JVC InteriArt LT-26C31BC Service Manual

SERVICE MANUAL

WIDE LCD PANEL TELEVISION

YA16920048

LT-26C31BC

BASIC CHASSIS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-46

TABLE OF CONTENTS

No.YA169

2004/8

SPECIFICATION

Items Contents

Dimensions (W × H × D) 70.3 cm × 56.0 cm × 2.6 cm (Included stand)

70.3 cm × 49.1 cm × 9.4 cm (TV only)

Mass 19.0 kg (Included stand)

18.3 kg (TV only)

TV RF System CCIR B/G, I, D/K, L

Colour System PAL / SECAM / NTSC 3.58 / NTSC 4.43 (NTSC:EXT only).

Stereo System A2 (B/G, D/K), NICAM (B/G, I, D/K, L)

Teletext System FLOF (Fastext), TOP, WST (World Standard System)

Receiving Frequency

Intermediate Frequency

Colour Sub Carrier Frequency

Power Input AC110V - AC240 V, 50 Hz / 60 Hz

Power Consumption 148 W [Standby: 2.8 W]

Aerial Input 75 Ω unbalanced, coaxial Screen Size Diagonal: 66 cm (H: 33.9cm × V: 56.6cm) Display Resolution Horizonal : 1280 dots × Vertical : 768 dots (W-XGA) Speaker 6.6 cm round × 2 (Oblique corn)

Audio Power Output 10 W + 10 W (Rated power output)

EXT-1 (Input/Output) 21 pin Euro connector (SCART socket)

EXT-2 (Input/Output) 21 pin Euro connector (SCART socket)

EXT-3 (Input) S-Video

EXT-4 (Input) Component video

AUDIO OUT terminal 500mV(rms), Low impedance, RCA pin jack × 2 Headphone jack 3.5 mm stereo mini jack × 1 Remote Control Unit RM-C1808 (AA/R6 dry cell battery × 2)

VHF UHF

CATV

VIF SIF

PAL

SECAM

NTSC

Video Audio

Audio (L/R)

47MHz ~ 470MHz 470MHz ~ 862MHz 116MHz ~ 172MHz / 220MHz ~ 469MHz

38.9MHz(B/G, D/K, I)

33.4MHz(5.5MHz:B/G) / 32.9MHz(6.0MHz:I) / 32.4MHz(6.5MHz:L,D/K)

4.43MHz

4.40625MHz / 4.25MHz

3.58MHz / 4.43MHz

Video input, Audio L/R inputs and RGB inputs are available. TV broadcast outputs (Video and Audio L/R) are available.

Video input, S-VIDEO (Y/C) input, Audio L/R inputs and RGB inputs are available. Video and Audio L/R outputs are available. T-V LINK functions are available.

Mini-DIN 4 pin × 1 Y: 1V (p-p), Positive (Negative sync provided), 75 Ω C: 0.286V (p-p) (Burst signal), 75 Ω 1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 1 500mV (rms), High impedance, RCA pin jack × 2

RCA pin jack × 3 Y : 1V(p-p), 75 Ω Pb / B-Y: 0.7V(p-p), 75 Ω Pr / R-Y : 0.7V(p-p), 75 Ω

Component video (Pr, Pb, Y) inputs (625p, 525p, 1125i) and Audio L/R inputs are available. 525p and 625p are progressive scanning signals. Some DVD players can output these signals. 1125i is one of the new high-definition signals.

500mV(rms) (-4dBs), High impedance, RCA pin jack × 2

Design and specifications subject to change without notice.

1-2 (No.YA169)

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(1) The design of this product contains special hardware,

many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only.

(2) Alterations of the design or circuitry of the products should

not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection 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 10kΩ

2W resistor to the anode button.

(8) When service is required, observe the original lead dress.

Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

(9) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output 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 1000Ω per volt or more sensitivity in the following manner. Connect a 1500Ω 10W resistor paralleled by a 0.15µF 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)

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED ME TAL PAR T

(No.YA169)1-3

1.2 INSTALLATION

1.2.1 HEAT DISSIPATION

If the heat dissipation vent behind this unit is blocked, cooling efficiency may deteriorate and temperature inside the unit will rise. Therefore, please make sure pay attention not to block the heat dissipation vent as well as the ventilation outlet behind the unit and ensure that there is room for ventilation around it.

Distance recommendations

Avoid improper installation and never position the unit where good ventilation is impossible.

150 mm

When installing this TV, distance recommendations must be maintained between the set and the wall, as well as inside a tightly enclosed area or piece of furniture. Keep to the minimum distance guidelines shown for safe operation.

1.2.2 INSTALLATION REQUIREMENTS

To ensure safety in an emergency such as an earthquake, and to prevent accidents, ensure that measures are taken to prevent the TV dropping or falling over. Use the supplied screws to firmly attach the supplied hooks to the back of the TV, and use commercially available cord to fix the TV to rigid components such as walls and columns.

200 mm 200 mm

150 mm

50 mm

Supplied hooks

1.2.3 NOTES ON HANDLING

(1) WHEN TAKING UNIT OUT OF A PACKING CASE

When taking the unit out of a packing case, do not grasp the upper part of the unit. If you take the unit out while grasping the upper part, the LCD PANEL may be damaged because of a pressure. Instead of grasping the upper part, put your hands on the lower backside or sides of the unit.

(2) AS FOR PRESSING OR TOUCHING A SPEAKER

Be careful not to press the opening of the speaker in the lower part of the unit and around them since the decorative sheet on the surface of the openings may be deformed.

1-4 (No.YA169)

1.3 HANDLING LCD PANEL

1.3.1 PRECAUTIONS FOR TRANSPORTATION

When transporting the unit, pressure exerted on the internal LCD panel due to improper handling (such as tossing and dropping) may cause damages even when the unit is carefully packed. To prevent accidents from occurring during transportation, pay careful attention before delivery, such as through explaining the handling instructions to transporters. Ensure that the following requirements are met during transportation, as the LCD panel of this unit is made of glass and therefore fragile:

(1) USE A SPECIAL PACKING CASE FOR THE LCD PANEL

When transporting the LCD panel of the unit, use a special packing case (packing materials). A special packing case is used when a LCD panel is supplied as a service spare part.

(2) ATTACH PROTECTION SHEET TO THE FRONT

Since the front (display part) of the panel is vulnerable, attach the protection sheet to the front of the LCD panel before transportation. Protection sheet is used when a LCD panel is supplied as a service spare part.

(3) AVOID VIBRATIONS AND IMPACTS

The unit may be broken if it is toppled sideways even when properly packed. Continuous vibration may shift the gap of the panel, and the unit may not be able to display images properly. Ensure that the unit is carried by at least 2 persons and pay careful attention not to exert any vibration or impact on it.

(4) DO NOT PLACE EQUIPMENT HORIZONTALLY

Ensure that it is placed upright and not horizontally during transportation and storage as the LCD panel is very vulnerable to lateral impacts and may break. During transportation, ensure that the unit is loaded along the traveling direction of the vehicle, and avoid stacking them on one another. For storage, ensure that they are stacked in 2 layers or less even when placed upright.

1.3.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)

(1) Avoid placing the unit under direct sunlight over a prolonged period of time. This may cause the optical filter to deteriorate in

quality and colour. (2) Clean the filter surface by wiping it softly and lightly with a soft and lightly fuzz cloth (such as outing flannel). (3) Do not use solvents such as benzene or thinner to wipe the filter surface. This may cause the filter to deteriorate in quality or the

coating on the surface to come off. When cleaning the filter, usually use the neutral detergent diluted with water. When cleaning

the dirty filter, use water-diluted ethanol. (4) Since the filter surface is fragile, do not scratch or hit it with hard materials. Be careful enough not to touch the front surface,

especially when taking the unit out of the packing case or during transportation.

