SERVICE MANUAL
Contents
1. SERVICE MANUAL COLOUR TELEVISION AV 28K T 1BUF AV 28KT1SUF TABLE OF CONTENTS PRECAUTION 1 3 SPECIFIC SERVICE enn 1 4 DISASSEMBLY 1 6 ADJUSTMENT 0000 cece cece cece cece nnn nns 1 10 TROUBLESHOOTING cece eese n 1 23 COPYRIGHT 2003 VICTOR COMPANY OF JAPAN LIMITED No 52137 2003 9 SPECIFICATION Contents Dimensions WxHxD 76cm x 57cm x 47 3cm 33kg B G D K L L lt 9 2 WN lt o Colour System PAL SECAM a PAL SECAM NTSC 3 58 NTSC 4 43 Sound System NICAM A2 Germany system Teletext System FLOF Fastext TOP German system Tuning System Frequency synthesizer tuning system 100 ch 46 25MHz 168 25MHz 175 25MHz 463 25MHz Number of CH memory position lt lt IJI T I o 471 25MHz 863 25MHz 501 541 amp 575 579 38 9MHz B G D K L 33 9MHz 1 33 4MHz 5 5MHz B G 32 9MHz 6 0MHz D K 32 4MHz 6 5MHz L 40 4MHz 6 5MHz L gt lt Frequency SIF PAL 4 43MHz SECAM 4 43MHz NTSC 3 58MHz 4 43MHz 120W Max 3W Standby Input 1V p p 750 Y 1V p p positive C 0 286V p p Audio L R 500mV rms 4dBs High impedance RCA pin jack x 22. 4 2 MEASURING EQUIPMENT 5 Unless otherwise specified prepare the most suitable reception or input signal for adjustment 1 DC voltmeter or digital voltmeter 6 Never touch any adjustment parts which are not specified 2 Signal generator Pattern generator in the list for this adjustment variable resistors PAL SECAM NTSC transformers condensers etc 3 Remote control unit 7 Presetting before adjustment Unless otherwise specified in the adjustment instructions preset the following functions with the remote control unit 4 3 ADJUSTMENT ITEM e SCREEN ADJUSTMENT e DEFLECTION CIRCUIT ADJUSTMENT e WHITE BALANCE ADJUSTMENT 4 4 ADJUSTMENT LOCATIONS T FRONT IC500 MI COM MAIN PWB 1 502 MEMORY HEADPHONE MENU FBT SIDE CONTROL PWB UPPER FOCUS TUNER LOWER SCREEN TU200 1 10 No 52137 4 5 BASIC OPERATION OF SERVICE MENU 4 5 1 HOW TO ENTER THE SERVICE MENU 1 Press the INFORMATION key and MUTING key simultaneously in the main menu and the SERVICE MENU screen Fig 1 will be displayed SERVICE MENU SERVICE gt ADJUST OPTIONS Select for adjustment Do not adjust Fig 1 2 While the SERVICE MENU screen is displayed press the a v and lt gt key and select the ADJUST then ADJUST MENU sucreen Fig 2 will be displayed ADJUST MENU SETTING ITEM No SETTING VALUE Fig 2 4 5 2 SELECTION OF ADJUSTMENT ITEMS
3. 1 Enter the SERVICE MENU and select ADJUST 2 Press the key and select the ADJUSTMENT ITEM 3 Press the lt gt key and set the SETTING VALUE 4 Changed values are stored automatically 4 5 3 HOW TO EXIT SERVICE MODE 1 Press the MENU key REMOTE CONTROL UNIT key NAME MUTING key INFORMATION key MENU key UP DOWN 2 v key LEFT RIGHT lt key RM C1100TV No 52137 1 11 4 5 4 SERVICE MENU SCREEN SERVICE MENU SERVICE ADJUST AK45JA OPTIONS AK45JA ADJUST MENU ADJUST SETTING ITEM SETTING VALUE 000 143 Do Not Adjust OPTIONS MENU OPTIONS kk kkkkkkkk kkkkkkkk kkkkkkkk kkkkkkkk kkkkkkkk kkkkkkkk kkkkkkkk kkkkkkkk kkkkkkkk SETTING ITEM SETTING VALUE 000 063 NOTE Do not adjust the OPTIONS MENU If you change the setting value the set will not function correctly 1 12 No 52137 ADJUSTMENT ITEM adjustment No adjustment part description 000 White Point RED Not used 008 AGC Automatic Gan Conroy Q9 7 014 Verical Bank twil be used only at 4 3 tube Tor 169 mode adustmen 015 Blank Stop It wil be used at 43 tube for 16 9 mode adjustment 00 WoR 000 Video processor adjust itself o
