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SERVICE MANUAL
FLAT COLOUR TELEVISION
1 2005 YA146
AV-21W314/B
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1 2 3 4 5
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30
TABLE OF CONTENTS
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA146 2005/1
SPECIFICATION
Items Dimensions (W I H I D) Mass TV RF System Colour System Stereo System Receiving Frequency VHF Low VHF High UHF CATV 64.9cm I 46.55cm I 47.15cm 24kg B, G TV Mode PAL / SECAM Video Mode PAL / SECAM / NTSC3.58 / NTSC4.43 A2 (B/G) (Billingual), Playback 46.25MHz ~ 168.25MHz (AU0 ~ S10) 175.25MHz ~ 463.25MHz (E5 ~ S41) 471.25MHz ~ 863.25MHz (E21 ~ CHINA 57) Mid : X ~ Z, S1 ~ S10 Super: S11 ~ S20 Hyper: S21 ~ S41 Contents
Intermediate Frequency
VIF 38.0MHz SIF B/G: 32.5MHz (5.5MHz) A2: 32.26MHz (5.74MHz)
Colour Sub Carrier Frequency Aerial Input Terminal Power Input Power Consumption Picture Tube Screen Size High Voltage Speaker Audio Output Video / Audio Input [1/2/3]
4.43MHz (PAL), 4.40MHz/4.25MHz (SECAM), 3.58MHz/4.43MHz (NTSC) 75 unbalanced, coaxial AC110V-AC240V, 50Hz / 60Hz (Operating Voltage 90V ~ 260V) 121W (Max.) / 81W (Avg.) A51LYJ10X 21-inch, aspect ratio 4:3, flat square face type, tinted Visible size : 51.0cm (Diagonal) / 41.6cm I 31.5cm (H I V) 29kV±1.5kV (at zero beam current) 6.5cm I 13cm, Oval type I 2 7W +7W
S-Video[1] Mini-DIN 4 pin I 1 Y: 1V(p-p), positive (negative sync provided), 75 C: 0.286V(p-p) (Burst signal), 75 Video [1/2/3] 1V(p-p), negative sync, 75 , RCA pin jack I 3 Audio [1/2/3] 500mV(rms) (-4dBs ), high impedance, RCA pin jack I 6 Component RCA pin jack I 3 Video [2] Y:1V(p-p), positive (negative sync), 75 Cb/Cr:0.7V(p-p), 75
Video / Audio Output Headphone Remote Control Unit
Video 1V(p-p), 75 , RCA pin jack I 1 Audio 500mV(rms)(-4dBs), Low impedance (400Hz when modulated 100%), RCA pin jack I 2 3.5mm stereo mini jack I 1 RM-C1281-2H (AA/R06/UM-3 battery I 2)
Design & specifications are subject to change without notice.
1-2 (No.YA146)
SECTION 1 PRECAUTION
1.1 SAFETY PRECAUTIONS (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 terminals, 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 1000 per volt or more sensitivity in the following manner. Connect a 1500 10W resistor paralleled by a 0.15kF 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 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 1000 /V, OR MORE SENSITIVITY)
(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 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 on the schematics and by ( ) 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 : ( ) 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 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 10k 2W resistor to the anode button.
0.15 F AC-TYPE PLACE THIS PROBE ON EACH EXPOSED METAL PART
1500 GOOD EARTH GROUND
10W
(No.YA146)1-3
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES New chassis design enables use of an interactive on-screen control. Pure flat CRT produces fine textured picture in every detail. Wide range voltage (110V ~ 240V) for AC power input. With AUDIO/VIDEO/COMPONENT input terminals. I2C bus control utilizes single chip ICs. By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically. Built-in OFF TIMER & RETURN +. 2.2 FUNCTIONS
REMOTE CONTROL UNIT RM-C1281-2H ï ÍÑËÒÜ ÍÇÍÌÛÓ µ»§ ïç î ÝÑÔÑËÎ ÍÇÍÌÛÓ µ»§ í ÚßÊÑÎ×ÌÛ ÝØßÒÒÛÔ µ»§îð îï îî îí îì îë îê îé îè îç íð íï ì Ü×ÍÐÔßÇ ÞßÝÕ µ»§ ë ÓÛÒË øÑÕ÷ µ»§ ê Ò±¬ «-»¼ é ÍÑËÒÜ ÌËÎÞÑ µ»§ è Ð×ÝÌËÎÛ ÓÑÜÛ µ»§ ç ÍÑËÒÜ -»¬¬·²¹ µ»§ øͬ»®»±ñÞ·´·²¹«¿´ ñÞ·´·²¹«¿´ ïð ÑÚÚ Ì×ÓÛÎ µ»§ ïï ÎÛÌËÎÒ õ µ»§ ïî ÝØßÒÒÛÔ øóñõ÷ µ»§ïí Ò±¬ «-»¼ ïì Ò±¬ «-»¼ ïë Ò±¬ «-»¼ ïê Ò±¬ «-»¼ ñÓ±²¿«®¿´÷ ïé Ò±¬ «-»¼ ïè ÛÝÑ µ»§ ïç ÐÑÉÛÎ µ»§ îð ÌÊ ñ Ê×ÜÛÑ µ»§ îï ÓÛÒË ø ñ ô îî ÓËÌ×ÒÙ µ»§ îí Ò«³¾»® µ»§îì óñóó µ»§ îë ÊÑÔËÓÛ øóñõ÷ µ»§îê Ò±¬ «-»¼ îé Ò±¬ «-»¼ îè Ò±¬ «-»¼ îç Ò±¬ «-»¼ íð Ò±¬ «-»¼ íï Ý×ÒÛÓß ÍËÎÎÑËÒÜ µ»§ ñ ÷ µ»§-
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1-4 (No.YA146)
FRONT PANEL CONTROLS
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(No.YA146)1-5
2.3 Pin No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
MAIN CPU [MAIN PWB : IC701] PIN FUNCTION Pin name