1.3.3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR PARTS

Take note of the following when replacing exterior parts (REAR COVER, FRONT PANEL, etc.):

(1) Do not exert pressure on the front of the LCD panel (filter surface). It may cause irregular colour. (2) Pay careful attention not to scratch or stain the front of the LCD panel (filter surface) with hands. (3) When replacing exterior parts, the front (LCD panel) should be placed facing downward. Place a mat, etc. underneath to avoid

causing scratches to the front (filter surface).

(No.YA169)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

2.1.1 FUNCTION / CIRCUITS

• DIST (Digital Image Scaling Technology) employs an interpolation method that doubles the scanning lines to realize 1250-line flickerfree picture making it especially suitable for reproducing highresolution pictures even on large-screen displays.

• New chassis design enable use of an interactive on screen control.

• The TELETEXT SYSTEM has a built-in FASTEXT (UK system), TOP (German system) and WST (world standard system) system.

• Because 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.

• Users can make VCR dubbing of picture and sound by controlling the AV selector to select an optional source at the EXT-2 output shown in figure.

2.1.2 21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2

Pin No. Signal designation Matching value EXT-1 EXT-2

1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) 2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) 3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) 4 AUDIO GND Used Used 5 GND (B) Used Used 6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2) 7 B input 700mV 8 FUNCTION SW

(SLOW SW)

9 GND (G) Used Used

10 SCL / T-V LINK Not used Used

11 G input 700mV 12 SDA Not used Used (SDA2) 13 GND (R) Used Used 14 GND (YS) Used Not used 15 R / C input R : 700mV

16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75Ω Used Used

17 GND (VIDEO output) Used Used 18 GND (VIDEO input) Used Used 19 VIDEO output 1V 20 VIDEO / Y input 1V 21 COMMON GND Used Used

(P-P= Peak to Peak, B-W= Blanking to white peak)

Low : 0V-3V High : 8V-12V, High impedance

C : 300mV

(P-P)

, 75Ω Used Used

(B-W)

, 75Ω Used Used

(B-W)

, 75Ω

(B-W)

, 75Ω

(P-P)

(Negative sync), 75Ω Used (TV OUT) Used (LINE OUT) (Negative sync), 75Ω Used Used

[Pin assignment]

20 18 16 14 12 10 8 6 4 2

TV EXT-1 EXT-3

EXT-2

Used Used

(SCL2 / TV-LINK)

Used (R) Used (C2/R)

EXT-4

1-6 (No.YA169)

21 19 17 15 13 11 9 7 5 3 1

2.2 TECHNICAL INFORMATION

2.2.1 LCD PANEL

This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the conventional CRT (Cathode Ray Tube), as a display unit.

2.2.1.1 STRUCTURE

The LCD panel of the unit is constructed with the metal chassis that surrounds the panel unit and supports the LCD panel part and the backlight part to protect them. The colour filter glass and the TFT glass (thin film transistor) are inserted between the front polarizing filter and the rear polarizing filter. Liquid crystals are inserted between the colour filter glass and the TFT glass. Since the gap between the two glasses is only a

few µm, a spacer (bead) is inserted in the gap to retain the gap.

The backlight unit is placed behind the LCD panel. Since liquid crystals themselves do not emit light, the backlight as an external light source emits light to the LCD panel from behind through the diffuser. Circuit boards for controlling the LCD panel and the backlight are attached around the back part of the LCD panel unit. Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.

Diffuser supporter

Top chassis

Lower frame

Upper frame

Source board

Sield case

Inverter shield cover

Inverter board

Reflection plate

Panel ASSY

Diffuser (including board)

Lamp supporter

Fig.1 Structure of the LCD panel unit

2.2.1.2 SPECIFICATIONS

The following table shows the specifications of this unit.

Item Specifications Remarks

Maximum dimensions ( W × H × D ) 62.7cm × 38.9cm × 4.9cm

Weight 8.0kg

Effective screen size Diagonal : 66cm (H:33.9cm × V : 56.6cm) 26V type

Aspect ratio 15:9 Drive device/ system a-Si-TFT, active matrix system

Resolution Horizontally 1280 × Vertically 768 × RGB <W-XGA> 2949120 dots in total

Pixel pitch (pixel size) Horizontally:0.4425mm, Vertically:0.4425mm Displayed colour 16777216 colours 256 colours for R, G, and B Brightness 450cd/m

500cd/m2 at maximum Contrast ratio 500:1 Response time 16.7ms

View angle Vertically 170°, horizontally 170°

2.2.1.3 PIXEL FAULT

There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.

(1) BRIGHT FAULT

In this pixel fault, a cell that should not light originally is lighting on and off. For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.

(2) DARK FAULT

In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting. For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.

(3) FLICKER FAULT

In the pixel fault, a cell that should light originally or not light originally is flashing on and off. For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on and off.

(No.YA169)1-7

2.2.2 MAIN CPU PIN FUNCTION (IC001)

Pin No. Pin Name I/O Remark

1 TCK I Test purpose 2 TMS I Test purpose 3 TDI I Test purpose 4 TDO O Test purpose 5 P2.8 I Remote control input 6 P2. 9 I Mechanical power switch detection [Pushing:L] 7 P2.10 I IP error detection [Detection:L] 8 P2.11 O IP reset

9 P2.12 I TV-LINK communication 10 P2.13 I Power ON/OFF [ON:L] 11 P2.14 I Low B protect detection [Detection:L] 12 P2.15 I Power condition check [ON:L] 13 VSS33 I GND 14 VDD33 I 3.3V 15 P4.5 O TV-LINK communication 16 A20 O Memory (Program ROM) address 17 A19 O Memory (Program ROM) address 18 A18 O Memory (Program ROM) address 19 A17 O Memory (Program ROM) address 20 VSS25 I GND 21 VDD25 I 2.5V 22 A16 O Memory (Program ROM) address 23 A8 O Memory (Program ROM) address 24 A7 O Memory (Program ROM) address 25 A9 O Memory (Program ROM) address 26 A6 O Memory (Program ROM) address 27 A5 O Memory (Program ROM) address 28 A10 O Memory (Program ROM) address 29 A11 O Memory (Program ROM) address 30 A12 O Memory (Program ROM) address 31 VSS33 I GND 32 VDD33 I 3.3V 33 A4 O Memory (Program ROM) address 34 A3 O Memory (Program ROM) address 35 A2 O Memory (Program ROM) address 36 A1 O Memory (Program ROM) address 37 A0 O Memory (Program ROM) address 38 A13 O Memory (Program ROM) address 39 RAS/A14 O Memory (Program ROM) address 40 CAS/A15 O Memory (Program ROM) address 41 VSS33 I GND 42 VDD33 I 3.3V 43 MEMCLK O Clock for memory 44 CSSDRAM O Chip select for memory 45 CLKEN O Clock enable for memory 46 CSROM O Chip select for memory 47 RD O Read for memory 48 UDQM O Control IN/OUT buffer of Memory (IC003) 49 LDQM O Control IN/OUT buffer of Memory (IC003) 50 WR O Write for memory 51 D15 I/O Data (Program ROM) 52 VSS33 I GND 53 VDD33 I 3.3V 54 D7 I/O Data (Program ROM) 55 D0 I/O Data (Program ROM) 56 D14 I/O Data (Program ROM) 57 D8 I/O Data (Program ROM) 58 D6 I/O Data (Program ROM) 59 D1 I/O Data (Program ROM) 60 VSS33 I GND 61 VDD33 I 3.3V 62 D13 I/O Data (Program ROM) 63 D9 I/O Data (Program ROM) 64 D5 I/O Data (Program ROM)

Pin No. Pin Name I/O Remark

65 D2 I/O Data (Program ROM) 66 D12 I/O Data (Program ROM) 67 D10 I/O Data (Program ROM) 68 VSS33 I GND 69 VDD33 I 3.3V 70 D4 I/O Data (Program ROM) 71 D3 I/O Data (Program ROM) 72 D11 I/O Data (Program ROM) 73 RSTIN I Reset 74 P3.0 O I 75 P3.1 I/O I

C CLOCK 0 (for memory)

