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AV42 PD20ES
SERVICE MANUAL
PLASMA WIDE TELEVISION
AV42PD20ES
BASIC CHASSIS
MF
CONTENTS
! SPECIFICATIONS 2 ! SAFETY PRECAUTIONS 4 ! WARNING 5 ! FEATURES 6 ! FUNCTIONS 7 ! TECHNICAL INFORMATION 9 ! INSTALLATIONS 11 ! SPECIFIC SERVICE INSTRUCTIONS 12 ! SERVICE ADJUSTMENTS 21 ! TROUBLESHOOTING 36 ! PARTS LIST 37 OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM 2-1
1
CO PYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No.51955 May 2002
AV42PD20ES
SPECIFICATIONS
Item Dimensions ( W×H×D ) × × Mass TV RF System Colour System Sound System Teletext System Receiving Frequency VHF UHF French CAT V Intermediate Frequency VIF Carrier SIF Carrier PAL SECAM NT SC Power Input Power Consumption PDP Size Speaker Au dio Output An ten na Input Input / Output Terminals EXT-1 EXT-2 EXT-3 EXT-4 Au dio ou tput PC Input Headphone Jack Remote Contr ol Unit Rated Visible ar ea 104.8cm×114.0cm× 35.8c m 58.0kg CCIR B/G, I, D/K, L ,L' PAL / SECAM & NTSC 3.58 / NTSC 4.43 (NTSC play back only) A2 (B/G, D/K), NICAM (B/G, I, D/K, L) Fastext(United Kingdom system), TOP(German system), WST(World standard system) 47MHz 470MHz 470MHz862MHz 116MHz172MHz / 220MHz469MHz 38.9MHz(B/G, D/K, I, L) / 33.95MHz (L') 33.4MHz(5.5MHz : B/G) / 32.9MHz(6.0MHz : I) 32.4MHz(6.5MHz : D/K, L) / 40.45MHz(6.5MHz : L') 4.43MHz 4.40625MHz / 4.25MHz 3.58MHz / 4.43MHz (play bac k) AC 220V240V , 50Hz 380W ,2A (Max.) / 280W (Avg.) / 5.5w (Stand by) 105.7cm, [Meas ured diagonally] 8cm round×2, 16cm round×1 (sub woofer) / 4 5W + 5W ( L+R) / 20W(sub woofer) 75 unbalanc ed, Coaxial 21-pin Euro c onnector (SCART s ocket), Video, Audio L/R, RGB signal input are available TV broadcast output (Video and Audio L/R) are available 21-pin Euro c onnector (SCART s ocket), S-Video, Video, Audio L/R, RGB s ignal input are available AV selector (TV LINK) function is available 21-pin Euro c onnector (SCART s ocket), Video, Audio L/R, RGB signal input are available RCA pin type, S-Video, Video and Audio L/R signal input are available RCA pin type, Variable audio L/R output are available D-Sub 15pin×1 / signal (R, G, B / H&V SYNC) Stereo mini jac k ( 3.5mm ) RM-C59 (AAA/R03 dry cell battery×2) CONT ENTS
Colour Sub Carrier
Design and specifications are subject to change without notic e.
[21pin Euro conne ctor pin assignment]
[PC IN connector] (15pin D- Sub connect or pin assignm ent)
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No. 51955
AV42PD20ES
21-PIN EURO CONNECTOR (SCART socket) : EXT-1 / EXT-2 / EXT-3
(P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak)
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Signal Designation AUDIO R output AUDIO R input AUDIO L output AUDIO GND GND (B) AUDIO L input B input FUNCTION SW (SLOW SW) GND (G) SCL1 G input SDA1 GND (R) GND (YS) R / C input Ys input GND(VIDEO output) GND(VIDEO input) VIDEO output VIDEO / Y input COMMON GND R : 700mV(B-W), 75 C : 300mV(P-P) 75 Low : 0V - 0.4V, High : 1V - 3V, 75 500mV(rms), High impedance 700mV(B-W), 75 Low : 0V-3V, High : 8V-12V,High impedanc e Matching Value 500mV(rms), Low impedance 500mV(rms) High impedance 500mV(rms), Low impedanc e EXT-1 (TV OUT) (TV OUT) 700mV(B-W), 75 NC NC (only R) (TV) (only VIDEO input) EXT-2 (LINE OUT) (LINE OUT) (LINE OUT) EXT-3 NC NC NC NC NC NC NC (only C) NC NC
1V(P-P) (Negative going s ync), 75 1V(P-P) (Negative going s ync), 75
15-PIN D-SUB CONNECTOR (PC IN connector)
Each type signal of computer Model IBM PC/AT compatible Resolution 640×480 (VGA) Hor izontal Vertical Frequency [kHz] Frequency [Hz] 31.5 59.9 37.9 72.8 37.5 75.0 43.3 85.0 51.1 100.4 61.3 120.4 35.2 56.3 37.9 60.3 48.1 72.2 46.9 75.0 53.7 85.1 63.0 99.8 75.7 120.0 48.4 60.0 56.5 70.1 60.0 75.0 68.7 85.0 80.5 100.6 35.0 66.7 49.7 74.6 60.2 74.9 68.7 75.1 PC IN connector [ 15pin D-sub pin assignment ] Pin No. 1 2 3 4 5-8 9 10 11 12 13 14 15 Signal Name RED GREEN BLUE GND GND HSYNC VSYNC Details Red video signal Green video signal Blue video signal Not c onnected Signal earth Not c onnected Signal earth Not c onnected Horizontal synchronous signal Vertic al synchronous signal
800×600 (SVGA)
1024×768 (XGA)
Apple Macintosh
640×480 832×624 1024×768 1152×870
No. 51955
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PDP 02-03-19,
AV42PD20ES
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 identic al to thos e used in the original circuits. Service should be performed by qualified pers onnel 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. T hese 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 whic h have these special s afety characteristics are identified in the parts list of Servic e manual. Electrical components having su ch features ar e identified by shading on the schematics and by (! ) on the parts list in Service ! manual. The us e of a substitute replacement which does not have the same safety characteristics as the recommended replac ement part shown in the parts list of Service manual may cause shock, fire, or other hazards . 4. Do n't shor t between the LIVE side ground and ISOL ATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The differenc e 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 with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the s ame time. 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 PDP voltage setting should be checked or adjusted. 6. When service is required, observe the original lead dress. Extra prec aution should be given to assure correct lead dress in the high voltage circuit area. W here a s hort circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components. 7. Isolation Check (Safety for Electrical Shock Hazard) After re-ass embling 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 s afe to operate without danger of electrical shoc k. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the us er, particularly any expos ed metal part having a return path to the chass is should withs tand a voltage of 1500V AC (r.m.s.) for a period of one sec ond. This method of test requires a test equipment not generally found in the servic e trade. (2) Leakage Current Check Plug the AC line c ord 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 expos ed metal part having a return path to the chassis , to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 3.5mA AC (r.m.s.). However, in tropic al area, this must not exceed 0.2mA AC (r.m.s.). " Alternate Check Method Plug the AC line c ord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 / V or more sensitivity in the following manner. Connect a 1500 10W resis tor paralleled by a 0.15µF AC-type capacitor between an expos ed metal part and a known good earth ground (water pipe, etc.). Meas ure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each expos ed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the res is tor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured mus t not exceed 0.75V AC (r.m.s.). This corresponds to 3.5mA 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 VOLT MET ER (HAVING 1000 /V, OR MOR E SENSIT IVITY)
0.15F AC-T YPE PLACE T HIS PROBE ON EACH EXPOSED MET AL PART
1500 10W GOOD EARTH GROUND
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No.51955
AV42PD20ES
SAFETY PRECAUTIONS
1. The design of this product c ontains special hardware and 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 identic al to thos e used in the original circuits. Servic e should be performed by qualified personnel only. 2. Alterations of the design or circ uitry of the product 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 product have special safety-related characteristics. Thes e characteristics are often not evident from visual inspection nor c an the protection afforded by them necess ary be obtained by using replac ement c omponents
[UK MODEL]
rated for wattage, etc . Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical c omponents having such features are identified by shading on the schematics and by (!) on the Parts List in the Service Manual. The us e of a substitute replacement which does not hav e the same safety characteristics as the recommended replacement part s hown in the Parts List of Service Manual may c aus e shock, fire, or other haz ards.