VssP2 VssC4 V1.8C4 V3.3A3 VrefP_Sdac VrefN_Sdac VrefP_Sdac VrefN_Sdac VrefP_Sdac XtalIn XtalOut VssA1 NECK CONT V5P1 Ph2 Ph1 Gnd1 SecPll Dec8G EW VDRBVDRA+ Vif1 Vif2 Vsc Iref GndIF Sif1 Sif2 AGC EHT Ssif/RefIn/Avl/RefOut L3 R3 L-OUT R-OUT DecsDem QssO/AmO/AudeEm Gnd2 PllIf SifAgc IfVo/FmRo/DvbO NC V8AudioSwitches AgcSsif V5P2 V-OUT L1 R1 V3 C4 Audio2InL Audio2InR V2/Y L2 R2 Y3/Cvbs C1 AudioLsL AudioLsR HP-L
I/O
I I I I I I O I I I O O O I I I I I O I O I I O O O O O I I O I I I I I I I I I I I O O O
Function
GND GND 1.8V (Digital) 3.3V 3.3V (Positive) GND 3.3V (Negative) GND 3.3V (Positive) 24.576MHz for system clock 24.576MHz for system clock GND V-guard input/ I/O switch 1.8V regulator control +5V Phase-2 filter Phase-1 filter GND SECAM PLL decoupling Bandgap decoupling East-West drive output Vertical drive B output Vertical drive A output Video IF input 1 Video IF input 2 Vertical sawtooth capacitor Reference current input GND Sound IF input 1 Sound IF input 2 Tuner AGC output EHT/overvoltage protection input Automatic Volume Levelling/ sound IF input / subcarrier reference output / external reference signal input for I signalmixer for DVB operation Audio-L3 input (left signal) Audio-R3 input (right signal) Audio L output Audio R output Decoupling sound demodulator QSS intercarrier output / AM output / deemphasis / (front-end audio out) GND IF-PLL loop filter AGC sound IF Not used Not used 8V AGC capacitor second sound IF 5V Video output Audio-L1 input Audio-R1 input Video V3 input Not used Not used Not used Video V2 input Audio L2 input (Left signal) Audio R2 input (right signal) S-Video Y1 input S-Video C1 input Audio L output for audio power amplifier Audio R output for audio power amplifier Not used
Pin No.
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128
Pin name
HP-R CVBSO/PIP SVM FbiSo Hout VssComb V5Comb Vin/R2/Pr Uin/B2/Pb Yin/G2/Y Ysync Yout Uout/INSSW2 NC INSSW3 R3/Pr G3/Y B3/Pb Gnd3 V5P3 BCL BLKIN Rout Gout Bout V3.3A1 RefAdN V3.3RefAdP RefAd GndA V1.8A V3.3A2 VssADC V1.8ADC REMOTE PW_LED PW_LED V1.8C2 VssC2 TIMER TIMER VER_PROTECT S_REDUCE P00/I2SDI1 POWER SCL1 SDA1 V3.3P ROTATION 3.58/OTHER A_MUTE 4.5/OTHER PROT ECO_IN V1.8C1 DecV1V8 KEY_IN VDO-DET VSSC1+P1 S_V_DET P25/PWM4 V1.8C3 VssC3 P12/Int2 SDA0 SCL0
I/O
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Function
Not used CVBS / PIP output Not used Flyback input/sandcastle output Horizontal output GND 5V PIP R input PIP B input PIP G input Not used Not used YUV insertion input Not used YUV insertion input Component PR input (Video-2) Component Y input (Video-2) Component PB input (Video-2) GND 5V Beam current limiter input Black current input R output G output B output 3.3V GND 3.3V (Positive) 3.3/2V GND 1.8V 3.3V GND 1.8V Remote control POWER LED control POWER LED control 1.8V GND Not used Not used X-ray protect Sound control Not used SUB POWER control I2C bus clock I2C bus data 3.3V Rotation NTSC 3.58 detection Audio muting NTSC 4.43 detection Protect ECO sensor level detection 1.8V (Digital) 1.8V Key scan data Video DET input Digital GND S-Video DET input GTVA_reset 1.8V (Digital) GND External interrupt I2C bus data (for memory) I2C bus clock (for memory)
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
1-6 (No.YA146)
SECTION 3 DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER Unplug the power cord. (1) Remove the 9 screws [A] and 4 screws [B] as shown in Fig.1. (2) Withdraw the REAR COVER toward you. CAUTION: When reinstalling the rear cover, carefully push it inward after inserting the MAIN PWB into the REAR COVER groove. 3.1.2 REMOVING THE MAIN PW BOARD Remove the REAR COVER. (1) Slightly raise the both sides of the MAIN PWB by hand. (2) Withdraw the MAIN PWB backward. (If necessary, take off the wire clamp and connectors, etc.) 3.1.3 REMOVING THE SPEAKER Remove the REAR COVER. (1) Remove the 2 screws [C] as shown in Fig.1. (2) Follow the same steps when removing the other hand SPEAKER. 3.1.4 CHECKING THE MAIN PW BOARD To check the back side of the MAIN PWB. (1) Pull out the MAIN PWB. (Refer to REMOVING THE MAIN PW BOARD). (2) Erect the MAIN PWB vertically so that you can easily check its back side. CAUTIONS: Before turning on power, make sure that the CRT earth wire and other connectors are properly connected. When repairing, connect the DEG. COIL to the DEG. connector on the MAIN PWB. When repairing, connect the DEG. COIL to the DEG. connector on the MAIN PWB. 3.1.5 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.