4. 1V p p 750 500mV rms Low Impedance EXT 1 Video Audio RGB EXT 2 Video Audio RGB S VHS Right Side EXT 3 Video Audio Rear Side EXT 1 Video Audio EXT 2 Video Audio Right Side Headphone Jack Stereo mini jack 5 x 1 Remote Control Unit VE 30017763 RM C1100 AA RO6 dry battery x 2 O lt 9 lt Audio L R Rear Side Input Terminal Output Terminal Design amp specifications are subject to change without notice 1 2 No 52137 1 1 SECTION 1 PRECAUTION SAFETY PRECAUTIONS 1 The design of this product contains special hardware many circuits and components specially for safety purposes For continued protection no changes should be made to the original design unless authorized in writing by the manufacturer Replacement parts must be identical to those used in the original circuits Service should be performed by qualified personnel only 2 Alterations of the design or circuitry of the products should not be made Any design alterations or additions will void the manufacturer s warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom 3 Many electrical and mechanical parts in the products have special safety related characteristics These characteristics are often not evident from visual inspection nor can the protection aff
5. 4 No 52137 2 2 FEATURES It is a remote controlled color television 100 programs from VHF UHF bands or cable channels can be preset APS Automatic Programming System All programs can be named Forward or backward automatic tuning It tune cable channels e Sleep timer e Controlling the TV is very easy by its menu driven system Child Lock It has two Euroconnector sockets for external device such as e Blue Background video recorder video games audio set etc e T V Link Side AV Input EXT 3 available Automatic sound mute when no transmission Stereo sound systems German Nicam are available 5 minutes after the broadcasting close down the TV switches Full function Teletext Fastext Toptext itself automatically to stand by mode It is possible to connect headphone WSS Wide Screen Signaling Direct channel access NTSC Playback 2 3 MAIN DIFFERENCE LIST MODEL COLOUR BLACKMODEL SIVERMODEL _ FUNCTION BUTTON VE 20091798 VE 20096498 POWER BUTTON VE 20111864 VE 20120046 E JVC LOGO VE 40013592 VE 40013593 P CARTON BOX VE 50038917 VE 50038907 2 4 DIFFERENCE LIST BY ELECTRONICS Part Name AV 28KT1BUF A AV 28KT1BUF B AV 28KT1BUF C AV 28KT1SUF A AV 28KT1SUF B AV 28KT1SUF C MAIN PWB VE 20120604 VE 20127801 VE 20127796 IC500 MI COM VE 20139901 VE 20137151 VE 20139902 502 MEMORY VE 20120610 VE 20134092 VE 20126318 2 5 DIFFERENCE LIST BY OSD LANGUAGE Bari Name
6. AV 28KT1BUF A AV 28KT1BUF B AV 28KT1BUF C AV 28KT1SUF A AV 28KT1SUF B AV 28KT1SUF C OSD LANGUAGES ENG GER FRE ITA ENG GER FRE SWE ENG GER CZE POL SPA DUT POR TUR NOR DAN FIN GRE HUN BUL ROM CRO No 52137 1 5 SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDULE 1 REMOVING THE REAR COVER 1 Unplug the power cord 2 Remove the 8 screws A as shown in the Fig 1 3 Remove the 4 screws B 4 Withdraw the REAR COVER toward you 3 1 3 1 3 1 2 REMOVING THE BACK DOOR Remove the REAR COVER 1 Remove the 2 screws C 2 Withdraw the BACK DOOR toward you 3 1 3 REMOVING THE SPEAKER e Remove the REAR COVER 1 Remove the 4 screws I and remove the SPEAKER 2 Remove the other hand SPEAKER in the same steps 3 1 4 REMOVING THE MAIN PWB e Remove the REAR COVER Remove the BACK DOOR 1 Remove the 4 screws D 2 Slightly raise the both sides of the MAIN PWB by hand and withdraw the MAIN PWB backward CAUTION If necessary take off the wire clamp connectors etc Be careful enough when developing a MAIN PWB 3 1 5 REMOVING THE SIDE CONTROL PWB e Remove the REAR COVER 1 Remove the 4 screws 2 Remove the SIDE PWB 3 1 6 REMOVING THE BASE e Remove the REAR COVER 1 Remove the 2 screws F 2 Remove the BASE NOTE Work after fixing so that a CRT screen may be placed upside down or it may not fall 3 1 7 REMOVING THE POWER SWITCH PWB e Remove the REAR COVER