4. The leads in the products are routed and dressed with ties, clamps, tubing's, barriers and the like to be s eparated from live parts, high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.
WARNING
1. The equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the repairer to ensure that thes e safety standards are maintained. 3. Repairs must be made in accordanc e with the relevant safety standards. 4. It is essential that s afety critical c omponents are replaced by approved parts. 5. If mains voltage s elector is provided, check setting for local voltage.
No. 51955
5
AV42PD20ES
FEATURES
" New chassis design enable us e of an interac tive on screen control. " The TELETEXT SYSTEM has a built-in FASTEXT (UK system), TOP (German system) and WST (world standard s ystem) system. " Pure FLAT PANEL reproduce fine textured. " Becaus e this TV unit corresponds to multiplex broadcast, users can enjoy music programs and sporting events with live realism. " In addition, BILINGUAL programs can be heard in their original language. " Built-in ECO (ECONOMY, ECOLOGY) sensor MODE. In accordance with the brightness in a room, the brightness and/or contrast of the picture can be adjusted automatic ally to make the optimum picture which is eas y on the eye. " Users can make VCR dubbing of picture and sound by controlling the AV selector to s elect an optional s ource at the EXT-2 output shown in figure.
TV
EXT-1
EXT-3
EXT-4
EXT-2
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No.51955
AV42PD20ES
FUNCTIONS
FRONT TERMINAL
1
2
3
4
5
FUNCTION NAME 1PC IN CONNECTOR (15pin D-sub connector) 2HEADPHONE JACK (MINI JACK) 3EXIT-4 TERMINAL 4VOLUME ( ) BUTTON
Press this button to dis play the volume level indicator. Press the up/down (/) buttons to change volume while the volume level indicator is dis played.
5/ (UP/DOWN) BUTTONS
You can use this button as the / buttons of the PR channel. Pressing the volume button makes this button function as the volume -/+ buttons.
LEFT SIDE TERMINAL
1
FUNCTION NAME 1 MAIN POWER SW 2 AC INLET 3 AERIAL SOCKET 4 AUDIO OUT (L, R) TERMINAL 5EXT-1(IN/OUT) TERMINAL 6EXT-2(IN/OUT) TERMINAL 7EXT-3(IN) TERMINAL
2
3
4
5
7 6
No. 51955
7
AV42PD20ES
REMOTE CONTROL UNIT
FUNCTION NAME
1 MUTING Key (
1 8
) 2 NUMBER ( ten) Key 3 ZOO M Key 4 HYPER SOUND Key 5 INFORMATION Key (
2
i
)
6 TV Key 7 VOLUME -/+ Key 8 STAND-BY Key ( POWER)
3 10 4 5 6 12
9
9 PIP Key A CO LO UR Key B TEXT Key ( ) C MENU / OK Key D PR CHANNEL UP/DOWN (/ ) Key E FUNCTION ( / ) ) & /) Key F MO DE Key (F. T/L) : LIST FLOF/TO P G HO LD Key ( H SUB PAG E Key ( I STORE Key ( )
11
7 15 16 20 17 18 23 24 26 22 14
13
19 21 25
J SIZE Key ( L INDEX Key (
)
?
K REVERSAL Key (
i
) )
)
M DISPLAY CANCEL Key ( N TV / TEXT / DVD Key O CHANG E Key ( ) P FREEZE Key Q SUB- PAGE (/ ) Key
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No. 51955
AV42PD20ES
TECHNICAL INFORMATION
PDP (PLASMA DISPLAY PANEL) DESCRIPTION
! CAUTION
Although a PDP is made with highly advanc ed precision, this does not nec essarily mean all of the cells operate correctly. The PDP inevitably inc ludes cell that do not light or light constantly. If the specifications (PDP performance) are unclear at the time of shipment, an adequate description cannot be c onveyed to the customer. In event of inquiries from c ustomers regarding PDP performance, chec k the following s pecifications in order to offer a suitable reply.
! CELL ARRANGEMENT
The PDP is cons tructed of front and rear glas s substrates provided with respec tive discharge elec trodes. Between these, neon for discharging and xenon for generating ultraviolet rays are enclos ed. One picture element (pixel) is composed of Red, Green and Blue (RGB) cells. The c ell pitch is 0.36 mm horiz ontal (1.08 mm per pixel) by 1.08mm vertical. As s hown in Fig.1, the cells are arranged for each RGB c olour. A pixel consists of each cell of R/G/B/ colour. The size of a cell is 0.36mm horizontally and 1.08mm vertically. Direction Horizontal(H) 1st pixel array 2nd pixel array 1023th pixel array 1024th pixel array
Vertical(V) 1ST pixel line 2nd pixel line
R G B R G B R G B R G B
R G B R G B
R G B R G B
767th pixel line 768th pixel line
R G B R G B R G B R G B
One pixel (1dot) R cell G cell B cell
R G B R G B
R G B R G B
V 1.08mm Pitch of pixel (Pitch of cell)
H 1.08mm Pitch of pixel
H 0.36mm Pitch of cell
Fig. 1 PIXEL (CELL) ARRANGEMENT
! PIXEL FAULT
There are two pixel faults - bright fault and dark fault - that are respectively defined as follows. (1) BRIGHT FAULT In this pixel fault, a c ell that should not light originally is lighting or flashing on and off. For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting or flashing on and off. (2) DARK FAULT In this pixel fault, a cell that should light originally is not lighting or not flas hing on and off or lighting with the bright ness twic e as brighter as originally lighting. For checking this pixel fault, input 100% of eac h RGB c olour and find out the cell that is not lighting or not flashing on and off or lighting with the brightness as brighter as originally lighting.