(No.YA146)1-7
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3.2
REPLACEMENT OF MEMORY IC
3.2.1 MEMORY IC This TV uses the following memory IC. Memory IC: IC702 on MAIN PWB The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in "PRINTED WIRING BOARD PARTS LIST". For its mounting location, refer to "ADJUSTMENT LOCATIONS". 3.2.2 PROCEDURE FOR REPLACING MEMORY IC 1. Power off Switch the power off and unplug the power cord from the wall outlet. 2. Replacing the memory IC Replace the memory IC with new one. Be sure to use the memory IC written with the initial data values. 3. Power on Plug the power cord into the wall outlet and switch the power on. 4. Check and setting of SYSTEM CONSTANT SET: (1) Press the [DISPLAY] key and the [PICTURE MODE] key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed.(See Fig.1.) (2) In the SERVICE MENU, press the [DISPLAY] key and [PICTURE MODE] key simultaneously. Then, the SYSTEM CONSTANT SET screen will be displayed.(See Fig.2.) (3) Check whether the setting values of the SYSTEM CONSTANT SET are the same as those indicated in Table 1. If the value is different, select the setting item with the MENU [ ] / [ ] key, and set the correct value with the MENU [ ] / [ ] key. (4) Press the [DISPLAY] key twice to return to the normal screen. 5. Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the receive channels (channels preset). 6. User setting Check the user setting values in Table 2 and Table 3. If setting value is different, set the correct value. For setting, refer to the OPERATING INSTRUCTIONS. 7. Setting of SERVICE MENU Verify the setting for each setting item in the SERVICE MENU.(See Table 4.) If readjustment is necessary, perform adjustment referring to "ADJUSTMENTS PROCEDURE".
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(No.YA146)1-9
3.2.3 FACTORY SETTING VALUE SETTING OF SYSTEM CONSTANT SET
Setting item SYSTEM COMB TILT SUPER BASS TEXT LANGUAGE SOUND BILINGUAL BLUE BACK MUTE COLOUR AUTO ECO SENSOR SURROUND PICTURE BOOSTER COMPONENT PIP S INPUT
STEREO YES YES YES YES YES YES YES YES YES
Setting content
MULTI TRIPLE YES YES YES SINGLE PAL NO NO NO NO E/T PB NO NO NO NO NO NO NO NO NO MONO PAT THAI
Setting value THAI NO NO NO NO E/T PB YES NO NO YES YES NO YES NO YES
Table 1
1-10 (No.YA146)
SETTING OF BASIC FUNCTIONS Setting item POWER SUB POWER VOLUME COLOR SYSTEM SOUND SYSTEM PICTURE MODE (VSM) CINEMA SURROUND OFF TIMER CHANNEL POSITION Off On 15 PAL B/G BRIGHT OFF OFF PR1 Table 2 SETTING OF MENU SCREEN Setting item INPUT VNR COMPRESS (16:9) AUTO SHUTOFF CHILD LOCK BLUE BACK VIDEO-2 SET AUTO PROGRAM EDIT / MANUAL LANGUAGE WHITE BALANCE TINT COLOUR BRIGHT CONT SHARP BALANCE SOUND MODE SOUND TURBO AI VOLUME FAVORITE CH RED FAVORITE CH GREEN FAVORITE CH BLUE AI ECO SENSOR AI ECO DISPLAY TV AUTO OFF OFF OFF ON VIDEO Refer to OPERATING INSTRUCTIONS Refer to OPERATING INSTRUCTIONS THAI COOL Centre Centre Centre Maximum Centre Centre DYNAMIC OFF ON PR01 PR02 PR04 OFF ON Table 3 Setting value Setting value
SERVICE MENU SETTING ITEMS Setting item 1. IF 2. V/C Setting value 1. VCO 2. DELAY POINT 1. SCREEN 2. CUTOFF(B/G) 3. WDR(R/G/B) 4. BRIGHT(TV/VDO 1/2/3) 5. CONT(TV/VDO 1/2/3/TV 16:9/VDO 16:9) 6. COLOUR(TV/VDO1/2/3/DVD) 7. TINT(TV/VDO 1/2/3) 8. SHARP [Do not adjust] 9. Y DELAY [Do not adjust] 10. TINT DVD [Do not adjust] 11. AMP T. SHARP 1. DCXO ADJ 2. NICAM lower ERRLIM 3. NICAM upper ERRLIM 4. A2 ID THR 5. MENU EQUALIZER 1. V-SHIFT 2. V-SLOPE 3. V-SIZE 4. H-CENT 5. H-SIZE 6. TRAPEZ 7. EW-PIN 8. COR-UP 9. COR-LO 10. ANGLE 11. BOW 12. V-S.CR 13. V-LIN 14. V-ZOOM 15. V-SCROLL
3. AUDIO [Do not adjust]
4. DEF
1. BRIGHT 5. VSM W/B (BRIGHT/STANDARD/SOFT) 2. CONT 3. COLOUR 4. SHARP 5. HUE (COOL/WARM/NORMAL) 1. R DRIVE 2. G DRIVE 3. B DRIVE 6. STATUS [Display only] 7. PLUG & PLAY(ON) [Display only] Table 4
FAVORITE CH YELLOW PR03
(No.YA146)1-11
3.3
REPLACEMENT OF CHIP COMPONENT
3.3.1 CAUTIONS (1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it. 3.3.2 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. 3.3.3 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. How to install Chip parts [Resistors, capacitors, 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. Then heat and melt the solder at both ends of the chip part. (2) Shift with the tweezers and remove the chip part.
[Transistors, diodes, variable resistors, etc.] [Transistors, diodes, variable resistors, etc.] (1) Apply extra solder to each lead.
ÍÑÔÜÛÎ ÍÑÔÜÛÎ
(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.
(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.
ß Þ Ý
(4) Then solder leads B and C.
ß Þ
NOTE : After removing the part, remove remaining solder from the pattern.