7. close as possible 6 Check and readjust 034 item if the adjustment control unit becomes improper after some other geometric adjustments are done 7 Select 114 16 9 mode 8 Adjust 114 in the same procedure SIDE PIN Signal 035 adjustment generator 1 Receive a PAL cross hatch signal 2 Enter the SERVICE MENU 115 16 9 mode 3 Select ADJUST MENU 4 Select 035 5 Adjust 035 till vertical lines close to the both sides of the picture frame become parallel to vertical sides of Parallel picture tube without any bending to left or to right side of the screen 6 Check and readjust 035 item if the adjustment becomes improper after some other geometric adjustments are done 7 Select 115 16 9 mode 8 Adjust 115 in the same procedure Remote control unit EEREN 0 52137 1 19 instrument CORNER Signal 1 ReceiveaPALcross hatchsignal _ Receive a PAL cross hatch signal adjustment generator 2 Enter the SERVICE MENU 037 3 Select ADJUST MENU 4 Select 036 5 Adjust 036 till vertical lines at the upper corners of the picture frame become vertical and parallel to 117 16 9 mode vertical corner sides of picture tube 6 Check and readjust 036 item if the adjustment Straight Straight becomes improper after some other geometric adjustments are done ff 8 Adjust 037 till vertical lines at the lower corners of the icture frame become vertical and parallel to vertical 6
8. lower part of cross hatch pattern become equal 113 16 9 mode to the squares laying on the vertical center of the cross hatch pattern 6 Check and readjust 032 item if the adjustment becomes improper after some other geometric adjustments are done 7 Select 033 8 Adjust 033 till all the size of squares of the cross hatch pattern become in equal size from the top of the screen to its bottom of the whole screen 9 Check and readjust 033 item if the adjustment becomes improper after some other geometric adjustments especially after than S COR adjustment are done 10 Select 112 16 9 mode 11 Adjust 112 in the same procedure as 5 12 Select 113 16 9 mode 13 Adjust 113 in the same procedure as 8 No 52137 1 17 Measuring HORIZONTAL POSITION adjustment HORIZONTAL SIZE adjustment ANGLE adjustment Signal generator Remote control unit Signal generator Remote control unit Screen size Picture size 100 Signal generator Remote control unit 118 16 9 mode 039 119 16 9 mode 1 Receive a PAL circle pattern signal Receive a PAL circle pattern signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 038 5 Adjust 038 to make C D 6 Check and readjust 038 item if the adjustment becomes improper after some other geometric adjustments are done 7 Select 118 16 9 mode 8 Adjust 118 in the same procedure 1 Receive a PAL cross hatc
9. solder adequately 4 Do not reuse a chip part after removing it 3 2 2 SOLDERING IRON 1 Use a high insulation soldering iron with a thin pointed end of it 2 A 30w soldering iron is recommended for easily removing parts 3 2 3 REPLACEMENT STEPS 1 How to remove Chip parts Resistors capacitors etc 1 As shown in the figure push the part with tweezers and alternately melt the solder at each end 2 Shift with the tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead lt SOLDER 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part li After removing the part remove remaining solder from the pattern 1 8 No 52137 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as indicated in the figure A 2 Grasp the chip part with tweezers and place it on the solder Then heat and melt the solder at both ends of the chip part Transistors diodes variable resistors etc 1 Apply solder to the pattern as indicated in the figure 2 Grasp the chip part with tweezers and place it on the solder 3 First solder lead A as indicated in the figure A B C 4 Then solder leads B and C A B C 3 3 SETTING OF THE LAST MEMORY FOR SHIPMENT 3 3 1 USER SETTING