C DATA 0 (for memory) 76 P3.2 I Remote control input 77 P3.3 I Clock for OSD 78 P3.4 O Tuner system switch 79 P3.5 O Tuner system switch 80 P3.6 I Teletext mode:H 81 P3.7 I Power START 82 P3.8 I Not used 83 P3.9 I Picture mute 84 VSS33 I GND 85 VDD33 I 3.3V 86 VSS25 I GND 87 VDD25 I 2.5V 88 TXD0 O Sub micro computer communication 89 RXD0 I Sub micro computer communication 90 P3.12 I Not used 91 P3.13 I/O Not used 92 P3.15 I/O Not used 93 P5.14(YS2) I Ys for EXT-2 94 P5.15 I Headphone detection [Detection:L] 95 TRIG_IN I/O Not used 96 TRIG_OUT I/O Not used 97 P6.2 I Not used 98 P6.3 O I 99 P6.4 I/O I

C bus clock for IC control

C bus data for IC control

100 P6.5 O Multi-sound process reset 101 P6.6 I/O I

C bus data for IC control

102 VSYNC O Vertical sync for OSD 103 HSYNC O Horizontal sync for OSD 104 COR/RSTOUT O Not used 105 BLANK O Ys for OSD/Teletext 106 VDD33 I 3.3V 107 VSS33 I GND 108 XTAL1 I 6MHz 109 XTAL2 O 6MHz 110 VSSA I GND 111 VDDA I Not used 112 R O R for OSD Teletext 113 G O G for OSD Teletext 114 B I B for OSD Teletext 115 VSSA I GND 116 VDDA I 2.5V 117 CVBS2 I Video for Teletext 118 VSSA I GND 119 VDDA I 2.5V 120 CVBS1B I Video for Teletext 121 CVBS1A I Video for Teletext 122 VSSA I GND 123 VDDA I 2.5V 124 P5.0 I AFT for tuner 125 P5.1(KEY1) I Key scan data 1 [ON:H] 126 P5.2 I AGC for tuner 127 P5.3(KEY2) I Key scan data 2 [ON:H] 128 TMODE I Test purpose

1-8 (No.YA169)

2.2.3 SUB CPU PIN FUNCTION (IC7807)

Pin No. Pin name I/O Function

1 (SYSTEM0) I GND 2 (SYSTEM3) I GND 3AVCC -5V 4 X2 - Sub clock 5 X1 - Sub clock 6 VCL - Internal down voltage 7 RES I Reset [Reset : L] 8 TEST I Operation test for SUB CPU

9VSS -GND 10 OSC2 O 10MHz oscillation for system clock 11 OSC1 I 10MHz oscillation for system clock 12 VCC - 5V 13 NC O Not used 14 NC O Not used 15 BL_D2 O Back light 20ms delay for LCD panel [On:L] 16 BL_D1 O Back light 10ms delay for LCD panel [On:L] 17 I2C_STOP O Not used 18 BL_ON O Back light reset for LCD panel [Reset:L] 19 NC O Not used 20 NC O Not used 21 NC O Not used 22 NC O Not used 23 SDA1 I/O 24 A.DIM O Not used 25 SCL1 O 26 SDA0 I/O 27 SCL0 O 28 NC O Not used 29 NC O Not used 30 NC O Not used 31 NC O Not used 32 NC O Not used 33 NC O Not used 34 NC O Not used 35 NMI I Port for writing on board [Writning:L] 36 NC O Not used 37 (HD) I Not used 38 NC O Not used 39 (REMO) I Not used 40 NC O Not used 41 P85 -/I Not used 42 P86 - Not used 43 P87 - Not used 44 SCK3 O Port for writing on board 45 RXD I Port for writing on board 46 TXD O Port for writing on board 47 (PROTECTOR0) I Not used 48 NC O Not used 49 RXD2 I Port for communication (Main CPU) 50 TXD2 O Port for communication (Main CPU) 51 NC O Not used 52 (ACTIVE) I Not used 53 VD I Vertical sync 54 (REC_DET) I Not used 55 (PSS) I Not used 56 (ALARM) I Not used 57 (SYSTEM2) I Not used 58 (SYSTEM1) I Not used 59 (PROTECTOR1) I Not used 60 (AMP_PRO2) I Not used 61 (AMP_PRO1) I Not used 62 EE_CDS I Not used 63 (KEY_IN1) I Not used 64 (KEY_IN2) I Not used

C bus data (For Sub memory)

C bus clock (For Sub memory)

C bus data (For general)

C bus clock (For general)

(No.YA169)1-9

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

CAUTION:

Since this model is a laminating structure assembly, please perform in following order in the case of disassembling.

3.1.1 REMOVING THE STAND ASS'Y (Fig.3-1-1)

(1) Remove the 2 screws [A], and remove the COVER. (2) Remove the 4 screws [B], and remove the STAND ASS'Y.

JACK COVER(L)

JACK COVER(R)

STAND COVER

3.1.2 REMOVING THE REAR COVER (Fig.3-1-1, Fig.3-1-2)

• Remove the STAND ASS'Y. (1) Remove the JACK COVER(R) and JACK COVER(L). (2) Remove the 7 screws [C], 3 screws [D], 4 screws [E], and

remove the REAR COVER.

STAND

Fig.3-1-1

REAR COVER

1-10 (No.YA169)

Fig.3-1-2

3.1.3 REMOVING THE FAN BRACKET, REGULATOR PWB AND POWER CORD (Fig.3-1-3)

• Remove the STAND ASS'Y.

• Remove the REAR COVER.

(1) Disconnect the wire(CONN. [Y]) of COOLING FAN. (2) Remove the 5 screws [F], and remove the FAN BRACKET. (3) Remove the REGULATOR PWB, and disconnect the

POWER CORD.

COOLING FAN

(4) Remove the 1 screw [G], and remove the POWER CORD

HOLDER.

REGULATOR PWB

3.1.4 REMOVING THE RECEIVER PWB (Fig.3-1-4)

• Remove the STAND ASS'Y.

• Remove the REAR COVER. (1) Remove the 2 screws [H] and 2 screws [J], then remove the

TERMINAL BASE.

TERMINAL BASE

(2) Remove the 5 screws [K], and remove the RECEIVER

PWB.

FAN BRACKET

Fig.3-1-3

RECEIVER PWB

POWER CORD

POWER CORD HOLDER

3.1.5 REMOVING THE FRONT CONTROL PWB AND FRONT SENSOR PWB (Fig.3-1-5)

• Remove the STAND ASS'Y.

• Remove the REAR COVER. (1) Remove the 2 screws [L], and remove the CONTROL

KNOB.

(2) Remove the 3 screws [N], then remove the FRONT

EARTH PLATE

CONTROL PWB and FRONT SENSOR PWB.

CONTROL KNOB

Fig.3-1-4

FRONT CONTROL PWB

FRONT SENSOR PWB

CLAMP

HARNES( F,U,T),"S" WIRE

Fig.3-1-5

(No.YA169)1-11

3.1.6 REMOVING THE VIDEO PWB (Fig.3-1-6)

• Remove the STAND ASS'Y.

• Remove the REAR COVER. (1) Remove the 2 screws [N] and 1 screws [P], then remove

the JACK BASE. (2) Remove the 4 screws [Q], and remove the VIDEO PWB. (3) Remove the 2 screws [R], and remove the TUNER PWB

BASE. (4) Remove the 4 screws [S], and remove the TUNER PWB

and MSP PWB.

3.1.7 REMOVING THE MI-COM & DIST PWB (Fig.3-1-7)

• Remove the STAND ASS'Y.

• Remove the REAR COVER. (1) Remove the 7 screws [T], and remove the VIDEO PWB

BRACKET.

(2) Remove the 4 screws [U], and remove the MI-COM & DIST

PWB from VIDEO PWB BRACKET.

VIDEO PWB

MI-COM&DIST PWB

JACK BASE

Fig.3-1-6

VIDEO PWB BRACKET

TUNER PWB

MSP PWB

TUNER PWB BASE

3.1.8 REMOVING THE POWER PWB (Fig.3-1-8)

• Remove the STAND ASS'Y.

