JVC AV-1438 User's Manual
Contents
1. 14 1435 AV 1435EE AV 1435TEE AV 14FMT3 AV 1438 AV 14FMG3 AV 14FMG3B JVC SERVICE MANUAL COLOUR TELEVISION AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14FMT3 AV 1438 AV 14FMG3 AV 14FMG3B AV 14FMG3 A Commen ry 7 2 RM C90 RM C364G Y RM C364 CONTENTS B SPECIFICATIONS PIC B SAFETY PRECAUTIONS ects HH hh Ih eee ee ee eee 4 B FEATURES irae ye ius B FUNCTIONS B MAIN DIFFERENCE LIST B SPECIFIC SERVICE INSTRUCTIONS B SERVICE ADJUSTMENTS B PARTS LIST Fua NE OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM 554249 2x 4skkn eau d us thru AE 4 WN wo A N 1 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN LTD No 52026 Jun 2002 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B SPECIFICATIONS ITEM Dimensions W X D 462mm X 340 5mm X 375mm TV RF System RF Mode Colour System VIDEO Mode CONT ENTS EEE AV 44FMG3TAV 14FMG3B 1435 AV 1435TEE 4 ss B G DK B G D K M PAL SECAM PAL SECAM NTSC3 58 NTSCA 43 PAL SECAM NTSC3 58 NTSCA 43 Teletext System FLOP Only for AV 14 35TEE FLOP RT for AV 14 FMT3 Picture Tube Visible size 34cm measured diagonally High Voltage Receiving2. When NTSC 3 58 is set NTSC 4 43 will be automatically set at the respective values 24 No 52026 Adjustment of TINT I Adjustment of TINT II Measuring instrument Signal generator Remote control unit Signal generator Oscill Scope Remote control unit Test point Adjustment part 6 TINT NTSC 3 58 TINT NTSC 4 43 TINT TP 47G R 6 TINT TP E CRT SOCKET PWB NTSC 3 58 TINT NTSC 4 43 TINT AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B Description Method of adjustment without measuring instrument 1 Input a NTSC 3 58 full field colour bar signal 75 white 2 Enter the SERVICE MENU 3 Select 2 VIC from SERVICE MENU 4 Select 6 TINT withthe MENU V A key 5 Set the initial setting value of NTSC 3 58 with the MENU key 6 If you cannot get the best tint with the initial setting value make fine adjustment until you get the best tint When NTSC 3 58 is set NTSC 4 43 will be automatically set at the respective values Method of adjustment using measuring instrument 1 Input a NTSC 3 58 full field colour bar signal 75 white 2 Enter the SERVICE MENU 3 Select 2 VIC from SERVICE MENU 4 Select 6 TINT withthe MENU V A key 5 Set the initial setting value of NTSC 3 58 with the MENU key 6 Connect the oscilloscope between TP 47G R and TP E 7 Adjust NTSC 3 58 TINT to bring the value of B in the
3. control unit Remote 4 CONT control unit Remote 5 COLOUR control unit PAL COLOUR SECAM COLOUR NTSC 3 58 COLOUR NTSC 4 43 COLOUR AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG Description 1 Receive any broadcast 2 Enter the SERVICE MENU 3 Select 2 VIC from SERVICE MENU 4 Select 3 BRIGHT with the MENU 5 Set the initial setting value with the MENU key 6 If the brightness is not the best with the initial set value make fine adjustment until you getthe best brightness 1 Receive any broadcast 2 Enter the SERVICE MENU 3 Select 2 V C from SERVICE MENU 4 Select 4 CONT with the MENU W Akey 5 Setthe initial setting value with the MENU key 6 If the contrast is notthe best with the initial set value make fine adjustment until you get the best contrast Method of adjustment without measuring instrument 1 Receive a PAL broadcast 2 Enter the SERVICE MENU 3 Select 2 VIC from the SERVICE MENU 4 Select 5 COLOUR with the MENU V A key 5 Set the initial setting value for PAL COLOUR with the MENU key 6 If the colour is not the best with the initial set value make fine adjustment until you get the best colour 1 Receive a SECAM broadcast 2 Make fine adjustment of SECAM COLOUR as previously 1 Receive a NTSC 3 58MHz broadcast 2 Make similar fine adjustment of NTSC 3 58 COLOUR as previously When NTSC 3 5
4. Akey and set the correct value with the MENU key 5 Press the DISPLAY key twice and retum to the normal screen 5 Receive channel of setting Refer to the OPERATING INSTRUCTIONS and set the receive channels channels preset as described 6 User Setting Check the user setting value of Table 2 and if setting value is different set the correct value For setting refer to the OPERATING INSTRUCTIONS 7 Setting of SERVICE MENU Verify the setting items of the SERVICE MENU and reset where necessary For setting refer to the SERVICE ADJUSTMENTS wore Although the key position ofthe RM C90 remote control unitis different from that of the RM C364GY amp RM C354 remote control unit the functions of both units are the same So please use the attached diagram for the RM C90 remote control unit for the RM C364G Y amp RM C364 By the way MENU 4 Key functions in the same manner as for 4 key KEY ASSIGNMENT OF REMOTE CONTROL UNIT fW SENSOR POWER Gy SYSTEM COLOUR SOUND MUTING DISPLAY key iw MENU 4 key PICTURE MODE key NUMBERS 7 key CHANNEL RETURN CHANNEL VOLUME RM C90 No 52026 SERVICE MENU 1 F 2 3 DEF 4 VSM PRESET 5 PRESET 6 SETUP TOUR OFF 1 6SELECT DISP EXT seek kkk Fig 1 SYSTEM CONSTANT I SYSTEM CONSTANTSET 1 COLOUR BILINGUAL NO TUNER MU ECO SENSOR YES