No. 51955
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AV42PD20ES
(3) PIXEL FAULT SPECIFICATION Screen display Criteria for number of faulted cell A zone: 2 or less than 2 in each colour B zone: 3 or less than 3 in each colour Criteria for number of consecutive faulted cell 2 or Les s than 2 consecutively
Br ight fault
All blac k screen Red level 100% on entire sc reen
Dark fault
Green lev el 100% on entire screen Blue level 100% on entire screen
A zone: 3 or less than 3 in each colour B zone: 8 or less than 8 in each colour
2 or Les s than 2 consecutively
(Note) A-zone : Center portion (area enc losed by 1/4 vertically from the top and bottom and 1/4 horiz ontally from the right and left s ides.) B-zone : Other area
(1/4H) B zone A zone (1/4V) (1/4H)
52.9cm
(1/4V)
(Note) The consecutive pixel fault that are diagonally or intensively generated shall be interpreted as follows :
cons ecutive 3
cons ecutive 3
cons ecutive 4
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No. 51955
AV42PD20ES
INSTALLATIONS
1. SAFETY PRECAUTION FOR PDP OPERATION
(1) Do not prevent the radiation of heat from back, top and flank sides of a PDP. Preventing the radiation of heat from each side causes high temperature within a PDP and may damage the inner c ircuit. (2) Ins tall a PDP in a place where is well ventilated. Ambient temperature s hould be within a range of 0 40 . (3) Ins tall in not dusty place. If dust covers the air intake holes , inside ventilation effect will reduc e. Then, it may damage the inner circuit. If the unit us es in such atmosphere, it will strongly require regular cleaning or maintenance.
2. REQUIREMENTS FOR SETTING
The following minimum space must be kept when a PDP is installed.
No. 51955
11
AV42PD20ES
SPECIFIC SERVICE INSTRUCTIONS
PRECAUTIONS FOR PDP USE
1. PRECAUTION DURING TRANSPORTATION
When this unit is delivered, the PDP body inside of the box will be subject to constant of gravitation under the rough handling (throwing, dropping, etc.) even though a rigid box is used. In suc h a cas e, the PDP may be damaged during transportation. In order to avoid an accident during transportation, care mus t be tak en to select a reliable carrier. Onc e a reliable carrier is s elected, advis e them how to handle a PDP properly during transportation. In addition, a PDP should be insured for its physical damage before shipment. This product is fragile bec aus e glass is widely used. Thus the following requirements for transportation should be obs erved. (1) Do n't apply vibration and impact. The glass of a PDP may be broken when the package is brought down on its side. When carrying the pac kage, it mus t always be handled with two persons with due c are not to apply vibration and impact on the package. (2) Do n't lay a PDP on its side. A PDP should always be placed upright during both trans portation and s afekeeping. Don't lay it on its side. The panel of a PDP is very fragile to the impact in the horizontal direction. When a car carries a PDP, load it on board the car in parallel with the moving direction of the car. Don't lay several PDPs one on top another. During safekeeping, don't lay more than two PDPs one on top another even if they are kept upright.
3. INFRARED RAYS
Becaus e the near infrared rays (8001000mm) radiate from the panel face, the neighboring infrared ray remote controllers, infrared c ommunication sys tems, etc. may malfunc tion. In thes e cases, take a measure to prevent the trouble to be c aus ed by direct rays (or reflected rays) from the screen by changing the direction of the screen fac e or keeping a s afe distance between a PDP and other devices .
4. OPTICAL FILTER (FRONT FILTER)
(1) Don't expose the optical filter direc tly to the sun for a long period of time. Exposing directly to the sun for a long period of time may change the special property of the optical filter, resulting in a change of colour. (2) Don't wipe the optical filter with s olvents such as benzene, thinner, etc. Wiping the optic al filter with solvents such as benzene, thinner, etc . may cause change in quality and peel off the c oasting on the surface. Lightly wipe the optic al filter with a soft cloth with less fluffy (e.g. pure flannel). (3) Becaus e the surface of the optical filter is fragile, don't scrub or hit it with a hard material.
5. PRECAUTION DURING CHANGING OF MONITOR UNIT ARMOR PARTS
Extreme care must be exercised for a PDP when the armor parts are c hanged. (1) Special attention should be paid not to apply pressure on the MONITOR UNIT glass surfac e during the work. (2) Don't touc h the panel surface in any way. (3) When changing the MONITOR UNIT armor parts (rear c over, front panel and optical filter), plac e the panel (PDP side) upside down in principle. At this time, a suitable mat mus t be us ed s o as to prevent the front s ide from damaging. However, excessively soft material (e.g. blanket) should not be us ed for this purpose in any way. If a blanket is used, the surface of a PDP is pressurized by the blank et when plac ing the panel upside down. Under such a c ondition, the PDP may be broken during the work.
2. RETANED-IMAGE AND BURNING
(1) When the s ame pattern is displayed c ontinuously for many hours, the burning of the screen is occurred in the same manner as for a CRT. T his will shorten the s ervic e life of a PDP. In order to avoid the burning of the screen, turn the display off when not neces sary. Also take such other measures as scrolling the screen and using a sc reen saver. In addition, periodic ally display the brightness reversal, the reversal to the complementary colour or the ins ertion of animated image - all these will make the display on the screen uniform. Since the higher brightness may cause the burning, us ers are requested to us e neutral colours as much as possible. Animated image will not cause the burning. (2) When the screen is switched after c ontinuous display, the retained-image may be s ignificant because the brightnes s of a certain portion becomes higher than that of other portions. This is c aused by a phenomenon in which a surface electrical discharge of the lighted portion is more activated than the non-lighted portions, resulting in higher brightness. (3) This unit has functions such as "PIXEL SHIFT", "COLOURREVERSE" and "REFRESH". They will reduce burning. Please refer to the instruction book for detail.
6. OTHER PRECAUTIONS
(1) Br ightness change in the scr een In order to save the power consumption, the power is controlled (with APS function) depending on the brightness of the screen. For this, the brightness may c hange after a short time when the picture of the screen is changed. However, this phenomenon is not a trouble. (2) Comp onent input setting The component signals 1080i and 1035i are the same frequencies. So, the unit does not detec t the signals automatic ally. In this c ase, set required s ignal by "HD SIGNAL MODE" in the setup menu.
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No. 51955
AV42PD20ES
DISASSEMBLY PROCEDURE
SEPARATION
SEPARATING THE PDP MONITOR UNIT AND LOWER BLOCK
[1] REMOVING THE BACK COVER 1. Remove the 5 screws marked A as shown in Fig.2. 2. Remove the 2 screws marked B as shown in Fig.2. 3. Remove the 3 screws marked C as shown in Fig.2. 4. Remove the back c over toward you. [2] REMOVING THE SIDE COVER 5. Remove the 3 screws marked D as shown in Fig.2. 6. Remove the 2 screws marked E as shown in Fig.2. [3] REMOVING THE BACK ST AY 7. Remove the side cov er. 8. Remove the 2 screws marked F as shown in Fig.2. [4] SEPARATING THE MONITOR UNIT LOWER BLOCK 9. Remove the 2 screws marked G as shown in Fig.2. 10. Separate the MONITOR UNIT and LOWER BLOCK as s hown in Fig.2. This separation should be performed by 2 or more persons.