• Remove the REAR COVER.

• Remove the FUN BRACKET.

• Remove the POWER CORD.

• Remove the VIDEO PWB. (1) Remove the 4 screws [X], and remove the AV JACK

BRACKET. (2) Remove the 6 screws [Y], and remove the POWER PWB. (3) Remove the 6 screws [Z], and remove the POWER PWB

BASE.

AV JACK BRACKET

Fig.3-1-7

POWER PWB

POWER PWB BASE

1-12 (No.YA169)

Fig.3-1-8

3.1.9 REMOVING THE SPEAKER (Fig.3-1-9A, Fig.3-1-9B)

• Remove the STAND ASS'Y.

• Remove the REAR COVER.

• Remove the POWER CORD. (1) Remove the 5 screws [a], and remove the SPEAKER BOX.

SPEAKER BOX

Fig.3-1-9A

(2) Remove the 4 screws [b], and remove the SPEAKER (L/R). (3) Remove the 4 screws [c], and remove the DUCT COVER/

DUCT BASE.

NOTE:

Since the speaker is attached in a certain direction, attach the speaker in the same correct direction as it has been attached.

DUCT BASE/DUCT COVER

SPEAKER

㧔R㧕

Fig.3-1-9B

SPEAKER

㧔L㧕

(No.YA169)1-13

3.1.10 REMOVING THE LCD PANEL (Fig.3-1-10C, Fig.3-1-10A, Fig.3-1-10B)

• Remove the STAND ASS'Y.

• Remove the REAR COVER.

• Remove the POWER CORD.

• Remove the RECEIVER PWB.

• Remove the FRONT CONTROL PWB.

• Remove the FRONT SENSOR PWB.

• Remove the VIDEO PWB.

• Remove the MI-COM & DIST PWB

• Remove the POWER PWB. (1) Remove the 2 screws [a], and remove the 2 CENTRE

FRAMES.

CENTRE FRAME

Fig.3-1-10A

(2) Remove the 2 screws [b] and 2 screws [c], then remove the

RIGHT FRAME.

(3) Remove the 2 screws [b] and 2 screws [c], then remove the

LEFT FRAME. (4) Remove the 2 screws [d], and remove the TOP FRAME. (5) Remove the 3 screws [e] and 2 screws [f], then remove the

BOTTOM FRAME.

(6) Remove the 8 screws [g] and 2 screws [h], then remove the

LCD PANEL.

NOTE:

The LCD PANEL is fixed to the FRONT PANEL (at the back side) by using double-side adhesive tapes. To remove the LCD PANEL, remove the adhesive tape on the FRONT PANEL slowly.

RIGHT FRAME

TOP FRAME

LEFT FRAME

BOTTOM FRAME

Fig.3-1-10B

1-14 (No.YA169)

Fig.3-1-10C

3.1.11 REMOVING THE LCD PANEL

3.1.11.1 REMOVING THE CONTROL PWB

• Place the LCD PANEL with its backside facing upward. Be careful not to damage the surface of the screen. (1) Remove the 2 screws [A], and remove the CONTROL

PWB COVER.

(2) Remove the claws in the connectors [FPC RIGHT] and

[FPC LEFT], and pull out to remove the FLEXIBLE PWB.

NOTE:

Be careful not to damage the FLEXIBLE PWB. Especially during assembly procedure, be careful not to insert the FLEXIBLE PWB in the Panel.

(3) Remove the 2 screws [B], and remove the CONTROL

PWB.

[Confirmation after replacement]

• Confirm that voltage of 10 pin (B/L On/Off) in the connector

[CNI1] is approx.5.0V.

• Confirm that the voltage in output of the fuses [F1] and [F2]

in the connector [CNI1] is approx.5.0V.

3.1.11.2 REMOVING THE INVERTER PWB

(1) Remove the 5 screws [C], and remove the INVERTER

PWB COVER.

(2) Pull out and remove the wires from connectors [CN4]-

[CN15] (12 connectors in total).

(3) Remove the 4 screws [D], and remove the INVERTER

PWB.

[Confirmation after replacement]

• Confirm that the voltage in output of the fuses [F1] and [F2] in the connector [CN1] and the fuses [F3] and [F4] in the connector [CN2] is 16V.

• Confirm that the voltage in input of the TRANSFORMER in the Inverter Board is 8V.

• Be careful about high voltage (approx. AC900V) in output.

FUSE

OUTPUT

CONTOROL PWB INVERTER PWB

CONNECTOR

OUTPUT

TRANSFORMER

GND 8V 8V 8V 8V GND

INPUT

TRANSFORMER

FUSE

(F3, F4)

[CN4㨪CN15]

INVERTER PWB

INVERTER PWB COVER

CONTROL PWB COVER

FLEXIBLE

CN2

FUSE

(

)

F1, F2

CN1

PWB

CNI1

FRC

RIGHT

CONTROL PWB

FRC

LEFT

CNT1

FUSE

(F1, F2)

FRONT

(No.YA169)1-15

3.1.11.3 REMOVING THE BACKLIGHT UNIT

NOTE:

Do not carry out the following procedure in a dusty and dirty place. If the surface of LCD GLASS, the surface of DIFFUSER SHEET, and the inside of BACKLIGHT UNIT are dusty or dirty, they cause unevenness of a displayed screen.

• Remove the CONTROL PWB.

• Remove the INVERTER PWB.

• Place the LCD UNIT with the screen facing upward.

(1) Remove the 8 screws [E], 4screws [F], and 4 screws [G]

(16 screws in total), and remove the MAIN CHASSIS.

NOTE:

Be careful not to damage the SOURCE IC and the GATE IC on the side of LCD GLASS when removing the MAIN CHASSIS.

(2) Remove the 6 screws [H] from the top side of the LCD

UNIT.

(3) Remove the 12 screws [I] from the sides of the LCD UNIT.

Then, LCD GLASS, DIFFUSER SHEET, and BACKLIGHT UNIT are removed.

SOURCE IC

GATE IC

FRONT

MAIN CHASSIS

LCD GLASS

DIFFUSER SHEET

1-16 (No.YA169)

BACKLIGHT UNIT

3.2 REPLACEMENT OF MEMORY IC

SERVICE MENU SCREEN

SYSTEM CONSTANT SET SCREEN

This unit uses the nonvolatile memory IC.The memory IC memories data for video and deflection circuits. To replace the memory IC without the data written, malfunctions might occurred while power is on, and the normal image might not appear. When replacing the memory IC, be sure to use the IC written with the initial values of data.

3.2.1 PROCEDURE FOR REPLACING THE MEMORY IC

(1) Switch the power off and unplug the power cord from the

wall outlet.

(2) Replacing the memory IC. [Be sure to use the IC written

with the initial values of data]

(3) Plug the power cord into the wall outlet and switch the

power on.

(4) Check and setting of SYSTEM CONSTANT SET

a) Press the [INFORMATION] key and [MUTING] key

on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig.1)

b) In the SERVICE MENU, press the [INFORMATION]

key and [MUTING] key simultaneously. Then, the SYSTEM CONSTANT SET screen will be displayed. (See FIg.2)

c) Check whether the setting value of the SYSTEM

CONSTANT SET is the same as these indicated in Table 1.

d) Press the [INFORMATION] key twice to return to the

normal screen.

(5) Receive channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels.

(6) User setting

Memories the user setting items.The [USER SETTINGS OF MENU] setting is as next page.

(7) Setting of SERVICE MENU

Check the setting items in the SERVICE MENU, set if necessary.For setting method, please refer to the [ADJUSTMENT PREPARATION] to [ADJUSTMENT PROCEDURE] of ADJUSTMENT section.