10. 66065 RERE corner sides of picture tube 4 9 Check and readjust 037 item if the adjustment becomes improper after some other geometric Remote control unit 116 16 9 mode adjustments are done Select 116 16 9 mode Adjust 116 in the same procedure as 5 Select 117 16 9 mode Adjust 117 in the same procedure as 8 s 1 dE 1 1 1 1 ROTATION adjustment Enter the SERVICE MENU Select ADJUST MENU Select 083 Adjust 083 to rotate the complete master clock wise and counter clock wise depending on the 6 Check and readjust 083 item if the adjustment becomes improper after some other geometric adjustments are done 0 1 2 3 1 2 3 4 5 Receive PAL cross hatch signal NTSC 1 Receive a NTSC cross hatch signal HORIZONAL generator 2 Enter the SERVICE MENU SIZE 142 16 9 mode 3 Select ADJUST MENU adjustment Remote 4 Select 135 control unit 5 Adjust 135 till vertical lines on both the left and right part of the cross hatch will be visible nor screen will be so wide 6 Check and readjust TRAPEZ item if the adjustment becomes improper after some other geometric adjustments are done 7 Select 142 16 9 mode 8 Adjust 142 in the same procedure Screen size Picture size 100 1 20 No 52137 instrument NTSC S
11. F rng eve oe 09 REGULAR VERT POS Wertcal Postion 1 09 JREGUARVERT AWPL Verical Ampitude REGULAR VERT_SCOR Vertical 055 REGULAR VERT_SSYM Vertical S Symmetry D 04 05 096 REGULAR HOR_COR_SYMiHorzonial ComerSymmety 0 REGULAR HOR_CORNER Horizontal _ D o 095 REGULAR HORZ_POS Horizontal Postoy o 059 REGULAR HORZ_AWPL Horizontal Amplitude No 52137 1 13 description Not used mwa 06 63Z00MHORCORSW 09 6SZ0OMHORZAMPL 09 osoren BoTHRBeamoweniwesod OOOO O OoOO SSO 02 BolGBeamcmenkopgam O O o ora 09 REFERENCE WDR RED NORMA O oo o o 099 REFERENCEWDRGREEN NORMA o o REFERENCE WDR BLUE pov 1 14 No 52137 description 9 GLWORREFERENE 10 POFSPRGBHORZANTALSHET OOOO O O Soo REFERENCE O O O OSS o 109 REFERENEEWORGRENCOOL 30 Q REFERENEWDRBUECOOL 104 JREFERENDEWDRREDWARM 105 REFERENCE 106 JREFERENDEWORBLUEWARM O O 30 STANDARDMODEBRIGHINESS 30 STANDAMDMODECOLOUR o o 30 STANDARDMODEGONTRAST O O O SSS 10 LVERTPOSQGSMOD Com m 5 F LGUHON 6 ULHORCO
12. RSM 7 9 LHORLAML OOO S 3m BRIGHTMODEBRGHINESS 3m JNGHTMODECOUR SSS BNGHTMODECONTRAST SOFTMODEBRIGHINESS SOFTMODGOLUR SSS 5 SOFTMODCONIRMST 39 SONCFORPANORMCMODE O o o o 39 SONCIFORPANORAMGMODE o o 19 ae O 85 3RGBHORZONTALAVPUTUDE 16 42d FULRGBHORZONTALAMPLTUDE _ 4 TELETEXT HORIZONTAL POSTION O No 52137 1 15 4 6 ADJUSTMENT PROCEDURE 4 6 1 FOCUS SCREEN ADJUSTMENT instrument FOCUS Signal FOCUS VR 1 Receive PAL cross hatch signal a PAL cross hatch signal adjustment generator On the FBT Adjust FOCUS VR the FBT as thin as possible Remote control unit FOCUS VR SCREEN VR SCREEN Remote SCREEN VR 1 Enter the OPTIONS MENU adjustment control unit On the FBT 2 Select option No 002 and change bit 6 from 0 to 1 disabling vertical scan Then horizontal line appears 3 Adjust horizontal line as thin as possible via screen adjust pot 4 Press number 0 key to leave service menu 4 6 2 AGC ADJUSTMENT Measunng Tosi point Adjustment part Description instrument AGC 1 Receive a PAL BG signal at 60dBuV RF signal level signal at 60dBuV RF signal level adjustment Enter the SERVICE MENU Select 003 Adjust 003 by pressing till voltage at pin 1 of TUNER is equal to 3 0V 1 2 3 Select ADJ
13. Remove the BASE 1 Remove the 2 screws G and remove the POWER SWITCH PWB 3 1 8 REMOVING THE LED PWB e Remove the REAR COVER Remove the BASE e Remove the POWER SWITCH PWB 1 Remove the 2 screws H and remove the LED PWB 1 6 No 52137 3 1 9 CHECKING THE PW BOARD To check the back side of the PW Board 1 Pull out the PW Board Refer to REMOVING THE MAIN PWB 2 Erect the PW Board vertically so that you can easily check the back side of the PW Board 3 1 10 CAUTION e When erecting the PW Board be careful so that there will be no contacting with other PW Board Before turning on power make sure that the wire connector is properly connected e When conducting a check with power supplied be sure to confirm that the CRT EARTH WIRE BRAIDED ASS Y is connected to the CRT SOCKET PW board 3 1 11 WIRE CLAMPING AND CABLE TYING 1 Be sure to clamp the wire 2 Never remove the cable tie used for tying the wires together Should it be inadvertently removed be sure to tie the wires with a new cable tie REAR COVER PWB SIDE CONTROL Gm SPEAKER NT ak soo x2 Fig 1 POWER SWITCH PWB No 52137 1 7 3 2 REPLACEMENT OF CHIP COMPONENT 3 2 1 CAUTIONS 1 Avoid heating for more than 3 seconds Do not rub the electrodes and the resist parts of the pattern 2 3 When removing a chip part melt the
