NEC PG-2740 Скачать руководство пользователя страница 61

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NEC

f'/r.

C&C

for

Human

Potential

PRINTED

JAPAN

630MI9402

01136981

(PG-2740)

Содержание PG-2740

Страница 1: ...Y CAUTION Before servicing this chassis it is important that the service technician read and follow the Safety Precautions and Product Safety Notice in this Service Manual For continued X radiation protection repiace picture tube with original type or NEC approved equivalent type WARNING SHOCK HAZARD Use an isolation transformer when servicing NEC Corporation TOKYO JAPAN ...

Страница 2: ...igh Voltage Protector Adjustment 5 Video Chroma Circuit Adjustment 5 1 PAL Comb Filter Adjustment 5 2 Sub Bright and Sub Contrast Adjustments 5 3 PAL Matrix Adjustment 5 4 Auto Phase Control Adjustment 6 Horizontal Width Adjustment 7 Vertical Linearity Adjustment 8 Vertical Height Adjustment 9 Side Pin Cushion Adjustment 10 Kystone Adjustment 11 Image Tilt Correction 12 White Balance Procedure 13 ...

Страница 3: ...2 2 PWC 3838 V CRT PWB PWC 3834 HCOMA PWB 1 3 PWC 3839 HCOM V PWB 2 3 PWC 3839 COM V PWB 3 3 PWC 3839 DEF HV PWB 1 2 PWC 3846 DEF HV PWB 2 2 PWC 3846 DEF SUB PWB 1 2 PWC 3856A DEF SUB PWB 2 2 PWC 3856A MAIN POWER SUPPLY PWB PWC 3815A SUB POWER SUPPLY PWB PWC 3851B C D H OUT PWB PWC 3856B SW LED PWB PWC 3838B 39 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 ...

Страница 4: ...be read carefully in order to avoid any problems 4 4 8 11 ATTENTfON a 8 RISQUE D ELECTROCUTION NE PAS OUVRIR 8 ATTENTION POUR EVITER LES RISQUES D ELECTROCUTION NE PAS ENLEVER LE COUVERCLE OU LE DOS AUCUN DES ELEMENTS INTERNES NE DOIT ETRE REPARE PAR L UTILISATEUR NE GONFIER LENTRETIEN QUA UN PERSONNEL QUALIFIE Le point d exclamation dans un triangle Equi lateral est destinE E attirer Tattention d...

Страница 5: ...ead and apply the high voltage limits and if the chassis is so equipped the X radiation protection circuit specifications given on instrument labels and In the Product Safety X radiation Warning note on the service data chassis schematic High voltage is maintained within specified limits by close tolerance safety related components adjust ments In the high voltage circuit If high voltage exceeds s...

Страница 6: ...picture tubes are equipped with a per manently attached deflection yoke because of poten tial hazard do not try to remove such permanently attached yokes from the picture tube il k 8 PRODUCT SAFETY NOTICE Many TV electrical and mechanical parts have special safety related charac teristics some of which are often not evident from visual inspection nor can the protection they give necessarily be obt...

Страница 7: ...rde cheque fois que I entretien s occupe du B de la ddviation horizon tale ou de la haute tension II faudra aussi s assurer du bon fonctionnement des circuits de protections anti Rayons X cheque fois qu ils seront amends en entretien les circuits de protections anti Rayons X pourront aussi bien dtre appelds horizontal disable ou hold down Lire et appliquer les limi tations de haute tension et si l...

Страница 8: ...nence au tube k images 7 Les composants parts pieces et ou fils qui ont ete trouves surchauffes devraient dtre remplacds avec les composants pieces et fils s y reliant avec d autre qui ont les memes specifications que les originales De plus rechercher la cause du surchauffement et ou des dommages et si necessaire prendre les mesures propres pour prevenir tout risque potentiel 8 Note sur la sOrete ...

Страница 9: ...erscan Display Area t Horizontal 4 2 psec Vertical 0 55 msec Retrace Time AC 120 V 60 Hz Power Supply 3 5 A maximum Power Consumption 645 W X 530 H x 520 D mm 25 39 W X20 98 H 20 39 D Inches Dimensions Weight 54kg 119 1 lbs Environmental Considerations Operating Temperature 0 C to 40 C Humidity 0 to 90 Altitude 0 10X 00 feet Storage Temperature 10 C to 55 C Humidity 0 to 90 Altitude 0 45 000 feet ...