SERVICE MENU SCREEN

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DD/CM

5. VSM PRESET 6. STATUS

7. VNR 8. IP

9. SHIPPING (OFF) 0. BUS FREE

1-9 : SELECT i : EXIT

Fig.1

SYSTEM CONSTANT SET SCREEN

SYSTEM CONSTANT SET

1. DESTINATION EURO

-/+ : STORE i : EXIT

3.2.2 SETTING OF THE SYSTEM CONSTANT SET

Setting item Setting content Setting value

DESTINATION ASIA / EURO EURO

3.2.3 FACTORY SHIPMENT SETTING

3.2.3.1 USER SETTING OF SWITCHS ON REMOTE CONTROL UNIT

Setting item Setting value

POWER OFF

CHANNEL PR1

PRESET CHANNEL Refer to OPERATION INSTRUCTIONS

VOLUME 10

ZOOM PANORAMIC

3D SOUND OFF

Table 2

Fig.2

Table 1

(No.YA169)1-17

3.2.3.2 USER SETTINGS OF MENU

Setting item Setting value Setting item Setting value

POWER OFF SOUND SETTING

CHANNEL PR1 BASS Centre

TREBLE Centre

PRESET CHANNEL Refer to

OPERATING INSTRUCTIONS

BALANCE Centre

SPEAKER ON

VOLUME 10 BBE ON

PICTURE SETTING 3D SOUND OFF

PICTURE MODE BRIGHT A. H. B ON

COLOUR TEMP. COOL HEADPHONE VOLUME 20

TV SPEAKER OFF

OUTPUT MAIN

PICTURE FEATURES EXT SETTING

DIGITAL VNR AUTO S-IN ---

Super DigiPure AUTO ID LIST ---

COLOUR SYSTEM TV Depends on PR/CH DUBBING EXT-1 → EXT-2

EXT AUTO FEATURES

MOVIE THEATRE AUTO SLEEP TIMER OFF

4:3 AUTO ASPECT PANORAMIC BLUE BACK ON

COLOUR MANAGEMENT ON

CHILD LOCK / CHANNEL GUARD SET ID NO 0000

PIP POSISION Right below INSTALL

ZOOM PANORAMIC LANGUAGE ENGLISH

AUTO PROGRAM Only for preset channels

EDIT/MANUAL Only for preset channels

Table 3

3.2.3.3 VSM PRESET SETTING

Setting value

Item No.

Setting

Item

Variable

range

PICTURE MODE COLOUR TEMP.

BRIGHT STD SOFT COOL NORMAL WARM

1 CONT -16~16 6 0 0 - - -

2 BRIGHT -16~16 -6 0 0 - - -

3 SHARP -16~16 3 0 -2 - - -

4 COLOUR -16~16 0 0 0 - - -

5 TINT -16~16 0 0 0 - - -

6 B. LIGHT -16~16 16 16 -8 - - -

1 WDR R -64~63 - - - -8 0 0

2 WDR G -64~63 - - - -3 0 -6

3 WDR B -64~63 - - - 23 0 -3

3.2.3.3.1 SETTING OF VSM PRESET

(1) Enter "5.VSM PRESET" from the SERVICE MENU. (2) Press the [OK] key to select BRIGHT/STD/SOFT/COOL/NORMAL/WARM mode. (3) Select the setting item using the [FUNCTION (UP/DOWN)] key. (4) Set the value using the [FUNCTION (+/-)] key. (5) Press the [OK] key to memorize the set value. (6) Press the [INFORMATION] key twice to return to the normal screen.

1-18 (No.YA169)

Table 4

3.2.3.4 SERVICE MENU SETTING ITEMS

Setting item Setting value Setting item Setting value

1.IF 1.VCO

6.STATUS (Do not adjust)

2.ATT ON/OFF

2.V/C 1.CUT OF R

2.CUT OF G

3.CUT OF B

4.DRIVE R

5.DRIVE G

6.DRIVE B

7.TWN HI R

8.TWN HI B

9.BRIGHT

10.CONT

11.TWN BRG

12.TWN CNT

13.COLOUR

14.HUE

15.BY GAIN

16.TWN COL

17.TWN TNT

7.VNR

(Do not adjust)

1.MYLV

2.ONMVF

3.MYCOR

4.MYGA

5.YEGON

6.YEGL

7.YLTL

8.MCLV

9.MCGA

10.MCCOR

11.CLTL

12.YNGA

13.COR_OF

14.LPF_OF

15.YCTL

16.YNCL

17.YNCON

18.B OF MR

19.B OF MB

20.B OF SR

21.B OF SB

22.M BOFST

23.M ROFST S01 ~ S99 A01 ~ A17 PDA01 ~ PDA12

3.AUDIO

(Do not adjust)

4.DD/CM DDT01 ~ DDT34

5.VSM PRESET PICTURE MODE

1.ERROR LIMIT

2.A2 ID THR

3.Q-PEAK

4.SOUND LEVEL / SOUND SYSTEM B/G

CMT01 ~ CMT57

1.CONT

2.BRIGHT

8.IP

(Do not adjust)

PPA001 ~ PPA008 PPB001 ~ PPB036 PPC001 ~ PPC007 ADS001 ~ ADS034 IPA001 ~ IPA120 IPB001 ~ IPB088 IPC001 ~ IPC044 IPD001 ~ IPD058

9.SHIPPING(OFF) (Do not use under the adjustment)

3.SHARP

4.COLOUR

5.TINT

6.B. LIGHT COLOUR TEMP.

1.WDR R

2.WDR G

3.WDR B

Table 5

(No.YA169)1-19

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) Shift with the tweezers and remove the chip part.

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.

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

(2) As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove the chip part.

NOTE :

After removing the part, remove remaining solder from the pattern.

[Transistors, diodes, variable resistors, etc.]

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the

solder.

(3) First solder lead A as indicated in the figure.

(4) Then solder leads B and C.

1-20 (No.YA169)

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) Prior to the following procedure, be sure to connect the

receiver unit and the display unit.

(2) Adjustment of many Majority of the adjustment items for

this unit is performed using the remote control.

(3) However, adjustment of some adjustment items is

performed in the conventional way, i.e. with components

on the boards. (4) Ensure that the power supply is AC220V. (5) Allow the set and the measuring devices to run for at least

30 minutes. (6) Do not alter settings of items/preset values on the service

screen that are not stated in this manual. (7) Unless otherwise stated in the “ADJUSTMENT

PROCEDURE” section, follow the settings for the features

stated below using the remote control.

Setting item Settings

PICTURE MODE STANDARD

PICTURE adjustment All center (00)

COLOUR TEMP. NORMAL

DIGITAL VNR MIN

Super Digi Pure AUTO

SOUND adjustment All center (00)

BBE OFF

AHS OFF

A.H.B OFF

ZOOM FULL

4.2 MEASURING INSTRUMENT AND FIXTURES

• DC voltmeter (or Digital voltmeter)

• Oscilloscope

• Signal generator (Pattern generator)

• Remote control unit

(No.YA169)1-21

4.3 ADJUSTMENT LOCATION & WIRING

VIDEO PWB

CN00AM

MI-COM & DIST PWB

AL AM

CN004

CN004 CN005

MSP PWB

CN005

TUNER PWB

CN000A

CN000H

CN000X

CN00AH

CN000B

TOP

CONTOROL PWB

(LCD UNIT : CNT1)

CN000J

CN000K

CN000T

PWB

REGULATOR

INVERTER PWB

(LCD UNIT : CN2)

INVERTER PWB

(LCD UNIT : CN1)

POWER PWB

POWER CORD

FAN

CN1001

J301

J302

RECEIVER PWB

J201

PWB

FRONT SENSOR

CN8003

CN0001

SPEAKER(L) SPEAKER(R)

J101

J401

PWB

CN3003

CN300T

CN300U

FRONT CONTROL

1-22 (No.YA169)

4.4 SERVICE MENU SCREEN

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DD/CM

5. VSM PRESET 6. STATUS

7. VNR 8. IP

9. SHIPPING (OFF) 0. BUS FREE

1-9 : SELECT i : EXIT

DDT01 ~ DDT34

CMT01 ~ CMT57

PICTURE MODE

BRIGHT STD SOFT

COLOUR TEMP.