Ý
1-12 (No.YA146)
SECTION 4 ADJUSTMENT
4.1 ADJUSTMENT PREPARATION (1) You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment and parts as given below. (2) Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting values used for setting the screen to its optimum condition may differ from the initial settings. (3) Make sure that AC power is turned on correctly. (4) Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes. (5) 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 variable resistors, transformers, trimmer capacitors, etc. 4.2 PRESETTING BEFORE ADJUSTMENT Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit. User mode setting position Setting item PICTURE MODE (VSM) CONT VNR BALANCE SOUND TURBO CINEMA SURROUND COMPRESS (16:9) 4.3 (1) (2) (3) (4) 4.4 BRIGHT Maximum OFF Centre OFF OFF OFF TINT, COLOUR, BRIGHT,SHARP Centre Setting value
MEASURING INSTRUMENT AND FIXTURES DC voltmeter (or Digital voltmeter) Oscilloscope Signal generator (Pattern generator) [PAL/SECAM/NTSC] Remote control unit ADJUSTMENT ITEMS DEFLECTION CIRCUIT ADJUSTMENTS V.SLOPE adjustment V.POSITION adjustment V.HEIGHT adjustment H.POSITION adjustment V. LINEARITY adjustment H. PARALLEL adjustment H.BOW adjustment VSM PRESET SETTING PURITY AND CONVERGENCE ADJUSTMENTS PURITY adjustment STATIC CONVERGENCE adjustment DYNAMIC CONVERGENCE adjustment
B1 VOLTAGE FOCUS ADJUSTMENT IF CIRCUIT ADJUSTMENTS IF VCO adjustment DELAY POINT (AGC TAKE-OVER) adjustment VIDEO CIRCUIT ADJUSTMENTS WHITE BALANCE (Low light) adjustment WHITE BALANCE (High light) adjustment SUB BRIGHT adjustment SUB CONTRAST adjustment SUB COLOUR 1 adjustment SUB COLOUR 2 adjustment SUB TINT 1 adjustment SUB TINT 2 adjustment AUDIO SETTING
(No.YA146)1-13
4.5
ADJUSTMENT LOCATIONS
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1-14 (No.YA146)
4.6
BASIC OPERATION IN SERVICE MENU
Operate the SERVICE MENU with the remote control unit. 4.6.1 SERVICE MENU ITEMS With the SERVICE MENU, various settings (adjustments) can be made, and they are broadly classified in the following items of settings: 1. IF 2. V/C 3. AUDIO 4. DEF 5. VSM W/B 6. STATUS 7. PLUG & PLAY (ON) For entering/adjusting the setting values (adjustment values) of the IF circuit. For entering/adjusting the setting values (adjustment values) of the VIDEO circuit. For entering/adjusting the setting values (adjustment values) of the AUDIO circuit. For entering/adjusting the setting values (adjustment values) of the DEFLECTION circuit. For setting the values of STANDARD, SOFT, BRIGHT and COOL, NORMAL, WARM. This is not used for service. This is not used for service.
4.6.2 BASIC OPERATION IN SERVICE MENU 1. HOW TO ENTER SERVICE MENU Press the [DISPLAY] key and the [PICTURE MODE] key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1 on the next page.) 2. SELECTION OF SUB MENU SCREEN Press one of the keys 1 to 6 on the remote control unit, and select the SUB MENU SCREEN from the SERVICE MENU. (See Fig.1 on the next page.) SERVICE MENU SUB MENU 1. IF 2. V/C 3. AUDIO 4. DEF 3. METHOD OF SETTING NOTES: Once the setting values are set, they are memorized automatically. It must not be adjusted without inputting a signal. (1) 1. IF [1.VCO ] : Under normal conditions, no adjustment is required. (a) [1] key (b) [1] key (c) [DISPLAY] key [2.DELAY POINT ] (a) [1] key (b) [2] key (c) MENU [ ] / [ ] key (d) [DISPLAY] key (2) 2. V/C, 3. AUDIO and 4. DEF (a) [2] ~[4] keys (b) MENU [ ] / [ ] key (c) MENU [ ] / [ ] key (d) [DISPLAY] key (3) 5. VSM W/B (a) [5] keys (b) MENU [OK] key (c) MENU [ ] / [ ] key (d) MENU [ ] / [ ] key (e) [DISPLAY] key (4) 6. STATUS This is for display only. (5) 7. PLUG & PLAY (ON) This is not used for service. 4. Release of SERVICE MENU After completing the setting, return to the SERVICE MENU by pressing the [DISPLAY] key, then again press the [DISPLAY] key to return to the normal screen. (No.YA146)1-15 Select 5. VSM W/B. Select preset items. Adjust setting items. Adjust the setting values of the setting items. When this is pressed, you will return to the SERVICE MENU. Select one from 2. V/C, 3. AUDIO and 4. DEF Select setting items. Adjust the setting values of the setting items. Use the number keys on the remote control unit for setting the WHITE BALANCE. For the setting, refer to each item concerned. When this is pressed, you will return to the SERVICE MENU. Select 1. IF. Select 2. DELAY POINT. Adjust the setting value. When this is pressed twice, you will return to the SERVICE MENU. Select 1. IF. Select 1. VCO. When this is pressed twice, you will return to the SERVICE MENU. 5. VSM W/B 6. STATUS 7. PLUG & PLAY (ON)
4.6.3 SERVICE MENU FLOW CHART
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Fig.1 1-16 (No.YA146)
4.7
ADJUSTMENT PROCEDURE Measuring instrument Signal generator
4.7.1 B1 VOLTAGE Item B1 VOLTAGE check Test point Adjustment part Description (1) Receive a PAL black and white signal. (2) Connect a DC voltmeter between B1 and GND (between pins 1 and 5 of the connector CN00X). (3) Make sure that the voltage is DC134.5V ± 2V.
B1 (pin 1) GND (pin 5) [CN00X DC voltmeter connector in MAIN PWB]
4.7.2 FOCUS ADJUSTMENT Item FOCUS adjustment Measuring instrument Signal generator Test point Adjustment part FOCUS VR [In HVT] Description Notes: Set PICTURE MODE (VSM) to "BRIGHT". The final adjustment of CONVERGENCE must be done after the FOCUS adjustment. (CONVERGENCE is affected by the FOCUS adjustment.) If any deviation in CONVERGENCE is found, PURITY must be adjusted to restore the convergence. (1) Receive a PAL crosshatch signal. (2) Adjust the FOCUS VR so that the vertical and horizontal lines will be clear and in fine detail on the screen. (3) Make sure that the picture is in focus even when the screen gets darkened.
4.7.3 IF CIRCUIT ADJUSTMENTS Item IF VCO check Measuring instrument Remote control unit
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Test point
Adjustment part [1. IF] 1. VCO (CW)
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Description Note: Under normal conditions, no adjustment is required. (1) Receive a PAL broadcast signal. (2) Select 1. IF from the SERVICE MENU. (3) Select 1. VCO. (4) Check the characters colour of the JUST REFERENCE displayed to yellow. (5) Press the [DISPLAY] key three times to return to normal screen.