Страница 10: ...omposite video signal Sync negative Y 1 OVp p 75 Ohm unbalanced Sync negative C 0 28Vp p 75 Ohm unbalanced Color burst level Left Mono 0 5 Vrms high impedance Pin Jack Right 0 5Vrms high Impedance Pin Jack Audio Input Terminols VIDEO 1 2 RGB Left 0 5 0 1 Vrms less than 22 K Ohm Pin Jack Right 0 5 0 1 Vrms less than 22 K Ohm Pin Jack Audio Output Terminals THROUGH OUT D SUB 9pln INAHROUGH OUT Exter...

Страница 11: ... signals from components connected to the VIDEO 2 Input terminal BNC type or S VIDEO 2 IN Indicates the VIDEO 1 button is set to re ceive signals from components connected to the VIDEO 1 Input terminal BNC type or S VIDEO 1 IN VIDEO 2 Indicator I STANDBY Indicator VIDE011ndicator unit Indicates the RGB 2 button is set to re ceive signals from components connected to the RGB 2 input terminals R G B...

Страница 12: ...IX VARI Select Switch 0 VIDEO 2 Use to select either FIX or VARI setting It should normally be set to the FIX position When adjusting the clamp pulse position by using CLAMP CTL set to the VARI position To be adjusted by service personnel only Turn to adjust the clamp pulse position To be adjusted by service personnel only Turn to adjust each gain for Red Green and Blue NOTE S VIDEO IN terminals w...

Страница 13: ...H CS and V THROUGH 0UT BNC R RGB AUDIO IN Connect the audio right channel output of the RGB component Connect to a second monitor s RGB inputs to relay the RGB signal inputs at R G B M CS and V IN L RGB AUDIO IN MONO Connect the mono audio or stereo left chan nel output of the RGB component 75 O HIGH Innipedance Select Switch Set to 75 O during normal operation In mul tiple connections using R G B...

Страница 14: ...t to a second monitor s S CONNEC TOR input to relay the video signal input at S VIDEO 1 IN VIDEO 2 VIDEO 2 IN BNC 75 O HIGH Impedance Select Switch Connect external component video output here Connect external component with S CON NECTOR output here Connect to a second monitor s video input to relay the video signal input at VIDEO 2 IN Set to 75 O during normal operation In mul tiple connections u...

Страница 15: ...ors together and allows all of the monitors to be controlled by one remote control 0 EXTERNAL CONTROL THROUGH OUT Connect to a second monitor s EXTERNAL CONTROL input to relay the signal input at the EXTERNAL CONTROL IN 0 The EXTERNAL CONTROL THROUGH OUT terminal is used to connect several monitors together up to 50 and allows all of the monitors to be controlled by one external control No 7 pin E...

Страница 16: ...er to shorter Adjusts the curvature of the edges of the left and right side of the display image either in ward or outward The image should be ad justed to attain a straight line on the left and right sides RoanroH VDEO A A A e HEIGHT Q O CCKnOSTBRlCKT COLOR TNT BttIUREB SIDE PIN CED 0 NORMAL USER PRESET MUTE VOLUME DATA MONTTOR RO 3S5E nunoi NEC POSITION A Adjusts the vertical position of the Ima...

Страница 17: ...key characters may be Invisible in a bright lit room Make sure that the backlight switch is OFF when the remote control unit is not used If no button operation Is made within 30 seconds when the backlight switch is ON in the wireless condition the backlight go off automatically To turn the backlight on again set the switch to the OFF position then set it to the ON position i 0 USER PRESET Press to...

Страница 18: ...tment of high tension protector DEF SUB DEF HV PWB unit 5 Video Chroma Circuit Adjustment 5 1 PAL Comb Filter Adjustment 5 2 Sub Bright and Sub Contrast Adjustments 5 3 PAL Matrix Adjustment 5 4 Auto Phase Control Adjustment 6 Horizontal Width Adjustment 7 Vertical Linearity Adjustment 8 Vertical Height Adjustment 9 Side Pin Cushion Adjustment 10 Keystone Adjustment 11 Image Tilt Correction 12 Whi...

Страница 19: ... signal to CHI of your oscilloscope 2 Connect CH2 s probe to TP8701 and TP GND1 3 Adjust VR8701 H SYNC FREE RUN ADJ so that CHI and CH2 are in sync with each other Note This is a free run adjustment so do NOT input video signal to monitor for this adjustment 3 Vertical Oscillation Adjustment 3 1 DEF SUB PWB Vertical Oscillation Adjustment 1 Input VGA3 480 line to either RGB1 or RGB2 input 2 Short ...

Страница 20: ...ith DHHS requirements 5 Video Chroma Circuit Adjustment 5 1 PAL Comb Filter Adjustment 1 Input the PAL color bar signal 2 Set the Video Select SW to PAL 3 Connect the oscilloscope to TP7003 on the Video PWB 4 Adjust VR7101 and T7101 and set the chroma signal component to the MIN position Note VR7101 T7101 and TP7003 on the Video PWB PWC 3838A 5 2 Sub Bright and Sub Contrast Adjustments 1 Input the...