14. UST MENU 4 5 control unit Volt meter 1 16 No 52137 4 6 3 DEFLECTION CIRCUIT ADJUSTMENT Tosi point instrument VERTICAL Signal 1 Receive a PAL circle pattern signal POSITION generator 2 Enter the SERVICE MENU adjustment 110 16 9 mode 3 Select ADJUST MENU Remote 4 Select 030 control unit 5 Adjust 030 to make A B 6 Check and readjust 030 item if the adjustment becomes improper after some other geometric adjustments are done 7 Select 110 16 9 mode 8 Adjust 110 in the same procedure VERTICAL SIZE Signal 031 adjustment generator 1 Receive a PAL cross hatch signal 2 Enter the SERVICE MENU 111 16 9 mode 3 Select ADJUST MENU 4 Select 031 5 Adjust 031 until horizontal black lines on both the upper and lower part of the cross hatch pattern very COSG become very closeted the upper and lower horizontal sides of picture size and nearly about to disappear 6 Check and readjust 031 item if the adjustment Picture becomes improper after some other geometric Mos adjustments are done 7 Select 111 16 9 mode 8 Adjust 111 in the same procedure Remote control unit Very close VERTICAL 1 Receive a PAL cross hatch signal 2 Enter the SERVICE MENU amp LINEARITY 3 Select ADJUST MENU adjustment Remote 4 Select 032 control unit 112 16 9 mode 5 Adjust 032 till the size of squares on both the upper and
15. VALUES Setingiem Setting Vale Setingitem Setting Value FEATURE MENU The procedure for setting APS 3 3 2 SETTING A P S AUTO STORE 1 Press MENU key on the remote control unit to display the main menu 2 Press 4 keys to select PROGRAM item them lt keys to display the PROGRAM menu Press the BLUE key to enter the AUTOSTORE mode Press keys to choose the COUNTRY then press lt gt keys the choose country you are nou located Press 2 keys to choose the CONTINUE then press gt key to start A P S The following message appears NOTE To cancel the A P S press the STANDARD key 6 After A P S is finalized the PROGRAM menu appears again 7 Press STANDARD key to exit main menu omm AN 3 4 5 No 52137 1 9 SECTION 4 ADJUSTMENT Seting tem Sening value 4 1 ADJUSTMENT PREPARATION 1 You can make the necessary adjustments for this unit with either the Remote Control Unit or with the adjustment tools SENTER and parts as given below 2 Adjustment with the Remote Control Unit is made on the COLOUR basis of the initial setting values however the new setting values which set the screen to its optimum condition may SHARPNESS differ from the initial settings COLOUR TEMP 3 Make sure that AC power is turned on correctly ZOOM AUTO 4 Turn on the power for set and test equipment before use and start the adjustment procedures after waiting at least
16. apacitor between an exposed metal part and a known good earth ground water pipe etc Measure the AC voltage across the resistor with the AC voltmeter Move the resistor connection to each exposed metal part particularly any exposed metal part having a return path to the chassis and measure the AC voltage across the resistor Now reverse the plug in the AC outlet and repeat each measurement Any voltage measured must not exceed 0 75V AC r m s This corresponds to 0 5mA AC r m s However in tropical area this must not exceed 0 3V AC r m s This corresponds to 0 2mA AC r m s AC VOLTMETER HAVING 10000 OR MORE SENSITIVITY 0 15uF AC TYPE PLACE THIS PROBE ON EACH EXPOSED 15000 10W METAL PART GOOD EARTH GROUND No 52137 1 3 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2 1 21 pin Euro connector SCART 1 EXT 2 Pin No Signal Designation Matching Vaie _ 500mV rms Nominal Low impedance 4 Ud d SLOW SW High impedance wg ud Ud _ 1 sanyo f used SOL eme 759 soa Nhwd om OO ud jmd _ M ud jd C 300MV p p 75 Q FAST SW High 1V 3V 75 Q 7 jNDVDEOamd Jd 1 Umd d P P Peak to Peak B W Blanking to white peak Pin assignment 20 18 16 14 12 10 8 6 NJUUUUUUUUL JUUUUUUUUOU 21 19 17 1517311 9 7 5 1