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DELAY POINT (AGC TAKE-OVER) adjustment
Remote control unit
[1. IF] 2. DELAY POINT
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(1) Receive a PAL black and white broadcast signal (colour off). (2) Select 1. IF from the SERVICE MENU. (3) Select 2. DELAY POINT. (4) Adjust in order to eliminate any noise or beat from the image. Any increase above the initial value produces the noise and any decrease below it produces the beat. (5) Press the [DISPLAY] key three times to return to the normal screen. (6) Turn to other channels and make sure that there are no irregularities.
(No.YA146)1-17
4.7.4 VIDEO CIRCUIT ADJUSTMENTS The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. Do not change the initial setting values of the setting (adjustment) items not listed in "ADJUSTMENT PROCEDURE". The initial setting values in parenthesis ( ) are fixed offset values, needing no further adjustment.
Adjustment item BRI B G 3. WDR R G B 4. BRIGHT RF VIDEO 1(COMPOSITE/S) VIDEO 2(COMPONENT) VIDEO 3(COMPOSITE) 5. CONT. RF VIDEO RF 16:9 VIDEO 16:9 6. COLOUR RF VIDEO 7. TINT RF VIDEO 8. SHARP RF VIDEO 9. Y DELAY RF VIDEO S-VIDEO 10. TINT DVD RF, VIDEO, S-VIDEO COMPONENT 11. AMP T.SHARP RF, VIDEO 1. SCREEN 2. CUTOFF Variable range 0 ~ 63 0 ~ 63(-32 ~ +31) 0 ~ 63(-32 ~ +31) 0 ~ 63(-32 ~ +31) 0 ~ 63(-32 ~ +31) 0 ~ 63(-32 ~ +31) 0 ~ 63 (-32 ~ +31) (-32 ~ +31) (-32 ~ +31) 0 ~ 63 (-32 ~ +31) (-32 ~ +31) (-32 ~ +31) 0 ~ 63(-32 ~ +31) (-32 ~ +31) 0 ~ 63(-32 ~ +31) (-32 ~ +31) 0 ~ 63 0 ~ 63 0 ~ 15 0 ~ 15 0 ~ 15 0 ~ 63 (-32 ~ +31) 0 ~ 63 Initial setting value PAL 31 43 28 35 32 40 34 +2 +2 +2 18 -1 (-2) --42 (+4) ----40 54 2 2 7 32 --0 SECAM 31 43 28 35 32 40 34 +2 +2 +2 18 -1 (-2) --29 (+0) ----40 54 4 4 10 29 --0 NTSC3.58 NTSC4.43 31 43 28 35 32 40 34 +2 +2 +2 18 -1 (-2) ----(34) --(32) 40 54 --3 7 32 --0 31 43 28 35 32 40 34 +2 +2 +2 18 -1 (-2) ----(-1) --(+4) 40 54 --3 7 32 --0 COMPONENT (V-2) 525i 625i 31 31 (+0) (+0) (-3) (-3) (0) (0) (0) (0) (0) (0) --------(+1) (+1) ---------2 -2 ------------(+6) (+1) ------------40 40 ----------------(0) (+1) 0 0
1-18 (No.YA146)
Item WHITE BALANCE (Low light) adjustment
Measuring instrument Signal generator Remote control unit
Test point
Adjustment part [2. V/C] 2. CUTOFF (B) 2. CUTOFF (G) SCREEN VR [In HVT]
Description Note: Set PICTURE MODE (VSM) to "BRIGHT". - COMPOSITE WHITE BALANCE (1) Receive a PAL black and white signal (colour off). (2) Select 2. V/C from the SERVICE MENU. (3) Select 2. CUTOFF (B) and (G). (4) Set each value to initial setting value with the [4] / [7] keys and [5] / [8] keys. (5) Turn the SCREEN VR fully counterclockwise, then slowly turn it clockwise to where a red, blue or green colour is faintly visible. (6) Use the [4] / [7] and [5] / [8] keys to adjust so that the other 2 colours appear white. (7) Turn the SCREEN VR to where the single horizontal line glows faintly. (8) Press the [DISPLAY] key twice to return to the normal screen. - COMPONENT WHITE BALANCE (1) Receive a PAL component black and white signal (colour off). (2) Select VIDEO-2 SET from the MENU and set VIDEO-2 SET to COMPONENT. (3) Adjust COMPONENT WHITE BALANCE in the same way as "COMPOSITE WHITE BALANCE". ß¼¶«-¬³»²¬ ׬»³ îò ÝËÌ ÑÚÚ Ê¿®·¿¾´» ®¿²¹» Þ ð ¢ êí øóíî¢õíï÷ Ù ð ¢ êí øóíî¢õíï÷ ײ·¬·¿´ -»¬¬·²¹ ª¿´«»
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WHITE BALANCE (High light) adjustment
Signal generator Remote control unit
[2. V/C] 3. WDR (R) 3. WDR (G) 3. WDR (B)
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Notes: Proceed to the following adjustment after having completed the WHITE BALANCE (Low light) adjustment. Set PICTURE MODE (VSM) to "BRIGHT". (1) Receive a PAL black and white signal (colour off). (2) Select 2. V/C from the SERVICE MENU. (3) Select 3. WDR (R), (G) and (B). (4) Set each value to initial setting value with the [4] to [9] keys. (5) Use the [4] to [9] keys to produce a white screen. (6) Press the [DISPLAY] key twice to return to the normal screen. ß¼¶«-¬³»²¬ ׬»³ Î Ê¿®·¿¾´» ®¿²¹» ð ¢ êí ð ¢ êí ð ¢ êí ײ·¬·¿´ -»¬¬·²¹ ª¿´«» íëö íî ìðö
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(No.YA146)1-19
Item SUB BRIGHT adjustment
Measuring instrument Remote control unit
Test point
Adjustment part [2. V/C] 4. BRIGHT
Description Notes: Proceed to the following adjustment after having completed the WHITE BALANCE (Low light) and WHITE BALANCE (High light) adjustment. Set PICTURE MODE (VSM) to "BRIGHT". (1) Receive a PAL broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select 4. BRIGHT. (4) Set the initial setting value. (5) If the brightness is not best with the initial setting value, make fine adjustment until you get the best brightness. (6) Press the [DISPLAY] key twice to return to the normal screen. Notes: Proceed to the following adjustment after having completed the SUB BRIGHT adjustment. Set PICTURE MODE (VSM) to "BRIGHT". (1) Receive a PAL broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select 5. CONT. (4) Set the initial setting value. (5) If the contrast is not best with the initial setting value, make fine adjustment until you get the best contrast. (6) Press the [DISPLAY] key twice to return to the normal screen. [Method of adjustment without measuring instrument] Notes: Proceed to the following adjustment after having completed the SUB CONTRAST adjustment. Set PICTURE MODE (VSM) to "BRIGHT". - PAL COLOUR (1) Receive a PAL broadcast. (2) Select 2. V/C from the SERVICE MENU. (3) Select 6. COLOUR. (4) Set the initial setting value for PAL COLOUR. (5) If the colour is not best with the initial setting value, adjust until you get the best colour. (6) Press the [DISPLAY] key twice to return to the normal screen. - SECAM COLOUR (1) Receive a SECAM broadcast. (2) Press the [COLOUR SYSTEM] key to select the SECAM colour system. (3) Adjust SECAM COLOUR in the same way as for "PAL COLOUR". - NTSC 3.58 COLOUR (1) Receive a NTSC 3.58MHz broadcast. (2) Press the [COLOUR SYSTEM] key to select the NTSC 3.58 colour system. (3) Adjust NTSC 3.58 COLOUR in the same way as for "PAL COLOUR". - NTSC 4.43 COLOUR When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR.