5. the PICTURE MODE key CONT 4 Adjust the MENU V A and MENU key to bring the set SHARP values of TINT SHARP to the values shown in the below table 5 Respectively select the VSM PRESET mode for SOFT and STANDARD and make similar adjustment as in3 above e VSMPRESET BRIGHT VSM BRIGHT STANDARD SOFT Cy TNT Setting Item COLOUR THT COLOUR SHARP SELECT omae ose CONT 15 lt 11 12 28 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG PURITY CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT 1 Demagnetize CRT with the demagnetizer UNS DEFLECTION Loosen the retainer screw of the deflection yoke Remove the wedges Input i i put a green raster signal from the signal generator and turn 46 the screen to green raster P C Move the deflection yoke backward ee P C MAGNETS P PURITY MAGNET 4 4POLES convergence magnets 6 6 POLES convergence magnets Bring the long lug of the purity magnets on the short lug and position them horizontally Fig 2 Adjust the gap between two lugs so that the GREEN RASTER will come into the center of the screen Fig 3 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green Ins ert the wedge to the top side of the deflection yoke so that it will not move PURITY MAGNETS Input across hatch signal Verify that the scree
6. the SERVICE MENU then select 1 CUT OFF G and 4 Set each value to initial setting value with 44 9 keys of the remote control unit 5 Press the 1 key of the remote control unit to show the single horizontal line on screen 6 Turn the SCREEN VR fully counter cloc kwise then slowly turn it clockwise to where one of a red blue or green colour is faintly visible 7 Use keys 4 9 of the remote control unit and adjust the other 2 colours which except the appeared colour to where the single horizontal line appears white 8 Turn the SCREEN VR to where the single horizontal line glows faintly 9 Press the 2 key to turn off the single horizontal line 10 Press the DISPLAY key twice to retum to the normal screen R 1 428 027 0 B 1 CUT OFF 1 Input a black and white signal colour off 2 Enter the SERVICE MENU 3 Select 2 VIC from the SERVICE MENU 4 Select 2 DRIVE B wth MENU V A key and set each value to initial setting value with 4 and 7 or 6 and 9 keys of the remote control unit 5 Use the keys 4 and 7 or 6 and 9 to produce a white screen 6 Press the DISPLAY key twice to retum to the nomal screen Variable Initial setting Adjustment item range value R 126 127 128 127 2 DRIVE 22 52026 Adjustment of SUB BRIGHT Adjustment of SUB CONT Adjustment of SUB COLOUR I Measuring i instrument Test point Adjustment part Remote
7. 38 AV 14F MG3 AV 14FMG 32 No 52026
8. 5MHz 5 5MHz AV 14FMT3 B G D K M SECAM 33 5MHz 4 5MHz E R AIP NTSC3 58 NTSCA 43 31 5MHz 6 5MHz 32 0MHz 6 0MHz No 52026 7 14 1435 1435 1435 AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG SPECIFIC SERVICE INSTRUCTIONS REMOVING THE REAR COVER 1 Unplug the power plug 2 As shown in figure remove the 4 screws marked screw marked 3 Withdrawthe rear cover toward you REMOVING THE MAIN PW BOARD After removing the rear cover 1 Slightly raise the both sides of the MAIN PW BOARD by hand and remove the PWB stopper marked D from the front cabinet 2 Withdrawthe MAIN PW BOARD backward If necessary take off the wire clamp connectors etc REMOVING THE SPEAKER After removing the rear cover 1 Asshownin figure remove the 2 screws marked B 2 Follow the same steps when removing the other hand speaker CHECKING THE MAIN PW BOARD 1 Tocheck the back side of the PW Board 1 Pull out the MAIN PW Board Refer to REMOVING THE MAIN PW Board 2 Erect the PW Board vertically so that you can easily check the back side of the PW Board CAUTION When erecting the PW Board be careful sothat there will be no contacting with other PW Board Before turning on power make sure that the CRT earth wire and other connector are properly connected WIRE CLAMPING AND CABLE TYING 1 Be suretoclamp the wire 2 Never remove the cable tie use