17. can cause an increase in X Ray emission arcing and possible component damage therefore operation under excessive high voltage conditions should be kept to a minimum or should be prevented If severe arcing occurs remove the AC power immediately and determine the cause by visual inspection incorrect installation cracked or melted high voltage harness poor soldering etc To maintain the proper minimum level of soft X Ray emission components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product 7 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kQ 2W resistor to the anode button 8 When service is required observe the original lead dress Extra precaution should be given to assure correct lead dress in the high voltage circuit area Where a short circuit has occurred those components that indicate evidence of overheating should be replaced Always use the manufacturer s replacement components 9 Isolation Check Safety for Electrical Shock Hazard After re assembling the product always perform an isolation check on the exposed metal parts of the cabinet antenna terminals video audio input and output t
18. ctively 5 Adjust 023 024 and 025 respectively until the white part turns to pure white without any other colour 1 Receive a PAL cross hatch signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 026 027 and 028 respectively 5 Adjust 026 027 and 028 respectively until the black part turns to pure black without any other colour 1 Receive a PAL colour bar signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 006 5 Adjust 006 till the colour transients on the colour bar pattern becomes as sharper and possible as colours between transients do not mix with each other 1 Receive a SECAM colour bar signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 007 5 Adjust 007 by pressing till the colour transients on the colour bar pattern becomes as sharper and possible as colouers between transients do not mix with each other 1 Receive a NTSC colour bar signal from an external source e g FRONT AV EXT 3 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 008 5 Adjust 008 by pressing till the colour transients on the colour bar pattern becomes as sharper and pos sible as colouers between transients do not mix with each other SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING No 52137 1 23 JVC VICTOR COMPANY OF JAPAN LIMITED AV amp MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12 3 cho
19. erminals Control knobs metal cabinet screw heads earphone jack control shafts etc to be sure the product is safe to operate without danger of electrical shock a Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC r m s for a period of one second Withstand a voltage of 1100V AC r m s to an appliance rated up to 120V and 3000V AC r m s to an appliance rated 200V or more for a period of one second This method of test requires a test equipment not generally found in the service trade b Leakage Current Check Plug the AC line cord directly into the AC outlet do not use a line isolation transformer during this check Using a Leakage Current Tester measure the leakage current from each exposed metal part of the cabinet particularly any exposed metal part having a return path to the chassis to a known good earth ground water pipe etc Any leakage current must not exceed 0 5mA AC r m s However in tropical area this must not exceed 0 2mA AC r m s Alternate Check Method Plug the AC line cord directly into the AC outlet do not use a line isolation transformer during this check Use an AC voltmeter having 10000 per volt or more sensitivity in the following manner Connect a 15000 10W resistor paralleled by a 0 15uF AC type c