Страница 21: ...that amplitudes of No 1 and No 2 are as shown below I B B 12 3 4 12 3 4 i 5 Adjust T7401 Delay Matching Adj so that amplitudes of No 1 and No 2 are as shown below B B i 12 3 4 12 3 4 5 4 Auto Phase Control Adjustment 6 Adjust VR7401 APC so No 3 and No 4 are linear as shown below B B 12 3 4 12 3 4 7 Lower the brightness and check that there are no bars Repeat steps 4 to 6 when and as needed Set adj...

Страница 22: ... or V Height to MAX position 3 Adjust the VR4002 of the DEF SUB PWB so that the vertical amplitude becomes 100 scan 9 Side Pin Cushion Adjustment 1 Input the VGA 480 line mode 2 Press the NORMAL button of the remote control raster control system 3 Set the Scan Select SW in the UNDERSCAN mode and adjust the remote control so that the vertical Note 95 1 scan means that there are two black vertical s...

Страница 23: ...respectively Note If the black and blanking levels have collapsed increase the brightness to increase their amplitude 16 Next perform Bias VR control tracking Remove the scope probe from the cathode 17 Input NTSC 1 4 Window white pattern Using a Minolta TV2130 CA 100 or similar light meter set the monitor s light output to 30 cd m with the Remote Control Contrast Key Next Adjust VR8401 Red VR8402 ...

Страница 24: ...o signal to the center overscan 7 2 using the H WIDTH UP DOWN key V HEIGHT UP DOWN key H POSITION LEFT RIGHT key and V POSITION UP DOWN key 7 Next press the Remote Control NORMAL key to store these new values 8 Next input the PAL monoscope signal and repeat steps 2 to 7 by setting the Video I O PWB NTSC PAL Switch accordingly Note Either Videol or Video2 can be used for this step 9 Next Input VGA2...

Страница 25: ... 3 556 22 222 UNDER 0 027 V ms 0 607 17 778 0 057 15 84 VESA 60Hz 800 X 600 H is 20 0 1 0 26 4 3 2 2 2 UNDER V ms 16 579 0 106 0 607 0 026 15 84 VESA 72Hz 800 X 600 H tis 20 8 2 4 1 28 16 0 1 12 f UNDER 0 77 V ms 0 478 13 853 0 125 12 48 VESA 60Hz 1024 X 768 H tis 20 677 2 462 15 754 0 369 2 092 UNDER V ms 16 667 0 062 0 124 0 6 15 88 SYNC ON GREEN MAC II 13 inch H is 28 57 3 17 22 81 0 18 2 12 OV...

Страница 26: ...ore new data Note When connect the wire between pin 1 and pin 7 of connector JB NORMAL key which usually operates as a read function i e preset data read back into user memory now serves a as write function storing writing new data into preset memory area 6 Repeat Steps 2 5 for VIDEO 2 and save data 7 Input NTSC Split field signal to adjust RGB I O PWB VR872 SUB BRIGHT 8 Set Remote Control CONTRAS...

Страница 27: ... on white background 2 Adjust the Remote Control Scan select to UNDERSCAN 95 3 Set the CONTRAST and BRIGHTNESS in the normal state 4 Set VR901 VR located to the side of the cooling fan to the mechanical center 5 Adjust FBT mounted FOCUS1 control for optimum center focus performance 6 Next Adjust VR901 to balance top and bottom focus performance 18 High Voltage Protector Circuit Operation Verificat...

Страница 28: ...o UJ 5 c 3 8 CL C 5 o IL Z o O CC CO CO u u o u o UJ U z UJ UJ UJ o z 3 u S8 0 o rx r o o 9 at cx CO d ro o n H UJ o o o IX CO o o 8 z UJ z UJ i CD i UJ CD o o I I UI o u CL a X i VJ z UJ oc X CO X NJ o M M X UI CO H CVJ CD cc o o o Q rx H I o I f Q VJ I I X I I o rx UJ UJ o T T or u o T z T GO GO 0 CO H UI z z o 0 1 UI t 3 o j 15 o _ v Ci3 1 1 Ui CO z I u UJ UJ CD p i cn cr I I UJ 0 q 2a o UI z U...

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Страница 30: ...l i 0 UJ o f V_ Hi O s a S r i V Ui X 1 0 H c 0 i 05 f I a a Ui O II J mJ S cu Ui Co 0 QO H vl M U4 K V h sl V J Hi i V CQ CO N II it iC f S9 G w Ui 5 I UJ S OQ t c j Uj UJ c o I 1 K Ui 9 iei i r w C i QC iy tie sv I 9h VJI Ui VJ Volvo I i I fc P G o Va ly 5 51 u I Q i i Ui J Cj I 5 Ui I l tsj 5 f vO 4 t i vO u s A ol M r t ci 3 5 cC 0 si O o 3 5 X 27 ij ...