9. 8 adjustment completed NTSC 4 43 will be automatically set at the respective values No 52026 23 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B Item Adjustment of SUB COLOUR E Measuring 7 Test point Adjustment part instrument Signal TP 47G R 5 COLOUR generator Oscillo TP E scope CRT SOCKET PWB PAL COLOUR Remote control unit SECAM COLOUR NTSC 3 58 COLOUR NTSC 4 43 COLOUR Description Method of adjustment using measuring instrument 1 Input a PAL full field colour bar signal 75 white 2 Enter the SERVICE MENU 3 Select 2 VIC from SERVICE MENU 4 Select 5 COLOUR with the MENU V A key 5 Setthe initial setting value of PAL COLOUR with the MENU key 6 Connect the oscilloscope between TP 47G R and TP E 7 Adjust PAL COLOUR to bring the value of A in the illustration to 12V W G Voltage value between W and G 1 Input a SECAM full field colour bar signal 75 white 2 Setthe initial setting value of SECAM COLOUR with the MENU key 3 Adjust SECAM COLOUR to bring the value of A in the illustration to 10V W G Voltage value between W G 1 Input a NTSC 3 58 full field colour bar signal 75 white 2 Set the initial setting value of NTSC 3 58 COLOUR with the MENU key 3 Adjust NTSC 3 58 COLOUR to bring the value of A in the illustration to 10V W G Voltage value between W and G
10. Do Not Adjust No 52026 13 1 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG REPLACEMENT OF IC301 IF DECODER For IC301 IF DECODER of this model all data are written the micro computer So write the data in the micro computer in accordance with the following procedures before starting adjustment PROCEDURES 1 Turnthe POWEROFF 2 Replace the IC301 with anew one 3 While pressing MENU button and VOL button ON the FRONT CABINET simultaneously turn the POWER ON When the POWER is turned ON the datais written inthe micro computer immediately LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS m JVC jonoon 0 1L MENU HANNEI OLUME 3 EXIT ON VER PO ER MENU buttons CHANNEL buttons MENU buttons VOLUME buttons MENU buttons Al ECO sensor REMOTE CONTROL sens ON TIMER lamp POWER lamp MAIN POW ER button AHAAA elo OD 9 14 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG SERVICE ADJUSTMENTS BEFORE STARTING SERVICE ADJUSTMENT 1 There are 2 way of adjusting this TV One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components The adjustment with the REMOTE CONTROL UNIT is made on the basis of the initi
11. ERVICE MENU The following adjustment items use the SERVICE MENU in the series of the adjustment The adjustments are made on the basis of the initial setting values The adjustment values which adjustthe screen to the optimum condition can be different from the initial setting values With the SERVICE MENU various settings can be made and they are broadly classified in the folowing items of settings ANNE E Adjustment of the IF circuits 2M IG den nob non Adjustment of the VIDEO CHRO MA circuit SIDER ree eerte Adjustment of the DEFLECTION circuit 4 VSM PRESET 0000 Adjustment of the initial setting values of VSM condition as STANDARD SOFT and BRIGHT VSM Video Status Memory SPRESET oes eter ee yess Adjustment of the RF circuit Do not adjust 6 SETUP TOUR OFF It should be able to select mode LANGUAGE and AUTO CH PRESET Should be OFF 9 Key operation of the SERVICE MENU SERVICE MENU Enter to SERVICE MENU Press the DISPLAY key and the PICTURE MODE key of the REMOTE CONTROL UNIT simultaneously Then enter the SERVICE MENU mode as shown in Fig 1 SERVICE ME NU 2 Exit from SERVICE MENU 3 DEF 4 VSM PRESET 5 PRESET When complete the adjustment work press the DISPLAY key to return to the Se TORET SERVICE MENU 16 5 DISP EXT And then press the DISPLAY key again return to the normal screen kk Select fro
12. F SERVICE MENU 1 Adjustment of the SERVICE MENU is made on the basis of the initial setting values however the new setting values which set the screen in its optimum condition may differ from the initial setting 2 Do notchange the initial Setting Values of the Setting Adjustment items not listed In ADJUSTMENT Initial setting value Variable range NTSC 4 43 CUT OFF GREEN 18 127 BLUE 2 DRIVE 128 127 BLUE 3 BRIGHT 127 127 4 CONT 63 63 wo AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14F MG3B AV 14F MG3 A 17 Fixed 8 SHARF DoNot Adj VIDEO 10 Fixed 3 DEFLECTION Setting item Variable range TCS Dwewemm xm _ 0 9 4 VSM PRESET VSM preset mode BRIGHT STANDARD SOFT TINT SETTING VALUE No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 5 PRESET The items in the following table it is no requirement for adjustment If values had changed by the miss operation setthe initial setting values in the following table Colour System Do Not Adjust Initial setting value Fixed value Setting item SECAM NTSC 3 58 NTSC 4 43 EHI 7 C BPF 9 VIF DETLEVEL 11 IF AGC MIN 12 VIF AGC 13 VIF PMOD 19 VNR 20 RGB LIM 21 RGB LIMIT LEVEL 23 TEXT H POSITION Sound System