20. h signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 039 5 Adjust 039 until vertical lines on both the left and right part of the cross hatch will be visible nor screen will be so wide 6 Check and readjust 039 item if the adjustment becomes improper after some other geometric adjustments are done 7 Select 119 16 9 mode 8 Adjust 119 in the same procedure 1 Receive a PAL cross hatch signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 016 5 Adjust 016 till the vertical lines of the cross hatch pattern become straight 6 Check and readjust 016 item if the adjustment becomes improper after some other geometric adjustments are done 1 18 No 52137 instrument BOW Signa 1 Receive a PAL cross hatch signal adjustment generator 2 Enter the SERVICE MENU 3 Select ADJUST MENU Remote 4 Select 017 control unit 5b Adjust 017 till the vertical lines become straight 6 Check and readjust 017 item if the adjustment becomes improper after some other geometric adjustments are done NOTE In case where there is a bow shaped distortion of images on the screen Figure 1 Receive a PAL cross hatch signal adjustment 2 Enter the SERVICE MENU 114 16 9 mode 3 Select ADJUST MENU 4 Select 034 5 Adjust 034 till vertical lines especially lines at the sides of the picture frame become parallel to the Parallel both sides of picture tubes as
21. igal generator adjustment Remote control unit TELETEXT SCREEN adjustment control unit Description 1 Receive a NTSC cross hatch signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 136 5 Adjust 136 till vertical lines close to the both sides of the picture frame become parallel to vertical sides of picture tube without any bending to left or to right side of the screen 6 Check and readjust 136 item if the adjustment becomes improper after some other geometric adjustments are done 1 Receive a PAL cross hatch signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 143 5 Adjust 143 to adjust the proper vertical size of Teletext screen 6 Check and readjust 143 item if the adjustment becomes improper after some other geometric adjustments are done No 52137 1 21 4 6 4 VIDEO CIRCUIT Measuring WHITE BALANCE adjustment COLOUR CUTOFF LEVEL adjustment PAL Y DELAY adjustment SECAM Y DELAY adjustment NTSC Y DELAY adjustment 1 22 No 52137 Signal generator Remote control unit Signal generator Remote control unit Signal generator Remote control unit Signal generator Remote control unit Signal generator Remote control unit 1 Receive PAL black amp white signal Receive a PAL black amp white signal 2 Enter the SERVICE MENU 3 Select ADJUST MENU 4 Select 023 024 and 025 respe
22. me Moriya cho kanagawa ku Yokohama kanagawa prefecture 221 8528 Japan No 52137 Ve Printed in Japan WPC
23. orded by them necessarily be obtained by using replacement components rated for higher voltage wattage etc Replacement parts which have these special safety characteristics are identified in the parts list of Service manual Electrical components having such features are identified by shading on the schematics and by A on the parts list in Service manual The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock fire or other hazards 4 Don t short between the LIVE side ground and ISOLATED NEUTRAL side ground or EARTH side ground when repairing Some model s power circuit is partly different in the GND The difference of the GND is shown by the LIVE L side GND the ISOLATED NEUTRAL side GND and EARTH side GND Don t short between the LIVE side GND and ISOLATED NEUTRAL side GND or EARTH side GND and never measure the LIVE side GND and ISOLATED NEUTRAL side GND or EARTH side GND at the same time with a measuring apparatus oscilloscope etc If above note will not be kept a fuse or any parts will be broken 5 If any repair has been made to the chassis it is recommended that the B1 setting should be checked or adjusted See B1 POWER SUPPLY check 6 The high voltage applied to the picture tube must conform with that specified in Service manual Excessive high voltage
Download Pdf Manuals
Related Search