SIDE COVER
BACK COVER
MONITOR UNIT
RECEIVER
LOWER BL OCK
Fig. 1
MONITOR UNIT
SIDE COVER
E
(× 2) × BACK STAY
D
( ×3)
F
(× 2)
BACK COVER
G
(×2) ×
RECEIVER UNIT
C
(× 3)
A
(×5) ×
B
Fig. 2
(× 2)
No. 51955
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AV42PD20ES
LOWER BLOCK
REMOVING THE LOWER BLOCK
[NOTE] The periphery of the receiver unit is a wooden cabinet. When the receiver unit is removed, hold it up slightly with both hands and put a mat or the like (cardboard, etc.) under the receiver unit s o as to prevent scratching the cabinet during the removal work. Then remove the rec eiver unit by withdrawing it toward you. [1] REMOVING THE RECEIVER UNIT 1. Remove the 4 screws marked A as shown in Fig.3. 2. Slightly raise the both sides of the rec eiver unit by hand and remove the receiver unit toward you. Thus the c onnector should be securely inserted when the receiver unit is installed again. 3. Unplug the connectors from the receiver unit. 4. Withdraw the receiver unit back ward. [2] REMOVING THE CASE COVER OF THE RECEIVER UNIT · Take out the RECEIVER UNIT. 1. Remove the 10 screws marked A as shown in Fig.4. 2. Withdraw the case cover toward you from chassis cas e. [3] REMOVING THE AV PLATE AND CHASSIS BEAM · Take out the RECEIVER UNIT. · Take out the CASE COVER. 1. Remove the 6 screws marked B as shown in Fig.4. 2. Unplug the connectors from the AV PLATE 3. Withdraw the AV PLATE toward you. 4. Remove the 2 screws marked C as shown in Fig.4. 5. Withdraw the chass is beam toward you from chassis cas e. [4] REMOVING THE UNDER PANEL (L&R) · Take out the RECEIVER UNIT. 1. Remove the 2 screws marked D (L&R) as shown in Fig.5. 2. Remove the 4 screws marked H (L&R) as shown in Fig.5. 3. As shown Fig.5, remove the under panel (L&R) in the arrow direction marked I. [5] REMOVING THE FRONT CONTROL PWB · Take out the RECEIVER UNIT. 4. Remove the 3(2+1) screws marked A as shown in Fig.5. 5. Remove the 6 screws marked B on the FRONT CONTROL PWB as shown in Fig.5. If nec essary, take off the wire clamp, connectors, etc. [6] REMOVING THE SPEAKER NET / CENTER PANEL / FRONT SW PWB / SW LEVER 1. Remove the 4 screws marked C (L&R side) as shown in Fig.5. 2. Then withdraw the SPEAKER NET toward you. 3. Remove the 4 screws marked E as shown in Fig.5. 4. Then remove the CENTER PANEL / FRONT SW PWB & SW LEVER as shown in Fig.5. [7] REMOVING THE SPEAKER · Take out the SPEAKER NET. 1. Remove the 4 screws marked F as shown in Fig.5. 2. Follow the same steps when removing the other hand speaker. 3. Remove the 4 screws marked G as shown in Fig.5.
CHECKING THE PW BOARD
1. To check the back side of the PW BOARD. 1) Pull out the chassis . 2) Erect the chas sis vertically so that you can easily check the back side of the PW BOARD. [CAUTION] " When erecting the PW BOARD, be careful so that there will be no contacting with other PW BOARD. " Before turning ON power, mak e sure that the wire c onnector is properly connec ted.0 " When conducting a check with power supplied, be sure to c onfirm that the EARTH WIRE is connected to the PW BOARD and others PW BOARD.
WIRE CLAMPING AND CABLE TYING
1. Be sure to clamp the wire. 2. Never remove the c able tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a new cable tie.
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No. 51955
AV42PD20ES
RECEIVER UNIT CONNECT OR SPEAKER BOX CASE COVER CHASSIS CASE
C
(×2) ×
B
(×6) ×
A
(×4) ×
CHASSIS BEAM RECEIVER UNIT Fig.3
AV PLATE
A
(× 10) × Fig.4
E
SPEAKER NET (L)
(×4) ×
SW LEVER CENTER PANEL TOP
FONT SW PWB
C
(× 2) × SPEAKER NET (R)
SPEAKER (L&R)
D F
(× 4) (× 1) ×
C
UNDER PANEL (L) FRONT CONT ROL PWB (× 2) ×
D
(× 1)
I B
(× 6) ×
H
(×2) ×
A
( ×2+1)
G H
(×2) × Fig.5 UNDER PANEL (R) (× 4)
SUB WOOFER SPEAKER
I
No. 51955
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AV42PD20ES
MONITOR UNIT
REMOVING THE MONITOR UNIT
REAR COVER [1] REMOVING THE REAR COVER / SIDE COVER Take out the MONITOR UNIT. Take out the RECEIVER UNIT. 1. Remove the 18 screws marked A as shown in Fig.1. 2. Remove the 17 screws marked B as shown in Fig.1. 3. Remove the 2 screws marked C as shown in Fig.1. 4. Remove the 3 screws marked D as shown in Fig.1. 5. Withdraw the REAR & SIDE COVER toward you. If nec essary, take off the wire clamp, connectors, plug. etc .
C
(×2)
SIDE COVER
D
(× 3) ×
B
(×17) ×
A
( ×18)
PDP UNIT POWER SW [2] REMOVING THE SW PWB COVER · Take out the REAR COVER / SIDE COVER. 1. Remove the 2 screws marked A as shown in Fig.2. 2. Remove the 2 screws marked B as shown in Fig.2. 3. Withdraw the SW PWB COVER toward you. [3] REMOVING THE SPEAKER / TERMINAL COVER · Take out the REAR COVER / SIDE COVER. · Take out the SW PWB COVER. 1. Remove the 6 screws marked C as shown in Fig.2. 2. Remove the 4 screws marked D as shown in Fig.2. 3. Withdraw the SPEAKER and TERMINAL COVER toward you. [4] REMOVING THE INPUT TERMINAL COVER · Take out the REAR COVER / SIDE COVER. 1. Remove the 5 screws marked E as shown in Fig.2. 2. Remove the 2 screws marked F as shown in Fig.2. 3. Pull out the INPUT TERMINAL COVER back ward. Fig.1
INPUT TERMINAL COVER PDP UNIT
F
(×2) ×
E
(×5) ×
D
( ×4)
C
(×6) ×
B
( ×2)
A
SW PWB COVER (×2) × Fig.2
TERMINAL COVER
[5] REMOVING THE PDP UNIT · Take out the REAR COVER / SIDE COVER. · Take out the SW PWB COVER. · Take out the TERMINAL COVER. · Take out the INPUT TERMINAL COVER. 1. Remove the 6 screws marked A as shown in Fig.3. 2. Take out the MONITOR UNIT from the FRONT PANEL ASS'Y(with OPTICAL FILTER). The remove of PDP UNIT should be performed by 2 or more persons. CAUTION : Do not damage the gas inlet If the gas inlet is damaged, the PDP UNIT must be replaced. So extr eme care should be taken not to dam age the gas inlet when you remove the PDP UNIT.
PDP UNIT
A
(×6) ×
GAS INLET
OPTICAL FILTER FRONT PANEL ASS'Y Fig.3
16
No. 51955
AV42PD20ES
REPLACEMENT OF MEMORY ICs
1. MEMORY ICs
This TV uses memory IC. In the memory IC, there are memorized data for c orrec tly operating the video and deflection circuits. When replac ing the memory IC, be sure to use an IC written with the initial values of data.
SE RV ICE ME NU 1. IF 3. AUDIO 5. VSM PRESET 7. PIP 9. SHIPPING (OFF) 1-0 : SELECT i 2. V/C 4. DEF 6. STATUS 8. - - 0. BUS FREE
2. PROCEDURES FOR REPLACING MEMORY ICs
PROCEDURE (1) Power off Switch the power off and disconnect the power plug.