13. Frequency VHF VL VHF VH UHF CATV VIF Carrier Intermediate Frequency SIF Carrier Colour Sub Carrier Frequency Power Input Rated Voltage Power Consumption Speaker Audio Output Aerial Input Terminal Output Hea dphone jack Remote Control Unit 22 5kV 1 5kV at zero beam current 46 25MHz 168 2 5MHz 175 25MHz 463 2 5MHz 471 25MHz 863 2 5MHz Cable TVs of Mid X Z 51 510 Super S11 S20 amp Hyper S21 S41 bands receivable 38 0MHz 32 5 2 5 5MHz 31 5MHz 6 5MHz 32 0MHz 6 0MHz PAL 4 43MHz SECAM 4 40625MHz 4 25MHz NTSC 3 58MHz 4 43MHz 32 5MHz 5 5MHz 33 5 MHz 4 5MHz 31 5MHz 6 5MHz 32 0MHz 6 0MHz AC110 240V 50 60Hz 68W 47W Avg cm X 9 cm Oval type X 2 2W monaural 759 Unbalanced 1V p p 759 Front Rear 500mV rms AdBs High impedance 1V p p 759 500mV rms 4dBs Low impedance 3 5mm mini jack AV 14F3 AV 1435 AV 1435EE RM C364G Y AV 1435TEE RM C90 Battery size R06 UM 3X 2 aay po E AV 14F MG3 14 AV 1438 RM C364G Y AV 14F MG3B RM C364 AV 14F MT 3 RM C90 Battery size ROG UM 3 X 2 Design and specifications are subject to change without notice 2 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG EE PRECAUTIONS The design of th
14. LANGUAGE Dok V A SELECT OPERATE DISP EXIT SYSTEM CONSTANT SYSTEM CONSTANTSET 2 B B SOUND OFF LOCK 180 COLOUR AUTO 055 MINT ALC NO TEXT RATE 20 WA SEL OPEDISP EXIT SYSTEM 8 SYSTEM CONSTANTSET 3 AMP TUNER NO VNR YES TEXT TABLE VOLUM PWM POS V A SEL OPEDISP EXIT Fig 2 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B SETTING OF SYSTEM CONSTANT SET Setting value ae AV Setting item Setting contents AV AV AV AV AV AV AV AV 14 1435 1435EE 1435TEE 14FMT3 4438 14FMG3 14FMG3B TRIPLE YEs gt NO BILINGUAL 1 C YES Y NO xj Al SENSOR ER ER MI LANGUAGE 4 SOUND souno 7 SN QEF ELLE ER A P 2 YES 4 10 4 20 LOCK 250 9240 lt gt 230 lt n 1 ne eee t f 211 nep rin rnnt Ae ee 1 i Table 1 USER SETTING VALUES Setting item Setting value Setting item Setting value VNR OFF ON SCREEN DISPLAY OFF PAL PR 010 OFF Table 2 No 52026 11 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B INITIAL SETTING VALUE O
15. NSITIVITY PLACE THIS PROBE ON EACH EXPOSED 1500 Q 10W METAL PART GOODEARTH GROUND AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B FEATURES New chassis design enables use of an interactive on screen control Wide range voltage 110V 240V AC power input With AUDIO VIDEO INPUT amp OUTPUT terminal MUTING button can reduce the audio level to zero instantly Functional remote control to operate T V set for channel select volume control power ON OFF etc from a distance bus control utilizes single chip ICs for IF V C DEF VSM PRESET PRESET amp SETUP TOUR By means of AUTO PROGRAM the TV stations can be selected automatically and the TV channels can also be rearranged automatically The TELETEXT SYSTEM has a built in FLOP system Only for AV 1435TEE AV 14FMT3 Built in ECO MODE ECONOMY ECOLOGY In accordance with the brightness in a room the brightness and of contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye Built in ON TIMER RETURN amp CHILD LOCK SYSTEM BLOCK DIAGRAM 01 VIDEO CHROMA DECORDER 702 701 SCL1 SDA1 MICRO COMPUTER 821 TEXT DECORDER Only for AV 1435TEE AV 14FMT3 4 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG FUNCTIONS E FRONT PANEL MENU buttons 2 CHANNEL
16. Please use signal generator which is correct proof about the sending frequency Remote ontro unit 1 Input the PAL full colour bar 210 25 2 signal 2 Enter the SERVICE MENU 3 Select 1 IF fromthe SERVICE MENU VCO CW sek MHz 4 Press 1 key andselect 1 VCO TOOHIGH 5 Select VCO ADJUST with MENU ABOVE REFERENCE 6 Press MENU key until the colour of the characters TOO JUST REFERENCE BELOW REFERENCE HIGH changes blue to yellow Then gradually press the MENU TOOLOW key until the TOO LOW changes yellow At this time confirm AFT ADJUST that the value of VCO ADJUST is near 00 VODABMIST 7 Select AFT ADJUST with MENU A V key 8 Press MENU key until the characters JUST REFERENCE Do notadiust changes blue to yellow 9 Press the DISPLAY key three times to return to normal screen JUSTREFERENCE BELOW REFERENCE TOO LOW ADJUST MENT ATTHS POINTISUSE ADJUST MENT POINT 20 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B Measuring instrument Test point Adjustment part Description Adjustment Signal DELAY POINT 1 Input a black and white signal colour off of DELAY generator TAKE OVER 2 Enter the SERVICE MENU POINT Remote 3 Select 1 IF from the SERVICE MENU AGC control unit 4 Select 2 DELAY POINT by pressing the 2 key on the remote control unit 5 Setthe setting values of the setting items as shown bellowtabl