COOL NORMAL WARM

1. SOFT

2. TELETEXT

3. ASPECT

4. IC

5. DEBUG

6. PANEL

4. DD/CM

DD/CM PAL

DDT01 0000

- / +

1. CONT

2. BRIGHT

3. SHARP

4. COLOUR

- / +

: STORE i : EXIT

5. VSM PRESET

VSM PRESET BRIGHT

1.CONT

: STORE i : EXIT

TINT B.LIGHT WDR R WDR G WDR B

6. STATUS

STATUS

1.SOFT

: SELECT i : EXIT

000

1.IF

IF SERVICE MENU

1. VCO

2. ATT ON/OFF

1-2 : SELECT i : EXIT

2. V/C

V/C

1. CUT OF R

- / +

: STORE i : EXIT

1. ERROR LIMIT 0100 ERROR LIMIT = C_AD_BITS =

- / +

PAL

0000

3. AUDIO

AUDIO

: STORE i : EXIT

Do not adjust

0000 00000000

Do not adjust

1. CUT OF R

2. CUT OF G

3. CUT OF B

4. DRIVE R

5. DRIVE G

6. DRIVE B

7. TWN HI R

8. TWN HI B

9. BRIGHT

10. CONT

11. TWN BRG

12. TWN CNT

13. COLOUR

1. ERROR LIMIT

2. A2 ID THR

3. Q

-PEAK

4. SOUND SYSTEM B/G

14. HUE

15. BY GAIN

16. TWN COL

17. TWN TNT

18. B OF MR

19. B OF MB

20. B OF SR

21. B OF SB

22. M BOFST

23. M ROFST S01 ~ S99 A01 ~ A17 PDA01 ~ PDA12

1. MYLV

2. ONMVF

3. MYCOR

4. MYGA

5. YEGON

6. YEGL

7. YLTL

8. MCLV

9. MCGA

10. MCCOR

11. CLTL

12. YNGA

13. COR_OF

14. LPF_OF

15. YCTL

16. YNCL

17. YNCON

PPA001 ~ PPA008 PPB001 ~ PPB036 PPC001 ~ PPC007 ADS001 ~ ADS034 IPA001 ~ IPA120 IPB001 ~ IPB088 IPC001 ~ IPC044 IPD001 ~ IPD058

- / +

IP PANOLAMIC PAL

0000 PPA001 0000

- / +

7. VNR

VNR LEVEL4

1.MYLV

: STORE i : EXIT

000

8. IP

(No.YA169)1-23

4.5 BASIC OPERATION OF THE SERVICE MENU MODE [USING REMOTE CONTROL UNIT]

SERVICE MENU SCREEN

4.5.1 TOOLS OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the remote control unit.

4.5.2 HOW TO ENTER THE SERVICE MENU MODE

(1) Press the [INFORMATION] key and the [MUTING] key of

the REMOTE CONTROL UNIT simultaneously, and the SERVICE MENU screen of Fig.4 will be displayed.

(2) When the Main Menu is displayed, press any key of the [1]

to [0] key to enter the corresponding menu mode. *Press any of the [1] to [0] keys before the Service Menu mode disappears.

(3) Select the service item using the [FUNCTION (/)] key. (4) Set the value using the [FUNCTION (/)] key. (5) Press the [OK] key to save the value.

4.5.5 SETTINGS OF THE SERVICE MENUS

1. IF (VCO adjustment, ATT setting) [Do not adjust]

2. V/C (VIDEO setting) [Do not change settings of items that are not included in the "ADJUSTMENT PROCEDURE".] Sets output data to the video circuit.

• [Function (/)] key

For scrolling up/down the setting items.

• [Function (/)] key

For scrolling up/down the setting values.

3. AUDIO (SOUND setting) [Do not adjust]

4. DD/CM (Panel picture processing setting)

SERVICE MENU SCREEN

[Do not change settings of items that are not included in the "ADJUSTMENT PROCEDURE".]

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DD/CM

5. VSM PRESET 6. STATUS

7. VNR 8. IP

9. SHIPPING (OFF) 0. BUS FREE

Sets output data to the deflection circuit.

• [Function (/)] key

For scrolling up/down the setting items.

DDT01

• [Zoom (red)] key

For switching to the next item.

DDT01 CMT01

...

CMT01

...

1-9 : SELECT i : EXIT

Fig.4

4.5.3 HOW TO EXIT THE SERVICE MENU MODE

Press the [INFORMATION] key to exit the Service Menu mode.

4.5.4 SERVICE CONTROL KEY LAYOUT ON THE REMOTE CONTROL UNIT

MUTING

1~0

INFOMATION

ZOOM

FUNCTION /

• [Function (/)] key

For scrolling up/down the setting values.

5. VSM PRESET (PICTURE preset setting)

[Refer to page VSM PRESET SETTING.]

6. STATUS (The version of software, the aspect, and the state of debugging are displayed. )

[Setting for this item is not required in servicing]

7. VNR (Noise reduction setting) [Do not adjust] Sets output data to the digital noise reduction circuit.

8. IP (DIST setting) [Do not adjust] Sets output data to the DIST circuit.

9. SHIPPING (OFF) [Setting for this item is not required in servicing]

10. BUE FREE [Setting for this item is not required in servicing]

Fig.5

1-24 (No.YA169)

4.6 DEFAULT VALUES IN THE SERVICE MENU SETTING MODE

• Perform fine-tuning based on the "default values" using the remote control when in the SERVICE MENU setting mode.

• The "default values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values. But, don't change the values that are not written in "ADJUSTMENT PROCEDURE". They are fixed values.

4.6.1 [2. V/C]

4.6.1.1 VIDEO SYSTEM

Setting value

Item No.

Item

name

Variable

range

TV EXT-1 / 2 / 3 EXT-4

PAL SECAM PAL SECAM NTSC 625i 525i 625p 525p

1 CUT OF R 0000~0255 0088 ←←←←0000 ←←← 2 CUT OF G 0000~0255 0101 ←←←←0000 ←←← 3 CUT OF B 0000~0255 0106 ←←←←0000 ←←← 4 DRIVE R 0000~0255 0129 ←←←←0000 ←←← 5 DRIVE G 0000~0255 0112 ←←←←0000 ←←← 6 DRIVE B 0000~0255 0110 ←←←←0000 ←←← 7 TWIN HI R 0000~0127 0071 ←←←←0000 ←←← 8 TWIN HI B 0000~0127 0068 ←←←←0000 ←←←

9 BRIGHT 0000~0255 0013 ←←←←0000 ←←← 10 CONT 0000~0015 0015 ←←←←0000 ←←← 11 TWN BRG 0000~0127 0075 ←←←←-002 ← 0000 ← 12 TWN CNT 0000~0015 0006 ←←←←0000 ←←← 13 COLOUR 0000~0015 0009 ← 0000 ← 0007 0000 ←←← 14 HUE 0000~0063 0000 ← 0034 ← 0034 0000 ←←← 15 BY GAIN 0000~0063 0043 ← 0000 ← 0043 0000 ←←← 16 TWN COL 0000~0015 0006 ← 0002 ← 0002 ←←←← 17 TWN TNT 0000~0063 0034 ← 0000 ← 0034 ←←←← 18 B OF MR 0000~0015 0008 ←←←←←←←← 19 B OF MB 0000~0015 0008 ←←←←←←←← 20 B OF SR 0000~0015 0008 ←←←←←←←← 21 B OF SB 0000~0015 0008 ←←←←←←←← 22 M BOFSET 0000~0007 0000 ←←←←←←←← 23 M ROFSET 0000~0007 0000 ←←←←←←←←

Item No.