SUB CONTRAST adjustment
Remote control unit
[2. V/C] 5. CONT
SUB COLOUR 1 Remote adjustment control unit
[2. V/C] 6. COLOUR
1-20 (No.YA146)
Item
Measuring instrument
Test point
Adjustment part
Description [Method of adjustment using measuring instrument] Notes: Proceed to the following adjustment after having completed the SUB CONTRAST adjustment. Set PICTURE MODE (VSM) to "BRIGHT". - PAL COLOUR (1) Receive a PAL colour bar signal (full field colour bar 75% white). (2) Select 2. V/C from the SERVICE MENU. (3) Select 6. COLOUR. (4) Set the initial setting value of PAL COLOUR. (5) Connect the oscilloscope between TP-47G and TP-E. (6) Adjust PAL COLOUR to set the value (A) in the figure to +12V. - SECAM COLOUR (1) Receive a SECAM colour bar signal (colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the SECAM colour system. (3) Set the initial setting value of SECAM COLOUR. (4) Adjust SECAM COLOUR to set the value (A) in the figure to +1V. - NTSC 3.58 COLOUR (1) Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the NTSC 3.58 colour system. (3) Set the initial setting value of NTSC 3.58 COLOUR. (4) Adjust NTSC 3.58 COLOUR to set the value (A) in the figure to +4V. - NTSC 4.43 COLOUR When adjustment is done for NTSC 3.58 COLOUR, appropriate values are automatically set for NTSC 4.43 COLOUR. [Method of adjustment without measuring instrument] Notes: Proceed to the following adjustment after having completed the SUB CONTRAST adjustment. Set PICTURE MODE (VSM) to "BRIGHT". - NTSC 3.58 TINT (1) Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the NTSC 3.58 colour system. (3) Select 2. V/C from the SERVICE MENU. (4) Select 7. TINT. (5) Set the initial setting value of NTSC 3.58. (6) If you cannot get the best tint with the initial setting value, make fine adjustment until you get the best tint. (7) Press the [DISPLAY] key twice to return to the normal screen. - NTSC 4.43 TINT When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT.
SUB COLOUR 2 Signal adjustment generator
[2. V/C] TP-47G 6. COLOUR TP-E [CRT SOCKET Oscilloscope PWB] Remote control unit
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SUB TINT 1 adjustment
Signal generator Remote control unit
[2. V/C] 7. TINT
(No.YA146)1-21
Item SUB TINT 2 adjustment
Measuring instrument Signal generator
Test point
Adjustment part
Description [Method of adjustment using measuring instrument] Notes: Proceed to the following adjustment after having completed the SUB CONTRAST adjustment. Set PICTURE MODE (VSM) to "BRIGHT". - NTSC 3.58 TINT (1) Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white). (2) Press the [COLOUR SYSTEM] key to select the NTSC 3.58 colour system. (3) Select 2. V/C from the SERVICE MENU. (4) Select 7. TINT. (5) Set the initial setting value of NTSC 3.58. (6) Connect the oscilloscope between TP-47G and TP-E. (7) Adjust NTSC 3.58 TINT to set the value (B) in the figure to +4V. (8) Press the [DISPLAY] key twice to return to the normal screen. - NTSC 4.43 TINT When adjustment is done for NTSC 3.58 TINT, appropriate values are automatically set for NTSC 4.43 TINT.