17. V A SEECT OPERATE DISP EXIT SUB MENU 5 PRESET PRESET PAL 1 C TRAP HX 50Hz BIK V A 5 1 OPERATE DISP EXIT 18 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B ADJUSTMENT LOCATIONS CRT SOCKET PWB SOLDER SIDE TP 47R G TP 47G R D 702 821 DEG 9 Only for AV 1435 TEE AV A4FMT3 5 1 91 1 UPPER FOCUS 2Pin NC LOWER SCREEN 3Pin X ray2 4Pin X ray1 5Pin TP E No 52026 19 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B ADJUSTMENTS B1 POWER SUPPLY Measuring instrument Test point Adjustment part Description Check of Signal TP 91 B1 1 Input a whole black signal 5 ied generator 4 2 Connect a DC voltmeter to 91 1 and TP E Be Nol 3 Make sure that the voltage is DC116 5 2 0V meter FOCUS ADJUSTMENT Measuring instrument Test point Adjustment part Description Adjustment Signal FOCUS VR 1 Input cross hatch signal of FOCUS generator In HVT 2 While watching the screen adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible 3 sure that when the screen is darkened the lines remain in good focus IF CIRCUIT ADJUSTMENT Measuring instrument Test point Adjustment part Description Adjustment Signal ofVCO CW generator Q
18. age 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 10 2W resistor to the anode button 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 No 52026 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 terminals Control knobs metal cabinet screwheads earphone jack control shafts etc to be sure the product is safe to operate without danger of electrical shock 1 Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user particularly any expos ed metal part having a retum 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
19. al setting values The setting values which adjust the screen to its optimum condition may differ from the initial setting values Make sure that connection is correctly made to AC power Source Turn on the power of the set and equipment before use and start the adjustment procedures after waiting at least 30 minutes Unless otherwise specified prepare the most suitable reception or input signal for adjustment 6 Never touch any adjustment parts which are not specified in the list for this adjustment VRs transforms condensers etc Preparation for adjustment Unless otherwise specified in the adjustment instructions preset the following functions with the REMOTE CONTROL UNIT User mode position PICTURE MODE VSM BRIGHT VNR OFF TINT COLOUR BRIGHT CONT SHARP CENTER BLUE BACK OFF OFF TIMER OFF Al ECO SENSOR OFF AUTO SHUT OFF OFF MEASURING INSTRUMENT AND FIXTURES 1 2 DC voltmeter or digital voltmeter Oscilloscope 3 Signal generator Pattern generator PAL SECAM NTSC 4 Remote control unit ADJUSTMENT ITEMS Adjustment item B1 POWER SUPPLY FOCUS adjustment IF circuit adjustment Video Chroma circuit adjustment No 52026 Adjustment item VSM PRESET setting DEFLECTION circuit adjustment PURITY CONVERGENCE adjus tment 15 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B BASIC OPERATION OF SERVICE MENU The adjustment using S
20. buttons 3 VOLUME buttons Q ECO sensor 5 REMOTE CONTROL sensor 6 ON TIMER lamp 7 POWER lamp MAIN POWER button 9 AV INPUT terminal 1 HEADPHONE jack AV 1 438 OQ BREAR TERMINAL CD ANT Terminal 2 VIDEO INPUT Terminal 3 VIDEO OUTPUT Terminal E E OT A 4 AUDIO INPUT Terminal 5 AUDIO OUT PUT Terminal No 52026 5 14 1435 1435 1435 AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B E REMOTE CONTROL UNIT RM C90 AV 1435TEE AV 14FMT3 ECO SENSOR key 2 COLOUR SYSTEM key 3 SOUND SYSTEM key 9 DISPLAY key 8 00 O OFFTIMERKey 7 D PICTUREMODEKey 777 RETURN Ry 44944 Gi CHANNEL F ky GD POWERKy 00 QQ MTNGKy IVTEXTKey 0 MENU key MENU A Y key MENU key 18 Number CH key 0 VOLUME key 9 Teletext key SYSTEM COLOUR SOUND MUTING lt 3 AEVAEL HOLD INDEX UBPAGE CANCEL a RM C364GY AV 14F3 1435 AV 1435EE AV 1438 AV 14FMG3 14 RM C364 AV 14FMG3B 1 ECO SENSOR key SOUND SYSTEM key COLOUR SYSTEM key 4 TV VIDEO key 5 OFF TIMER key 6 CHANNEL SCAN key RETURNt key DISPLAY key 44 VOLUME E O PICTURE MODE key JVE cou
