrodes are mounted in pair The dielectrics is coated on the front grass MgO over coat is ...

Page 5: ...e discharge become small gradually Then any electric charge is cleared Write Fig H Data Pulse which is positive polarity is input to data electrode and Scan pulse which is negative polarity is input to scan electrode simultaneously That means sum of data and scan pulses voltage is applied between two electrodes as discharge start voltage Discharge is started into the pixel and gas is ionized Durin...

Page 6: ...stain pulse is input between sustain and scan electrodes and voltage potential between two elec trodes becomes sum of Sustain pulse and wall voltage Then discharge start Sustain Step 2 Fig K When sustain pulse is stopped Ions and Electrons are remained again as Wall voltage However polarity of wall voltage is reversed Sustain Step 3 Fig L Positive polarity s Sustain pulse is input between sustain ...

Page 7: ...d Therefore depend on sustain discharge time brightness of pixel is controlled Sub Field drive Fig P Sub Field drive is PDP unique system While one TV field period 8 bits digital video signal compo nent is reproduced by 8 sub fields operation Each Sub Field s address period are all same Consist of one initialization and 480 scanning operation But Sustain period of each Sub Field are different 1st ...

Page 8: ...d drive operation which is called Multi Split Sub Field drive control system is used Depend on the picture contents APL Average Picture Level number of sub field are changed from 10 to 12 Vari able Sub field Sustain time format of each sub field are also rearranged from binary format to linear cording sustain time Linear cod ing sub field Plasma AI select the best display condition for Plasma dis ...

Page 9: ...on C2 board Data drive Upper Right P8 board Processing voltage protection C3 board Data drive Lower Right H2 board PC input terminal C4 board Data drive Lower Left F board Line filter SU board Scan out Upper H3 board Speaker terminal SD board Scan out Lower SS2 board Sustain connection Upper SS3 board Sustain connection Lower Remove 6 screws 1 10 screws 2 9 screws 3 4 screws 4 C1 SU C2 C4 C3 F SD ...

Page 10: ...m indicated test point for the specified voltage Test Point Voltage Volume Name P4 pin 1 Hot 400 V 1 V R548 PFC Confirmation Cold P1 pin 10 15 V 0 5 V 15 V P5 pin 1 13 V 0 5 V 13 V P6 pin 1 13 V 0 5 V Audio 13 V P6 pin 3 13 V 0 5 V Audio 13 V P5 pin 5 5 V 0 5 V 5 V P5 pin 8 3 4 V 0 5 V 3 3 V P7 pin 1 14 V 1 V STB 14V P7 pin 6 5 V 0 5 V STB 5 V Adjustments 230 V 110 V P6 board Adjust driver section...

Page 11: ...nt Potentiometer Location Test Point Location R6565 R6501 R6597 R6587 R6754 230V 110V Switch R541 R528 R494 R639 R6654 Panel Data Label TPDA3 TPDA1 TPDA2 TPDA5 TPDA4 TPDA6 TPVSUS TPVE TPSC1 TPSCN TPSET TPSS2 TPSS1 ...

Page 12: ...ance Normal Confirm the indicated test point for the specified wave form Adjust the angle of the erase pulse Adjust the indicated test point for the specified wave form Test Point Volume Name TPSS1 SS Sustain Pulse Test Point Volume Name TPSS1 SS R6754 SS Erase Pulse Test Point Volume Name TPSC1 SC R6565 SC Initialize Pulse TPSC1 SC R6654 SC Initialize Pulse 2 6 sec 1 6 sec 185 V 5 3 sec 205 5 V 1...

Page 13: ...emote control 4 Select the alignment item by the LEFT or RIGHT buttons of the Cross buttons on the remote control 5 Adjust optimum setting by Volume Up and Down buttons The reference figures below are normal and used for representative purpose only Exit 6 To exit the IIC mode press the menu button on the remote control To exit the CAT mode access the ID mode by the down button of cross buttons and...

Page 14: ...l R Y Axis Angle R Y Axis Gain Sub Color DS contrast Sub Contrast SG Hold Sub Tint Pos Size H Position V Position V Size H Size Panel APL ABL APL Shift Level ABL Point ABL Bank select ABL Gain Sub Contrast Panel W B Brightness R Cutoff B Cutoff Contrast Aging Panel Color 0 White 1 Blue 2 Green 3 Red 0 Other 1 NTSC 2 PAL 3 SECAM 4 525i 5 625i 6 525p 7 HD 8 Not used Scroll Bar R Drive B Drive Volume...