Item

name

Variable

S01 COLOUR 0000~0255 0120 0120 0138

S02 HUE -128~0127 0000 0000 0000

S03 (NO DISPLAY) -128~0127 0000 0000 0000

S04 (NO DISPLAY) -128~0127 0000 0000 0000

S05 BRIGHT 0000~0255 0055 0055 0060

S06 CONT 0000~0255 0128 0128 0128

S07 (NO DISPLAY) -128~0127 0000 0000 0000

S08 (NO DISPLAY) -128~0127 0000 0000 0000

S09 (NO DISPLAY) 0000~0255 0140 0140 0138

S10 (NO DISPLAY) -128~0127 0000 0000 0000

S11 (NO DISPLAY) -128~0127 0006 0006 0006

S12 (NO DISPLAY) 0000~0003 0000 0000 0000

range

Setting value

PAL SECAM NTSC

(No.YA169)1-25

Item No.

Item

name

Variable

range

PAL SECAM NTSC

Setting value

S13 R GAIN 0000~0255 0249 0249 0249

S14 (NO DISPLAY) -128~0127 0000 0000 0000

S15 G GAIN 0000~0255 0255 0255 0255

S16 (NO DISPLAY) -128~0127 0001 0001 0001

S17 B GAIN 0000~0255 0254 0254 0254

S18 (NO DISPLAY) -128~0127 0000 0000 0000

S19 (NO DISPLAY) 0000~0255 0128 0128 0128

S20 (NO DISPLAY) -128~0127 0000 0000 0000

S21 (NO DISPLAY) 0000~0255 0128 0128 0128

S22 (NO DISPLAY) -128~0127 0000 0000 0000

S23 (NO DISPLAY) 0000~0255 0128 0128 0128

S24 (NO DISPLAY) -128~0127 0000 0000 0000

S25 (NO DISPLAY) 0000/0001 0000 0000 0000

S26 (NO DISPLAY) 0000/0001 0000 0000 0000

S27 (NO DISPLAY) 0000/0001 0000 0000 0000

S28 (NO DISPLAY) 0000/0001 0000 0000 0000

S29 (NO DISPLAY) 0000/0001 0000 0000 0000

S30 (NO DISPLAY) 0000~0031 0000 0000 0000

S31 (NO DISPLAY) 0000~0063 0002 0002 0002

S32 (NO DISPLAY) 0000~0063 0019 0019 0018

S33 (NO DISPLAY) 0000/0001 0001 0001 0001

S34 (NO DISPLAY) 0000/0001 0001 0001 0001

S35 (NO DISPLAY) 0000/0001 0000 0000 0000

S36 (NO DISPLAY) 0000~0031 0000 0000 0000

S37 (NO DISPLAY) 0000~0255 0220 0220 0220

S38 (NO DISPLAY) 0000~0063 0050 0050 0050

S39 (NO DISPLAY) 0000~0063 0060 0060 0060

S40 (NO DISPLAY) 0000/0001 0001 0001 0001

S41 (NO DISPLAY) 0000/0001 0001 0001 0001

S42 (NO DISPLAY) 0000~0003 0001 0001 0001

S43 (NO DISPLAY) 0000~0031 0009 0009 0009

S44 (NO DISPLAY) 0000~0003 0001 0001 0001

S45 (NO DISPLAY) 0000~0003 0002 0002 0002

S46 (NO DISPLAY) 0000~0015 0015 0015 0015

S47 (NO DISPLAY) 0000~0015 0015 0015 0015

S48 (NO DISPLAY) 0000~0015 0015 0015 0015

S49 (NO DISPLAY) 0000/0001 0000 0000 0000

S50 (NO DISPLAY) 0000~0255 0002 0002 0002

S51 (NO DISPLAY) 0000/0001 0000 0000 0000

S52 (NO DISPLAY) 0000~0255 0076 0076 0076

S53 (NO DISPLAY) 0000/0001 0000 0000 0000

S54 (NO DISPLAY) 0000~0255 0006 0006 0006

S55 (NO DISPLAY) 0000/0001 0000 0000 0000

S56 (NO DISPLAY) 0000~0255 0094 0094 0094

S57 (NO DISPLAY) 0000~0255 0000 0000 0000

1-26 (No.YA169)

Item No.

Item

name

Variable

range

PAL SECAM NTSC

Setting value

S58 (NO DISPLAY) 0000~0015 0000 0000 0000

S59 (NO DISPLAY) 0000~0255 0000 0000 0000

S60 (NO DISPLAY) 0000~0015 0000 0000 0000

S61 (NO DISPLAY) 0000/0001 0001 0001 0001

S62 (NO DISPLAY) 0000~0127 0016 0016 0016

S63 (NO DISPLAY) 0000/0001 0000 0000 0000

S64 (NO DISPLAY) 0000~0127 0000 0000 0000

S65 (NO DISPLAY) 0000~0003 0002 0002 0002

S66 (NO DISPLAY) 0000~0003 0001 0001 0001

S67 (NO DISPLAY) 0000~0003 0002 0002 0003

S68 (NO DISPLAY) 0000~0015 0000 0000 0000

S69 (NO DISPLAY) 0000~0063 0019 0019 0019

S70 (NO DISPLAY) 0000/0001 0001 0001 0001

S71 (NO DISPLAY) 0000~0255 0255 0255 0255

S72 (NO DISPLAY) 0000~0255 0255 0255 0255

S73 (NO DISPLAY) 0000~0255 0255 0255 0255

S74 (NO DISPLAY) 0000~0031 0000 0000 0000

S75 (NO DISPLAY) 0000~0031 0000 0000 0000

S76 (NO DISPLAY) -128~0128 0000 0000 0000

S77 (NO DISPLAY) -128~0128 0000 0000 0000

S78 (NO DISPLAY) 0000~0255 0255 0255 0255

S79 (NO DISPLAY) 0000~0255 0000 0000 0000

S80 (NO DISPLAY) 0000~0255 0255 0255 0255

S81 (NO DISPLAY) 0000~0255 0000 0000 0000

S82 (NO DISPLAY) 0000~0255 0255 0255 0255

S83 (NO DISPLAY) 0000~0255 0000 0000 0000

S84 (NO DISPLAY) 0000~0255 0216 0216 0216

S85 (NO DISPLAY) 0000~0255 0127 0127 0127

S86 (NO DISPLAY) 0000~0255 0127 0127 0127

S87 (NO DISPLAY) 0000~0003 0003 0003 0003

S88 (NO DISPLAY) 0000~0007 0000 0000 0000

S89 (NO DISPLAY) 0000~0255 0000 0000 0000

S90 (NO DISPLAY) 0000~0127 0000 0000 0000

S91 (NO DISPLAY) 0000~0007 0007 0007 0007

S92 (NO DISPLAY) 0000~0031 0031 0031 0031

S93 (NO DISPLAY) 0000~0007 0007 0007 0007

S94 (NO DISPLAY) 0000~0031 0031 0031 0031

S95 (NO DISPLAY) 0000~0255 0060 0060 0050

S96 (NO DISPLAY) 0000~0015 0003 0003 0006

S97 (NO DISPLAY) 0000~0063 0040 0040 0040

S98 (NO DISPLAY) 0000~0063 0000 0000 0000

S99 (NO DISPLAY) 0000~0063 0000 0000 0000

(No.YA169)1-27

4.6.1.2 AUDIO SYSTEM

Item No.

Item

name

Variable

range

A01 (NO DISPLAY) 0000~0007 0001

A02 (NO DISPLAY) 0000~0007 0001

A03 (NO DISPLAY) 0000~0007 0001

A04 (NO DISPLAY) 0000~0007 0000

A05 (NO DISPLAY) 0000~0009 0003

A06 (NO DISPLAY) 0000~0015 0004

A07 (NO DISPLAY) 0000~0015 0006

A08 (NO DISPLAY) 0000~0015 0003

A09 (NO DISPLAY) 0000~0007 0006

A10 (NO DISPLAY) 0000~0007 0004

A11 (NO DISPLAY) 0000~0063 0063

A12 (NO DISPLAY) 0000~0063 0063

A13 (NO DISPLAY) 0000~0003 0000

A14 (NO DISPLAY) 0000~0007 0000

A15 (NO DISPLAY) 0000~0003 0000

A16 (NO DISPLAY) 0000~0003 0000

A17 (NO DISPLAY) 0000~0003 0000

Setting value

Item No.