: EXIT
Fig.1
(2)
Replace ICs. Be sure to use a memory IC written with the initial setting data.
SY STEM C ON STAN T S ET 1. DEST INATION E
(3)
Power on Connect the power plug and switc h the power on.
+
O K
: STORE
i
: EXIT
(4)
Check and set SYSTEM CONSTANT SET " The adjustment should not be done without signal. 1) Press the INFORMATION key and the MUT ING key of the REMOTE CONTROL UNIT simultaneous ly. 2) The SERVICE MENU screen of Fig. 1 will be displayed. 3) While the SERVICE MENU is displayed, press the INFORMATION key and MUTING key s imultaneously, and the SYSTEM CONSTANT SET screen of Fig. 2 will be display ed. 4) Check the setting values of the SYSTEM CONSTANT SET of Table 1. If value is different, selec t the setting item with the FUNCTION / key, and set the c orrect value with the FUNCTION / key. 5) Press the MENU(OK) key to memorize the setting value. 6) Press the INFORMATION key, and return to the normal screen.
Fig.2
2. 3. 4. 5. 6.
DIGIPURE PRO PIP PIC & T EXT TDA9178 FLAT
YES 1 TUNER YES YES YES
REMOTE CONTROL UNIT KEY ASSIGNMENT
MUTING (5) Setting of receive channels Set the rec eive channel. For setting, refer to the OPERATING INSTRUCTIONS.
POWER Key
(6)
Setting of SERVICE MENU Verify the setting items of the SERVICE MENU of Table 2, and reset where necessary. For setting, refer to the SERVICE ADJUSTMENTS.
INFORMATION FUNCTION / MENU FUNCTION /
(7)
User settings Check the us er setting values of Table 3, and if setting value is different, set the c orrec t value. For setting, refer to the OPERATING INSTRUCTIONS.
No. 51955
17
AV42PD20ES
SETTING VALUE OF SYSTEM CONSTANT SET (TABLE 1)
Setting item EK YES 1 TUNER YES YES YES Setting content EU NO 2 TUNER NO NO NO NO EI Setting value
1. DESTINATION 2. Digi Pure 3. PIP 4. PIC & TEXT 5. TDA9178 6. FLAT
E YES 1 TUNER YES YES YES
SERVICE MENU SETTING ITEMS (TABLE 2)
Setting item 1. IF 1. 2. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 1. 2. Setting value VCO ATT [Do not adjust] R. GAIN G. GAIN B. GAIN BRIGHT CONTRAST COLOUR HUE SHARP [Don't move] VCO ADJ USTMENT VIDEO AGC [Don't move] SYNC SLICE [Don't move] A MOVIE [Don't move] ERR LIMIT A2 ID THR Setting item 4. DEF Setting value 1. 2. 3. 4. 1. 2. 3. 4. 5. 6. 7. 8. V-SHIFT V-SIZE H-CENT H-SIZE CONT. BRIGHT SHARP COLOUR HUE R. GAIN G. GAIN B. GAIN
2. V / C
5. VSM PRESET COOL NORMAL WARM
3. AUDIO [Do not adju st]
7. PIP [Do not adju st]
1. PIP VCO ADJ 2. PIP VID AGC 3. PIP SNC SLI
18
No. 51955
AV42PD20ES
USER SETTING VALUE (TABLE 3)
Setting item SUB POWER SHIPPING CHANNEL PRESET CHANNEL ON PR1 See OPERATING INSTRUCT IONS. PICTURE SETTING TINT (COLOUR TEMP.) NORMAL ID S-IN DUBBING PICTURE FEATURES DIGITAL VNR Digi Pure COLOUR SYSTEM 4:3 AUTO ASPECT PIP POSITION AUTO AUTO TV : According to preset CH EXT : AUTO PANORAMIC RIGHT BELOW SOUND SET TING TONE BALANCE TV SPEAKER 3D SURROUND CENTER CENTER L/ R OFF LANGUAGE EDIT DECODER (EXT-2) SLEEP TIMER BLUE BLACK CHILD LOCK Setting value Setting item VOLUME DISPLAY ZOOM MODE Setting value Appropriate s ound volume INDICATED PANORAMIC EXT SETTING BLANK BLANK EXT-1 EXT-2 FEATURES OFF ON ID : No.0000, ALL CH : OFF Press the "0" key in CHILD LOCK menu to find to ID No.* ***. ALL CH : OFF INSTALL ENGLISH PR CHANNEL ONLY OTHERS : BLANK
No. 51955
19
AV42PD20ES
REPLACEMENT OF CHIP COMPONENT
! CAUTIONS
1. 2. 3. 4. Avoid heating for more than 3 seconds. Do not rub the electrodes and the resist parts of the pattern. When removing a c hip part, melt the s older adequately. Do not reuse a chip part after removing it.
! SOLDERING IRON
1. Use a high ins ulation s oldering iron with a thin pointed end of it. 2. A 30w s oldering iron is rec ommended for easily removing parts.
! 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 indic ated in the figure.
(2) Shift with tweezers and remove the chip part.
(2) Grasp the chip part with tweezers and plac e it on the s older. Then heat and melt the solder at both ends of the chip part.
# Transistors, diodes, variable r esistor s, etc (1) Apply extra solder to each lead.
# Transistors, diodes, variable r esistor s, etc (1) Apply solder to the pattern as indic ated in the figure. (2) Grasp the chip part with tweezers and place it on the solder. (3) First s older lead A as indicated in the figure.
SOLD E R
SOLD E R
(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.
A B C (4) Then solder leads B and C .
A B Note : After removing the part, remove remaining solder from the pattern. C
20
No.51955
AV42PD20ES
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There ar e 2 ways of adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components. 2. The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of th e initial setting values. The setting values which adjust the screen to the optimum condition can be differ ent fr om the initial setting values. 3. Make s ure that connection is c orrectly made to AC power sourc e. 4. Turn on the power of the TV and measuring instrument for warming up for at least 30 minutes before starting adjustment. 5. If the rec eive or input signal is not specified, use the most appropriate s ignal for adjustment. 6. Never touch parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this servic e adjustment. 7. Preparation for adjustment (pres etting) Unless otherwis e specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT USER MENU SETTING Setting Item ZOOM PICTURE MODE (VSM) TINT / CONTRAST / BRIGHT / SHARP / COLOUR SLEEP TIMER TREBLE / BASS / BALANCE ECO Setting Position PANORAMIC NORMAL CENTER OFF CENTER OFF
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter) 2. Oscilloscope 3. Signal generator (Pattern generator (Digital & Analog)) [PAL / SECAM / NTSC] 4. Remote control unit
ADJUSTMENT ITEMS
< MONITOR > ! Checking item · Adjustment of POWER VOLTAGE < RECEIVER > · Check ing of AFT CW VCO ! VSM pr esetting · Setting of VSM PRESET ! V/C circu it adjustment · Adjustment of WHITE BALANCE (High Light) · Adjustment of SUB BRIGHT · Adjustment of CONTRAST · Adjustment of SUB COLOUR · Adjustment of SUB COLOUR · Adjustment of SUB HUE · Adjustment of SUB HUE · Check ing of MAIN COLOUR DECODER VCO · Check ing of SUB COLOUR DECODER VCO ! DEFLECTION circuit adjustment · Adjustment of V. POSITION · Adjustment of V. SIZE · Adjustment of H. POSITION · Adjustment of H. SIZE
NOTE
This model (AV42PD20ES) consists of a MONITOR and a RECEIVER. However, the MONITOR and RECEIVER c annot be activated separately. T rying the s eparate ac tivation of the MONITOR or RECEIVER may c ause a trouble. Always try to ac tivate the MONITOR and RECEIVER as a unit during a s ervic e repair.