Page 15: ...ode and set each Item as follow 2 Record the setting data of Sub Tint and Sub Color 3 Access the SG Hold mode Forced signal system set mode and set the system to NTSC or PAL 4 Return to the Chroma Control mode and copy the Data 2 for each item 5 Repeat item 3 and 4 for SECAM and 525i system Sub color data for SECAM system should be reduced 5 steps from data 2 Alignment Item Reference Setting Speci...

Page 16: ...ta as follows Increase R Drive 30 steps and reduce B drive 35 steps and B cutoff 2 steps from Cool mode 9 Access the SG Hold mode Forced signal system set mode and set the system to NTSC or PAL 10 Return to the Panel W B mode and copy the Data 3 for each item 11 Repeat item 9 and 10 for SECAM system Equipment NTSC or PAL according to the system signal generator Color meter x y Cool High 0 272 0 29...

Page 17: ...1 steps and R cutoff and B cutoff 1 steps from Cool mode Pos Size setting 1 Receive the test pattern signal which can be found the center and edge position and align properly Equipment RGB signal generator Color meter x y Cool High 0 272 0 290 Normal Mid 0 288 0 296 Warm Low 0 313 0 329 Alignment Item Reference Cool Hi Setting Special feature Brightness 66 10cd m2 by 15 RGB signal Set by generator...

Page 18: ...oval Display scroll bar approximately 15 minutes after alignment is completed 1 Access the Scroll bar menu by Left or Right button of cross button and press the STR button 2 To exit press the Menu button Note CAT Computer Aided Test mode Alignment Item Reference Setting Special feature APL Shift Level E2 Confirmation only ABL Point 10 Confirmation only ABL Gain E0 Confirmation only ABL Bank Select...

Page 19: ...2 IC8501 OK H51 IC8516 OK H52 IC8506 OK H53 IC8509 OK H54 IC8002 OK H55 IC8004 OK H51 IC8010 OK H59 IC8013 OK H57 IC8007 OK H58 IC9100 OK H60 IC9210 OK H61 IC9410 OK H62 IC9801 OK H63 IC9804 OK H91 Trouble shooting guide LED Indication 1 The Power LED indicates faulty status of power supply circuit by flashing When one of secondary supply voltage is decreased under 2 3 of original voltage the powe...

Page 20: ... or P1 board What signal Check OSD Check drive pulses DS input HG board D board HG board HG board SC or D board SS or D board RGB Component PC 525p 625p All Input Display OK No SC pulse on TPSC1 No SS pulse on TPSS1 No signal OK Component AV A 15 17 19 A 7 9 Check AV NTSC PAL SECAM Component 525i 625i No signal both SC SS When drive pulses are oscillated correctly slight hum noise can be heard fro...

Page 21: ...em Volume Test point Level P1 board VDA R528 P1 TPDA1 C1 75V 0 5V VSUS R639 P3 TPVSUS SS VSUS 1V VE R494 P1 TPVE SS VE 1V DS board DS contrast IIC mode TP216 0 7 Vp p SC board Vset R6587 TPVSET VSET 0 5V Vscn R6595 TPVSCN 80V 0 5V SS board Erase pulse R6754 TPSS1 Waveform D board Re confirmation of all alignment setting ...

Page 22: ...1 H6 H4 D20 D21 H26 P9 P4 P23 P24 P17 P8 P7 P5 P6 P1 SS1 SS32 C32 C33 S12 S16 SS33 CLAMPER P2 H2 B R G B R G D10 D11 D2 SC20 CLAMPER SC22 H21 S77 S6 SC21 D6 D4 D3 CLAMPER CLAMPER CORE CLAMPER 7 6 5 4 2 1 15 12 14 13 3 8 9 CORE CORE CORE CORE CORE ...

Page 23: ... 36 REMOTE TUNER IN PC IN AV SPEAKERS 8Ω COMPONENT RGB IN P R SEPIAL R VD S VIDEO VIDEO IN OUT AUTO AUDIO 60MHz HD AUDIO P B Y G L R L R B L R 178 15 15 15 15 18 36 129 184 275 234 53 9 To connect the power cord and others refer to the documentation that comes with the Wide Plasma Display Units mm ...