Item

name

Variable

range

Setting value

PDA01 (NO DISPLAY) 0000~0255 0000

PDA02 (NO DISPLAY) 0000~0255 0031

PDA03 (NO DISPLAY) 0000~0255 0085

PDA04 (NO DISPLAY) 0000~0255 0004

PDA05 (NO DISPLAY) 0000/0001 0001

PDA06 (NO DISPLAY) 0000/0001 0000

PDA07 (NO DISPLAY) 0000~0255 0150

PDA08 (NO DISPLAY) 0000~0255 0150

PDA09 (NO DISPLAY) 0000~0255 0002

PDA10 (NO DISPLAY) 0000~0255 0060

PDA11 (NO DISPLAY) 0000~0255 0000

PDA12 (NO DISPLAY) 0000~0127 0000

4.6.2 [3.AUDIO] (MULTISOUND SYSTEM) (*All fixed)

Item No.

Item

name

Variable

range

Setting value

1 ERROR LIMIT 0000~0FF0 0100

2 A2 ID THR 0000~00FF 0019

3 Q-PEAK - -

4 SOUND LEVEL F00F~FFFF FFFF

1-28 (No.YA169)

4.6.3 [4.DD/CM]

NOTE:

• For reference, initial setting values (except OSD-G/B/R) in the following conditions are written here.

• Input signal : PAL/SECAM/NTSC

• Picture mode : Standard

•Zoom : Full

• Multi screen : Single screen

• Colour temp. : Normal

Item No.

Item

name

Variable

range

PAL SECAM NTSC

Setting value

DDT01 (NO DISPLAY) 0000~0015 0000 0000 0000

DDT02 (NO DISPLAY) 0000~0255 0192 0192 0192

DDT03 (NO DISPLAY) 0000~0255 0255 0255 0255

DDT04 (NO DISPLAY) 0000~0255 0255 0255 0255

DDT05 (NO DISPLAY) 0000~0255 0255 0255 0000

DDT06 (NO DISPLAY) 0000~0255 0255 0255 0255

DDT07 (NO DISPLAY) 0000~0003 0000 0000 0000

DDT08 (NO DISPLAY) 0000~0255 0255 0255 0255

DDT09 (NO DISPLAY) 0000~0003 0000 0000 0000

DDT10 (NO DISPLAY) 0000~0255 0000 0000 0000

DDT11 (NO DISPLAY) 0000~0007 0000 0000 0000

DDT12 (NO DISPLAY) 0000~0255 0090 0090 0090

DDT13 (NO DISPLAY) 0000~0255 0000 0000 0000

DDT14 (NO DISPLAY) 0000~0003 0000 0000 0000

DDT15 (NO DISPLAY) 0000~0007 0000 0000 0000

DDT16 (NO DISPLAY) 0000~0255 0021 0021 0021

DDT17 (NO DISPLAY) 0000/0001 0000 0000 0000

DDT18 (NO DISPLAY) 0000/0001 0000 0000 0000

DDT19 (NO DISPLAY) 0000~0063 0001 0001 0001

DDT20 (NO DISPLAY) 0000~0015 0000 0000 0000

DDT21 (NO DISPLAY) 0000~0015 0000 0000 0000

DDT22 (NO DISPLAY) 0000~0015 0000 0000 0000

DDT23 (NO DISPLAY) 0000~0015 0000 0000 0000

DDT24 (NO DISPLAY) 0000/0001 0000 0000 0000

DDT25 (NO DISPLAY) 0000/0001 0000 0000 0000

DDT26 (NO DISPLAY) 0000/0001 0000 0000 0000

DDT27 (NO DISPLAY) 0000~0007 0000 0000 0000

DDT28 (NO DISPLAY) 0000~0255 0250 0250 0250

DDT29 (NO DISPLAY) 0000~0003 0000 0000 0000

DDT30 (NO DISPLAY) 0000/0001 0000 0000 0000

DDT31 (NO DISPLAY) 0000~0007 0005 0005 0005

DDT32 (NO DISPLAY) 0000~0255 0170 0170 0170

DDT33 (NO DISPLAY) 0000~0255 0000 0000 0000

DDT34 (NO DISPLAY) 0000~0255 0032 0032 0032

Item No.

Item

name

Variable

CMT01 (NO DISPLAY) 0000~0003 0000 0000 0000

CMT02 (NO DISPLAY) 0000~0255 0090 0090 0090

range

Setting value

PAL SECAM NTSC

(No.YA169)1-29

Item No.

Item

name

Variable

range

PAL SECAM NTSC

Setting value

CMT03 (NO DISPLAY) 0000~0255 0030 0030 0020

CMT04 (NO DISPLAY) 0000~0255 0030 0030 0030

CMT05 (NO DISPLAY) 0000~0063 0059 0059 0060

CMT06 (NO DISPLAY) -128~0127 0005 0005 -002

CMT07 (NO DISPLAY) -128~0127 0002 0002 0010

CMT08 (NO DISPLAY) -128~0127 0000 0000 0000

CMT09 (NO DISPLAY) -128~0127 0000 0000 0003

CMT10 (NO DISPLAY) 0000~0003 0000 0000 0000

CMT11 (NO DISPLAY) 0000~0255 0160 0160 0160

CMT12 (NO DISPLAY) 0000~0255 0020 0020 0020

CMT13 (NO DISPLAY) 0000~0255 0020 0020 0020

CMT14 (NO DISPLAY) 0000~0063 0000 0000 0059

CMT15 (NO DISPLAY) -128~0127 0006 0006 -003

CMT16 (NO DISPLAY) -128~0127 0005 0005 0005

CMT17 (NO DISPLAY) -128~0127 0000 0000 0000

CMT18 (NO DISPLAY) -128~0127 0005 0005 0000

CMT19 (NO DISPLAY) 0000~0003 0000 0000 0000

CMT20 (NO DISPLAY) 0000~0255 0196 0196 0196

CMT21 (NO DISPLAY) 0000~0255 0030 0030 0030

CMT22 (NO DISPLAY) 0000~0255 0050 0050 0055

CMT23 (NO DISPLAY) 0000~0063 0061 0061 0000

CMT24 (NO DISPLAY) -128~0127 -003 -003 0003

CMT25 (NO DISPLAY) -128~0127 0022 0022 0012

CMT26 (NO DISPLAY) -128~0127 0006 0006 0005

CMT27 (NO DISPLAY) -128~0127 0020 0020 0012

CMT28 (NO DISPLAY) 0000~0003 0001 0001 0001

CMT29 (NO DISPLAY) 0000~0255 0070 0070 0070

CMT30 (NO DISPLAY) 0000~0255 0035 0035 0035

CMT31 (NO DISPLAY) 0000~0255 0040 0040 0040

CMT32 (NO DISPLAY) 0000~0063 0000 0000 0000

CMT33 (NO DISPLAY) -128~0127 0005 0005 0002

CMT34 (NO DISPLAY) -128~0127 0016 0016 0015

CMT35 (NO DISPLAY) -128~0127 0000 0000 -004

CMT36 (NO DISPLAY) -128~0127 0016 0016 0020

CMT37 (NO DISPLAY) 0000~0255 0064 0064 0064

CMT38 (NO DISPLAY) 0000~0255 0066 0066 0068

CMT39 (NO DISPLAY) 0000~0255 0078 0078 0078

CMT40 (NO DISPLAY) -128~0127 0000 0000 0000

CMT41 (NO DISPLAY) -128~0127 0005 0005 0004

CMT42 (NO DISPLAY) 0000/0001 0000 0000 0000

CMT43 (NO DISPLAY) 0000~0255 0080 0080 0080

CMT44 (NO DISPLAY) 0000/0001 0001 0001 0001

CMT45 (NO DISPLAY) 0000~0255 0080 0080 0080

CMT46 (NO DISPLAY) 0000/0001 0000 0000 0000

CMT47 (NO DISPLAY) 0000~0255 0080 0080 0080

1-30 (No.YA169)

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