Страница 31: ...inoia 60191 1 1 1255 Michael Drive Wood Dale Uiinoia 6019t VV I I Serial No I i I ooo 5 o e MAMO niGiCi hfic Model No AAA Serial No Uiinoia 60191 OOO 0AAMOMAMO VJC G 0 0 1 Model No AAA Model No 0 AAA Strlsl No OOO I ItnA 125o Michael Drive Wood Date i l c I f Serial No OOO Description 1255 Mkfwwi tfUve UUnola I 5 M 1 I A Display Contents and Display Points The specified display of Model No serial ...

Страница 32: ...HS card by removing the labels and 1 i Model No Serial No Description u o o o ra Cl CJ n 1 c o s AAA o o o CS Mode No Serial No Description c w a n u c o CO 1 1 AAA O J o Model No Serial No O O O c o i I l CL o r ro 1 VP i o o Oi o Model No Serial No O O O Description i CJ CO CJ OL r i Front I D Application to Terminal Fitting Strip i Remove the left shown at left from the cardboard and apply it t...

Страница 33: ... jj I rs hr I I I I 1 5 Mfch Drjyi iWoocrt ald M lllirfbis 0l9J l 1 I r eriaj No fi I M t I J I v RAN MB eC i in I 1 I Front t 66 I Mfloel m D t I I Si i 5 Mict i urty 1 iV I I eria No I a D u I UKhois I d I rmr I ia I TiTTTTT Li I z f E 2 Left Side Remove the label shown at left from the cardboard and apply it to the right top on the left side of the cardboard But apply the label without removing...

Страница 34: ...he label to the right top on the right side of the cardboard with it laid to the right 6 I r f f Serial number label printed 242948D w Model No Serial No Deoeription 1 I 4 D Model No Serial No Deoeription Si DHHS card 24L2949D Model No Seriol No Deoeription i i w I I Model No i I 1 Polyethylene bag DHHS 24M0291D I I CAUTION TO DEALERS AND DISTRIBUTORS This product comes under ru i 24M02911 i J I I...

Страница 35: ...43001 Plug Cable 4M 73499229 Registration Card 78046212 User s Manual 78405011 Remote Controller 7964 2701 Spacer T 24MT765D Protection bag 24M0908D Wrap from the set top or bottom and secure it by taping Set body I Spacer B 24MT766D I Front Cardboard box PG 2740 24MT767D 32 ...

Страница 36: ...e bar code serial label 1676179 and apply it to the back of the cardboard I 4 i Serial number Commodity code M o f 3 4 9 8 M cJc OOOOc 3if V Model number I j 9 ri I j 1 About 50 t 1 I I U r i 1 1 I I J r r t Rear I I I I 3 r i y I 4 f ll 33 ...

Страница 37: ...9 DS OS DCS 007 28 o LE9 EB10 DU 0EF SU8 PWB PWC EB10 O0F3 0E7 AZ3 RF7 Eon E011 OU 28 RH7 EA8 EA8 RG11 RG11 DEF HV PWB i PWC OEF3 EF3 0H3 DYH X6 D 0V3 DYV oo RGB I O PWB RV10 777 GROUND TYPE PART SPAIRAL RGB PWB PWC RA12 RS9 RK6 r C V CRT PWB C 3834 R g rb r r r i RB11 RE3 RC8 R02 G02 002 XA1 O FOCUSVR XB1 O FOCUSVR 777 GROUND TYPE PART GREEN HE2 BRACKET CRT EARTH GROUND TYPE PART BLACKx2 CABINET ...

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Страница 59: ...A C5451 56000 6KV RS4S3 R9491 HA3 10 1 33K 1 4H B TTT CS452 llOOOp i 6K RS454 777 100 HCl HC2 C TO DEFAIV PHB HC XhC3 05453 2SK2223 01 Q5454 2SC399B H OUT HBl 05491 CUT G30R I 6000D T 1 8KV C9454 C5455 L 6000D X i flxv CS457 43000D 1 25KV AhB2 TO DEF HV PWB HB AhB3 777 777 C c Th HFl r RL5451 66C 1114P HF2 TO OEF HV PWB 777 HF AhF3 77T D C 56 ...

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Страница 61: ... I I I r I l I f i i f I I t NEC i y f r C C for Human Potential I I V I I 1 I I I PRINTED IN JAPAN 630MI9402 01136981 PG 2740 1 ft ...

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