No. 51955
21
AV42PD20ES
ADJUSTMENT PART LOCATIONS
! RECEIVER
! MONITOR (PDP)
22
No. 51955
AV42PD20ES
BASIC OPERATION SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
2. SERVICE MENU ITEMS
With the SERVICE MENU, various settings (adjustments) c an be made, and they are broadly c lassified in the following items of settings (adjus tments ): (1) 1. IF This mode adjusts the setting values of the IF circuit. (2) 2.V/C This mode adjusts the setting values of the VIDEO / CHROMA circuit. (3) 3.AUDIO This mode adjusts the setting values of the multiplic ity SOUND circuit. (4) 4.DEF This mode adjusts the setting values of the DEFLECTION circuit. (5) 5.VSM PRESET This mode adjusts the initial s etting values of COOL, NORMAL and WARM. (VSM : Video Status Memory)
3. BASIC OPERATION OF SERVICE MENU
(1) Ho w to enter SERVICE MENU Press the INFORMATION key and the MUTING key of the REMOTE CONTROL UNIT (Fig. 2) simultaneously, and the SERVICE MENU screen of Fig. 1 will be displayed.
SERVICE MENU
SERVICE MENU 1. IF 3. AUDIO 5. VSM PRESET 7. PIP 9. SHIPPING (OFF ) 2. V/C 4. DEF 6. STAT US 8. - - 0. BUS FR EE
1-0 : SELEC T i : EXIT
Fig.1
(2) Selection of SUB MENU SCREEN Press one of keys 1 5 (Fig. 2) of the REMOTE CONTROL UNIT and s elect the SUB MENU SCREEN (See Fig. 3), form the SERVICE MENU. SERVICE MENU SUB MENU 1. 2. 3. 4. 5. 6. 7. 8. 9. 0. IF V/ C AUDIO DEF VSM PRESET ST ATUS PIP - -SHIPPING (OFF) BUSS FREE
REMOTE CONTROL UNIT KEY ASSIGNMENT
MUTING
POWER key
No t to ad just
NUMBERS (ten) k ey
No t to ad just INFORMATION FUNCTION / MENU/OK FUNCTION /
Fig.2
No. 51955
23
AV42PD20ES
SERVICE MENU FLOW CHART
SERVICE MENU
S ERV ICE M ENU 1. IF 3. AUD IO 5. VSM PRESET 7. PIP 9. SHIPPING(OF F) 1-0 : SELECT i 2. V/C 4. DEF 6. ST AT US 8. - - 0. BUS FREE : EXIT
Don't select under the adjustm ent as this menu is set in ON aft er th e inspection .
Do no t adjust this Item.
SUB MENU 4. DEF
1. V -S HIFT 2. V -S IZE 3. H -CE NT 4. H -SIZ E DE F F ULL ** Hz **** (****) i : EXIT
1.IF
IF S ER VICE M ENU 1. VCO 2. AT T ON / OFF Do no t adjust this Item.
1. V-SHIFT
-/ +
OK : STORE
1-2 : SELECT
i
: EXIT
5. VSM PRESET
V SM P RE SE T 1.CONT CO OL NO RMAL W AR M 1. 2. 3. 4. 5. 6. 7. 8. CONT. BRIGHT SHARP COLO UR HUE R. GAIN G. GAIN B. GAIN NORM AL * i : EXIT
1.VCO (CW)
V CO (CW ) **.** M Hz **. MAIN TOO HIGH ABOVE REF JUST REF BELOW REF TOO LOW i : EXIT
-/ +
OK : STORE
DO NOT ADJUST 6. STATUS
S TATUS 1.SOFT 1. R GAIN **** i : EXIT
2. V/C
V /C P AL
-/ +
OK : STORE
i
: EXIT
-/ +
OK : STORE
1. R . G AIN 2. G . GAIN 3. B . G AIN 4. B RIG HT 5. C ONT. 6. C OLO UR 7. H UE 8. S HARP 9. V CO ADJ 10. V ID AGC 11. S Y NC SL I 12. A M O VIE
7. PIP
P IP 1. PIP V CO ADJ 2. PIP V ID AG C 3. PIP S NC SL I 1.PIP VC O ADJ ***** i : EXIT
3. AUDIO
AUDIO 1. ERR LIMIT 0AH
-/ +
OK : STORE
C AD BITS = ********
1. ERR L IM IT 2. A2 ID THR
-/ +
OK : STORE
i
: EXIT
Fig.3
24
No. 51955
AV42PD20ES
(3) Setting methods " Method of Setting 1.IF as [VCO] (The adjustment should not be done without s ignal.) 1 Key Select 1.IF. 1 Key Select 1. VCO (CW) Check the arrow position between the "ABOVE REF. and BELOW REF. INFORMATION Key Return to the SERVICE MENU screen.
" Method of s etting 2.V/C, 4.DEF and 5.VSM PRESET. 25 Key Select one from 2. V/C, 4. DEF and 5. VSM PRESET. FUNCTION UP/DOWN Key Select s etting items. FUNCTION LEFT/RIGHT Key Set (adjust) the setting values of the setting items. MENU (OK) Key Memorize the s etting value. (Before storing the setting values in memory, do not pres s the CH, TV, POWER ON / OFF key - if you do, the values will not be stored in memory.) INFORMATION Key Return to the SERVICE MENU screen.
" Do not adjust 3.AUDIO, 6. STATUS, 7. PIP, 8. --- , 9. SHIPPING (OFF) and 0. BUS FREE function.
(4) Release of SERVICE MENU 1) After completing the adjustment, return to the SERVICE MENU, then again press the INFORMATION key to return to the normal screen.
No. 51955
25
AV42PD20ES
INITIAL SETTING VALUE OF SERVICE MENU
1. Ad justment 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 optim um condition may differ from the initial setting. 2. Do no t change the initial setting values of the setting (Adjustment) items not listed in " ADJUSTMENT".
1.IF
SETTING ITEM 1.VCO 2.ATT ON/OFF Initial setting value Proper value by adjustment. See "adjustment of VCO" contents Do not adjust this item.