21. d for tying the wires together Should it be inadvertently removed be sure to tie the wires with new cable tie 8 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B FRONT CABI SN E seer 2 PWB STOPPER No 52026 9 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B REPLACEMENT OF MEMORY ICs 1 MEMORY ICs This model uses memory Cs This memory IC data are for proper operation of the video and deflection circuits When replacing memory ICs be sure to use ICs written with the initial values of data 2 PROCEDURE FOR REPLACING MEMORY ICs 10 1 Power off Switch the power off and disconnect the power plug from the wall outlet 2 Replace ICs Be sureto use memory ICs written with the initial data values 3 Power on Connect the power plug into the wall outlet and switch the power on 4 Check and set SY STEM CONSTANT SET It must notadjust without adjustment signals 1 Press the DISPLAY key and the PICTURE MODE key of the REMOTE CONTROL UNIT simultaneously 2 The SERVICE MENU screen of Fig 1 will be displayed 3 While the SERVICE MENU is displayed again press the DISPLAY key and PICTURE MODE key simultaneously and the SYSTEM CONSTANT SET screen of Fig 2 wil be displayed 4 Check the setting values of the SYSTEM CONSTANT SET of Table 1 If the value is different select the setting item with the MENU W
22. e 6 Then adjust the MENU or key until video noise disappears 7 to other channels and make sure that there are no imegularities DELAY POINT UHF AGCTAKE OVER OPERATE DISP EXIT Setting Item Variable range Initial setting value MATSUSHITA NTSC 3 58 QAUO287 001 DELAY POINT 02127 45 35 52026 21 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B VIDEO CHROMA CIRCUIT ADJUSTMENT The setting adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values The setting values which adjustthe screen to the optimum condition can be different from the initial setting values Do notchange the initial setting values of the setting items not listed in ADJUSTMENT Measuring instrument Test point Signal 1 generator Adjustment of WHITE BALANCE Low light CUT OFF R CUT OFF G Remote CUT OFF B control unit SCREENVR IN HV T 50Hz WI SELECT 1 OPERATE KEY ASSIGNMENT REMOTE CONTROL UNIT CUTOFF OFF HUNE OFF GCUTOFF B CUTOFR A B DRVE A B CUTOFR v B DRVE GCUTOFF y Signal generator Adjustment of WHITE BALANCE High light 2 DRIVE R DRIVE B Remote control unit 50Hz V A SELECT 1 OPERATE Adjustment part Description 1 Input a black and white signal colour off 2 Enter the SERVICE MENU 3 Select 2 VIC from
23. he kind of signals vertic al frequency 50Hz 60Hz When adjusted in mode 1 mode 2 will be automatically s et The setting adjustment usin gthe REMOTE CONTROL UNIT is made on the basis ofthe initial setting values The setting values which adjust the screen to the optimum condition can be different from the initial settin g values Measuring instrument Test point Adjustment part Description Adjustment Signal 1 VER POSITION 1 Input a circle pattem signal of V HEIGHT generator 3 VER HEIGHT 2 Enter the SERVICE MENU amp Remote 3 Select 3 DEF from SERVICE MENU V POSITION control unit 4 Select 1 VER POSITION withthe MENU V A key 5 Setthe initial setting value with the MENU key SUB MENU 3 DEF 6 Adjust V and V to be equal with the MENU key as shown in Fig 2 7 Input a cross hatch signal DEF 8 Select 3 V HEIGHT with the MENU V A key 1 VER POSITION 9 Set the initial setting value with the MENU key 10 As shown in Fig 1 adjust VER HEIGHT and make the vertical screen size 92 of the picture size with the MENU keys of V A SE ECT remote control unit 1 OPERATE DISP EXIT Screen size Screen Picture size 10096 T 1 Picture sze 100 Fig 1 Adjustment 2 HOR POSITION 11 Input a circle pattern signal of HOR generator 12 Select 2 HOR POSITION with the MENU V A key POSITION 13 Set the initial setting va
24. ilustration 9V W Cy Voltage value between W and Cy When NTSC 3 58 is set NTSC 4 43 will be automatically set at the respective values No 52026 25 1 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG Measuring instrument Testpoint Adjustment part Adjustment Remote 7 5 of SECAM Control unit BL ADJUST BLACK Signal OFFSET generator KEY ASSIGNMENT OF REMOTE CONTROL UNIT Description Method of adjustment using measuring instrument 1 Input a SECAM fullfield colour bar signal 2 Enter the SERVICE MENU 3 Select 2 VIC from SERVICE MENU 4 Select 7 SECAM BL ADJUST with MENU V A 5 Setthe initial setting value with the MENU key 6 Switch the Okey colour OFF and key colour ON on the remote control and make sure that there is no colour on the black and white screen T If the black and white screen is not best with the initial setting value make fine adjustment until you get the best black and white screen 8 While watching the screen adjust the value to be the same colour between ON amp OFF by ten key on the remote control unit 9 Press the DISPLAY key twice to retum to the normal screen 26 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B DEFLECTION CIRCUIT ADJUSTMENT 9 There 2 modes of adjustment setting value D 50Hz mode and 2 60Hz mode depending upon t