Page 24: ... 3 V 1 2 3 4 5 6 7 8 9 STB 14 V GND RESET TV ON OFF GND STB 5 V RUSH TV FAN SOS PS SOS TEMP DET GND SLL OFF1 FAN SGNS 1 2 3 4 5 6 7 8 9 10 11 12 13 15 V GND 15 V MUTE 13 5 V GND 1 2 3 4 5 6 13 5 V GND ABL GND 5 V GND GND 3 3 V 3 3 V GND 1 2 3 4 5 6 7 8 9 10 STB PS GND ALL OFF1 GND GND 1 2 3 4 5 KEYSCAN GND GND GND GND 1 2 3 4 5 GND KEY GND REMOCON GND STB 5 V LED G LED R 1 2 3 4 5 6 7 8 HD GND VD ...

Page 25: ... Picture Data Power Circuit Sastain Driver Circuit Video Decoder Interlace Progressive Converter Analog Signal Process Circuit Audio Circuit Scan Driver Circuit Line Filter Signal Input Video NTSC PAL SECAM Component Y Pb Cb Pr Cr PC Discharge Control Discharge Control PD42W1 Block Diagram ...

Page 26: ... HG Board S Board Main switch Relay High Voltage converter P3 Board ACFB Control MC33025P TNPA1310 Low voltage Converter P5 Board Resonance Control AN8026 AC80V 264V DC400V P7 Board HV protection TNPA1314 P8 Board LV protection TNPA1315 on off signal Abnormal stop signal P1 Board TNPA1300 PDP Power Block Diagram Relay on off Vcc Supply all off signal ...

Page 27: ...NC RGB VOLTAGE 3 3V SUSTAIN 21 6 PROCESSING PROCESSOR PROTECTOR P PROCESS 5V VOLTAGE P H D 5 INTERLACE 81 VOLTAGE 15V PROTECTOR P 17 7 PROGRESSIVE 15V 71 CONVERTER 13V VPC CIP VSUS AMDP AUDIO Section PRIMARY SUSTAIN VE VSUS 20V RGB DFU CIRCUIT VOLTAGE VDA 70V P H SWITCHCS 17 BBE AUDIO AMP STAND BY 5V H26 H12 H77 H5 H6 H24 H22 H27 H11 PRIMARY 110 230 VOLTAGE SWITCH CONTROL P5 P3 P VIDEO RGB TUNER A...

Page 28: ...cation 26 Cabinet with Filter glass 14 S1 Board AC Cord Power Button 13 39 Bracket 32 28 Front Button 29 V1 Board 15 S2 Board Back cover Bracket 30 Bracket 31 27 Remote Control Transmitter 38 Bracket 33 35 37 36 34 ...

Page 29: ...D Board 3 D Board 20 P8 Board 1 DS Module 2 HG Board 23 H3 Board 5 SC Board 8 C2 Board 18 P6 Board 17 P5 Board 16 P3 Board 22 F Board Fuse 9 C3 Board 25 SS3 Board 19 P7 Board 10 C4 Board 4 P1 Board 21 H2 Board 6 SS Board 24 SS2 Board ...

Page 30: ...Speaker terminal 24 TNPA1418 SS2 board Sustain connection Upper 25 TNPA1419 SS3 board Sustain connection Lower Important Safety Notice Components identified by mark have special characteristics important for safety When replacing any of these components use only manufacturer s specified parts Loc No Parts Number Ref No Description Mechanical Parts 26 TTEA0030 Cabinet with Filter glass 27 TXFKU010N...

Page 31: ...75 Mini DIN 4 pin C 0 286V p p 75 AUDIO IN L R 0 5Vrms RCA pin jack x 2 VIDEO OUT BNC 1 0V p p 75 bridge output COMPONENT Y G RGB 1 0V p p including synchronization PB B 0 35V p p PR R 0 35V p p HD 1 0 5 0V p p VD 1 0 5 0V p p AUDIO IN L R 0 5Vrms RCA pin jack x 2 PC VIDEO High density D sub 15pin AUDIO 0 5Vrms 1 8 3mm mini jack SPEAKERS For external speaker with 8 impedance 8 SERIAL External cont...

Page 32: ...1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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