2.V/C (VIDEO / CHROMA) (
Colour system Setting item 1. R. GAIN 2. G. GAIN 3. B. GAIN 4. BRIGHT 5. CONT RAST 6. COLOUR 7. HUE 8. SHARP 9. VCO ADJUSTMENT 10. VIDEO AGC 11. SYNC SL ICE 12. A. MOVIE
is adjustment not to required ) Initial setting value PAL -15 -15 -15 20 0 -10 011 0 Automatic ally optimized after adjustment 00 +07 01 SECAM NT SC
3.AUDIO (Do not adjust)
Setting item 1. ERR LIMIT 2. A2 ID THR Variable range 00HFFH 00HFFH Initial setting value (Fixed value) 10 19
4.DEF
(
is adjustment not to required ) VALUE
Setting item
FULL 50Hz p
1. V-SHIFT 2. V-SIZ E 3. H-CENT 4. H-SIZE
-03 00 -06 00
26
No. 51955
AV42PD20ES
5.VSM PRESET
VSM pr eset mode Setting item 1. CONT . 2. BRIGHT 3. SHARP 4. COLOUR 5. HUE 6. R. GAIN 7. G. GAIN 8. B. GAIN COOL +12 00 -12 00 00 00 00 00 NORMAL +12 00 -12 00 00 00 00 00 WARM 00 00 -12 -01 00 00 00 00
7.PIP (
is adjustment not to required ) Initial setting value Setting item PAL SECAM NT SC
1. PIP VCO ADJ 2. PIP VID AGC 3. PIP SNC SLI 00 +07
No. 51955
27
AV42PD20ES
ADJUSTMENT
MONITOR
Item Ad justment of POWER VOLTAGE Measuring instrument DC voltmeter Signal gener ator Test point Ad justment part Description Ad justment of Vs(+170V) voltage. 1. Input the colour bar signal to RGB input terminal. 2. Connect the digital voltmeter across TP3 and TP2 (#). 3. Adjust the VR3 to s et the voltage within ±1V of the voltage (Vs as s hown on the SERIAL LABEL) designed for the PDP module. Ad justment of Vd(+60V) voltage. 1. Input the colour bar signal to RGB input terminal. 2. Connect the digital voltmeter across TP4 and TP2 ( #). 3. Adjust the VR4 to s et the voltage within ±1V of the voltage (Vs as s hown on the SERIAL LABEL) designed for the PDP module. Ad justment of +5V voltage. 1. Input the colour bar signal to RGB input terminal. 2. Connect the digital voltmeter across TP1 and TP2 (#). 3. Confirm that the voltage of the TP1 and TP2 (#) have bec ome 5.1V±0.1V. If not, adjust the VR1 at the +5V ADJ of the POWER PWB so that the voltage become 5.1V±0.1V.
TP-1 (+5V) VR1 (+5) TP-2 (#) VR3 (+170V) # TP-3 (+170V) VR4 (+60V) TP-4 (+60V)
RECEIVER
Checking of AFT CW VCO Remote control unit 1.VCO " Under normal c onditions, no adjustment is required confirmation adjustment. 1. 2. 3. 4. Do no t select this item
i : EXIT
1. IF
IF SERVICE MENU 1. VCO 2. AT ON/OF T F
Select 1.IF from the SERVICE MENU. Then select 1.VCO from the 1.IF SERVICE MENU (Fig.1). Receive any broadc ast (55.75MHz or 216.00MHz is best). In the VCO adjustment screen, the yellow allows point (Fig.2) to the characters. Chec k the yellow allow position where pointed to the character from "ABOVE REF" to "BELLOW REF" (Fig.2 & Fig.3).
1-2 : SELECT
The arrow position menu AFC voltage level.
Fig.1
VC O M ENU
VCO(CW) TO HIGH O ABO REF VE JUST RE F BELOW REF TO LO O W i : EXIT ****MHz
YELLOW arr ow
V
(AFC)
TOO HIGH ABOVE REF. JUST REF. BELOW REF. TOO LOW.
t
Fig.2
Fig.3
28
No. 51955
AV42PD20ES
VSM PRESET SETTING
Item Setting of VSM PRESET Measuring instrument Remote control unit Test point 1. 2. 3. 4. 5. 6. 7. 8. Ad justment part CONT. BRIGHT SHARP COLOUR HUE R. GAIN G. GAIN B. GAIN Description 1. Press the MENU (OK) key and s elect COOL mode with the remote control unit. 2. Select 5.VSM PRESET from the SERVICE MENU. 3. Adjust the FUNCTION / and / key to bring the set values of 1.CONT 8.B GAIN to the initial setting values as shown in the before table. 4. Press the MENU key and memoriz e the s et value. 5. Respectively select the VSM PRESET mode for NORMAL and WARM, and make similar adjustment as in 3 above. 6. Press the MENU (OK) key and memorize the set value. Refer to OPERATING INSTRUCTIONS for the PICTURE MODE.
V/C (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 adjust the screen to the optimum condition can be different from the initial setting values.
Item Ad justment of WHITE BALANCE (High-Light)
Measuring instrument Signal gener ator Remote control unit
Test point
Ad justment part 1. R. GAIN 2. G. GAIN
Description " Set the PICTURE MODE to NORMAL. 1. Receive a black and white signal (colour off). 2. Select 2. V/C from the SERVICE MENU. 3. Modify 1.R.GAIN and 2.G.GAIN value to set the white balance ( high light ). 4. Press the MENU (OK) key and memorize the set value. 5. Change the contrast and brightness up and down with the remote control unit from Lowlight to Highlight, and chec k that the trac king of the white balance is good. Receive any broadc ast. Select 2.V/C from the SERVICE MENU. Select 4.BRIGHT with the FUNCTION / key. Set the initial setting value with the FUNCTION / key. If the brightness is not the best with the initial setting value, make fine adjustment until you get the bes t brightness. 6. Press the MENU (OK) key and memorize the set value. 1. Receive a PAL colour bar signal. 2. Switch the sub power SW to OFF & ON. 3. Select 2.V/C from the SERVICE MENU. 1. Select 5.CONTRAST with the FUNCTION / key. 5. Set the initial setting value with the FUNCTION / key. 6. If the contrast is not the bes t with the initial setting value, make fine adjustment until you get the best contras t. 7. Press the MENU (OK) key and memorize the set value. 1. 2. 3. 4. 5.
Ad justment of SUB BRIGHT
Remote control unit
4.BRIGHT
Ad justment of SUB CONTRAST
Remote control unit
5.CONTRAST
No. 51955
29
AV42PD20ES
Item Ad justment of SUB COLOUR
Measuring instrument Remote control unit
Test point
Ad justment part 6.COLOUR
Description [Method of adjustm ent without m easuring instrument] < PAL COLOUR > 1. Receive PAL broadcast. 2. Select 2.V/C from the SERVICE MENU. 3. Select 6.COLOUR with the FUNCTION / key. 4. Set the initial s etting value for PAL COLOUR with the FUNCTION / key. 5. If the colour is not the best with the initial set value, make fine adjustment until you get the best colour. 6. Press the MENU (OK) key and memorize the set value.
< SECAM COLOUR > 1. Receive a SECAM broadc ast. 2. Make fine adjustment of SECAM COLOUR in the same manner as for above.
SUB POWER key
NUMBERS key < NT SC 3.58 COLOUR > 1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal from the EXT terminal. 2. Make s imilar fine adjus tment of NTSC 3.58 COLOUR in the same manner as for above.
i ( INFORMATION ) key MENU ( OK ) key
< NT SC 4.43 COLOUR > 1. Input a NTSC 4.43MHz COMPOSITE VIDEO s ignal from the EXT terminal. 2. Make similar fine adjustment of 4.43 COLOUR in the same manner as for above.