25. inthe service trade 2 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 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 1000 ohms per volt or more sensitivity in the following manner Connect a 15000 10W resistor paralleled by a 0 1 5pF AC type capacitor 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 retum 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 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 ACVOLTMETER HAVING 1000 OR MORE SE
26. is 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 thos e used in the original circuits Service should be performed by qualified personnel only 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 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 afforded 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 the schematics and 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 Don t short between the LIVE side ground and ISOLATED NEUTRAL side ground
27. lue of 2 HOR POSITION with the MENU key 14 Adjust 2 HOR POSITION to make HzH as shown in Fig 2 with the MENU key control unit No 52026 27 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B Measuring 2 instrument Test point Adjustment part Description Adjustment Signal 4 VER LIN When the vertical linearity has been deteriorated of VER LIN generator 5 VER SCURVE remarkably perform the following steps amp VER Remote 15 Input a cross hatch signal SCURVE control unit 16 Select 4 VER LIN with the MENU V A key 17 Setthe initial setting value of 4 VER LIN with the MENU key 18 Select 5 VER SCURVE with the MENU V A key 19 Setthe initial setting value of 5 VER SCURVE with the MENU key 20 Adjust 4 VER LIN and 5 VER SCURVE so that the spaces of each line as shown in Fig 3 on TOP CENTER and BOTTOM become uniform Make sure that the adjustment is properly done on the screen of 60Hz mode NOTE Adjust to make both 50Hz amp 60Hz are the same v size and fine straight line When adjust again adjust 50Hz mode first When adjust in 60Hz mode only 60Hz mode is adjust VSM PRESET SETTING Measuring Test point Adjustment part Description instrument Setting of Remote TINT 1 Enter the SERVICE MENU VSM control unit COLOUR 2 Select 4 VSM PRESET fromthe SERVICE MENU PRESET BRIGHT 3 Select BRIGHT with
28. m SERVICE MENU In SERVICE MENU press the number 1 6 key of the remote control unit to select Fig 1 any of the adjustment items The colours which selected item characters are changed KEY ASSIGNMENT OF REMOTE CONTROL UNIT KEY ASSIGNMENT OF REMOTE CONTROL UNIT ECO SENSOR COLOUS SOUND MUTING 2 29 12 COLOUH SOUND PICTURE MODE key DISPLAY key a TV VIDEO OFF NUMBERS PICTURE CHANNEL SCAN CHANNEL VOLUME Stee TEXT OOO C2 RM C364GY REVEL HOLD INDEX SUE RM C90 RMC 364 Except for difference in body colour the Remote Control Unit RM C364GY and RM C364 have exactly the same Functions 16 No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG Method of setting 1 VCO 1 Key LSR O Select 1 IF Qo 1 Key T EE E V E S BS CIT Select 1 VCO 8 The VCO CW screen will be displayed a allow mark when the AFC voltage is at a certain level DISPLAY you press this key twice you will return to SERVICE MENU 2 DELAY POINT D 1 Key RALEN Select 1 IF Q 2Keys e Select 2 DELAY POINT MENU Key t n Set adjust the setting values of the setting items 4 DISP LAY Key ea are ates EEATT When this is pre
29. n is horizontal Shortlug Bring the long lug over the short lug and position them horizontally Fig 2 Input red and blue raster signals and make sure that purity is properly adjusted FRONT VIEW GREEN RASTER CENTER Fig 3 No 52026 29 AV 14F3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 1438 AV 14F MG3 AV 14FMG 3B STATIC CONVERGENCE ADJUSTMENT 1 Input a cross hatch signal Using 4 pole convergence magnets overlap the red and blue lines in the center of the screen Fig 1 and tum them to magenta red blue FRONT VIEW Using 6 pole convergence magnets overlap the magenta red blue and green lines in the center of the screen and turn them to white Repeat 2 and 3 above and make best convergence FRONT VIEW DYNAMIC CONVERGENCE ADJUSTMENT RED GREEN BLUE 1 Move the deflection yoke up and down and overlap the lines the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make best convergence After adjustment fix the wedge at the original position FRONT VIEW Fasten the retainer screw of the deflection yoke Fix the 6 magnets with glue 30 No 52026 CAUTIONS Avoid heating for more than 3 seconds Do not rub the electrodes and the resist parts of the pattern When removing achip part melt the solder adequately Do not re