[2. V/C] TP-47G 7. TINT TP-E [CRT SOCKET Oscilloscope PWB] Remote control unit
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4.7.5 AUDIO SETTING This submenu is for display only, no adjustment is required. Function MENU EQUALIZER DYNAMIC MUSIC NEWS USER Item 100Hz +4 +7 -6 0 300Hz +3 +2 +1 0 1kHz -10 +5 +6 0 3kHz +3 +2 +1 0 8kHz +4 +7 -6 0
1-22 (No.YA146)
4.7.6 DEFLECTION CIRCUIT ADJUSTMENTS The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. When performing deflection circuit adjustment, adjusts PAL signal (fv: 50 Hz) in 4:3 mode and 16:9 mode respectively, and adjust the NTSC signal (fv: 60 Hz) similarly. Note: Proceed to the following adjustment after having completed the adjustments of SUB BRIGHT and SUB PICTURE. 4. DEF Adjustment item 1. V-SHIFT 2. V-SLOPE 3. V-SIZE 4. H-CENT 5. H-SIZE 6. TRAPEZ 7. EW-PIN 8. COR-UP 9. COR-LO 10. ANGLE 11. BOW 12. V-S.CR 13. V-LIN 14. V-ZOOM 15. V-SCROLL COMPRESS: OFF (4:3) Item V. SLOPE adjustment Measuring instrument Signal generator Remote control unit Test point Adjustment part [4. DEF] 2. V-SLOPE Description - PAL V. SLOPE (1) Receive a PAL circle pattern signal of vertical frequency 50Hz. (2) Select 4. DEF from the SERVICE MENU. (3) Select 2. V-SLOPE. (4) Set the initial setting value of 2. V-SLOPE. (5) Adjust 2. V-SLOPE to make "A = B". (6) Press the [DISPLAY] key to return to SERVICE MENU screen. - NTSC V. SLOPE (1) Receive a NTSC circle pattern signal of vertical frequency 60Hz. (2) Make similar adjustment of NTSC V-SLOPE in the same way as for "PAL V-SLOPE". - PAL V. POSITION (1) Receive a PAL circle pattern signal of vertical frequency 50Hz. (2) Select 1. V-SHIFT. (3) Set the initial setting value of 1. V-SHIFT. (4) Adjust 1. V-SHIFT to make "A = B". - NTSC V. POSITION (1) Receive a NTSC circle pattern signal of vertical frequency 60Hz. (2) Make similar adjustment of NTSC V. POSITION in the same way as for "PAL V. POSITION". Variable range 4:3 50Hz 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 0 ~ 63 Others -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 -32 ~ +31 50Hz +32* +32* +38* +32* 0 0 0 0 0 +32* +32* +32* +32* (+30) (+32) 4:3 Initial setting value COMPRESS (16:9) 60Hz 50Hz 60Hz 0* 0* 0* 0* 0* 0* 0* -14* 0* 0* 0* 0* 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0* 0* 0* 0* 0* 0* 0* 0* 0* 0* 0* 0* (0) -13* +3* (0) (0) (0) ) are fixed values.
NOTE: The value with an asterisk * is variable for adjustment. The values in parenthesis (
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V. POSITION adjustment
Signal generator Remote control unit
[4. DEF] 1. V-SHIFT
(No.YA146)1-23
Item V. HEIGHT adjustment
Measuring instrument Signal generator Remote control unit
Test point
Adjustment part [4. DEF] 3. V-SIZE 14. V-ZOOM
Description - PAL V. HEIGHT (1) Receive a PAL crosshatch signal. (2) Select 3. V-SIZE. (3) Set the initial setting value of 3. V-SIZE. (4) Select 14. V-ZOOM. (5) Set the initial setting value of 14. V-ZOOM. (6) Adjust 14. V-ZOOM to make the vertical screen size to 92% of the picture size. - NTSC V. HEIGHT (1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC V. HEIGHT in the same way as for "PAL V. HEIGHT".
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H. POSITION adjustment
Signal generator Remote control unit
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[4. DEF] 4. H-CENT
- PAL H. POSITION (1) Receive a PAL circle pattern signal. (2) Select 4. H-CENT. (3) Set the initial setting value of 4. H-CENT. (4) Adjust 4. H-CENT to make "C = D". - NTSC H. POSITION (1) Receive a NTSC circle pattern signal. (2) Make similar adjustment of NTSC H. POSITION in the same way as for "PAL H. POSITION".
V.LINEARITY adjustment
Signal generator Remote control unit
[4. DEF] 12. V-S. CR 13. V-LIN
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- PAL V. LINEARITY (1) Receive a PAL crosshatch signal. (2) Select 12. V-S.CR. (3) Set the initial setting value of 12. V-S. CR. (4) Select 13. V-LIN. (5) Set the initial setting value of 13. V-LIN. (6) Adjust 12. V-S. CR and 13. V-LIN so that the spaces of each line on TOP, CENTRE and BOTTOM become uniform. - NTSC V. LINEARITY (1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC V-S. CR in the same way as for "PAL V-S. CR".
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1-24 (No.YA146)
Item H. PARALLEL adjustment
Measuring instrument Signal generator Remote control unit
Test point
Adjustment part [4.DEF] 10. ANGLE
Description - PAL H. PARALLEL (1) Receive a PAL crosshatch signal. (2) Select 10. ANGLE. (3) Set the initial setting value of 10. ANGLE. (4) Adjust 10. ANGLE to optimize the trapezium distortion at the centre of the screen. - NTSC H. PARALLEL (1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC H. PARALLEL in the same way as for "PAL H. PARALLEL".
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H. BOW adjustment
Signal generator Remote control unit
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[4.DEF] 11. BOW
- PAL H. BOW (1) Receive a PAL crosshatch signal. (2) Select 11. BOW. (3) Set the initial setting value of 11. BOW. (4) Adjust 11. BOW to optimize the horizontal arc distortion. - NTSC H. BOW (1) Receive a NTSC crosshatch signal. (2) Make similar adjustment of NTSC H. BOW in the same way as for "PAL H. BOW". (3) Press the [DISPLAY] key twice to return to the normal screen.
(No.YA146)1-25
COMPRESS : ON (16:9) Item V. HEIGHT adjustment Measuring instrument Signal generator Remote control unit
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Test point
Adjustment part [4.DEF] 14. V. ZOOM 3. V-SIZE
Description - PAL V. HEIGHT (1) Receive a PAL crosshatch signal of vertical frequency 50Hz. (2) Press the [MENU] key and select PICTURE. (3) Select PICTURE FEATURES. (4) Select COMPRESS (16 : 9) and set COMPRESS to ON. (5) Select 4. DEF from the SERVICE MENU. (6) Set the initial setting value of 14. V. ZOOM. (7) Select 3. V-SIZE. (8) Set the initial setting value of 3. V-SIZE. (9) Adjust 3. V-SIZE to set the vertical amplitude of the image to 235mm. - NTSC V. HEIGHT (1) Receive a NTSC crosshatch signal of vertical frequency 60Hz. (2) Make similar adjustment of NTSC V. HEIGHT in the same way as for "PAL V. HEIGHT".