FUNCTION / &
/ key
30
No. 51955
AV42PD20ES
Item Ad justment of SUB COLOUR
Measuring instrument Signal gener ator
Test point TP-R TP-E(# )
Ad justment part 6.COLOUR
Description [Method of adjustm ent using measur ing instrument] < PAL COLOUR > 1. Receive a PAL full field colour bar signal (75% white). 2. Select 2.V/C from the SERVICE MENU. 3. Select 6.COLOUR with the FUNCTION / key. 4. Set the initial setting value of PAL COLOUR with the FUNCTION / key. 5. Connect the osc illosc ope between TP-R and TP-E 6. Adjust PAL COLOUR and bring the value of (A) in the to illustration (Fig.1) to -140mV(W-R). 7. Press the MENU (OK) key and memorize the setting value.
[CRT Oscilloscope SOCKET PWB ] Remote control unit
75%
W
Ye
Mg
R
A(W- R)
()
()
0%
Cy G
B
Fig. 1
< SECAM COLOUR > 1. Receive a SECAM full field c olour bar signal (75% white). 2. Set the initial setting value of SECAM COLOUR with the FUNCTION / key. 3. Adjust SECAM COLOUR and bring the value of (A) in the illustration (Fig.2) to -140mV(W-R). 4. Press the MENU (OK) key and memorize the setting value. ()
75%
W
Ye Cy G Mg
R
B
B
(W- R)
< NT SC 3.58 COLOUR > () 1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar with 75% white) from the EXT terminal. 2. Set the initial s etting value of NTSC 3.58 COLOUR with the FUNCTION / key. 3. Adjust NTSC 3.58 COLOUR and bring the value of (B) of the illustration (Fig.1) to -140mV(W -B). 4. Press the MENU (OK) key and memorize the setting value.
0%
Fig. 2
< NT SC 4.43 COLOUR > 1. When NTSC3.58 adjustment has done, then NTSC4.43 adjustment will be automatically s et at the respec tive values.
No. 51955
31
AV42PD20ES
Item Ad justment of SUB HUE
Measuring instrument Remote control unit
Test point
Ad justment part 7.HUE
Description [Method of adjustm ent without m easuring instrument] < NT SC 3.58 HUE > 1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar with 75% white) from the EXT terminal. 2. Select 2.V/C from the SERVICE MENU. 3. Select 7.HUE with the FUNCTION / key. 4. Set the initial setting value of NTSC 3.58 HUE with the FUNCTION / key. 5. If you c annot get the best HUE with the initial s etting value, make fine adjustment until you get the bes t HUE. 6. Press the MENU (OK) key and memorize the set value.
< NT SC 4.43 HUE > 1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
Ad justment of SUB HUE
Signal gener ator
TP-R TP-E(# ) # [CRT Oscilloscope SOCKET PWB] Remote control unit
7.HUE
[Method of adjustm ent using measur ing instrument] < NT SC 3.58 HUE > 1. Input a NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar with 75% white) from the EXT terminal. 2. Select 2.V/C from the SERVICE MENU. 2. Select 7.HUE with the FUNCTION / key. 4. Set the initial setting value of NTSC 3.58 HUE with the FUNCTION / key. 5. Connect the osc illosc ope between TP-R and TP-E 6. Adjust NTSC 3.58 HUE to bring the value of (B) in the illustration to 30mV(W-Mg). 7. Press the MENU (OK) key and memorize the setting value
75%
W
Ye
Mg
R
(B)
()
(0)
()
0%
Cy
G
B
< NT SC 4.43 HUE > 1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
32
No. 51955
AV42PD20ES
Item
Measuring instrument
Test point
Ad justment part 9. VCO
Description 1. Input a PAL half colour bar signal (75% white) from the EXT terminal. 2. Select 2. V/C from the SERVICE MENU. 1. Select 9. VCO adjustment with the FUNCTION / key. 4. Press the MENU (OK) key then automatically optimized.
Checking Signal of gener ator MAIN COLOUR DECODER VCO Remote control unit
Checking Signal of gener ator PIP COLOUR DECODER VCO Remote control unit
7. PIP
1. Select 7. PIP from the SERVICE MENU. 2. Receiver a PAL half colour bar (75% white) signal for the SUB-PICTURE (Right-Side picture) 3. Select 1. PIP VOC ADJ. with the FUNCTION / key. 4. Press the MENU (OK) key then automatically optimized.
MAIN PIC TURE
SUBPIC TURE
No. 51955
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AV42PD20ES
DEFLECTION CIRCUIT ADJUSTMENT
" When the FULL mode has been established, the setting of other modes will be don e automatically. Ho wever, if the picture quality has not been optimized, adjust each mod e again, r espectively. " There are 5 aspect modes ( FULL, PANORAMIC, REGULAR, 16:9 ZOOM, 14:9 ZOOM) of the adjustment depending upon the kind of signals. " The 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.
Item
Measuring instrument
Test point
Ad justment part 1. V- SHIFT
Description Set the ASPECT MODE to FULL. Receive a circle pattern signal. Select 4.DEF from the SERVICE MENU. Select 1.V-SHIFT with the FUNCTION / key. Adjust V-SHIFT to make A = B. Check the adjustment condition in other aspect mode. If it is a wrong condition, re-adjust in "FULL" mode with 1. V-SHIFT. 6. Press the MENU (OK) key and memorize the set value. 1. 2. 3. 4. 5.
Ad justment Signal of V. POSITION gener ator Remote control unit
A
B
Ad justment of V. SIZ E
Signal gener ator Remote control unit
2.V-SIZE
7. Receive a cross hatch signal. 8. Select 2.V-SIZE and set the initial s etting value to zero(0). 9. Adjust the V-SIZE to the vertical screen size of the picture becomes the value given figure. 10. Press the MENU (OK) key and memorize the set value.
Screen size (96%)
Picture size 100%
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No. 51955
AV42PD20ES
Item Ad justment of H. POSIT ION
Measuring instrument Signal gener ator Remote control unit
Test point
Ad justment part 3.H-CENT. 11. 12. 13. 14.
Description Receive a cross hatch with circle pattern signal. Select 3.H-CENT and set the initial setting value. Adjust H-CENT to make C=D. Press the MENU (OK) key and memorize the set value.
(C)
(D)
Ad justment of H. SIZ E
Signal gener ator Remote control unit
4.H-SIZE
15. Receive a cross hatch pattern signal. 16. Select 4.H-SIZE and set the initial setting value to zero(0). 17. Adjust the H-SIZE and make sure that the horizontal screen size of the picture is in the table bellow. 18. Press the MENU (OK) key and memorize the set value. 19. Input the NTSC VIDEO signal (60Hz) from the EXT terminal, and make sure that the horizontal screen size of the picture becomes the value given figure. 20. Press the MENU (OK) key and memorize the s et value.
Screen size(96%)
Picture siz 100% e
No. 51955
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AV42PD20ES
TROUBLESHOOTING
MONITOR UNIT DOES NOT WORK
(When the LED blinks with RED and GREEN alternatively) 1) 2) 3) 4) 5) Press the RESET SW while the power is turned off. Then, wait for two sec onds after turning the power on. Tune the power off after two s econds. Release the RESET PW. The main unit of PDP will be ac tivated when the power is tuned on. MONITOR UNIT
RECEIVER INPUT TERMINAL
AUDIO IN (sub woofer) RESET SW
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No. 51955