30. 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 55 side GND and EARTH side GND Dont short between the LIVE side GND and ISOLATED NEUTRAL side GND or EARTH side GND and never measure with a measuring apparatus oscilloscope etc the LIVE side GND and ISOLATED NEUTRAL side GND or EARTH side GND at the same time If above note will not be kept afuse or any parts wil be broken If any repair has been made to the chassis it is recommended that the B1 setting should be checked or adjusted See ADJUSTMENT OF B1POWER SUPPLY The high voltage applied to the picture tube must conform with that specified in Service manual Excessive high voltage 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 altematives approved by the manufacturer of the complete product Do not check high voltage by drawing an arc Use a high volt
31. rt 09 Number CH ky 00 2 14 MENU key MENU key 9 VOLUME 4 key Except for difference in body colour the Remote Control Unit n RM C364G Y and RM C364 have exactly the same Functions 6 No 52026 0900 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG LC10831 022A H QMPR340 165 K2 LC10831 032A H LC10831 024A H LC10831 026A H LC10831 023A H LC10831 031A H LC10831 025A H LC10831 029A H LC10831 025A H MAIN DIFFERENCE LIST E SCG 1401A H2 SCG 1420A H2 SCG 1418A H2 SCG 1419A H2 SCG 1404A H2 SCG 1440A H2 SCG 1421A H2 Part N CEU Inst Book Model Name LCT1188 001A H LCT1195 001A H LCT1174 001A H LCT1188 001A H Remote Control Unit RM C364GY 1H RM C90 1H RM C364GY 1H RM C364 1H RM C364GY 1H QMPR380 165 K2 Warranty Card Rating Label LC20377 010B H LC20377 001B H BT 54012 2 LC20377 009B H LC20377 001B H GG20024 001A H LC20377 001B H LC20413 002B H Digest Manual LCT1189 001A H LCT 1190 001A H LCT 1175 001A H AV 14FMG3 LCT 1196 001A H AV 14FMG3B Av 14FMG3 A 4 LCT 1197 001A H E TV RF System ee anaes OSD Language Model Name RF Mode SIF Carrier 32 5MHz 5 5MHz AV 14F3 B G D K PAL SECAM 31 5MHz 6 5MHz E R 32 0 2 6 0M Hz 1 Fo AV 1435TEE 32
32. ssed twice you will returnto the SERVICE MENU 2 V C 3 DEF and4 VSM PRESET 2 4 e n Select one from 2 V C 3 DEF and 4 VSM PRESET Q MENU V A Key n Select setting items MENU Key n Adjust the values ofthe items When this is pressed return to the SERVICE MENU 6 SETUP TOUR CD Bypressing the 6 key you can change the ON or OFF should be OFF Should be OFF If it is ON then you tum the TV power off when you are turn the TV power on again The JVC s logo will be shown about 15 seconds automatically MENU Key 555555522 Select Language MENU V t Auto Search No 52026 17 1 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B SERVICE MENU FLOW CHART SERVICE MENU SERVICE MENU 1 IF 2 3 DEF 4 VSM PRESET 5 PRESET 6 5 TOUR OFF 1 6 58 DISP EXIT kkk SUB MENU 1 IF IF 1 2 DELAY POINT 1 2 SELECT DISP EXT VCO CW MHz TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW AFT ADJUST VCO ADJUST DISP EXT SUB MENU 2 V C DELAYPOINT UHF AGCTAKE OVER By pressing 6 key OPERATE DISP EXIT 50Hz VA SELECT OPERATE SUB MENU 3 DEF DEF PAL 1 VER POSITION 50Hz V A SELECT 1 OPERATE DISP EXIT SUB MENU 4 VSM PRESET BRIGHT CONT SHARP
33. use a chip part after removing it SOLDERING IRON 1 Use ahighinsulation soldering iron with athin pointed end of it 2 AS30wsoldering iron is recommended for easily removing parts B REPLACEMENT STEPS 1 How to remove Chip parts Resistors capacitors etc 1 As shown in the figure push the part with tweezers and altemately melt the solder at each end 2 Shift with tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to eachlead SOLDER SOLDER 2 As shown in the figure push the part with tweezers and altemately melt the solder at each lead Shift and remove the chip part Note Afterremoving the part remove remaining solder from the pattern No 52026 AV 14F 3 AV 1435 AV 1435EE AV 1435TEE AV 14F MT 3 AV 1438 AV 14F MG3 AV 14FMG 3B 2 How to install Chip parts capacitors etc Apply solder to the pattern as indicated in the figure af 2 Grasp the chip part with tweezers and place it on the solder Then heat and the solder at both ends of the chip part P 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 solderlead as indicated in the figure 4 Then solder leads B and 31 1 1435 AV 1435EE AV 1435TEE AV 14F MT3 AV 14
Download Pdf Manuals
Related Search