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V. SLOPE adjustment
Signal generator Remote control unit
[4.DEF] 2. V-SLOPE
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- PAL V. SLOPE (1) Receive a PAL circle pattern signal of vertical frequency 50Hz. (2) Select 4. DEF from the SERVICE MENU. (3) Select 2. V-SLOPE. (4) Set the initial setting value of 2. V-SLOPE. (5) Adjust 2. V-SLOPE to make "A = B". (6) Press the [DISPLAY] key to return to SERVICE MENU screen. - NTSC V. SLOPE (1) Receive a NTSC circle pattern signal of vertical frequency 60Hz. (2) Make similar adjustment of NTSC V-SLOPE in the same way as for "PAL V-SLOPE".
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1-26 (No.YA146)
VIDEO - 2 SET: COMPONENT Item H. POSITION adjustment Measuring instrument Signal generator Remote control unit
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Test point
Adjustment part [4. DEF] 4. H-CENT
Description (1) Receive a PAL circle pattern signal to VIDEO-2 component terminal. (2) Select VIDEO-2 SET from the MENU and set VIDEO-2 SET to COMPONENT. (3) Select 4. DEF from the SERVICE MENU. (4) Select 4. H-CENT. (5) Set the initial setting value of 4. H-CENT. (6) Adjust 4. H-CENT to make "C=D". (7) Press the [DISPLAY] key twice to return to the normal screen.
4.7.7 VSM PRESET SETTING Item VSM PRESET setting Measuring instrument Remote control unit Test point Adjustment part [5. VSM W/B] 1. BRIGHT 2. CONT 3.COLOUR 4. SHARP 5. HUE 1. R-DRIVE 2. G-DRIVE 3. B-DRIVE Description (1) Select 5. VSM W/B from the SERVICE MENU. (2) Select BRIGHT with the MENU [OK] key. (3) Set the value of 1. BRIGHT ~ 5. HUE to the values shown in the table. (4) Respectively select the VSM PRESET mode for SOFT and STANDARD. (5) Select COOL with the MENU [OK] key. (6) Set the values of 1. R-DRIVE ~ 3. B-DRIVE to the value shown in the table. (7) Select the W/B preset for WARM and NORMAL, respectively. (8) Press the [DISPLAY] key twice to return to the normal screen. ÅÍ»¬¬·²¹ Ê¿´«»- º±® ÍËÞ ëò ÊÍÓ ÉñÞà ÊÍÓ °®»-»¬ ÞÎ×ÙØÌ Í»¬¬·²¹ ·¬»³ ïò ÞÎ×ÙØÌ îò ÝÑÒÌ íò ÝÑÔÑËÎ ìò ÍØßÎÐ ëò ØËÛ ÉñÞ °®»-»¬ ÝÑÑÔ Í»¬¬·²¹ ·¬»³ ïò ÎóÜÎ×ÊÛ îò ÙóÜÎ×ÊÛ íò ÞóÜÎ×ÊÛ ð ð ð ð õî óïð õïð óì óïî ÒÑÎÓßÔ ÉßÎÓ ð õïë ð ð ð õì õì ð ð ð õì õï ð óïð ð ÍÌßÒÜßÎÜ ÍÑÚÌ
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(No.YA146)1-27
4.7.8 PURITY AND CONVERGENCE PURITY ADJUSTMENT Note: The final adjustment of CONVERGENCE must be done after the FOCUS adjustment. (CONVERGENCE is changed by FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment.
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(1) Demagnetize CRT with the demagnetizer. (2) Loosen the retainer screw of the deflection yoke. (3) Remove the wedges. (4) Input a green raster signal from the signal generator, and turn the screen to green raster. (5) Move the deflection yoke backward. (6) Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig.2)
Long lug
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Fig.1
PURITY MAGNETS
(7) Adjust the gap between two lugs so that the GREEN RASTER will come into the centre of the screen. (Fig.3) (8) Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green. (9) Insert the wedge to the top side of the deflection yoke so that it will not move. (10) Input a crosshatch signal. (11) Verify that the screen is horizontal. (12) Input red and blue raster signals, and make sure that purity is properly adjusted.
Short lug Bring the long lug over the short lug and position them horizontally.
Fig.2
(FRONT VIEW)
GREEN RASTER
CENTRE
Fig.3
1-28 (No.YA146)
STATIC CONVERGENCE ADJUSTMENT (1) Input a crosshatch signal. (2) Using 4-pole convergence magnets, overlap the red and blue lines in the centre of the screen (Fig.1) and turn them to magenta (red/blue). (3) Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the centre of the screen and turn them to white. Fig.1 (4) Repeat 2 and 3 above, and make best convergence.
(FRONT VIEW) RED GREEN BLUE
(FRONT VIEW)
DYNAMIC CONVERGENCE ADJUSTMENT (1) Move the deflection yoke up and down and overlap the lines in 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. (4) Adjust XV by XV coil. (Fig.4) After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the P/C magnets with glue.
(FRONT VIEW) RED GREEN BLUE BLUE GREEN RED RED GREEN BLUE RED GREEN BLUE BLUE GREEN RED RED GREEN BLUE
Fig.2
BLUE GREEN RED
Fig.3
(FRONT VIEW)
Xv
GREEN
Fig.4
(No.YA146)1-29
SECTION 5 TROUBLESHOOTING
5.1 SELF CHECK FUNCTIONS 5.1.1 OUTLINE This model has self check functions given below. When an abnormality has been detected, the SUB POWER is turned off and POWER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer. 5.1.2 SELF CHECK ITEMS Check item B1 over-current protection CRT neck broken protection Details of detection An over-current on the low B1 line is detected. Operation of CRT neck protection circuit. Method of detection The main microcomputer detects the possible abnormality at 24-msec. intervals and judges the results in every 16 time. Of the 16 times, if NG is detected more than 9 times, it is judged that there is an abnormality. State of abnormality When an abnormality has been detected, the SUB-POWER is turned off. While the SUBPOWER is being turned off, the POWER key on the remote control unit is not operational until the power cord is disconnected and connected again.
5.1.3 SELF CHECK INDICATING FUNCTION When an abnormality has been detected at about 5 seconds after the power was turned on, the SUB POWER is turned off immediately and the POWER LED flashes.
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[ INDICATION BY THE POWER LED] Item B1 over-current protection / CRT neck broken protection 0.3 seconds LED flashing intervals
1-30 (No.YA146)
Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan
(No.YA146)
Printed in Japan
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